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Federal service record reconciliation

Federal service computation date calculator

Estimate SCD-Leave from your current appointment, prior Federal service, verified credits, and excess nonpay—then inspect every term in the constructed-date ledger.

Rule snapshot
Primary method
OPM Chapter 6 · SF-144A
Privacy
Browser-only · no storage

Federal SCD-Leave calculation worksheet

Choose the service computation date you need.

OPM Chapter 6 · Figure 6-6

Load the official worked fixture, or reset to a blank record.

Choose the service computation date purpose
01

Choose the SCD you need

Purpose comes first because Federal leave, retirement, RIF, and TSP dates can use different credit rules.

OPM, statute, and regulation sources last reviewed . The rules are versioned locally; no government API, third-party date service, or FedUp data-platform lookup is needed.

Entries stay in this browser and are neither transmitted nor stored. This independent planning tool is not endorsed by OPM and does not replace your agency's official SF-50 or SF-144A.

Methodology

How to calculate a service computation date

A service computation date is benefit-specific. For SCD-Leave, OPM's preferred method reconstructs the date from official service periods instead of simply counting time backward from today.

  1. 01

    Choose the SCD you need

    This calculator supports SCD-Leave, the date used for annual-leave accrual. Retirement, RIF, and TSP vesting dates can use different credit rules, so those purposes stop before a date is produced.

  2. 02

    Reconcile prior civilian appointments

    Enter each prior full-time or part-time Federal civilian appointment from your records. The worksheet sorts the chronology, merges concurrent service, and identifies one-to-three-day breaks that OPM treats as continuous for SCD-Leave.

  3. 03

    Add only verified service credit

    Record military service, intermittent work, approved prior experience, and other duration-only credit only when the relevant agency, branch, or payroll record supports it. The tool never treats a military deposit as a leave-credit requirement.

  4. 04

    Account for excess nonpay

    Add only the noncreditable excess after the ordinary six-month annual limit and any protected absence have been resolved. A personal estimate is permitted, but it is labeled as an approximation rather than an agency-record reconciliation.

  5. 05

    Audit the constructed-date ledger

    The result shows every appointment, separation, inclusive ending-day credit, verified duration, and nonpay term in an SF-144A-style A-minus-B worksheet before converting the raw 30/360 result to a real calendar date.

A = appointment dates + current EOD + excess nonpay

B = separation dates + inclusive ending days + verified duration credits

Subtract B from A on OPM's 360-day service calendar, using twelve 30-day months, then apply OPM's month-end and realistic-date conversion rules. The tool shows the terms and conversion; it never silently normalizes an unresolved fact.

Purpose first

There is no single universal Federal SCD

The same employee can have different service computation dates because leave, retirement, RIF, and TSP vesting do not always credit the same periods. Only the first row is calculated here.

SCD-Leave
Annual-leave accrual category
Supported here as an estimated, auditable date
SCD-Retirement
Retirement eligibility and annuity service
Separate retirement rules; use the FERS or CSRS workflow
SCD-RIF
Retention standing in a reduction in force
Agency-established and may include performance credit
TSP-SCD
FERS TSP vesting
Separate vesting date; not calculated on this page

Official worked example

OPM Figure 6-6 reconciles to August 5, 2008

Chapter 6's worked record is the page's regression example. It combines a bridged civilian period, overlapping appointments, verified military time, converted intermittent hours, and excess nonpay—while excluding contractor work.

  • Current appointment EOD: November 15, 2018
  • DLA and Interior service bridged into April 20, 2006–December 31, 2012
  • Overlapping Commerce and Agriculture service merged into February 24, 2013–September 9, 2014
  • Verified military credit: 1 year, 1 month, 4 days
  • 2,134 post-1986 intermittent hours: 1 year, 0 months, 9 days
  • Seven months of ordinary LWOP: 1 month of excess nonpay
  • Contractor service excluded from Federal civilian credit

Figure 6-6 ledger

A total
6037-18-59
B total
4028-22-54
SCD-Leave

This published example verifies the rule implementation; it is not a template for entering service you did not perform.

Scope boundary

Reconcile documented service; stop on unresolved credit

The worksheet can preserve a partial ledger when a fact needs HR verification, but it will not manufacture an official-looking date.

