Most federal employees have seen a Service Computation Date, or SCD, on an SF-50. Because that date often resembles the day they began federal service, it is easy to assume it is also the date that determines when they can retire.
That assumption can cause problems. Federal employees can have different SCDs for different purposes, and the date in Block 31 of an SF-50 is generally the SCD used for annual leave accrual. It is not necessarily the date the Office of Personnel Management (OPM) will use to determine retirement eligibility or calculate a federal annuity.
For an employee planning to retire, the important questions are not simply, “What is my SCD?” They are: Which SCD am I looking at, what service does it include, and will that same service count under federal retirement rules?
What Is a Service Computation Date?
OPM defines an SCD as an actual or constructed date used to determine benefits. It is generally based on the amount of creditable federal service an employee has completed. When an employee has breaks in service or receives credit for an earlier period of service, the government may construct an SCD by combining the creditable periods and working backward from a later appointment date.
An earlier SCD generally represents more creditable service. But an SCD has meaning only in relation to the benefit for which it was calculated. Service that counts for one purpose does not necessarily count for another.
OPM identifies four principal types of SCD:
- Leave SCD
- Retirement SCD
- Thrift Savings Plan (TSP) SCD
- Reduction-in-force (RIF) SCD
The four dates may be identical for an employee with one continuous period of civilian service covered by the same retirement system. They can diverge when the employee has military service, earlier temporary or nondeduction service, refunded retirement contributions, extended periods in a nonpay status, breaks in service or other special circumstances.
OPM provides an overview of the four dates in its Service Computation Date quick guide.
The Four SCDs at a Glance
| SCD | What It Affects | Why It May Differ |
|---|---|---|
| Leave | The rate at which an employee accrues annual leave | May include military or other service that does not count toward retirement |
| Retirement | Retirement eligibility and the amount of creditable service used in the annuity | Uses the service-credit rules of CSRS or FERS |
| TSP | Vesting in Agency Automatic (1%) Contributions and associated earnings | Uses separate TSP vesting rules |
| RIF | The length-of-service component of retention standing in a reduction in force | May be adjusted by additional credit for performance |
The Date in Block 31 of Your SF-50 Is Usually Your Leave SCD
The leave SCD determines the rate at which most full-time federal employees earn annual leave. Employees with fewer than three years of creditable service generally earn four hours per biweekly pay period. Those with at least three but fewer than 15 years generally earn six hours per pay period, with 10 hours in the final full pay period of the calendar year. Employees with at least 15 years generally earn eight hours per pay period.
The leave SCD normally appears in Block 31 of the SF-50, Notification of Personnel Action. OPM’s Guide to Processing Personnel Actions, Chapter 6, explains how agencies determine creditable service for leave accrual.
This date can be useful when reviewing a personnel record, but it should not be treated as conclusive evidence of retirement service. OPM has expressly noted that an employee’s SCD for retirement may differ from the SCD used for annual leave.
Why Military Service Can Produce Two Different Dates
Military service is a common reason for a difference between the leave and retirement SCDs. Qualifying active-duty service may count toward annual leave accrual without the employee making a military service deposit. For that same post-1956 military service to count toward a FERS retirement, however, the employee generally must pay the required deposit.
Additional restrictions apply when an employee receives military retired pay, although there are exceptions. Employees with military service should have their agency determine separately whether the service counts for leave and whether it counts for retirement. OPM explains the leave rules in its annual-leave service-credit guidance and the retirement rules in Chapter 22 of the CSRS and FERS Handbook.
Planning Scenario: Military Service Is in the Leave SCD but Not the Retirement Record
Suppose a FERS employee has four years of prior active-duty military service. The agency credited those four years when establishing the employee’s leave SCD, but the employee has not made the military deposit required for retirement credit.
The employee may move into the six- or eight-hour annual-leave category earlier because of the military service. That does not mean the same four years will automatically count toward FERS retirement eligibility or the annuity. If the employee plans a retirement date using only Block 31 of the SF-50, the projected service total could be overstated by four years.
The cause is not an error in the leave SCD. The two programs are applying different service-credit rules.
What the Retirement SCD Affects
The retirement SCD represents service creditable under the applicable retirement system. It is used to help determine whether an employee has enough service to qualify for retirement and how much service will be used in the annuity calculation.
Under regular FERS retirement rules, an employee generally qualifies for an immediate retirement at one of the following combinations:
- Minimum Retirement Age (MRA) with 30 years of service
- Age 60 with 20 years of service
- Age 62 with five years of service
- MRA with at least 10 years of service, subject to a possible age reduction
Special rules apply to employees such as law enforcement officers, firefighters, air traffic controllers and certain other groups. Involuntary, early, disability, deferred and postponed retirements also have their own requirements.
