Your FERS retirement estimate can look official and final. But it may still be wrong. That matters a lot, because one small error in service time, high-3 pay, or sick leave can change your pension by hundreds of dollars a month for life.
Here’s the good news: you do not need to be a retirement expert to read retirement statement numbers and catch problems early. You just need to know what to look for. If you want the fastest way to check your own numbers, try the free calculator at Is My Job Worth It. It helps you see your likely pension, pay, and tradeoffs without digging through a pile of forms.
What a FERS retirement estimate is really showing
A FERS estimate is usually your agency’s best guess of what your pension could be if you retire on a certain date. It is not the same as your final annuity claim from OPM.
Your estimate often includes:
- Your years and months of creditable service
- Your projected high-3 average salary
- The FERS pension formula
- Sick leave credit, if included
- A survivor benefit reduction, if elected
- Sometimes the Special Retirement Supplement
- Sometimes FEHB and FEGLI deductions
Your final retirement claim is handled by OPM.gov, and the final math may change if your records are updated. You can also review OPM’s own annuity tools at My Annuity and Benefits and the FERS computation page at OPM retirement computation.
Here’s the basic formula for most FERS employees:
- 1% x high-3 average salary x years of service
If you retire at age 62 or later with at least 20 years, the multiplier is often higher:
- 1.1% x high-3 average salary x years of service
So if your high-3 is $100,000 and you have 30 years:
- Before age 62 rule: 1% x $100,000 x 30 = $30,000 a year
- Age 62+ with 20 years: 1.1% x $100,000 x 30 = $33,000 a year
That is a $3,000 yearly difference. This is why checking your statement matters.
For a bigger picture, our guide to FERS retirement benefits can help you see how the pension fits with TSP and Social Security.
How to read your OPM retirement statement line by line
1. Start with your service history
Look at every period of federal service listed. Make sure dates are right.
Check for:
- Missing civilian service
- Wrong start or separation dates
- Temporary time not counted
- Military service not credited
- Leave without pay counted wrong
- Part-time service handled wrong
If you served in the military and later became a federal civilian, this is a big one. If you made a military deposit, that bought-back time may count toward FERS. If it is missing, your estimate may be low. Our military buyback guide explains when that extra time is worth real money.
2. Check the high-3 average salary
Your high-3 is your highest average basic pay over any 36 straight months. It is usually not your last three calendar years. It is also based on basic pay, not every kind of pay.
Basic pay usually includes:
- Base GS or wage rate
- Locality pay
- Special salary rates, if applicable
Basic pay usually does not include:
- Overtime
- Bonuses
- Awards
- Travel per diem
- Most allowances
If your estimate uses the wrong salary, the pension can be off by a lot. If you are not sure what counts, read our high-3 salary guide.
3. Check the multiplier
Most people get 1%. Some get 1.1%. Special groups like law enforcement officers, firefighters, and air traffic controllers may have different rules for part of their service.
If your estimate assumes the wrong multiplier, that is one of the most common federal retirement estimate errors.
4. Look for reductions
Your gross annuity is not always your net payment.
Your estimate may show reductions for:
- Survivor benefit
- Unpaid deposit or redeposit
- Early retirement reduction
- FEHB premiums
- FEGLI premiums
- Taxes
A full survivor election for a spouse usually reduces the pension, but it protects your spouse after death. For more on that tradeoff, see our FERS survivor benefits article.
Common federal retirement estimate errors to watch for
Wrong service time
This is the biggest problem. A missing year of service can cut the pension by 1% or 1.1% of your high-3.
Example:
- High-3: $92,000
- Missing service: 2 years
- Pension loss at 1%: 0.01 x $92,000 x 2 = $1,840 a year
- That is about $153 a month
Over 25 years of retirement, that is about $46,000 before COLAs.
Sick leave not included or counted wrong
Unused sick leave can increase your annuity, but it does not help you become eligible to retire. It only boosts the amount.
If you have 2,087 hours of sick leave, that is about one extra year of service credit for the pension formula.
Example:
- High-3: $80,000
- Extra credit from sick leave: 1 year
- Added pension: 1% x $80,000 x 1 = $800 a year
Not huge each month, but still about $67 a month for life.
Wrong retirement date assumptions
A statement may assume you retire on December 31, but you may really plan to leave in June. That changes service time, high-3, leave, and maybe your multiplier.
It can also affect the Special Retirement Supplement. If you want more on that, see our Special Retirement Supplement guide.
Military deposit missing
For former active-duty members now in civil service, missing bought-back military time can be a costly mistake. If you also receive military retired pay, the rules get more complex. Military members should also check records with DFAS and compare with broader retirement planning info from Military.com.
