FERS High-3 Salary: How OPM Calculates ItAnd How to Maximize Yours Before You Retire
Your FERS pension formula is: High-3 × Years of Service × 1%. That High-3 number is the single biggest lever in your retirement income. Getting it wrong — or leaving money on the table — can cost you thousands of dollars per year, for life.
What Is the "High-3" in FERS?
Your High-3 is the average of your highest 3 consecutive years of basic pay during your federal career. It is not your last 3 years — it's your 3 highest consecutive years, which may or may not be the same thing.
"Basic pay" includes your base salary and locality pay. It does not include overtime, bonuses, awards, allowances, or hazard pay.
What Counts — and What Doesn't
| Pay Type | Counts Toward High-3? |
|---|---|
| Base salary (GS/WG/SES) | ✓ Yes |
| Locality pay (COLA) | ✓ Yes |
| Law enforcement / firefighter special pay | ✓ Yes |
| Within-grade step increases | ✓ Yes |
| Overtime pay | ✗ No |
| Performance bonuses / awards | ✗ No |
| Hazard pay / environmental differential | ✗ No |
| Night differential / Sunday premium | ✗ No |
| Retention, relocation, or recruitment incentives | ✗ No |
Source: 5 CFR Part 870 and OPM retirement guidance. Verify with your HR for special pay categories.
How OPM Calculates Your High-3
Step-by-Step Example
- Year 1 (Jan–Dec): $85,000 base + locality = $97,000
- Year 2 (Jan–Dec): $88,000 base + locality = $101,000
- Year 3 (Jan–Dec): $91,000 base + locality = $105,000
- High-3 Average: ($97,000 + $101,000 + $105,000) ÷ 3 = $101,000
If you received a mid-year promotion in Year 3, OPM would calculate the weighted average for those 12 months at two different pay rates, then average across the 36-month window that yields the highest result.
How Pay Freezes and Furloughs Affect Your High-3
Federal government pay freezes — like the one that lasted 2011–2013 — can directly reduce your High-3 if those years fall within your final 36-month window. During a pay freeze, there are no within-grade step increases, no general schedule pay increases, and no locality pay adjustments. Your basic pay is frozen in nominal terms, which means the real (inflation-adjusted) value actually declines.
Similarly, an unpaid furlough reduces your pay during those periods. OPM calculates your High-3 using the actual pay received over the 36-month window, so furlough weeks lower the average.
5 Strategies to Maximize Your High-3
1. Time a Promotion or Step Increase Before Retirement
A promotion or within-grade step increase that takes effect during your final 36-month window directly raises your High-3. Even a GS step increase of 3% can add $1,500–$4,000/year to your pension — for life.
2. Accept a Temporary Promotion Carefully
If you serve in a higher-grade position temporarily, that pay counts toward your High-3. If your agency rotates you back before 36 months, you may not capture the full benefit. Confirm the duration before accepting.
3. Delay Retirement by 1–2 Years After a Pay Raise
If you got a significant raise in the last year, your High-3 window may not fully capture it yet. Retiring 12–18 months later can shift your 36-month window to include the higher salary throughout.
4. Maximize Locality Pay Opportunities
Locality pay is included in basic pay for High-3 purposes. If you can accept an assignment to a higher-locality area for your final 3 years, your High-3 will be higher.
5. Avoid Pay Cuts in Your Final 3 Years
A voluntary downgrade, shift to part-time, or move to a lower locality area in your final 3 years will reduce your High-3. Plan any such moves for after retirement.
High-3 Impact on Your Pension: The Numbers
| High-3 Salary | 25 Yrs (1%) | 30 Yrs (1%) | 30 Yrs (1.1%) |
|---|---|---|---|
| $80,000 | $1,667/mo | $2,000/mo | $2,200/mo |
| $100,000 | $2,083/mo | $2,500/mo | $2,750/mo |
| $120,000 | $2,500/mo | $3,000/mo | $3,300/mo |
| $140,000 | $2,917/mo | $3,500/mo | $3,850/mo |
Gross monthly pension shown. The 1.1% multiplier applies if you retire at 62+ with 20+ years of service.
Common High-3 Mistakes to Avoid
- ✕Assuming your last 3 calendar years equal your High-3. OPM looks at the 36-month window, which may span parts of 4 calendar years.
- ✕Including overtime, bonuses, or awards in your calculation. These are excluded from basic pay.
- ✕Forgetting to count the correct locality pay percentage for your duty station.
- ✕Not accounting for a pay freeze or furlough period that may reduce your High-3 if it falls within your 36-month window.
- ✕Miscounting the start of your "highest" 36-month window. OPM tests all possible 36-month segments to find the highest average — it is not always the most recent.
High-3 and Part-Time Service: A Special Warning
If you work part-time during your final 3 years — even temporarily — it directly reduces your High-3. Part-time basic pay is prorated based on your hours worked. For example, if you work 32 hours per week instead of 40, your basic pay is recorded as 80% of the full-time rate. That lower pay flows directly into your High-3 calculation.
Many federal employees consider phased retirement or reduced hours before leaving. While this can improve quality of life, the pension cost is permanent. A $10,000 reduction in your High-3 costs you $100/year in pension income for every year of creditable service — and that gap compounds with every COLA adjustment for the rest of your life.
Example: 2 Years Part-Time (80%) Before Retirement
- Full-time High-3 target: $110,000
- Actual High-3 with 2 years at 80%: ~$103,333
- Pension reduction (30 years of service): −$200/year ($16.67/month)
- Over a 25-year retirement: −$5,000 total pension loss
Frequently Asked Questions About FERS High-3
Q: Does locality pay count toward my High-3?
A: Yes. Locality pay is included in your basic pay and counts fully toward your High-3 calculation. This is one reason federal employees in high-locality areas (like DC, San Francisco, or New York) often have significantly higher pensions than colleagues doing the same job in lower-locality regions.
Q: What if I had a gap in federal service — does it reset my High-3?
A: No. A break in service does not reset the clock. Your highest 36 consecutive months are evaluated across your entire career. However, breaks can affect whether service is "creditable" for pension purposes, which is a separate issue. If you left and returned, your HR can clarify which service periods are creditable.
Q: I received a large performance bonus this year. Does it boost my High-3?
A: No. Performance awards, bonuses, cash incentives, and quality step increases in cash form are not included in basic pay for High-3 purposes. Only permanent salary — your base GS rate plus locality — counts.
Q: Can I request my High-3 estimate from OPM before I retire?
A: You can request a retirement estimate through your agency HR or via OPM's retirement services. The estimate will include an approximate High-3 based on your personnel records. It's worth requesting this 1–2 years before your planned retirement date to identify any potential issues.
Q: Does hazard pay or law enforcement availability pay count?
A: Standard hazard pay differentials (environmental differential for WG employees, for example) generally do not count. However, law enforcement officers under special FERS provisions receive Law Enforcement Availability Pay (LEAP) as part of basic pay — that DOES count toward their High-3. If you are in a special category, verify with your HR.
Q: I retired and OPM's High-3 is lower than I expected. What can I do?
A: You can file an appeal with OPM if you believe your High-3 was calculated incorrectly. You should gather your SF-50s (Notice of Personnel Action) for the relevant years, your W-2s, and any documentation of locality rates. OPM is required to recalculate if you can demonstrate an error. A federal benefits attorney can assist with formal appeals.
Related Articles for FERS Retirees
See Your Exact High-3 and Pension Projection
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For educational purposes only. Consult your agency HR, OPM, or a qualified federal benefits advisor for your specific High-3 calculation.