<PAGE>   1
                UNITED STATES SECURITIES AND EXCHANGE COMMISSION

                              WASHINGTON, DC 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, 1999

                                       OR

[ ]      TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934

             For the transition period from __________ to __________


                        Commission File Number 000-23849
                                               ---------

                      UNION PLANTERS MORTGAGE FINANCE CORP.
             (Exact name of registrant as specified in its charter)


           Delaware                                        62-1712370
-------------------------------                ---------------------------------
(State or other Jurisdiction of                (IRS Employer Identification No.)
Incorporation or Organization)

                      Union Planters Administrative Center
                           7130 Goodlett Farms Parkway
                            Cordova, Tennessee 38018
             ------------------------------------------------------
                    (Address of principal executive offices)

       Registrant's telephone number, including area code: (901) 580-6000
                                                           --------------

        Securities registered pursuant to Section 12(b) of the Act: None
                                                                    ----

 Securities registered pursuant to Section 12(g) of the Act: Common Stock, par
                                                             -----------------
                              value $0.01 per share
                              ---------------------

Indicate by check mark whether the Registrant (i) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such short period that the Registrant was
required to file such report), and (ii) has been subject to such filing
requirements for the past 90 days:

                                 Yes [X] No [ ]

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K (ss.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. [X}

Aggregate market value of voting stock held by nonaffiliates of the Registrant
as of the latest practicable date, December 31, 1999: NONE

As of January 31, 2000, the latest practicable date, there were 1,000 shares of
Union Planters Mortgage Finance Corp. common stock outstanding, all of which are
owned by Union Planters Bank, National Association.

The registrant meets the conditions set forth in General Instruction I(1)(a) and
(b) of Form 10-K and, therefore, is furnishing the abbreviated narrative
disclosure specified in Paragraph (2) of General Instruction I.



<PAGE>   2


                                     PART I

ITEM 1--BUSINESS

         Union Planters Mortgage Finance Corp. (the "Company") was established
September 5, 1997 as a wholly owned, limited purpose, finance subsidiary of
Union Planters Bank, National Association, which in turn is a subsidiary of
Union Planters Corporation. There was essentially no business activity on the
part of the Company until May 1998. The Company was organized to facilitate the
securitization of loans and other assets through the issuance and sale of
collateralized bonds and pass-through securities through trusts established by
the Company. Securities issued through trusts will be secured primarily by
residential mortgage loans and mortgage-backed certificates of various types. In
the future, the Company may finance other types of loans and assets.

         The Company competes in a national market with other private conduits
and various financial firms. Economic conditions, interest rates, regulatory
changes and market dynamics all influence the securities market.

ITEM 2--PROPERTIES

         The Company has no physical properties.

ITEM 3--LEGAL PROCEEDINGS

         None

ITEM 4--SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

         Information in response to this Item is omitted pursuant to General
Instruction I.


                                     PART II

ITEM 5--MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS

         All of the Company's outstanding common stock is owned by Union
Planters Bank, National Association. Accordingly, there is no market for its
common stock.

ITEM 6--SELECTED FINANCIAL DATA

         Information in response to this Item is omitted pursuant to General
Instruction I.

ITEM 7--MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
        OF OPERATION

         Union Planters Mortgage Finance Corp. (the "Company") was established
September 5, 1997 as a wholly owned, limited purpose, finance subsidiary of
Union Planters Bank, National Association (the "Bank"), which in turn is a
subsidiary of Union Planters Corporation. There was essentially no business
activity on the part of the Company until May 1998. The Company was organized to
facilitate the securitization of loans and other assets through the issuance and
sale of collateralized bonds and pass-through securities through trusts
established by the Company. Securities issued through trusts will be secured
primarily by residential mortgage loans and mortgage-backed certificates of
various types. In the future, the Company may finance other types of loans and
assets.