Included in the model

  • An SCD-Leave estimate anchored to the current appointment entrance-on-duty date
  • Prior full-time and part-time Federal civilian appointment periods
  • Concurrent-service merging and OPM's one-to-three-day continuity rule
  • Agency-verified active-duty military service duration
  • Pre- and post-March 1, 1986 intermittent service with the applicable OPM conversion table
  • Already approved 5 C.F.R. § 630.205 service credit and other agency-certified durations
  • Documented excess nonpay, or an explicitly labeled personal approximation
  • Three- and fifteen-year annual-leave service milestone dates and a worksheet-ready CSV

Stops or stays outside

  • SCD-Retirement, adjusted SCD-RIF, and TSP vesting SCD calculations
  • Contractor time or unapproved private-sector experience
  • A decision about military-retiree exceptions, campaign credit, or Title 32 service
  • A decision about NAF portability, Peace Corps/VISTA, or another special statutory service category
  • Protected nonpay eligibility that has not already been resolved
  • Intermittent service that spans March 1, 1986 and has not been split by payroll records
  • Duration-only credits that may overlap a dated civilian appointment
  • An official agency service-credit decision or a replacement for SF-50 Block 31 and SF-144A

Canonical sources

Public rules, local calculation

The calculator independently implements OPM guidance, governing statutes, and current regulations. It does not scrape another calculator or request a live government response while you use it.

Sources last verified . Reconcile the estimate with SF-50 Block 31, SF-144A, and agency HR; those records control.

SCD calculator FAQ

Know what the date can—and cannot—decide

How do you calculate a service computation date?

First identify the benefit-specific SCD. For SCD-Leave, this calculator follows OPM's preferred SF-144A method: add the merged appointment dates, current entrance-on-duty date, and excess nonpay in the A ledger; add separation dates, inclusive-separation-day credits, and verified duration credits in the B ledger; subtract B from A using twelve 30-day months; then convert the constructed result to a valid calendar date.

How is a federal service computation date calculated when appointments overlap?

Overlapping or concurrent full-time and part-time Federal civilian appointments are merged into one elapsed-calendar period. The same calendar day is not credited twice. Civilian breaks of one, two, or three calendar days are treated as continuity and disclosed; a four-day break remains a real break.

Can I use this as a military service computation date calculator?

You can add agency-verified active-duty military duration to an SCD-Leave estimate. The tool does not decide military-retiree exceptions, campaign-only credit, Title 32 status, or whether a particular document establishes credit. A military deposit or buyback affects retirement credit, not ordinary SCD-Leave credit.

Is SCD-Leave the same as my retirement or RIF service computation date?

Not necessarily. SCD-Leave, SCD-Retirement, adjusted SCD-RIF, and the TSP vesting SCD serve different purposes and can credit service differently. The calculator stops on retirement, RIF, TSP, or unsure selections instead of presenting one date as universal.

What records should I use for an OPM service computation date calculator?

Start with SF-50 appointment and separation actions, SF-50 Block 31, an agency SF-144A, DD-214 or SF-813 military verification, and payroll records for intermittent work or nonpay. Use only already approved prior-experience credit. Agency HR remains responsible for the official date.

How does leave without pay change SCD-Leave?

Ordinary nonpay is generally creditable through six aggregate months in a calendar year, so only the resolved noncreditable excess moves the date forward. Protected military or compensable-injury absences can receive different treatment. Enter the agency-documented excess when available; any personal estimate is clearly labeled as an approximation.

Is this online service computation date calculator official?

No. FedUp.work independently applies published OPM, statute, and regulation rules to the facts you enter; OPM does not endorse this calculator. It is a browser-only planning worksheet, not an official agency service-credit decision, SF-50, or SF-144A.

Are my service dates sent to FedUp.work or a government website?

No. The calculator runs in your browser and does not transmit or store your entries. Its versioned rules are local, so calculating a result does not require a live OPM request, third-party date service, or FedUp data-platform lookup.

Continue the record check

Use the tool that matches the next decision

Keep leave, retirement, military deposits, and RIF retention standing in their own rule sets, then bring verified dates into your broader transition plan.

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