FERS Retirement Calculator

Finance August 9, 2026

A FERS retirement calculator estimates the pension a US federal employee earns under the Federal Employees Retirement System. This FERS retirement calculator is free with no sign-u

A FERS retirement calculator estimates the pension a US federal employee earns under the Federal Employees Retirement System. This FERS retirement calculator is free with no sign-up. You enter your high-3 salary and years of service. It returns a pension estimate. You can then adjust the inputs and see the effect.

FERS is the main retirement system for federal workers hired since the 1980s. It provides a basic pension based on service and salary. It also works alongside Social Security and the Thrift Savings Plan. This tool focuses on the basic pension part. That is the piece most people want to estimate.

Our tool uses US dollars and follows the standard FERS formula. It acts as a clear federal retirement calculator. Everything is free, with no account and no ads. You can test as many scenarios as you like. There is nothing to sign up for and no pressure.

How FERS is calculated

The FERS pension uses a straightforward formula. It multiplies your high-3 salary by your years of service. That product is then multiplied by a set percentage factor. This gives your yearly basic pension. The tool applies the formula for you automatically.

Each part of the formula plays a clear role. The salary sets the scale of the pension. The years reward a longer career. The factor converts them into a yearly figure. Together they give a fair, predictable result.

One leg of three

The pension is only one leg of FERS. It sits alongside Social Security and the TSP. Together these three form your retirement income. This tool focuses on the pension leg. You can add the others for a full view.

When you retire can change the factor used. Retiring later with enough service can raise it. This rewards a longer federal career. The rules here are specific and detailed. The calculator uses standard factors for clarity.

What the factor adds

The percentage factor is commonly 1% per year of service. A higher factor can apply if you retire at an older age with enough service. This rewards longer and later careers. The exact rules can vary by situation. The calculator uses standard factors for a clear estimate.

So the three key inputs are salary, service, and the factor. Each one moves the pension up or down. A longer career raises the pension noticeably. A higher high-3 salary does the same. The tool lets you test each input on its own.

The result is an annual figure for your basic pension. You can divide it by twelve for a monthly view. This is only the FERS basic pension. It does not include Social Security or the TSP. Those add to your total federal retirement income.

Why the figure is an estimate

Because rules and factors change over time, treat the output as a guide. The calculator uses current-year figures where relevant. Your official estimate should come from your agency. Still, this gives you a fast, useful starting point. It helps you plan before the paperwork.

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High-3 salary & years of service

Your high-3 salary is the average of your highest three years of basic pay. These are usually your final three years, but not always. Any consecutive 36 months can count if they are higher. This average feeds directly into the pension formula. A higher high-3 lifts the pension.

What counts as basic pay

Basic pay is the figure that counts here. It excludes overtime and most bonuses. Locality pay is generally included, however. Knowing what counts helps you estimate well. The tool uses your high-3 salary as entered.

Late-career promotions can lift your high-3 average. A higher grade raises your final years of pay. That in turn raises the whole pension. So advancement near the end pays off. The calculator shows the effect clearly.

You can test different high-3 figures quickly. Try your current pay, then a promoted pay. Watch how the pension responds to each. This helps you plan your final years. It shows what a raise is really worth.

How years of service count

Years of service means the time you have worked under FERS. More years raise the pension in two ways. They increase the multiplier and can unlock a better factor. So a long career pays off strongly. The calculator shows how each extra year helps.

Certain types of service can count toward the total. Some prior federal work or military time may be included. Rules on this can be detailed and specific. The tool keeps the estimate simple and clear. Your agency can confirm exactly what service counts.

Both inputs work together in the formula. A high salary with few years gives a modest pension. Many years at a lower salary can still build a solid one. The best outcome combines both over a full career. You can test different mixes in the tool.

Small changes to either input shift the result. Try adding a couple of years of service. Then try a slightly higher high-3 salary. Comparing the totals makes the effect clear. It helps you see what drives your pension most.

Worked example

Consider an illustrative high-3 salary of 90,000. Assume thirty years of service and a 1% factor. The formula gives 90,000 times thirty times 1%. That equals about 27,000 a year. Treat this only as an example of the method.

You can change the inputs to match your record. Enter your own high-3 salary and service. The pension estimate updates at once. That makes it easy to plan ahead. You see your likely figure quickly.

Remember this figure is the basic pension only. Social Security and the TSP add to it. Together they form your full income. Planning around all three is wise. The tool focuses on the pension part.

Comparing scenarios helps you decide when to retire. Try a few more years of service. Then try a higher final salary. Each lifts the pension in a clear way. That guides your timing well.

Converting to a monthly figure

Divide that yearly figure by twelve for a monthly view. The monthly basic pension would be around 2,250. Remember this is before any deductions. It also excludes Social Security and the TSP. Those extra sources add to your total income.

Now raise the service to thirty-five years. The pension climbs to about 31,500 a year. Those extra years clearly lift the result. This shows why a longer career matters. The federal retirement calculator makes the comparison easy.

These figures are an estimate for general guidance only, and this is not financial advice. FERS rules and factors change over time. For an official figure, consult your agency or a qualified financial adviser first.

A quick FERS estimate helps you plan your federal retirement early. Try it free on FreeUSUKCalculator.com: no sign-up, no ads, with US and UK modes.

Frequently Asked Questions

Is this FERS retirement calculator free? Yes. It is completely free with no sign-up and no ads. You can run as many FERS pension estimates as you like, whenever you like.

What is the high-3 salary? It is the average of your highest three consecutive years of basic pay. This average feeds directly into the FERS pension formula.

How is the FERS pension worked out? It multiplies your high-3 salary by your years of service and a set factor, often 1% per year. The tool applies this for you.

Does this include Social Security or the TSP? No. It estimates the FERS basic pension only. Social Security and the Thrift Savings Plan add to your total federal retirement income.

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