Your Pension, Step by Step
Calculate Your Benefit — Use the Calculator →
Your monthly pension = Years of Service × Multiplier% × Final Average Salary ÷ 12. Multiply by 12 for annual benefit. The formula is fixed — no market risk, no investment decisions required from you.
Understand When You Vest and Become Eligible — Early Retirement Tool →
Vesting (5–10 years) entitles you to a deferred pension. Full retirement eligibility — when you can draw an unreduced benefit now — requires more years and usually a minimum age. Leaving early means a permanently reduced benefit.
Choose Your Payout Option — Lump Sum Calculator →
Single life annuity pays the maximum monthly amount but ends at your death. Joint-and-survivor options continue payments to your spouse. Lump sum buyouts trade future income for a one-time payment — find your break-even age before deciding.
Model COLA and Long-Term Purchasing Power — COLA Calculator →
Without COLA, a $2,625/month pension loses 45% of its real value over 25 years at 3% inflation. Federal plans have COLA provisions. Most state plans cap COLA at 2–3%. Private pensions typically have no COLA at all.
Coordinate With Social Security — Federal Calculator (WEP/GPO) →
If your pension comes from a job not covered by Social Security taxes (many state and local government positions), the Windfall Elimination Provision (WEP) reduces your SS benefit. The Government Pension Offset (GPO) reduces spousal and survivor SS benefits.
Public Pension Plans at a Glance
| Plan | Vesting | Normal Retirement | Multiplier Range | COLA | WEP/GPO Applies? |
|---|---|---|---|---|---|
| FERS (Federal) | 5 years | MRA (56–57) + 30 yrs; Age 60 + 20 yrs; Age 62 + 5 yrs | 1.0% (1.1% at 62+20) | Full CPI-W (partial for some) | No — FERS covers SS |
| CSRS (Federal, legacy) | 5 years | Age 55 + 30 yrs; Age 60 + 20 yrs; Age 62 + 5 yrs | Tiered: 1.5%/1.75%/2.0% | Full CPI-W COLA | Yes — most CSRS workers not in SS |
| State/Municipal (avg) | 5–10 years | Age 60–65; or Rule of 80/90 | 1.5%–2.5% | Usually 2–3% cap | Varies — many states opt out of SS |
| Teacher (TRS avg) | 5–10 years | Age 55–65 + years requirements vary | 2.0%–2.5% | 1–3% cap (many plans) | Yes in 15 states — teachers not in SS |
| Military | 20 years for retirement | 20 years active service (any age) | 2.5% (High-36); BRS: 2.0% | Full CPI-W COLA | No — military pays into SS |
Plan details vary significantly within each category. Federal FERS details from OPM.gov. State plan data from NASRA. TRS data from NCTQ. 2026 figures.
Defined Benefit Pension Calculator
Full-featured — salary, years, multiplier, COLA rate, and survivor benefit toggle.
The Defined Benefit Formula in Plain Language
Every public pension in the U.S. uses some variation of the same three-factor formula:
Each element gives you a lever to understand. Years of service is the most controllable — every additional year compounds your benefit linearly. The multiplier is set by your plan and tier, ranging from 1.0% (FERS standard) to 2.5% or higher (some state plans for safety officers). Final average salary is usually based on your highest 3–5 consecutive years — timing your retirement at or after your salary peak significantly affects the base the formula is applied against.
High-3 vs High-5 vs Career Average
Federal FERS and CSRS use your "High-3" — the average of your three consecutive highest-pay years. Most state plans also use a 3-year or 5-year high average. A handful of older plans use a full career average, which typically produces a much lower final average salary and thus a lower benefit. If your plan uses High-3, maximizing your salary in the final 3 years before retirement directly lifts every dollar of your benefit calculation.
Planning note: If you receive a promotion or significant salary increase in year 27 or 28, it may be worth modeling whether staying through year 30+ captures that salary in your High-3 window. A $10,000 raise to $80,000 in the last 3 years adds $450/year ($37.50/month) at a 1.5% multiplier — $13,500 in additional lifetime income if you retire at 62 and live to 85.
Survivor Benefits Explained
At retirement, most plans offer you a choice between payout structures that trade monthly benefit size for income protection for your spouse. Understanding the math before you choose is critical — you typically cannot change this election after retirement begins.
Single Life Annuity
Pays the maximum monthly benefit for your lifetime only. When you die, payments stop entirely. If you outlive your spouse, or your spouse has independent retirement income sufficient for their needs, single life may be the financially optimal choice.
Joint-and-Survivor Options
Reduce your monthly benefit during your lifetime but continue paying your surviving spouse a portion (50%, 75%, or 100%) after your death. The reduction varies by plan and by the age difference between you and your spouse — older plans use actuarial tables to set the cost precisely. For FERS employees, the Survivor Benefit Plan (SBP) costs roughly 10% of your gross annuity for a 50% survivor benefit.
| Option | Your Monthly Benefit | Spouse's Benefit After Your Death | Monthly Cost |
|---|---|---|---|
| Single Life (no survivor) | $2,625 | $0 | — |
| 50% Joint & Survivor | ~$2,494 | ~$1,312/mo | −$131/mo |
| 75% Joint & Survivor | ~$2,415 | ~$1,969/mo | −$210/mo |
| 100% Joint & Survivor | ~$2,336 | ~$2,336/mo | −$289/mo |
Illustrative figures based on approximate FERS reduction factors. Actual reductions depend on your plan and age difference. Use the lump sum calculator to model the break-even for survivor vs non-survivor choices.