         In February 1999, the Company securitized approximately $132 million in
principal amount of previously defaulted FHA-insured and VA-guaranteed mortgage
loans serviced by the Bank. The loans securitized had a weighted-average
maturity of 222 months and a weighted-average interest rate of 9.67% per annum.
The loans will continue to be serviced by the Bank for a one percent fee.
Affiliates of the Company purchased all of the subordinated securities


                                       2
<PAGE>   3

issued in this transaction, with an approximate market value of $9.3 million.
This securitization, treated as a sale, resulted in a gross gain of
approximately $5.4 million before costs and expenses. Securitization costs and
expenses accrued by the Company were approximately $829,000. Securitization
costs and expenses included underwriting costs, legal and accounting fees, as
well as cost to prepare, record and deliver loan documents and files. Credit
losses not covered by insurance or guarantees are absorbed by subordinated
security holders or, in limited circumstances, the Bank as servicer. Therefore,
the Company carries no loan loss reserves. Excess cash resulting primarily from
the net gain of $4.5 million resulted in declaration of a dividend payment to
the Bank of $3.0 million.

         On May 28, 1998 the Company securitized approximately $381 million in
principal amount of previously defaulted FHA-insured and VA-guaranteed mortgage
loans serviced by the Bank. The loans securitized had a weighted-average
maturity of 218 months and a weighted-average interest rate of 9.87% per annum.
The loans will continue to be serviced by the Bank for a one percent fee.
Affiliates of the Company purchased all of the subordinated securities issued in
this transaction, with an approximate market value of $17.4 million. This
securitization, treated as a sale, resulted in a gross gain of approximately
$20.1 million. Credit losses not covered by insurance or guarantees are absorbed
by subordinated security holders or, in limited circumstances, the Bank as
servicer. Therefore, the Company carries no loan loss reserves. The Company has
incurred and will continue to incur expenses associated with preparation and
maintenance of loan files and recordation of loan documents. Excess cash
resulting largely from a net gain of $17.6 million resulted in declaration of a
dividend to dividend payment to the Bank of $11.0 million.

ITEM 7A--QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISKS

         Not Applicable.

ITEM 8--FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

<TABLE>
<CAPTION>
                                                                                                           Page
                                                                                                           ----
<S>                                                                                                        <C>

AUDITED FINANCIAL STATEMENTS

UNION PLANTERS MORTGAGE FINANCE CORP.

Report of Independent Accountants........................................................................    4

Balance Sheet - December 31, 1999 and 1998...............................................................    5

Statement of Operations - For the years ended December 31, 1999 and 1998 and
the period from September 5, 1997 to December 31, 1997...................................................    6

Statement of Shareholders' Equity - For the years ended December 31, 1999 and 1998 and
the period from September 5, 1997 to December 31, 1997...................................................    7

Statement of Cash Flows - For the years ended December 31, 1999 and 1998 and
the period from September 5, 1997 to December 31, 1997...................................................    8

Notes to Financial Statements............................................................................    9
</TABLE>


                                       3
<PAGE>   4

                        REPORT OF INDEPENDENT ACCOUNTANTS



To the Board of Directors and Shareholder of Union Planters Mortgage Finance
Corp.


         In our opinion, the accompanying balance sheet and the related
statements of operations, of changes in shareholder's equity and of cash flows
present fairly, in all material respects, the financial position of Union
Planters Mortgage Finance Corp. (the "Company") at December 31, 1999 and 1998,
and the results of its operations and its cash flows for the years ended
December 31, 1999 and 1998, and the period from September 5, 1997 to December
31, 1997, in conformity with accounting principles generally accepted in the
United States. These financial statements are the responsibility of the
Company's management; our responsibility is to express an opinion on these
financial statements based on our audits. We conducted our audits of these
statements in accordance with auditing standards generally accepted in the
United States, which require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements, assessing the
accounting principles used and significant estimates made by management, and
evaluating the overall financial statement presentation. We believe that our
audits provide a reasonable basis for the opinion expressed above.




