Application to Make Service Credit Payment 

Federal Employees Retirement System 

Retirement System 

To avoid a delay in processing your claim:1. Read the attached information carefully.2. Type or print in ink.3. Complete Part A in full. If you are currently a Federal employee,

 have your employing agency complete Part B.

Federal Employees 

Part A. To be Completed by the Applicant

1. Name (Last, first, middle) 2. List other names you have used

5. Department or agency in which presently or last employe

including bureau, branch, or division 

4.

7. Location of employment (city and state) 

9. Have you previously filed any application under the Federal Employees Retirement System (FERS)

or the Civil Service Retirement System (CSRS)?

9a. Type of application

10. I am applying to make a service credit payment for: 

Yes, complete items 9a and 9b No Return of excess deductions

Service credit payment

RetiremRefund

Address (Number and street) (City, state and ZIP Code)

Civilian Service (Complete item 10) Military Service (Go to item 11)

List below in chronological order all periods of Federal civilian service. Be sure all your service is listed so that the Office of Personnel Management (OPM) can bill y

Check whether deduct

withheld, withheld and 

withheld and remain t

Department or Agency Title of Position

(including bureau, branch or division where 

employed)

Location of Employment 

(city and state)

 Periods of Service

Beginning Date 

(mm/dd/yyyy)

Ending Date 

(mm/dd/yyyy)

11. Are deductions for the Federal Employees Retirement System now being withheld from your salary? 12. Give the date of separation from your last 

position under the Federal Employees Retirement System 

13. Signature of applicant 14. Telephone number (including area code) 

where you can be reached during the day 

Yes (Go to item 13) No (Go to item 12)

( ) 

Not Withheld Withheld an

Refunded 

15. E-mail a

U.S. Office of Personnel Management CSRS/FERS Handbook for Personnel and Payroll Offices 
Part B. To be Completed by the Employing Agency 

Instructions to the Agency - Do not use this application to verify service for leave, retention or other non-retirement purposes. Procedures for 

verifying service and establishing creditability of service are contained in the CSRS (Civil Service Retirement System)/FERS (Federal 

Employees Retirement System) Handbook for Personnel and Payroll Offices. If more space is needed for the information requested below, 

please attach a separate sheet. Show the name and Social Security Number of the applicant on the separate sheet (SF 3107-1 may also be 

used for this purpose). 

1. Did this employee elect to transfer to FERS? No Yes Effective date of election (mm/dd/yyyy) 

2. From verified service documented in official personnel records, list all Federal civilian service performed (including current service) and the

 retirement system under which it was performed (FERS, CSRS, CSRS-Offset, FICA).

Agency Retirement System Periods of Service 

Beginning Date

(mm/dd/yyyy)

Ending Date

(mm/dd/yyyy)

3. Civilian Service Not Under FERS or CSRS 

From verified service documented in official personnel records, list any Federal civilian or District of Columbia Government service not covered 

by FERS or CSRS deductions which you believe is potentially creditable. If a period of service was subject to another retirement system for 

Federal employees, note this in the Leave Without Pay column. If total basic salary earned for any such period of service is known, a 

summary entry may be entered on the right-hand side below. For periods of non-deduction service spanning 1999 and 2000, separate entries 

for those years need to be entered if providing earnings in these columns. Otherwise, show each change affecting basic salary during the 

period of service. List any period of nondeduction service claimed on the front of this form which cannot be verified from official records and 

note it in the Leave Without Pay column as Unverified. Service which was not subject to FERS or CSRS deductions is creditable only as 

specifically allowed by law. NOTE: This information will also be requested on the SF 3107-1 in connection with the employee's retirement. File 

a copy of this schedule on the right side of the Official Personnel Folder to facilitate completion of the SF 3107-1. 

Nature of Action 

(Appt., pro., res., 

etc.) 

