SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-K

[X]  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE 
	SECURITIES EXCHANGE ACT OF 1934 
	For the fiscal year ended December 31, 2002 or
( )   TRANSITION REPORT PERSUANT TO SECTION 13 OR 15 (D) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from _______ to _______

Commission file number        333-104061-01



BCTC IV ASSIGNOR CORP.(Exact name of registrant as specified in its charter)



|Delaware                          | 04-3208532         
|--------------------------------- | -------------------
|(State or other jurisdiction      | (I.R.S. Employer   
|of incorporation or organization) | Identification No.)



One Boston Place, Suite 2100, Boston, Massachusetts  02108(Address of principal executive offices)           (Zip Code)

Registrants telephone number, including area code (617)624-8900Securities registered pursuant to Section 12(b) of the Act:



|Title of each class | Name of each exchangeon which registered
|------------------- | ----------------------------------------
|
|                    |                                         
|None                | None                                    

Securities registered pursuant to Section 12(g) of the Act:

Indicate by check mark whether the Fund (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities
Exchange Act of 1934 during the preceding twelve months (or for
such shorter period that the Fund was required to file such
reports), and (2) has been subject to such filing requirements for
the past 90 days.



|YES |         | NO | X      
|--- | ------- | -- | -------
|    | ------- |    | -------

Indicate by check mark if disclosure of delinquent filers pursuant to 
Item 405 or Regulation S-K ( 229.405 of this chapter) is not contained 
herein, and will not be contained, to the best of registrant's knowledge, 
in definitive proxy or information statements incorporated by reference in 
Part III of this Form 10-K or any amendment to this Form 10-K.

__
|XX|

DOCUMENTS INCORPORATED BY REFERENCE

The following documents of the Fund are incorporated by reference:





|Form 10-K    |                                                                                        
|------------ | ---------------------------------------------------------------------------------------
|Parts        | Document                                                                               
|             |                                                                                        
|Parts I, III | Form 10-K of Boston Capital Tax Credit Fund IV LP dated March 31, 2003, as supplemented
|             |                                                                                        
|             |                                                                                        





BCTC IV ASSUGNOR CORP.

Form 10-K ANNUAL REPORT FOR THE YEAR ENDED DECEMBER 31, 2002



TABLE OF CONTENTS



PART I



|Item 1. | Business                                           
|------- | ---------------------------------------------------
|Item 2. | Properties                                         
|Item 3. | Legal Proceedings                                  
|Item 4. | Submission of Matters to a Vote of Security Holders
|        |                                                    



PART II

|Item 5. | Market for the Assignor Limited Partner's        
|------- | -------------------------------------------------
|        |                                                  
|Item 6. |                                                  
|Item 7. | Management's Discussion and Analysis of Financial
|        |                                                  
|Item 8. | Financial Statements and Supplementary Data      
|Item 9. | Changes in and Disagreements with Accountants on 
|        |                                                  

PART III

|Item 10. | Directors and Executive Officers of the Assignor Limited Partner
|-------- | ----------------------------------------------------------------
|Item 11. | Executive Compensation                                          
|Item 12. | Security Ownership of Certain Beneficial Owners                 
|         |                                                                 
|Item 13. | Certain Relationships and Related Transactions                  
|Item 14. | Controls and Procedures                                         





PART IV

|Item 15. | Exhibits, Financial Statement Schedules,
|-------- | ----------------------------------------
|         |                                         
|         |                                         
|         | Signatures                              