/s/ PRICEWATERHOUSECOOPERS LLP
------------------------------
Memphis, Tennessee
January 20, 2000


                                       4
<PAGE>   5

                      UNION PLANTERS MORTGAGE FINANCE CORP.
                                  BALANCE SHEET


<TABLE>
<CAPTION>
                                                              DECEMBER 31,
                                                          -------------------
                                                          1999           1998
                                                          ----           ----
                                                        (DOLLARS IN THOUSANDS)
<S>                                                     <C>              <C>

Cash ................................................     $489           $502
Deferred income taxes ...............................       45             35
                                                          ----           ----
          TOTAL ASSETS ..............................     $534           $537
                                                          ====           ====

Accrued expenses ....................................     $128           $101
Taxes payable to affiliates .........................       46             --
                                                          ----           ----
          TOTAL LIABILITIES .........................      174            101
                                                          ----           ----

Shareholder's equity
  Common stock, par value $.01 per share,
     1,000 shares authorized, issued, and outstanding       --             --
  Additional paid-in capital ........................       10             10
  Retained earnings .................................      350            426
                                                          ----           ----
          TOTAL SHAREHOLDER'S EQUITY ................      360            436
                                                          ----           ----
          TOTAL LIABILITIES AND SHAREHOLDER'S EQUITY      $534           $537
                                                          ====           ====
</TABLE>

The accompanying notes are an integral part of these financial statements.


                                       5
<PAGE>   6

                      UNION PLANTERS MORTGAGE FINANCE CORP.
                             STATEMENT OF OPERATIONS


<TABLE>
<CAPTION>
                                                    FOR THE YEARS ENDED
                                                        DECEMBER 31,       FOR THE PERIOD FROM
                                                    -------------------    SEPTEMBER 5, 1997 TO
                                                      1999        1998      DECEMBER 31, 1997
                                                      ----        ----      -----------------
                                                             (DOLLARS IN THOUSANDS)
<S>                                                  <C>         <C>       <C>
NONINTEREST INCOME
  Net gain on the sale of residential mortgages      $4,521      $17,655       $       --
                                                     ------      -------       ----------

NONINTEREST EXPENSE
  Franchise taxes .............................          --            1               --
  Professional fees ...........................          15           75               --
                                                     ------      -------       ----------
                                                         15           76               --
                                                     ------      -------       ----------

          EARNINGS BEFORE INCOME TAXES ........       4,506       17,579               --
Applicable income taxes .......................       1,582        6,153               --
                                                     ------      -------       ----------
         NET EARNINGS .........................      $2,924      $11,426       $       --
                                                     ======      =======       ==========
</TABLE>

The accompanying notes are an integral part of these financial statements.


                                       6
<PAGE>   7

                      UNION PLANTERS MORTGAGE FINANCE CORP.
                  STATEMENT OF CHANGES IN SHAREHOLDER'S EQUITY
             FOR THE YEARS ENDED DECEMBER 31, 1999, 1998 AND FOR THE
               PERIOD FROM SEPTEMBER 5, 1997 TO DECEMBER 31, 1997


<TABLE>
<CAPTION>
                                                    ADDITIONAL
                                         COMMON      PAID-IN    RETAINED
                                         STOCK       CAPITAL    EARNINGS         TOTAL
                                         ------     ----------  --------         -----
                                                    (DOLLARS IN THOUSANDS)
<S>                                   <C>           <C>         <C>            <C>

Initial capitalization on
  September 5, 1997--issuance of
  1,000 shares of $0.01 par
  value common stock ...........      $        --      $10      $     --       $     10
                                      -----------      ---      --------       --------

BALANCE, DECEMBER 31, 1997 .....               --       10            --             10

Net earnings ...................               --       --        11,426         11,426

Dividend paid ..................               --       --       (11,000)       (11,000)
                                      -----------      ---      --------       --------

BALANCE, DECEMBER 31, 1998 .....               --       10           426            436

Net earnings ...................               --       --         2,924          2,924

Dividends paid .................               --       --        (3,000)        (3,000)
                                      -----------      ---      --------       --------

BALANCE, DECEMBER 31, 1999 .....      $        --      $10      $    350       $    360
                                      ===========      ===      ========       ========
</TABLE>

The accompanying notes are an integral part of these financial statements.