Effective Date 

(mm/dd/yyyy) 

Basic Salary 

Rate 

Salary Basis 

(per annum, per 

hour, WAE, etc.)* 

Leave Without 

Pay 

If Basic Salary actually earned is available, make

summary entry below 

From 

(mm/dd/yyyy) 

To 

(mm/dd/yyyy) 

Total Earned 

Comments 

* If part-time, provide the number of hours in the scheduled tour of duty and dates of each change in tour of duty. If employee claims to 

have worked more than the scheduled tour(s), provide number of hours worked at each pay rate. If intermittent (WAE), provide the 

number of hours or days worked, if available, at each pay rate. 

Certification - The information entered above is based on official records of this agency and is correct. There is no official personnel or fiscal

record in this agency of the additional service (if any) alleged by the employee and marked unverified in item 3. 

Agency address Signature Date (mm/dd/yyyy) 

Official title Email address 

Telephone number (including area code) 

( ) 

Fax number (including area code) 

( ) 

Standard Form 3108 

 Revised June 2013
Information About Service Credit Payments 

Federal Employees Retirement System 

Detach this sheet before filling out the application and save it for your records.

Read this information carefully before filling out the attached application.

Who Should Use this Application? 

You should use this application if you are covered by the Federal 

Employees Retirement System (FERS) and you want to pay for civilian 

service so that you can receive retirement credit for the service. Use this 

application even if you transferred to FERS and want to pay for service 

which will be credited under Civil Service Retirement System (CSRS) 

rules. 

If you are not currently working as a Federal employee under FERS, but 

you had been covered under FERS and had at least 5 years of paid 

creditable civilian service at the time you left FERS covered employment, 

you may also use this application to pay for additional unpaid civilian 

service that you performed. 

You should also use this application to pay a deposit for your military 

service performed after December 31, 1956, if you are currently in a 

position covered by FERS. 

If you are under the Civil Service Retirement System, use Standard Form 

2803, Application to Make Deposit or Redeposit, to apply to pay for 

service. You can obtain that application from your Human Resources 

office or from our website at www.opm.gov/forms. 

Requesting Additional Information About Past Service 

If you are currently a Federal employee and you want to know whether: 

(1) a period of service will be creditable for retirement; (2) retirement 

deductions were withheld from your pay; or (3) you received a refund for a 

period of service, ask your agency for assistance. If you decide to pay for 

some periods of service, but not others, discuss this with your agency's 

benefits office. It may be more advantageous for you to pay for certain 

periods of service instead of others. There are different types of service 

and different rules relating to how the service may be credited in 

determining when you can retire and in determining the amount of your 

annuity. If you are not currently a Federal employee, you can call the 

Office of Personnel Management (OPM) on 1-888-767-6738 (TTY: 

1-855-887-4957) Monday through Friday from 7:30 AM to 7:45 PM Eastern 

Time, or write to: 

Office of Personnel Management

Retirement Operations Center 

P.O. Box 45

Boyers, PA 16017-0045 

to ask for the information you need.

Credit for Military Service Performed After

December 31, 1956 

To make payment for military service performed after December 31, 1956, 

refer to the instructions on SF 3108A, Application to Pay Military Deposit, 

which is part of this package. Only current FERS covered employees may 

apply to pay for military deposits. 

Credit for Civilian Service 

Unless you elected to transfer to FERS under conditions that permit CSRS 

rules to apply to some of your service, your service will be subject to FERS 

service credit rules. What follows is a general overview of the FERS 

service credit rules. If you elected to transfer to FERS and are entitled to 

have CSRS rules apply to part of your FERS benefit, OPM will bill you the 

appropriate amount of deposit for the service subject to CSRS rules. You 

can obtain information about the CSRS rules and CSRS deposit rates from 

your agency's benefits office or from SF 2803, Application to Make Deposit 

or Redeposit, Civil Service Retirement System. Your agency should be 

able to provide you with a copy of that form or you can obtain it from our 

website at www.opm.gov/forms. But remember, use the SF 2803 for 

informational purposes only. 

General FERS Rules 

You can pay a civilian deposit/redeposit for: 

•  Any period of creditable civilian service performed before 1989 durin

which no retirement deductions were withheld from your pay. 

