A promotion late in a federal career raises pay right away. How much it also raises the Federal Employees Retirement System (FERS) pension depends on how long the higher salary is included in the high-3 average. The same promotion can add several thousand dollars a year to a pension or a much smaller amount, depending on when it takes effect.
This guide explains how the high-3 works, shows the same promotion at three different timings, and covers what else changes besides the pension.
How the high-3 works
The basic FERS pension is the high-3 average salary multiplied by years of creditable service and a percentage. Under the regular FERS formula, the percentage is 1 percent for most employees, or 1.1 percent for those who separate for retirement at age 62 or older with at least 20 years of service. Special-category employees, including certain law enforcement officers and firefighters, have different formulas. The FERS annuity calculation page shows how the calculation works.
The high-3 is the highest average basic pay over any three consecutive years of service, often described as a 36-month window. It is not the average of the last three calendar-year salaries. For most General Schedule (GS) employees, basic pay includes locality pay but excludes ordinary overtime, bonuses and awards. Certain special forms of pay can count under separate rules. Each pay rate is weighted by the length of time it was in effect within the high-3 period, so the average rises gradually after a pay change. The high-3 average salary guide explains the weighting.
What a promotion is worth at three, two and one year before retirement
The table below uses a simplified example. The employee has 30 years of service and retires at or above the minimum retirement age, but before age 62, under the regular FERS formula with a 1 percent multiplier. Basic pay is $110,000, and a promotion raises it to $128,000, an increase of approximately 16.4 percent. The retirement date and total service remain the same in every scenario. No other raises are included, so the only variable is when the promotion takes effect.
| Promotion timing | High-3 | Annual pension | Gain per year | Gain over 20 years |
|---|---|---|---|---|
| No promotion | $110,000 | $33,000 | n/a | n/a |
| 3 years before retirement | $128,000 | $38,400 | $5,400 | $108,000 |
| 2 years before retirement | $122,000 | $36,600 | $3,600 | $72,000 |
| 1 year before retirement | $116,000 | $34,800 | $1,800 | $36,000 |
A promotion three years out covers the entire high-3 period, so the average equals the new salary. At two years out, two of the three years are at $128,000 and one is at $110,000, which averages to $122,000. At one year out, only one year of the period is at the higher salary. In this example, each year the promotion slips later removes one-third of the full potential pension increase.
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The pension figures are gross amounts before survivor-benefit reductions, taxes and insurance deductions. The 20-year totals are simple multiples of the annual gain, assume payments continue for the full period, and exclude cost-of-living adjustments. Actual results will differ because pay rates can change during the period and promotions rarely line up with exact one-year boundaries. The high-3 calculation weights each rate by the precise length of time it was in effect, including partial years.
Why the raise at promotion may be smaller than expected
The $18,000 raise in the example is illustrative. Under the two-step promotion rule, a covered GS employee generally receives the lowest pay rate in the higher grade that provides an increase at least equal to two step increases in the grade being left. The actual raise depends on the employee’s current grade and step and the applicable pay schedules. Additional rules apply when a promotion involves a change in work location or special-rate coverage.
A smaller raise produces a smaller increase in the high-3, even when the timing is the same. Before estimating the pension effect, confirm the actual salary the promotion would provide. The Office of Personnel Management (OPM) explains the rule in its promotion pay-setting fact sheet. The GS pay scale shows step rates by grade and locality.
What else a promotion changes
- Thrift Savings Plan (TSP): employee contributions set as a percentage of basic pay generally increase with salary, subject to contribution limits. Agency contributions also increase in dollar terms. For eligible FERS employees, contributing at least 5 percent of basic pay each pay period generally brings in the full agency contribution of 5 percent, including the automatic 1 percent.
- FERS payroll deductions: the employee contribution applies to the higher salary, so take-home pay rises by less than gross pay. Standard regular-employee contribution rates are 0.8, 3.1 or 4.4 percent of basic pay, depending on retirement coverage; special-category rates can differ.
- Federal Employees’ Group Life Insurance (FEGLI): Basic coverage is tied to annual basic pay, so the coverage amount and associated premium can increase.
- Survivor benefits: for the same survivor election, a larger unreduced pension generally means a larger survivor annuity and a larger dollar reduction in the retiree’s pension. The FERS survivor election article shows how the numbers work.
- FERS Supplement: a promotion does not raise the supplement through the high-3 formula. The supplement is based on years of FERS service and an estimate of the Social Security benefit built from FERS earnings, which are capped at the Social Security taxable maximum each year, so a late-career raise usually changes it little, if at all.
When a late promotion may not be worth chasing
A promotion that takes effect only a few months before retirement usually adds relatively little to the high-3. Weigh that pension gain and the additional salary against what comes with the job: new duties, a possible relocation or longer commute, and any decision to work longer than planned. Accepting a promotion while keeping the same retirement date is a different financial decision from postponing retirement to spend more time at the higher salary.
Delaying retirement can add service, salary and retirement savings, but it also means forgoing pension payments during the delay. Reaching age 62 with at least 20 years of service can also change the regular FERS multiplier from 1 percent to 1.1 percent. The article on ways to increase your FERS monthly pension covers the other factors. Run the numbers before accepting a promotion or changing the retirement date to pursue one.
Where the new time-in-grade rule fits
OPM has finalized a rule that removes the governmentwide 52-week time-in-grade restriction on advancement to covered competitive service GS positions at GS-6 and above, effective January 19, 2027. The final rule in the Federal Register removes an eligibility barrier; it does not create a right to promotion. Employees must still meet applicable qualification standards and agency promotion requirements.
Agencies may retain job-related waiting periods in their written merit promotion plans if those requirements are consistently applied. OPM’s qualification standards have also included a comparable one-year service requirement, which OPM is reviewing separately. The rule does not change within-grade increase requirements.
For employees near retirement, the practical effect depends on agency promotion policies, available positions and the employee’s qualifications. An earlier promotion can put more time at the higher pay rate into the eventual high-3 period. Its retirement value depends on the actual pay increase and how long the employee receives that pay before retiring.
How to check your own numbers
Start with the pay history for the last several years, including every promotion and step increase, because the high-3 weights each pay rate by how long it was in effect. If an earlier period included higher basic pay, review that period as well. The free High-3 Average Salary Estimator Worksheet (PDF) walks through the calculation. Run it once without a promotion and once with a promotion at different dates, keeping the retirement date the same to isolate the promotion’s effect.
If postponing retirement is also under consideration, run a separate comparison that includes the additional service, any change in the pension multiplier, additional salary and savings, and pension payments forgone during the delay.
Then ask the human resources office whether the agency has updated its merit promotion plan and whether any career-ladder promotions could occur before the planned retirement date. Your agency can provide a retirement estimate; OPM determines the final annuity.