PART I

Item 1.	Business

Organization

BCTC IV Assignor Corp,

Description of Business

The Assignor Limited Partner's sole purpose is to act as a conduit through which all of the economic and tax benefits of an investment in the Fund are passed along to the investor BAC Holders.  The Assignor Limited Partner does not charge any fees for its services and has no income.The Fund's principal business is to invest as a limited partner in other limited partnerships (the "Operating Partnerships") each of which will own or lease and will operate an Apartment Complex exclusively or partially for low- and moderate-income tenants.  Each Operating Partnership in which the Fund will invest will own Apartment Complexes which are completed, newly-constructed, under construction or rehabilitation, or to-be constructed or rehabilitated, and which are expected to receive Government Assistance.  Each Apartment Complex is expected to qualify for the low-income housing tax credit under Section 42 of the Code (the "Federal Housing Tax Credit"), thereby providing tax benefits over a period of ten to twelve years in the form of tax credits which investors may use to offset income, subject to certain strict limitations, from other sources.  Certain Apartment Complexes may also qualify for the historic rehabilitation tax credit under Section 48 of the Code (the "Rehabilitation Tax Credit").  The Federal Housing Tax Credit and the Government Assistance programs are described on pages 64 to 88 of the Prospectus, as supplemented, under the captions "Tax Credit Programs" and "Government Assistance Programs," which is incorporated herein by reference.  Section 236 (f) (ii) of the National Housing Act, as amended, in Section 101 of the Housing and Urban Development Act of 1965, as amended, each provide for the making by HUD of rent supplement payments to low income tenants in properties which receive other forms of federal assistance such as Tax Credits.  The payments for each tenant, which are made directly to the owner of their property, generally are in such amounts as to enable the tenant to pay rent equal to 30% of the adjusted family income.  Some of the Apartment Complexes in which the Partnership has invested are receiving such rent supplements from HUD.  HUD has been in the process of converting rent supplement assistance to assistance paid not to the owner of the Apartment Complex, but directly to the individuals.  At this time, the Partnership is unable to predict whether Congress will continue rent supplement programs payable directly to owners of the Apartment Complex.  
As of March 31, 2003 the Fund had invested in 24 Operating Partnerships on behalf of Series 20, 14 Operating Partnership on behalf of Series 21, 29 Operating Partnerships on behalf of Series 22, 22 Operating Partnerships on behalf of Series 23, 24 Operating Partnerships on behalf of Series 24, 22 Operating Partnerships on behalf of Series 25, 45 Operating Partnerships on behalf of Series 26, 16 Operating Partnerships on behalf of Series 27, 26 Operating Partnerships on behalf of Series 28, 22 Operating Partnerships on behalf of Series 29, 20 Operating Partnerships on behalf of Series 30, 27 Operating Partnerships on behalf of Series 31, 17 Operating Partnerships on behalf of Series 32, 10 Operating Partnerships on behalf of Series 33, 14 Operating Partnerships on behalf of Series 34, 11 Operating Partnerships on behalf of Series 35, 11 Operating Partnerships on behalf of Series 36, 7 Operating Partnerships on behalf of Series 37, 10 Operating Partnerships on behalf of Series 38, 9 Operating Partnerships on behalf of Series 39, 16 Operating Partnerships on behalf of Series 40, 20 Operating Partnerships on behalf of Series 41, 17 Operating Partnerships on behalf of Series 42, 16 Operating Partnerships on behalf of Series 43 and 4 Operating Partnerships on behalf of Series 44.  A description of these Operating Partnerships is set forth in Item 2 herein.

|The business objectives of the Fund are to:
|-------------------------------------------
|(1)                                        
|(2)                                        
|(3)                                        
|(4)                                        



The business objectives and investment policies of the Fund are described more fully on pages 49 to 61 of the Prospectus, as supplemented, under the caption "Investment Objectives and Acquisition Policies," which is incorporated herein by reference.

EmployeesThe Assignor Limited Partner does not have any employees and does not perform any services.

Item 2.	Properties

The Assignor Limited Partner has no properties.

PART II

|Item | 5.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               | Market for the Fund's Interests and Related Fund Matters
|---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |                                                         
|     | (a)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | Market Information                                      
|     | The Assignor Limited Partner is a corporation with 1000 shares of common stock, all of which are owned by John Manning.  There will not be any established public trading market for
the shares as they have not been registered under the Securities Act of 1933                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |                                                         
|     | (b)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | Approximate number of security holders                  
|     | As of March 31, 2003, the Assignor Limited Partner has 40,176 BAC holders for an aggregate of 75,662,578 BACs.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |                                                         
|     | The BACs were issued in series.  Series 20 consists of 2,355
investors holding 3,866,700 BACs, Series 21 consists of 1,180
investors holding 1,892,700 BACs, Series 22 consists of 1,662
investors holding 2,564,400 BACs, Series 23 consists of 2,104
investors holding 3,336,727 BACs, Series 24 consists of 1,304
investors holding 2,169,878 BACs, Series 25 consists of 1,808
investors holding 3,026,109 BACs, Series 26 consists of 2,334
investors holding 3,995,900 BACs, Series 27 consists of 1,363
investors holding 2,460,700 BACs, Series 28 consists of 2,092
investors holding 4,000,738 BACs, Series 29 consists of 2,341
investors holding 3,991,800 BACs, Series 30 consists of 1,413
investors holding 2,651,000 BACs, Series 31 consists of 2,176
investors holding 4,417,857 BACs, Series 32 consists of 2,418
investors holding 4,754,198 BACs, Series 33 consists of 1,301
investors holding 2,636,533 BACs, Series 34 consists of 1,785
investors holding 3,529,319 BACs, Series 35 consists of 1,718
investors holding 3,300,463 BACs, Series 36 consists of 1,038
investors holding 2,106,837 BACs, Series 37 consists of 1,166
investors holding 2,512,500 BACs, Series 38 consists of 1,248
investors holding 2,543,100 BACs, Series 39 consists of 1,020
investors holding 2,292,152 BACs, Series 40 consists of 1,124
investors holding 2,630,256 BACs, Series 41 consists of 1,418
investors holding 2,891,626 BACs, Series 42 consists of 1,266
investors holding 2,744,262 BACs, Series 43 consists of 1,686
investors holding 3,637,987 BACs and Series 44 consists of 833
investors holding 1,708,836 BACs at March 31, 2003
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |                                                         
|     | (c)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | Dividend history and restriction                        
|     | The Assignor Limited Partner has no revenues and there will be no distributions of dividends.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |                                                         