•  Any period of civilian service during which CSRS deductions wer

withheld from your pay and were then refunded to you based on an 

application you filed before you became covered by FERS, if the service 

will not be credited under CSRS rules. 

•  Certain periods of civilian service performed under other retiremen

systems for Federal employees (that is, other than CSRS or FERS). 

•  Any period of Peace Corps or VISTA volunteer service (excludin

training time) regardless of when the service was performed provided 

that it was followed by a period of creditable FERS covered service. 

•  If you were employed under FERS on or after October 28, 2009, yo

can pay a civilian redeposit for any period of service under FERS for 

which you received a refund of your retirement deductions. 

You cannot pay a civilian deposit/redeposit for: 

•  Any period of service under FERS for which you received a refund o

your retirement deductions based on an application you filed after you 

had been covered by FERS, if you were not employed under FERS on 

or after October 28, 2009 . 

•  Temporary or intermittent service which you performed after 1988

unless a deposit is allowed by a special provision of law. Temporary 

service means an appointment which is limited to one year or less. 

Intermittent service means an appointment with no scheduled tour of 

duty. 

•  Any other service which is not creditable under FER

•  Periods of leave without pay. (But a military deposit may be allowed fo

a period of leave without pay from a FERS covered position while 

serving on active military duty.) 

•  Time covered by a lump sum leave paymen

The amount of the deposit payment for most civilian service is 1.3 

percent of your basic pay for the service, plus interest. The 1.3 percent 

rate applies regardless of whether deductions would have been taken at 

that rate, if they had been taken at the time the service was performed. 

You must pay the total amount due for each separate period of service 

before you can receive credit for it in your annuity. A separate period of 

service is a period of civilian service that is not interrupted by a break in 

service of more than three days. 

If you pay for part-time service, you will receive credit for the number of 

hours in your official tour of duty - e.g. 20 hours per week. If you worked 

more than your official tour of duty, attach a statement with the name of the 

agency where you worked, the beginning and ending dates of each period 

of service, your grade and job title, and the number of hours worked per 

week. If available, attach copies of any earnings statements which show 

the number of hours worked. 

The amount of the deposit payment for Peace Corps or VISTA 

volunteer service is the percentage of your basic salary shown below, 

plus interest. 

Dates Service Was Performed Payment Rate

Before 1999 3.00%

During 1999 3.25%

During 2000 3.40%

After 2000 3.00%
If you are repaying a refund of FERS deductions, paying a deposit for 

certain non-covered service that became subject to mandatory Social 

Security tax as the result of the Social Security Amendments of 1983, 

or you are repaying a refund of deductions for CSRS Offset service 

which will be credited as FERS service, or you are waiving credit for 

service under the Foreign Service Pension System or the Federal 

Reserve Board's Bank Plan, in order to credit the service under FERS, 

the amount of the deposit or redeposit payment is the amount that would 

have been deducted from your salary under FERS, plus interest. The 

deduction rate for most FERS service is listed below. For some service 

subject to special retirement provisions, however, the deduction rate is 

0.5% higher than the rate shown in the chart. 

Dates Service Was Performed Payment Rate

Through 12/31/87 1.3%

1/1/1988 - 12/31/1989 .94%

1/1/1990 - 12/31/1998 .8%

1/1/1999 - 12/31/1999 1.05%

1/1/2000 - 12/31/2000 1.2%

After 2000 .8%

Interest is computed from the midpoint of each period of service included in 

the computation, or from the date the refund was paid. Interest accrues 

annually on the outstanding balance, and is compounded annually until the 

outstanding balance is deposited. Interest is charged to the date of 

deposit/redeposit or commencing date of annuity, whichever is earlier. 

(Interest on Peace Corps/ VISTA service credit deposit begins to accrue on 

October 1, 1995, or 2 years after the date you first became a Federal 

employee, whichever is later.) 

Interest is charged at the following rates:

Before 1948 4% 

1948 - 1984 3% 

1985 - Present A variable rate determined by the Department of

Treasury. The variable rate for any year equals the

overall average yield to the fund from retirement

securities during the preceding fiscal year. 

