High-3 Salary Explained: How It Affects Your Federal Pension

Common Misconceptions About the High-3

Misconception: "It's always my last 3 years." While the final 3 years are most common, the high-3 is any 3 consecutive years where your average basic pay was highest. An employee who took a voluntary demotion in their final year might have a high-3 from an earlier period.

Misconception: "Overtime counts." It does not. Overtime, bonuses, cash awards, recruitment/retention incentives, lump-sum leave payments, and most premium pay are excluded from the high-3 calculation. Only basic pay subject to retirement deductions is included.

Misconception: "Sick leave raises my high-3." Unused sick leave adds to your creditable service for the pension formula multiplier, but it does not create a longer or higher-paying period for the high-3 average. The high-3 uses only actual pay periods where you received basic pay.

Detailed Calculation Example

Consider a GS-14 Step 8 employee in the DC locality area retiring after 30 years. Their pay over the final 3 years:

Year 1 (GS-14 Step 7 DCB): $162,500 annual. Year 2 (GS-14 Step 8 DCB after WGI): $166,574 annual. Year 3 (GS-14 Step 8 DCB after 1% pay raise): $168,240 annual.

High-3 average: ($162,500 + $166,574 + $168,240) / 3 = $165,771.

FERS pension (age 62, 30 years): 1.1% × $165,771 × 30 = $54,705 per year, or $4,559 per month before taxes and survivor benefit reductions.

Strategies to Maximize Your High-3

Pursue promotions before your final 3 years: A promotion that raises your grade even one level can add thousands to your high-3. The earlier in the high-3 window the promotion occurs, the greater its impact on the average.

Consider locality area: If you can transfer to a higher locality area for your final 3 years without significantly increasing living costs, this directly raises your high-3. However, be aware that some employees overestimate this benefit after accounting for higher housing and commuting costs.

Stay until after the annual pay raise: If you are planning to retire in early January, staying just until the pay raise takes effect (first applicable pay period on or after January 1) means your final year uses the higher salary.

Avoid voluntary demotions near retirement: A demotion to a lower grade reduces your basic pay, which could lower your high-3 if it occurs during or near the 3-year window.

The High-5 Proposal: What Could Have Been

The HOGR committee print (Section 90003) proposed changing the pension calculation from high-3 to high-5, effective for new retirees beginning January 2027. CBO estimated this would have saved $4.7 billion over 10 years by reducing average pension amounts. For a typical employee with rising pay, a high-5 average would be roughly $3,000–$5,000 lower than a high-3, translating to $30–$55 less per month in pension income. This provision was removed before passage and was never enacted. The high-3 calculation remains the law. Source: CRS IF12996, IF13020.

Part-Time Service and the High-3

If you worked part-time during your federal career, the high-3 uses your actual rate of basic pay for the position, not your part-time earnings. However, your annuity is then prorated based on the ratio of part-time hours to full-time hours. For example, if you worked half-time for 10 years of a 30-year career, your high-3 would use your full-time equivalent pay, but those 10 years would count as 5 full-time equivalent years in the service calculation. This can significantly affect your total pension if you have extended periods of part-time work.

Military Service and the High-3

If you have creditable military service that you have "bought back" (made a deposit for under 5 U.S.C. §8422(e)), this service adds to your years of creditable service in the pension formula but does not affect your high-3 salary. The high-3 uses only periods where you received federal civilian basic pay subject to FERS retirement deductions. Military base pay, while relevant for Social Security, is not included in the FERS high-3 calculation.

Special Considerations for CSRS Offset and Transferees

Employees who transferred from CSRS to FERS use the same high-3 calculation, but their annuity is computed differently: the CSRS portion uses CSRS rules (more generous accrual rates), and the FERS portion uses FERS rules. The high-3 salary is the same for both portions, but the formula applied differs based on the system in effect during each period of service. This "component" annuity calculation can result in a higher pension than a pure FERS annuity for employees with significant CSRS service.

CSRS Offset employees (those who were moved to CSRS Offset when they became covered by Social Security) have their CSRS annuity reduced at age 62 by the portion of their Social Security benefit attributable to their offset service. This offset does not change the high-3 salary calculation, but it does reduce the net pension amount received after age 62.

The High-3 and Cost-of-Living Adjustments

After retirement, your FERS pension receives annual cost-of-living adjustments (COLAs). However, the COLA is applied to your pension amount, not to your high-3 salary. The high-3 is locked at retirement and never changes. COLAs for FERS retirees under age 62 are generally zero (with some exceptions for disability retirees). After age 62, FERS COLAs match CPI-W if under 2%, or CPI-W minus 1% if CPI-W exceeds 3%. CSRS COLAs are more generous, matching the full CPI-W. This means your high-3 salary becomes increasingly important over time as the anchor point from which inflation adjustments are calculated for the rest of your life.