Item 6.	Selected Financial Data

The Assignor Limited Partner has no operational history.



|Item 7. | Management's Discussion and Analysis of Financial
|------- | -------------------------------------------------
|        | Condition and Results of Operations              

The Assignor Limited Partner has no operational history and capital needs.

|Item 7A. | Quantitative and Qualitative Disclosure About Market Risk                                                 
|-------- | ----------------------------------------------------------------------------------------------------------
|         |                                                                                                           
|         | Not Applicable                                                                                            
|         |                                                                                                           
|Item 8.  | Financial Statements and Supplementary Data                                                               
|         |                                                                                                           
|         | The information required by this item is contained in Part IV, Item 15 of this Annual Report on Form 10-K.
|         |                                                                                                           
|Item 9.  | Changes in and Disagreements with Accountants on Accounting and Financial Disclosure                      
|         |                                                                                                           
|         | None                                                                                                      



PART III

|Item 10. | Directors and Executive Officers of the Registrant
|-------- | --------------------------------------------------
|         |                                                   
|         | (a), (b), (c), (d) and (e)                        

The Assignor Limited Partner's sole shareholder, officer and director is:

John P. Manning



Mr. Manning is the principal shareholder of C&M Management, Inc., a Massachusetts corporation which is the ultimate general partner of Boston Capital. Mr. Manning is also the principal of Boston Capital Corporation. While Boston Capital is not a direct subsidiary of Boston Capital Corporation, each of the entities is under the common control of Mr. Manning.



|(f)      | Involvement in certain legal proceedings.
|-------- | -----------------------------------------
|         |                                          
|         | None.                                    
|         |                                          
|(g)      | Promoters and control persons.           
|         |                                          
|         | None.                                    
|         |                                          
|         |                                          
|Item 11. | Executive Compensation                   
|         | (a), (b), (c), (d) and (e)

None         



|Item 12. | Security Ownership of Certain Beneficial Owners and
|-------- | ---------------------------------------------------
|         | Management                                         
|         |                                                    
|         | (a)                                                
|         |                                                    
|         |                                                    
|         |                                                    
|         |                                                    
|         | (b)                                                
|         |                                                    
|         | 100% owned by John Manning                         
|         |                                                    
|         |                                                    
|         | (c)                                                
|         |                                                    
|         | None                                               
|         |                                                    
|         |                                                    
|Item 13. |                                                    
|         |                                                    
|         | (a)                                                
|         |                                                    
|         | None                                               
|         |                                                    
|         |                                                    
|         | (b)                                                
|         |                                                    
|         | None.                                              
|         |                                                    
|         |                                                    
|         | (c)                                                
|         |                                                    
|         |                                                    
|         |                                                    
|         |                                                    
|         | (d)                                                
|         |                                                    
|         |                                                    
|         |                                                    
|         |                                                    
|Item 14. |                                                    
|         |                                                    
|         | (a)                                                
|         |                                                    
|         |                                                    
|         |                                                    
|         |                                                    
|         | (b)                                                
|         |                                                    
|         |                                                    
|         |                                                    