Payment is optional. You do not have to pay if you do not want to do so. 

•  If you were employed under FERS on/after October 28, 2009 and d

not pay a redeposit for a period of refunded FERS service or a deposit 

for refunded CSRS service that is being credited under FERS rules, 

you will not receive credit for it in the computation of your annuity, 

however, you will receive credit toward your eligibility to receive an 

annuity and computing your average salary. If you were not employed 

under FERS on/after October 28, 2009, you cannot pay a redeposit for 

a period of refunded FERS service and the service will not be used to 

compute your benefit, toward your eligibility to receive an annuity or in 

computing your average salary. 

•  If you were not employed under FERS on/after October 28, 2009, an

do not pay a deposit for a period of refunded CSRS service that is 

being credited under FERS rules, you will not receive any credit for it 

toward retirement, including your eligibility to receive an annuity and 

computing your average salary. 

•  If you do not pay for a period of FERS service where no FER

deductions were withheld from your pay, you will not receive any credit 

for it toward retirement, including your eligibility to receive an annuity 

and computing your average salary. 

Payment for civilian service can be made by - 

•  You while you are employed by the Federal government and covere

by the Federal Employees Retirement System (FERS). 

•  You when you retire. The Office of Personnel Management (OPM) wil

automatically compute any amount payable when you retire and give 

you an opportunity to pay it. 

•  You, after you leave the Federal government, provided you are eligibl

for a deferred annuity because you have at least five years of paid 

civilian service when you leave. If you are not eligible for a deferred 

annuity, but you have at least 5 years of combined paid and unpaid 

civilian service, you may pay a deposit for the unpaid service provided 

you apply before leaving FERS covered service. 

Your surviving spouse if you die as an employee or separated 

employee and your spouse is eligible for a survivor annuity benefit. 

OPM will automatically compute any amount payable and give your 

spouse an opportunity to pay it.

Payment by you or your spouse must be completed before final processing 

of retirement or survivor benefits. 

Payment cannot be withdrawn unless (1) you become eligible for and 

obtain a refund of all your FERS retirement deductions, or (2) you retire and 

are eligible to choose an alternative annuity and lump sum payment 

of your retirement deductions. If you make payment, and later receive a 

refund, you cannot redeposit the money again. This applies to refunds of 

payments for both civilian and military service. If you do not complete 

payment for a period of service before your annuity begins, OPM will refund 

the partial payment, plus interest, at the time of retirement. 

How to Apply and Make Payment 

If you are a Federal employee, send your completed application to your 

department or agency because they must certify it. Please do not file an 

application if you plan to retire within six months. OPM will give you an 

opportunity to make payment when it computes your annuity. 

If you are not currently a Federal employee, send your completed 

application directly to: 

Office of Personnel Management

Retirement Operations Center 

P.O. Box 45

Boyers, PA 16017-0045. 

Instructions for making payment, together with a bill for the amount due, 

will be sent to you as soon as OPM processes your application. 

Installment payments of at least $50.00 are acceptable. However, since 

interest is charged on the unpaid balance, you have to pay additional 

interest if you make installment payments. 

Direct Debit Payments can be made from your checking or savings 

account. If you want to authorize direct debit payments, complete form RI 

16-28, Authorization for Direct Payments, which is found on our website at 

www.opm.gov/forms. If you prefer, you can call us on 1-888-767-6738 

(TTY: 1-855-887-4957) and we'll send you a copy of this form. 

Additional Information and assistance in completing this application may 

be obtained from your human resources office. If this source of information 

is not available to you, you can call OPM on 1-888-767-6738 (TTY: 

1-855-887-4957) Monday through Friday from 7:30 AM to 7:45 PM Eastern 

Time. If you prefer, you can write to: 

Office of Personnel Management

Retirement Operations Center 

P.O. Box 45

Boyers, PA 16017-0045 

Privacy Act Statement 

Title 5, U.S. Code, Chapter 84, authorizes the solicitation of this 

information. The data you furnish will be used to determine your eligibility 

to make payments for retirement credit to the Civil Service Retirement 

Fund, to identify records properly associated with your application, to obtain 

additional information if necessary, and to maintain a uniquely identifiable 

claim file. 