                                       7
<PAGE>   8

                      UNION PLANTERS MORTGAGE FINANCE CORP.
                             STATEMENT OF CASH FLOWS


<TABLE>
<CAPTION>
                                                            FOR THE YEARS ENDED
                                                                DECEMBER 31,         FOR THE PERIOD FROM
                                                         -------------------------   SEPTEMBER 5, 1997 TO
                                                           1999             1998      DECEMBER 31, 1997
                                                         -------         ---------   --------------------
                                                                 (DOLLARS IN THOUSANDS)
<S>                                                      <C>             <C>         <C>
OPERATING ACTIVITIES
  Net earnings ....................................      $   2,924       $  11,426           $--
  Deferred income tax benefit .....................            (10)            (35)           --
  Gain on sale of loans ...........................         (4,521)        (17,655)           --
  Net increase in other liabilities ...............             73             101            --
  Costs related to sale of loans to a trust .......           (829)         (2,449)           --
                                                         ---------       ---------           ---
          Net cash used by operating activities ...         (1,534)         (6,163)           --
                                                         ---------       ---------           ---

INVESTING ACTIVITIES
  Purchase of loans from parent company ...........       (132,467)       (381,173)           --
  Proceeds from sale of loans to a trust ..........        137,817         401,277            --
  Costs related to sale of loans to a trust .......           (829)         (2,449)           --
                                                         ---------       ---------           ---
          Net cash provided by investing activities          4,521          17,655            --
                                                         ---------       ---------           ---

FINANCING ACTIVITIES
  Initial capitalization of the Company ...........             --              --            10
  Issuance of notes payable to parent company .....        132,467         383,622            --
  Repayment of notes payable to parent company ....       (132,467)       (383,622)           --
  Cash dividends paid .............................         (3,000)        (11,000)           --
                                                         ---------       ---------           ---
          Net cash used by financing activities ...         (3,000)        (11,000)           10
                                                         ---------       ---------           ---
Net increase (decrease) in cash ...................            (13)            492            10
Cash at beginning of period .......................            502              10            --
                                                         ---------       ---------           ---
Cash at end of period .............................      $     489       $     502           $10
                                                         =========       =========           ===
</TABLE>

The accompanying notes are an integral part of these financial statements.


                                       8
<PAGE>   9

                      UNION PLANTERS MORTGAGE FINANCE CORP.
                          NOTES TO FINANCIAL STATEMENTS


NOTE 1. BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

         USE OF ESTIMATES. The accounting and reporting policies of Union
Planters Mortgage Finance Corp. (the "Company") conform with generally accepted
accounting principles and general practice within the financial services
industry. The preparation of financial statements in accordance with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the amounts reported in the financial statements and
accompanying notes; actual results could differ from these estimates.

         BASIS OF PRESENTATION. The financial statements include the accounts of
the Company. The Company was established September 5, 1997 as a wholly owned,
limited-purpose finance subsidiary of Union Planters Bank, National Association
(the "Bank"), which in turn is a subsidiary of Union Planters Corporation
("UPC"). The Company was organized to facilitate the securitization of loans and
other assets through the issuance and sale of collateralized bonds and
pass-through securities through trusts established by the Company. Securities
issued through trusts will be secured primarily by residential mortgage loans
and mortgage-backed certificates of various types. These financial statements do
not include the accounts of the trusts established to carry out the issuance and
sale of collateralized bonds and pass-through securities.