Social Security Coordination: WEP and GPO
Workers in pension-covered government jobs that did not withhold Social Security taxes face two potential Social Security reductions. This applies to approximately 40% of state and local government workers — mainly teachers, police, firefighters, and municipal employees in states where the workforce is not part of the Social Security system.
Windfall Elimination Provision (WEP)
WEP reduces your own Social Security benefit if you also receive a pension from non-SS-covered employment. The reduction is calculated using a modified formula that gives you less credit for your lower-earning SS years than a typical worker would receive. The maximum WEP reduction in 2026 is approximately $600/month. Workers with 30 or more years of "substantial earnings" under Social Security are exempt from WEP.
Government Pension Offset (GPO)
GPO reduces spousal or survivor Social Security benefits (benefits you'd receive based on your spouse's SS record) by two-thirds of your government pension. If your government pension is $2,625/month, GPO reduces your spousal SS benefit by $1,750/month — which often eliminates it entirely. GPO is one of the most significant and least understood reductions affecting married public employees.
Federal FERS employees: You are not subject to WEP or GPO because FERS employees pay full Social Security taxes and earn Social Security benefits normally. This is a significant advantage of FERS over CSRS and over most state government pension systems.
Lump Sum vs Monthly: When Each Makes Sense
Some plans offer a lump sum buyout at retirement — a one-time payment in lieu of the lifetime monthly annuity. The fundamental question is your break-even age: divide the lump sum by your monthly benefit to get the number of months (and thus the age) at which cumulative monthly payments would exceed the lump sum.
After your break-even age, monthly payments have delivered more total income than the lump sum — and they continue indefinitely. If you live to 85, the above pension delivers $552,000 in total payments vs $300,000 lump sum — $252,000 more. Use the lump sum calculator to model your specific scenario with NPV analysis.
When to consider the lump sum
- Serious health conditions that reduce expected longevity below the break-even age
- Strong estate planning goals — a 401(k) or IRA can leave assets to heirs; monthly pensions typically cannot
- High investment confidence — if you're certain you can earn more than the implied rate of return in the pension's pricing
- Employer offering an above-market lump sum (companies sometimes do this to reduce pension obligations)
Frequently Asked Questions
A defined benefit (DB) pension is a retirement plan that pays a guaranteed monthly income for life based on a formula — typically Years of Service × Multiplier% × Final Average Salary ÷ 12. The employer bears all investment risk; you receive the same monthly payment regardless of how the pension fund performs. Most public-sector employees have DB plans; they've become rare in the private sector.
Most plans use your highest 3 consecutive years ("High-3") or highest 5 years. Federal FERS uses High-3 average. For example, if your last three years of salary are $72,000, $75,000, and $78,000, your High-3 is $75,000 — and that's the salary figure your entire benefit formula is applied against. Some older plans use a full career average, which produces a significantly lower base and thus a lower benefit.
For private-sector pensions, the Pension Benefit Guaranty Corporation (PBGC) insures benefits up to about $7,150/month (2026) for plans terminating that year. For public-sector pensions, the PBGC does not apply — but state government pensions are typically backed by the state's taxing authority and legal obligation to fund benefits. Unfunded state pensions carry risk, but outright benefit elimination for current retirees is extremely rare and legally constrained.
Federal income tax: yes, in most cases. Pensions funded with pre-tax contributions are fully taxable as ordinary income when distributed. If you made after-tax contributions, a portion of each payment is a tax-free return of your contributions. State tax treatment varies widely — some states exempt all pension income; others tax it fully. Generally, if you live in a different state in retirement than where you earned the pension, you pay taxes in your state of residence.
COLA (Cost-of-Living Adjustment) is an annual percentage increase that partially offsets inflation. Federal CSRS receives full CPI-W COLA; FERS receives CPI-W minus 1% when inflation is above 2%. At 2.5% COLA, a $2,625/month pension grows to $3,337 after 10 years and $4,241 after 20 years. Without COLA, that same $2,625 loses roughly 45% of its purchasing power over 25 years at 3% average inflation. Use the COLA calculator to model your specific scenario.
Early retirement typically reduces your benefit in two ways: fewer years of service in the formula, and a penalty for starting benefits before your normal retirement age. The early retirement penalty for FERS MRA+10 is 5% per year before age 62. Most state plans use 3–6% per year before normal retirement age. A 5-year early retirement at 57 instead of 62 might cost 25% of your benefit permanently — on $2,625/month, that's $656/month lost for life. Use the Early Retirement Calculator to model your specific penalty.