The information may be shared and is subject to verification via paper, 

electronic media, or through the use of computer matching programs, with 

national, state, local, or other charitable or social security administrative 

agencies to determine benefits under their programs. It may also be 

shared and verified as noted above with law enforcement agencies when 

they are investigating a violation of civil or criminal law. 

Executive Order 9397 (November 22, 1943) authorizes the use of the 

Social Security Number. Failure to furnish the requested data will delay or 

prevent action on this application. 

Public Burden Statement 

We estimate this form takes an average of 30 minutes per response to 

complete including the time for reviewing the completed form. Send 

comments regarding our estimate or any other aspect of this form, 

including suggestions for reducing completion time, to the Office of 

Personnel Management, Retirement Services Publications Team, 

(3206-0134), Washington, DC, 20415-3430. The OMB number, 

3206-0134, is currently valid. OPM may not collect this information, and 

you are not required to respond, unless this number is displayed. 
Application To Pay Military Deposit

For Military Service Performed After December 31, 1956

You must be currently employed and covered under FERS to make the military deposit. You must complete the 

deposit in full before the separation on which your retirement benefit will be based.

Agency Use Only (To Be Completed By Agency HR Office) 

Employee's Name Date of Birth (mm/dd/yyyy) Social Security Number 

To Be Completed By Employee

1. Information About Employee's Military Service

2. Employee's Acknowledgment of Understanding of Military Service Credit and Deposit Rules

Branch of Military Period of Service

Beginning Date 

(mm/dd/yyyy) 

Ending Date 

(mm/dd/yyyy) CSRS FERS

Retirement System 

Rules That Apply 

to the Service 

(Check appropriate box)

Does Alternative Deposit 

Calculation Under 

USERRA Apply? 

(Check appropriate box)

Interest 

Accrual 

Date 

(IAD) 

(mm/dd/yyyy) Yes No

Certification: The information entered above is based on official records of 

this agency and is correct.

Agency Official Signature Date (mm/dd/yyyy) 

I am currently employed in a position where deductions for the Federal Employees Retirement System (FERS) are being deducted from my 

salary, and I wish to pay the deposit necessary to obtain credit for my military service after 1956. I understand that I must pay the entire 

deposit to my employing agency before separation for retirement. I further understand that the military deposit cannot be deemed paid at 

retirement if I am eligible for and elect an alternative annuity. If I do elect the alternative annuity upon retirement, any completed military 

deposits made to the Fund will be refunded to me along with any other retirement contributions or payments I made to the Fund. Once I 

complete the deposit in full, I understand that it can only be refunded to me if I become eligible for a refund of my retirement contributions or 

retire without waiving my military retired pay (if any). 

I understand that for any given full period of military service that I have performed, if I do not complete the deposit for that full period of military 

service, any payments I made that were applied to that full period of military service will be refunded to me when I retire or when I become 

eligible for a refund of my retirement contributions. I also understand each of the following service credit rules and how they apply to any given 

full period of military service that I have performed for which I have not completed the military deposit: 

•  For each period of military service performed after 1956 that is subject to FERS rules, the post-1956 military service will not be used t

compute or establish title to a FERS annuity if I do not complete the deposit before I separate for retirement. 

•  For each period of military service performed after 1956 that is subject to Civil Service Retirement System (CSRS) rules in a CSR

component of my FERS annuity:

 If the first time I worked in a position where CSRS deductions were withheld from my salary was on or after October 1, 1982, the 

post-1956 military service will not be used to compute or establish title to a FERS annuity if I do not complete the deposit before I 

separate for retirement. 

 If the first time I worked in a position where CSRS deductions were withheld from my salary was before October 1, 1982, the 

post-1956 military service will not be used to compute my annuity at age 62 (or when I retire, if I retire after age 62), if I am eligible 

for Social Security benefits at that time. 