OPM lists the regular age-and-service combinations on its FERS retirement eligibility page.
Planning Scenario: The Employee Is Just Short of MRA+30
Consider an employee who reaches MRA and believes the leave SCD shows exactly 30 years of service. During a retirement review, the agency determines that several months included for leave purposes are not creditable for retirement.
The expected outcome was an immediate, unreduced retirement under the MRA+30 provision. If the employee actually has fewer than 30 years of retirement-creditable service, that provision is not yet available. Depending on the complete record, the employee may need to continue working, qualify under another retirement provision or consider a reduced or postponed benefit.
A difference of only a few months can therefore change more than the size of the annuity. It can change whether the employee is eligible to retire under the provision being planned.
How Service Credit Can Be Lost, Restored or Treated Differently
Earlier Civilian Service Without Retirement Deductions
Some employees previously worked in temporary or other appointments during which retirement deductions were not withheld. Under FERS, certain nondeduction civilian service performed before 1989 may become creditable if the employee pays a deposit. With limited exceptions, nondeduction service performed after 1988 cannot be made creditable by paying a FERS deposit.
That is why an employee should not rely on the label “temporary service” alone. The dates of the service, the retirement coverage and whether deductions were withheld all matter. OPM summarizes these rules on its FERS creditable-service page.
Refunded FERS Contributions
An employee who left federal service may have received a refund of FERS retirement deductions and later returned to federal employment. Under current FERS rules, that earlier refunded service generally can count when determining eligibility for retirement. But if the employee does not pay the redeposit, the refunded period generally will not be counted as service in the annuity formula, even though earnings from that period may still factor into the high-3 average salary.
This creates an important distinction: a period of service can count toward the employee’s right to retire, and toward the salary used in the calculation, without counting toward the years of service used in the annuity formula.
For example, an employee could have 30 years for purposes of MRA+30 eligibility but receive an annuity calculated on fewer years of service because a redeposit for refunded service was not paid. OPM explains the result in its guidance for former employees and its FERS refund fact sheet.
Extended Leave Without Pay
Leave without pay does not always move an employee’s SCD. An aggregate of up to six months of nonpay status in a calendar year is generally creditable for retirement and annual-leave accrual purposes. When nonpay status exceeds six months in the same calendar year, the excess generally is not creditable and the applicable SCD must be adjusted.
Planning Scenario: Eight Months of LWOP
Suppose an employee spends an aggregate of eight months in leave-without-pay status during one calendar year. The first six months generally remain creditable. The two months above that limit generally do not.
The effect is that the employee’s service date may move forward by approximately two months. If the employee was planning to separate on the exact day they expected to reach 20 or 30 years, that adjustment could delay eligibility under the intended retirement provision.
OPM describes the treatment of nonpay status in its fact sheet on extended LWOP and other nonpay status.
Breaks in Federal Service
Earlier creditable service does not disappear merely because an employee leaves and later returns to the government. The agency must identify and combine each creditable period. The time between federal appointments, however, is not federal service and normally does not count.
An employee with a break in service should make sure the agency has records of every earlier appointment and separation. Missing personnel records can produce an incomplete service history even when the earlier employment itself should be creditable.
Why One Month Can Have an Outsized Effect at Age 62
The standard FERS annuity formula is generally 1% of the employee’s high-3 average salary multiplied by years and months of creditable service. If an employee retires at age 62 or older with at least 20 years of service, the multiplier generally increases to 1.1%.
That higher multiplier applies to all the service used in the regular FERS calculation, not merely to the years above 20.
Planning Scenario: 19 Years and 11 Months Versus 20 Years
Assume an employee is age 62 with a $100,000 high-3 average salary. For simplicity, the examples below do not include a survivor election, insurance premiums, taxes or other adjustments.
| Creditable Service | Illustrative Formula | Approximate Annual Annuity |
|---|---|---|
| 19 years, 11 months | 1% × $100,000 × 19.9167 | $19,917 |
| 20 years | 1.1% × $100,000 × 20 | $22,000 |
In this simplified example, reaching 20 years increases the annual annuity by approximately $2,083. Most of that difference results from qualifying for the 1.1% multiplier on the entire 20-year period.
This is why an employee close to the age-62-and-20-year threshold should verify the service record before committing to a separation date. OPM provides the governing formulas on its FERS annuity computation page.
Unused Sick Leave Does Not Establish Retirement Eligibility
Unused sick leave can increase the service used to calculate a FERS annuity when an employee retires on an immediate annuity. It cannot be used to meet the initial age-and-service requirement for retirement.