Practical examples: what errors can cost in real dollars
Example 1: GS employee with 30 years
Maria is age 62 with 30 years of service. Her high-3 is $105,000.
Correct formula:
- 1.1% x $105,000 x 30
- = 0.011 x 105,000 x 30
- = $34,650 a year
- = about $2,887.50 a month
But her estimate used 1% instead of 1.1%.
Wrong estimate:
- 1% x $105,000 x 30 = $31,500 a year
Difference:
- $3,150 a year
- About $262.50 a month
That is a major miss.
Example 2: Employee with missing military buyback time
James did 6 years active duty, then 18 years as a civilian. He paid the military deposit, but the estimate only shows 18 years.
His high-3 is $89,000.
Wrong estimate:
- 1% x $89,000 x 18 = $16,020 a year
Correct estimate:
- 1% x $89,000 x 24 = $21,360 a year
Difference:
- $5,340 a year
- $445 a month
That is why military members should compare agency records, OPM records, and DFAS records.
Example 3: Wrong high-3 pay
Tanya is a GS-13 in a high locality area. Her last three years of basic pay were $118,000, $121,000, and $124,000. Her average high-3 should be about $121,000.
But her estimate used only base pay and missed locality, showing $108,000 instead.
She has 27 years of service.
Wrong estimate:
- 1% x $108,000 x 27 = $29,160
Correct estimate:
- 1% x $121,000 x 27 = $32,670
Difference:
- $3,510 a year
- About $292.50 a month
If you want to compare this with your current salary picture, our GS pay scale guide and pay info topic page can help.
Example 4: Sick leave overlooked
Robert has a high-3 of $97,000 and 29 years of actual service. He also has 1,044 hours of sick leave, or about six months of extra service credit.
Without sick leave:
- 1% x $97,000 x 29 = $28,130
With six extra months:
- 29.5 years x 1% x $97,000 = $28,615
Difference:
- $485 a year
- Around $40 a month
That may not sound huge, but it adds up over time.
This is where a calculator helps. Is My Job Worth It can help you test different retirement dates, service totals, and pay levels much faster than doing it by hand.
What people often get wrong about an OPM retirement statement
A few myths trip people up:
- “My estimate is final.” It is not. OPM makes the final call after reviewing your file.
- “My last salary is my high-3.” Not always. High-3 is the highest 36 straight months.
- “Sick leave helps me retire sooner.” It does not. It can raise the amount, not eligibility.
- “Overtime counts in my pension.” Usually no. FERS mostly uses basic pay.
- “If HR made it, it must be right.” HR does its best, but records can still be wrong.
It also helps to read outside coverage from FedWeek, GovExec, and Federal Times when rules change. For TSP planning, use TSP.gov. For Social Security estimates, use SSA.gov. For Medicare questions, see CMS.gov. For taxes on your pension, TSP, and Social Security, IRS.gov is the key source. We also cover that in our federal retirement tax planning guide and our benefits guide.
How to read retirement statement numbers and verify them step by step
Step 1: Gather your records
Pull together:
- Your latest retirement estimate
- SF-50s
- Leave and earnings statements
- Military deposit proof, if any
- Service computation date records
- Sick leave balance
Step 2: Rebuild your service timeline
Write down each service period. Mark any breaks. Confirm that bought-back military time is shown if it should be.
Step 3: Check your high-3
Use 36 straight months of highest basic pay. Include locality pay if it applied. Do not add overtime or awards.
Step 4: Run the formula yourself
Use:
- 1% x high-3 x years of service
- Or 1.1% if age 62+ with 20 years
Then compare your result to the estimate.
Step 5: Review deductions and options
Ask:
- Is a survivor benefit included?
- Are FEHB and FEGLI shown?
- Is there an early retirement penalty?
- Is the Special Retirement Supplement listed?
Step 6: Get a second check
This is the easiest part now. Use Is My Job Worth It to test your own numbers fast. Then, if something still looks off, take your notes to your HR office and ask for a corrected estimate.
If you are close to retirement, our top mistakes to avoid before retirement article is also worth a read.
Bottom Line
A FERS retirement estimate is useful, but it is only useful if the numbers are right. The biggest trouble spots are service time, high-3 pay, sick leave, military buyback, and the wrong multiplier. Even a small error can mean losing $100 to $400 a month.
So don’t just file away your OPM retirement statement. Read it. Check the math. Compare it to your records. Use official sources like OPM.gov, TSP.gov, SSA.gov, and DFAS. Then try the calculator to see your personal results at Is My Job Worth It. It is the fastest way to turn a confusing estimate into a real plan.