Finally, I understand that payment of this deposit will not make my military service creditable if it is otherwise not creditable under FERS or 

CSRS. I realize that the Office of Personnel Management (OPM) is solely responsible for adjudicating and administering civil service retirement 

benefits. I understand that OPM will determine if my military service can be credited in my FERS retirement when I apply for my retirement 

benefits. 

Employee's Signature Telephone number where you can be E-mail address Date (mm/dd/yyyy)

reached during the day

( ) 

 Standard Form 3108A 

 June 2013
Information For Employee

Employee Instructions for Applying to Pay Post-1956 Military Service Deposit 

•  Complete sections 1-11 on the front of the SF 3108, Application to Make Service Credit Paymen

•  Complete this form, SF 3108A, Application to Pay Military Deposit for Military Service Performed After December 31,195

•  Include a copy of your DD 214, Report of Transfer or Discharge, or equivalent record to verify your military service  If copies of the D

214 are not available, you should complete form SF 180, Request Pertaining to Military Records, and send it to the appropriate address 

(found on the form) to verify your military service. You can obtain this form from your employing agency. 

•  Attach documentation of military basic pay to this application. (See below

•  Give the completed SF 3108, SF 3108A, and documentation noted above to your employing agency  Your agency will compute th

military deposit you owe and give you instructions for paying the deposit. 

Employee Instructions for Completing this Form (SF 3108A) 

•  Complete item 1 (Information About Employee's Military Service) by providing the branch of the military in which you served (e.g. Army

Navy, etc.) and the dates of your military service. If you have more than one period of military service, make a separate entry for each 

period of military service you performed. Note, a period of military service includes consecutive periods of service where there is no 

break in service. For military purposes, a 1-day break separates service into two periods. Your agency will complete the section relating 

to the retirement system, the alternative deposit computation rules, and the interest accrual date. 

•  Read the information in item 2 and then sign and date the form, and provide a telephone number where you can be reached durin

the day, at the bottom of item 2. 

To Obtain Documentation of Military Basic Pay 

Basic pay earnings may be documented by either of the following methods:

•  Actual pay records from the military service. Your agency can tell you what military pay records are acceptable for documentin

actual military earnings.

•  Estimated earnings, if you do not have official records of military earnings for the entire period of service  To obtain these estimate

earnings from the military, use RI 20-97, Request for Estimated Earnings During Military Service. You can obtain this form from your 

employing agency or from our website www.opm.gov/forms. You must attach a copy of your DD 214 for the period of military service 

and any available records of pay and promotions. If the alternative deposit calculation under USERRA applies to a period of military 

service, you should check with your agency for special instructions for requesting estimated earnings if you received civilian pay (military 

leave, annual leave) during your period of military service. 

The following records may not be used to document earnings:

•  Earnings statements from tax records  (They include allowances as well as basic pay

•  Social Security earnings statements. (They include allowances as well as basic pay and also reflect only military basic pay earned up t

the Social Security maximum wage base for withholding.) 

Information For Employing Agency 

Agency Instructions: The employing agency (or organization designated by the agency to administer the personnel records of the 

employee) must complete the Agency Use Only section for every application before the action is processed through payroll. For each period 

of military service listed by the employee in Block 1, the employing agency must indicate which retirement plan rules are applicable to the 

particular period of service by placing a check mark in the appropriate block under Retirement System Rules. (A check mark in the CSRS 

column indicates that the military service will be credited in a CSRS component of the FERS annuity and the deposit will be computed under 

CSRS rules. A check mark in the FERS column indicates that the military service will be credited under FERS rules and that the deposit will 

be computed under FERS rules.) The agency must also indicate if the period is subject to the special comparative deposit calculation rules 

specified in the Uniformed Services Employment and Reemployment Rights Act (USERRA) of 1994, as amended, by checking the 

appropriate block (Yes or No) under the Does Alternative Deposit Calculation Under USERRA Apply? column. Do not leave that column 

blank. And, for each period of military service listed, the agency must provide the interest accrual date for the military deposit. Finally, an 

authorized agency official should sign and date the certification section.

 Reverse of Standard Form 3108A 

 June 2013