OPM first determines whether the employee is entitled to retire based on actual creditable service. Only after that entitlement is established is unused sick leave added for annuity-computation purposes.
Planning Scenario: Sick Leave Cannot Supply the Missing Months
Suppose an employee reaches age 60 with 19 years and 10 months of actual creditable service and has the equivalent of six months of unused sick leave.
The employee cannot combine the sick leave with the 19 years and 10 months to meet the age-60-and-20-year eligibility requirement. The employee generally must complete the missing period of actual creditable service before retiring under that provision. Once the employee qualifies for retirement, the unused sick leave can be considered in the annuity computation.
OPM addresses the sequence of determining eligibility and then adding sick leave in Benefits Administration Letter 18-103.
Your Retirement SCD and High-3 Are Different Parts of the Calculation
The retirement SCD and high-3 average salary are related to the annuity, but they measure different things. Creditable service supplies the years and months used in the formula. The high-3 is the highest average basic pay an employee earned during any three consecutive years of creditable civilian service.
Correcting an SCD does not automatically change the employee’s high-3 period. Likewise, a high-3 estimate does not prove that every period in an employee’s service history is creditable for retirement.
The TSP SCD Determines Vesting, Not FERS Retirement Eligibility
For FERS employees, the TSP SCD is primarily used to determine when Agency Automatic (1%) Contributions and their associated earnings become vested. Most FERS employees become vested after three years of qualifying service. Certain employees, including some congressional and noncareer positions, have a two-year requirement.
An employee is always vested in their own TSP contributions and attributable earnings. Agency Matching Contributions and their attributable earnings are also vested when deposited. The TSP vesting period applies to Agency Automatic (1%) Contributions and the earnings associated with them.
Planning Scenario: Separating Before TSP Vesting
If an employee subject to a three-year vesting requirement separates before completing that period, the employee may forfeit the Agency Automatic (1%) Contributions and associated earnings. The employee does not lose their own contributions or amounts that are already vested.
The employee should verify the TSP SCD rather than assuming the leave or retirement SCD controls. The Federal Retirement Thrift Investment Board explains the requirements in its TSP vesting guidance.
The RIF SCD Does Not Add Years to Your Retirement
In a reduction in force, an agency considers tenure, veterans’ preference, length of service and performance when determining retention standing. An employee can receive additional retention credit based on qualifying performance ratings, up to a maximum of 20 years. The agency uses that credit to establish an adjusted RIF SCD for the retention register.
Those additional years are for RIF competition only. They do not become federal service, make the employee eligible to retire sooner or increase a FERS or CSRS annuity.
For example, an employee might receive 15 years of additional performance credit for RIF purposes. The adjusted RIF SCD could improve the employee’s position relative to other employees in the same retention subgroup, but it does not add 15 years to the employee’s retirement record. OPM explains the retention factors in its RIF guidance.
How to Verify Your Retirement Service Before Choosing a Date
Employees should begin reviewing their service history well before retirement, especially if they have military service, a break in federal employment, temporary service, refunded contributions or a lengthy period of LWOP.
- Locate your latest SF-50, but recognize that Block 31 generally shows the leave SCD.
- Gather SF-50s documenting earlier appointments, transfers and separations.
- Identify periods when retirement deductions were not withheld from your pay.
- Determine whether you ever received a refund of CSRS or FERS deductions.
- Gather DD-214s and records of any military service deposit.
- Review extended periods of LWOP or other nonpay status.
- Ask your agency benefits office for a retirement estimate based on verified creditable service.
- Ask whether the retirement service used in the estimate differs from the leave SCD on your SF-50.
- Resolve deposit, redeposit and missing-record questions before selecting a final separation date.
- Keep copies of the service history, estimate and supporting records.
An employee could ask the benefits office the following:
Please confirm my creditable civilian and military service for both retirement eligibility and annuity computation. Please identify any service requiring a deposit or redeposit and explain any difference between my leave SCD and retirement service.
Employees who believe a date is wrong should start with their agency human resources or retirement benefits office and provide the underlying records. Waiting until the retirement application reaches OPM can delay processing and may reveal that the selected retirement date was based on service that does not count as expected.
The Bottom Line
The SCD in Block 31 of an SF-50 is generally a leave date, not a guarantee of retirement eligibility. Leave, retirement, TSP and RIF rules can credit the same period of service differently.
For employees far from retirement, an incorrect assumption about an SCD may remain unnoticed for years. For someone approaching MRA+30, age 60 with 20 years or age 62 with 20 years, even a small difference can affect the retirement provision, the separation date or the annuity formula.
The safest approach is to verify each period of creditable service with the agency benefits office before making an irrevocable retirement decision. The date that controls is not necessarily the one that is easiest to find.