NOTE 2. SALE OF LOANS

         In February 1999 and May 1998, the Company securitized approximately
$132 million and $381 million, respectively, in principal amount of previously
defaulted FHA insured and VA guaranteed mortgage loans serviced by the Bank. The
transactions were accounted for as sales in accordance with the provisions of
Statement of Financial Accounting Standards ("SFAS") No. 125, "Accounting for
Transfer and Servicing of Financial Assets and Extinguishment of Liabilities."
The following summarizes the gains:

<TABLE>
<CAPTION>
                                       FOR THE YEARS ENDED
                                           DECEMBER 31,
                                    -------------------------
                                       1999            1998
                                    ----------      ---------
<S>                                 <C>             <C>

Proceeds from sale of loans ..      $ 137,817       $ 401,277
Principal balance of loans ...       (132,467)       (381,173)
                                    ---------       ---------
          Gain ...............          5,350          20,104
Costs ........................           (829)         (2,449)
                                    ---------       ---------
          Net gain on the sale      $   4,521       $  17,655
                                    =========       =========
</TABLE>

NOTE 3. INCOME TAXES

         Income taxes are computed on a separate company basis. The Company will
file a consolidated federal income tax return with the Bank and UPC. Deferred
income taxes are provided in accordance with SFAS No. 109, "Accounting for
Income Taxes." The components of income tax expense (benefit) are as follows:

<TABLE>
<CAPTION>
                                       FOR THE YEARS ENDED
                                           DECEMBER 31,
                                    -------------------------
                                       1999            1998
                                    ----------      ---------
<S>                                 <C>             <C>
Current ..........................   $ 1,592         $ 6,188
Deferred .........................       (10)            (35)
                                     -------         -------
          Total income tax expense   $ 1,582         $ 6,153
                                     =======         =======
</TABLE>


                                       9
<PAGE>   10

         The deferred tax asset is composed of accrued expenses that have not
been paid. The Company's effective tax rate does not differ from the federal
statutory rate of 35%.

NOTE 4. RELATED PARTY

         The Company is financially dependent on the Bank to sustain its
operations, including providing loans and other assets for securitization and
sale. The Company is also financially dependent on UPC.

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

         Information in response to this Item is omitted pursuant to General
Instruction I

ITEM 11--EXECUTIVE COMPENSATION

         Information in response to this Item is omitted pursuant to General
Instruction I

ITEM 12--SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

         Information in response to this Item is omitted pursuant to General
Instruction I

ITEM 13--CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

         Information in response to this Item is omitted pursuant to General
Instruction I

                                     PART IV

ITEM 14--EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K

         (a) (1) Index to financial statements is included in Item 8.

         (a) (2) Not applicable

         (a) (3) Exhibits

         3.1      Certificate of Incorporation of the Registrant (Incorporated
                  herein by reference to the Exhibits to Registrant's
                  Registration Statement No. 333-35471 on Form S-3, filed
                  September 12, 1997).

         3.2      Amended and Restated Bylaws of the Registrant (Incorporated
                  herein by reference to the Exhibits to Pre-Effective Amendment
                  No. 3 to the Registrant's Registration Statement No. 333-35471
                  on Form S-3, filed January 16, 1998).

         4.1      Standard Terms to Pooling and Servicing Agreement (January
                  1998 Edition) (Incorporated herein by reference to the
                  Exhibits to Pre-Effective Amendment No. 3 to the Registrant's
                  Registration Statement No. 333-35471 on Form S-3, filed
                  January 16, 1998).


                                       10
<PAGE>   11

         4.2      Form of Indenture between Registrant and Trustee (Incorporated
                  herein by reference to the Exhibits to Pre-Effective Amendment
                  No. 3 to the Registrant's Registration Statement No. 333-35471
                  on Form S-3, filed January 16, 1998).

