Federal Severance Pay Calculator

How federal severance pay is calculated

Federal severance is governed by 5 U.S.C. § 5595. The formula has three parts:

Step 1 — Severance weeks: You earn 1 week of basic pay for each of the first 10 years of creditable federal service, and 2 weeks for each year above 10. An employee with 20 years earns 10 + (10 × 2) = 30 weeks. Partial years count in full 3-month steps (25% of a year's weeks each).

Step 2 — Age adjustment: If you are over 40, add 2.5% for each full 3 months of age over 40 — 10% per year. A 52-year-old adds 12 × 10% = 120%, more than doubling their base weeks. This adjustment rewards older employees whose workforce reintegration is harder.

Step 3 — 52-week cap: The adjusted total cannot exceed 52 weeks of basic pay — roughly your annual salary. The cap mainly affects employees over 40 with 25 or more years of service.

The FERS immediate annuity exclusion

This is the most consequential, least-understood rule. Under 5 U.S.C. § 5595(b)(1), federal employees who are entitled to an immediate retirement annuity at the time of separation are excluded from severance pay entirely.

For a RIF or other involuntary separation, the involuntary immediate annuity thresholds under FERS are:

• Age 50 with 20 or more years of creditable service
• Any age with 25 or more years of creditable service

If you meet either threshold, you are entitled to an immediate annuity — meaning your pension starts immediately, not deferred. OPM will not pay both an immediate annuity and severance; the annuity takes precedence. Employees in this situation should run the pension math, not the severance math.

Employees who are only eligible for a postponed or deferred retirement (MRA+10) do NOT trigger the exclusion — they are entitled to severance if they do not elect an immediate annuity.

How severance is paid

OPM pays severance in biweekly installments, at the same rate as your basic pay, as if you were still employed. It is not paid in a lump sum. Payments stop if you return to federal service, obtain a federal job through a noncompetitive appointment, or die. Any remaining balance after return to service is forfeited.

Severance is subject to federal income tax withholding, Medicare tax (1.45%), and in many states, state income tax. Social Security withholding applies unless you have already hit the annual wage base.

Severance vs. retirement: which is better?

For employees near the involuntary retirement thresholds, this is the most important financial comparison of the RIF decision. Severance is taxable and temporary — it ends after a fixed number of weeks. A FERS annuity is permanent, grows with COLA, and preserves FEHB coverage in retirement (assuming the 5-year rule is met).

An employee at age 50 with 20 years and a $90,000 salary might receive roughly $40,000 in gross severance over 18 months. The same employee's involuntary retirement annuity would be approximately $18,000/year — and while it starts lower than severance income, it never stops. The break-even is typically under five years from retirement date.