How is the FERS pension calculated?

For FERS Regular employees, the formula is: Annual Pension = Multiplier × Years of Creditable Service × High-3 Average Salary. The standard multiplier is 1.0% (0.01). If you retire at age 62 or older with 20 or more years of service, the multiplier increases to 1.1% (0.011). For example, retiring at 62 with 30 years of service and a $90,000 High-3 salary yields $90,000 × 0.011 × 30 = $29,700/year.

What is the High-3 salary for FERS?

The High-3 is the average of your highest three consecutive years of basic pay during your federal career. For most employees, this is typically the final three years before retirement. Basic pay excludes locality pay adjustments in some calculations, but for FERS it includes base pay plus any pay increases during those three years. Overtime, bonuses, and allowances are generally not included.

What age can I retire under FERS?

FERS has a Minimum Retirement Age (MRA) that ranges from 55 to 57 depending on birth year — most employees born after 1969 have an MRA of 57. You can retire at MRA with 30+ years of service for an immediate unreduced pension, or at age 60 with 20+ years, or at age 62 with 5+ years. Early retirement (MRA with 10+ years) is possible but comes with a 5% per year reduction for each year under age 62.

What is FERS Special retirement (law enforcement)?

FERS Special applies to law enforcement officers, firefighters, air traffic controllers, nuclear material couriers, and certain other positions with physically demanding duties. The formula is 1.7% per year for the first 20 years of covered service, plus 1.0% for each additional year. This yields a significantly higher pension — 34% of High-3 at 20 years versus 20% under Regular FERS. Special employees also have a mandatory retirement age of 57 in most cases.

Does FERS include Social Security and TSP?

Yes — FERS is a three-part system: the FERS Basic Benefit (the pension calculated here), Social Security, and the Thrift Savings Plan (TSP). The FERS pension alone typically replaces 20–35% of pre-retirement income. Combined with Social Security (another 20–40%) and TSP withdrawals, most FERS retirees can target 70–90% income replacement. This is why the TSP — especially with the 5% agency match — is critical to a full retirement package.

What are FERS survivor benefit options?

When you retire, you can elect a survivor annuity for your spouse: a full survivor benefit (50% of your pension) reduces your pension by 10%, while a partial benefit (25%) reduces it by 5%. There is also a "None" election, but your spouse must consent in writing. The survivor benefit continues for the life of your surviving spouse. Electing no survivor benefit saves money now but leaves your spouse without income if you predecease them.

What is the FERS Special Retirement Supplement?

The FERS Supplement bridges the gap between FERS retirement and age 62 when Social Security begins. It approximates what your Social Security benefit would be based on your FERS-covered service years and is paid until you reach age 62. The supplement is subject to an earnings test — if you have earned income above $22,320 (2026 threshold), your supplement is reduced $1 for every $2 over the limit. It is not available to employees who retire under MRA+10.

FERS Pension Calculator — Annual & Monthly Benefit

Estimates annual and monthly FERS pension for federal employees based on High-3 salary, years of service, and retirement type.

How to Use This FERS Pension Calculator

This FERS pension calculator estimates your federal retirement benefit in minutes. Enter your High-3 average salary (the average of your highest three consecutive years of basic pay), your years of creditable federal service, your planned retirement age, and your retirement system(FERS Regular or FERS Special). The calculator applies the correct OPM multiplier and shows your estimated annual and monthly pension benefit.

How the FERS Pension Formula Works

The FERS Basic Benefit (also called the FERS annuity) is calculated as:

Annual Pension = Multiplier × Years of Service × High-3 Salary

For FERS Regular employees, the multiplier is 1.0% in most cases. If you retire at age 62 or older with at least 20 years of service, the multiplier increases to 1.1% — a 10% bonus for staying in federal service longer. For FERS Special positions (law enforcement, firefighters, air traffic controllers), the formula uses 1.7% for the first 20 years of covered service, then 1.0% for any additional years.

AdvertisementResponsive Ad

Understanding Your High-3 Average Salary

Your High-3 is the average of your highest three consecutiveyears of basic pay. For most employees approaching retirement, this is the final three years of their career. Basic pay generally includes your base grade and step pay, but excludes overtime, bonuses, locality pay additions in some contexts, and allowances. Review your SF-50 history and consult your agency's HR office to confirm your High-3 calculation, especially if you have part-time service, military service, or leave-without-pay periods.

FERS Regular vs. FERS Special

Most federal civilian employees fall under FERS Regular. FERS Special — sometimes called the Law Enforcement Officer (LEO) or firefighter retirement system — applies to positions with hazardous duties, including:

Law enforcement officers (federal agents, park rangers, border patrol, etc.)
Firefighters and forestry technicians
Air traffic controllers
Nuclear materials couriers
Capitol Police and certain other protective service roles

Special employees can typically retire at age 50 with 20 years of covered service, or at any age with 25 years. Mandatory retirement at age 57 applies to most Special categories. The higher 1.7% multiplier for the first 20 years compensates for earlier mandatory retirement and physically demanding career paths.

FERS Retirement Eligibility Requirements

FERS retirement eligibility depends on age and years of service:

Immediate unreduced pension: Age 62 with 5+ years, age 60 with 20+ years, or at your Minimum Retirement Age (MRA) with 30+ years.
MRA+10 (reduced): At your MRA with at least 10 years of service. Benefits are reduced 5% per year under age 62 unless you postpone the start date.
Early out / discontinued service: Age 50 with 20+ years (if offered by agency) or at any age with 25+ years under certain conditions.

Your MRA depends on your birth year: employees born in 1970 or later have an MRA of 57. Use the Coast FIRE calculator to model whether your TSP savings are on track to supplement your pension.

AdvertisementResponsive Ad

The FERS Three-Part Retirement System

FERS is intentionally designed as a three-legged stool:

FERS Basic Benefit (this calculator) — typically replaces 20–35% of pre-retirement income for a 25–35 year career. The pension is adjusted annually by a COLA (Cost of Living Adjustment) based on CPI, though FERS COLAs are capped below the full CPI adjustment in high-inflation years.
Social Security — FERS employees pay full Social Security taxes and earn full benefits. Use the Social Security calculator to estimate your Social Security benefit at different claiming ages.
Thrift Savings Plan (TSP) — Federal agencies match TSP contributions up to 5% of salary. Maximizing the TSP match and making additional contributions is critical to filling the gap between the pension alone and full income replacement.

FERS COLA and Survivor Benefits

FERS pensions receive a cost-of-living adjustment each year for retirees age 62 and older. If inflation (CPI-W) is 2% or less, the COLA equals CPI. If CPI is between 2% and 3%, the COLA is 2%. If CPI exceeds 3%, the COLA is CPI minus 1 percentage point. Unlike CSRS retirees, FERS retirees under 62 at retirement receive no COLA until they turn 62.

You can elect a survivor benefit for your spouse — a full benefit (50% of your pension) or a partial benefit (25%). Electing the full survivor benefit reduces your pension by 10%. Electing no survivor benefit saves the reduction but leaves your spouse unprotected.

Financial Disclaimer

This calculator provides estimates based on publicly available OPM formulas. Actual FERS benefits are calculated by OPM and may differ based on part-time service credit, military deposits, LWOP periods, and other factors. This is not official retirement counseling. Contact your agency HR office or OPM for an official retirement estimate.

FERS Pension Calculator