         4.3      Form of Trust Agreement between Registrant and Trustee
                  (Incorporated herein by reference to the Exhibits to
                  Pre-Effective Amendment No. 3 to the Registrant's Registration
                  Statement No. 333-35471 on Form S-3, filed January 16, 1998).

         4.4      Form of Deposit Trust Agreement between Registrant and Trustee
                  (Incorporated herein by reference to the Exhibits to
                  Pre-Effective Amendment No. 3 to the Registrant's Registration
                  Statement No. 333-35471 on Form S-3, filed January 16, 1998).

         4.5      Standard Terms to Pooling and Servicing Agreement (May 1998
                  Edition) (Incorporated herein by reference to Exhibit to the
                  Registrant's Current Report on Form 8-K , filed June 11,
                  1998).

         4.6      Copy of the Series 1998-1 Pooling and Servicing Agreement,
                  dated as of May 1, 1998, by and among the Registrant, Union
                  Planters Bank, N.A., as Master Servicer, The Bank of New York,
                  as Contract of Insurance Holder, and The Bank of New York, as
                  Trustee (Incorporated herein by reference to Exhibit to the
                  Registrant's Current Report on Form 8-K , filed June 11,
                  1998).

         4.7      Copy of Series 1999-1 Pooling and Servicing Agreement, dated
                  as of February 1, 1999, by and among the Registrant, Union
                  Planters Bank, N.A., as Master Servicer, and Contract of
                  Insurance Holder, and The Bank of New York, as Trustee
                  (Incorporated herein by reference to Exhibit to the
                  Registrant's Current Report on Form 8-K, filed March 2, 1999).

         27       Financial Data Schedule (for SEC use only)

         99.1     Form of Sales Agreement between the Registrant, as Purchaser,
                  and the Seller (Incorporated herein by reference to the
                  Exhibits to Pre-Effective Amendment No. 3 to the Registrant's
                  Registration Statement No. 333-35471 on Form S-3, filed
                  January 16, 1998).

         99.2     Form of Supplemental Servicing Agreement (Incorporated herein
                  by reference to the Exhibits to Pre-Effective Amendment No. 3
                  to the Registrant's Registration Statement No. 333-35471 on
                  Form S-3, filed January 16, 1998).

         (b)      The Registrant filed the following current reports on Form 8-K
                  for the fourth quarter of 1998:

                  None

         (c)      Exhibits

                  Please refer to Item 14(a)(3) hereinabove.

         (d)      Additional financial statements

                  (1)      Separate Financial Statements of subsidiaries not
                           consolidated and fifty-percent-or-less persons

                           None

                  (2)      Affiliates whose securities are pledged as collateral

                           None

                  (3)      Schedules

                           None


                                       11
<PAGE>   12

                                   SIGNATURES


         Pursuant to the requirements of Section 13 or 15(d) of the securities
Exchange Act of 1934, the Registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.



                                           UNION PLANTERS MORTGAGE FINANCE CORP.
                                           (Registrant)



Dated:  January 26, 2000                   By:  /s/ Joel R. Katz
        ----------------                        --------------------------------
                                           Joel R. Katz
                                           President
                                           (Principal Executive Officer)



Dated:  January 26, 2000                   By:  /s/ Mark E. Mosteller
        ----------------                        --------------------------------
                                           Mark E. Mosteller
                                           Vice President
                                           (Principal Financial Officer)



         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
Registrant and in the capacities and on the dates indicated.



/s/ Joel R. Katz                                    Dated: January 26, 2000
----------------------                                     ----------------
Joel R. Katz
Director


/s/ Mark E. Mosteller                               Dated: January 26, 2000
----------------------                                     ----------------
Mark E. Mosteller
Director


/s/ Leslie M. Stratton                              Dated: January 26, 2000
----------------------                                     ----------------
Leslie M. Stratton
Director


/s/ John E. Gnuschke                                Dated: January 26, 2000
----------------------                                     ----------------
John E. Gnuschke
Director


                                       12