PART IV





|Item 15.  | Exhibits, Financial Statement Schedules, and Reports on Form 8-K                                                                                                                                
|--------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|          |                                                                                                                                                                                                 
|(a) 1 & 2 | Financial Statements and Financial Statement Schedules; Filed herein as Exhibit 13                                                                                                              
|          |                                                                                                                                                                                                 
|          | BCTC IV Assignor Corp.; filed herein as exhibit 13                                                                                                                                              
|          | Independent Auditors' Report                                                                                                                                                                    
|          |                                                                                                                                                                                                 
|          | Balance Sheet, December 31, 2003                                                                                                                                                                
|          |                                                                                                                                                                                                 
|          | Notes to Balance Sheet, December 31, 2003                                                                                                                                                       
|          |                                                                                                                                                                                                 
|          | Schedules not listed are omitted because of the absence of the conditions under which they are required or because the information is included in the financial statements or the notes thereto.
|          |                                                                                                                                                                                                 
|(b) 1     | Reports on Form 8-K                                                                                                                                                                             
|          |                                                                                                                                                                                                 
|          | None                                                                                                                                                                                            
|          |                                                                                                                                                                                                 
|          |                                                                                                                                                                                                 
|(c) 1     | Exhibits (listed according to the number assigned in the table in Item 601 of Regulation S-K)                                                                                                   

Exhibit No. 3 - Organization Documents.  
	a.	Articles of Incorporation of BCTC IV Assignor Corp.
		 (Incorporated by reference from Exhibit 3 to the 
		Fund's Registration Statement No. 33-70564 on Form S-11 as 
		filed with the Securities and Exchange Commission on October 19,
		1993.  
	Exhibit No. 10 - Material contracts.  
	a.	Beneficial Assignee Certificate.  (Incorporated by reference from
		Exhibit 10A to the Fund's Registration Statement No. 33-70564 on
		Form S-11 as filed with the Securities and Exchange Commission on
		October 19, 1993
	Exhibit No. 13 - Financial Statements.

a.	Audited Financial Statement of BCTC IV Assignor Corp., Filed herein.
	Exhibit No. 28 - Additional exhibits.
	none 
	Exhibit No. 99 - Additional exhibits.
	Certification pursuant to 18 U.S.C. Section 1350, pursuant to Section
	906 of the Sarbanes-Oxley Act of 2002, filed herein



SIGNATURES

Pursuant to the requirements of Section 13 of the Securities Exchange
Act of 1934, the Fund has duly caused this Report to be signed on its behalf
by the undersigned, thereunto duly authorized.

|                       | 
|---------------------- | 
|                      
|                       | 
|                       | 
|                       | 
|                       | 
|                       | 
|                       | 
|                       | 
|Date:  August 25, 2003 | 
|                       | 
|                       | 

Pursuant to the requirements of the Securities Exchange Act of 1934,
this report has been signed below by the following persons on behalf of the
Fund and in the capacities and on the dates indicated:

|DATE:           | SIGNATURE:          | TITLE:                                                                  
|--------------- | ------------------- | ------------------------------------------------------------------------
|                |                     |                                                                         
|August 25, 2003 | /s/ John P. Manning | Director, President (Principal Executive Officer) BCTC IV Assignor Corp.
|                | John P. Manning    
|                |                    
|                |                    
|                |                    
|                |                    
|                |                    





I, John P. Manning, certify that:

1. I have reviewed this annual report on Form 10-K of BCTC IV Assignor Corp. (the "Assignor");
2. Based on my knowledge, this annual report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this annual report;
3. Based on my knowledge, the financial statements, and other financial information included in this annual report, fairly present in all material respects the financial condition, results of operations and cash flows of the Company as of, and for, the periods presented in this annual report;
4. The Assignor's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-14 and 15d-14) for the Company and we have:



1. designed such disclosure controls and procedures to ensure that material information relating to the Assignor, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this annual report is being prepared;
2. evaluated the effectiveness of the Assignor's disclosure controls and procedures as of a date (the "Evaluation Date") within 90 days prior to the filing date of this annual report; and
3. presented in this annual report our conclusions about the effectiveness of the disclosure controls and procedures based on our evaluation as of the Evaluation Date;



1. The Assignor's other certifying officer and I have disclosed, based on our most recent evaluation, to the Assignor's auditors and the audit committee of the Assignor's board of directors (or persons performing the equivalent function):



1. all significant deficiencies in the design or operation of internal controls which could adversely affect the Assignor's ability to record, process, summarize and report financial data and have identified for the Assignor's auditors any material weaknesses in internal controls; and
2. any fraud, whether or not material, that involves management or other employees who have a significant role in the Assignor's internal controls; and



1. The Assignor's other certifying officer and I have indicated in this annual report whether or not there were significant changes in internal controls or in other factors that could significantly affect internal controls subsequent to the Evaluation Date, including any corrective actions with regard to significant deficiencies and material weaknesses.



|Date:  August 25, 2003 | /s/ John P. Manning 
|---------------------- | --------------------
|                       | John P. Manning     
|                       | Director, President 
|                       | (Principal Executive
|                       | Officer), BCTC IV   
|                       | Assignor Corp.;