Service Computation Date and Military Buyback: How SCD-Retirement Changes

What SCD-Retirement Actually Controls

Your Service Computation Date for retirement (SCD-Retirement) is the single date that determines how many years of creditable federal service you have accumulated. OPM uses it to calculate your annuity, determine your retirement eligibility, and apply the correct multiplier to your pension formula.

When you complete a military service deposit, your SCD-Retirement moves backward by the length of your credited military service. That shift changes everything downstream: your total years in the annuity formula, whether you hit the 20-year threshold for the 1.1% FERS multiplier at age 62, and potentially your earliest eligibility date for an unreduced retirement.

SCD-Retirement vs. Other SCDs

Federal employees have multiple service computation dates, and they do not always move together. The three you will encounter most:

SCD-Retirement: Determines retirement eligibility and annuity computation. This is the one that changes when you complete a military deposit.

SCD-Leave: Determines your annual leave accrual rate (4, 6, or 8 hours per pay period). Military service is typically credited toward leave regardless of whether you complete the buyback deposit — it was credited when you were hired under veterans' preference or VEOA appointment authority.

SCD-RIF (Reduction in Force): Used to calculate your retention standing during a RIF. Also may differ from your retirement SCD.

The common confusion: employees see military time reflected in their leave SCD and assume it is also credited for retirement. It is not — not until the deposit is paid in full. Your SCD-Leave can show 24 years of service while your SCD-Retirement shows only 20 because the military years are not credited for retirement purposes without a completed deposit.

How the Date Shifts

The math is straightforward. If your SCD-Retirement is currently January 15, 2010, and you buy back 4 years and 3 months of active-duty military service, your new SCD-Retirement becomes October 15, 2005. You now have 4 years and 3 months of additional creditable service for retirement purposes.

OPM calculates service time using a 30-day-month convention (360-day year). Each complete month of military service counts as one month toward your SCD. Partial months of 16 days or more round up to a full month; 15 days or fewer are dropped.

Your HR specialist updates the SCD-Retirement in your personnel records after verifying the Paid-in-Full letter and the certified SF 3108/SF 2803. This update should also appear on your Leave and Earnings Statement within one or two pay periods.

Why SCD-Retirement Matters for FERS Eligibility

FERS retirement eligibility depends on combinations of age and years of service. Here are the main categories:

• Immediate, unreduced: Age 62 with 5 years, MRA with 30 years, or age 60 with 20 years
• MRA+10: MRA with at least 10 years of service (annuity reduced by 5% per year under 62)
• Early retirement (VERA): Age 50 with 20 years, or any age with 25 years (only during agency-offered early-out windows)

If your civilian service alone puts you at 17 years and you are approaching age 60, buying back 3+ years of military service could qualify you for an immediate, unreduced annuity at 60 with 20 years instead of waiting until 62 with only 5 years required. That is potentially two extra years of collecting your full pension.

Similarly, if you are nearing your Minimum Retirement Age with 27 years of civilian service, 3 years of military buyback pushes you to 30 — qualifying you for an immediate, unreduced MRA+30 retirement.

Verifying Your Updated SCD

After your HR specialist processes the Paid-in-Full letter and updates your records, verify the change in three places:

1. Leave and Earnings Statement (LES): Your SCD-Retirement field should reflect the earlier date.
2. Electronic Official Personnel Folder (eOPF): The Standard Form 50 (Notification of Personnel Action) in your eOPF should be updated or a corrected SF-50 should be issued.
3. GRB Platform or retirement estimate: If your agency uses the Government Retirement Benefits platform, request a new retirement estimate that reflects the updated SCD. Compare the before and after annuity projections to confirm the military years are credited.

Do not assume the update happens automatically across all systems. Payroll databases, HR personnel systems, and retirement estimation tools sometimes operate on different update cycles. If your LES shows the updated SCD but GRB still shows the old date, contact your benefits specialist to force a sync.

The SCD Trap to Watch For

Some agencies display an SCD-Retirement on their HR portals that already includes military service — before the deposit is paid. The Government Retirement Benefits platform has been known to project annuities assuming the military buyback is complete when it is not.

This creates a dangerous false sense of security. An employee sees "SCD-Retirement: 2005" on their portal, assumes everything is credited, and does not discover until their final retirement estimate that the military years were projected, not actual. If the deposit is not paid by separation, OPM recalculates using only civilian service years, and the annuity drops.

Always verify with your HR specialist whether your displayed SCD-Retirement is the official, paid-and-posted date or a projected date that assumes buyback completion. The distinction is the difference between a guaranteed annuity and a reduced one.

The Military Buyback Guide for Federal Employees includes a verification card for confirming your SCD-Retirement across all agency systems, plus the specific questions to ask your benefits specialist to ensure nothing is projected that should be verified.

See more United States guides →