Pension Benefit Estimation

Most public sector pensions have a 2-3% annual cost-of-living adjustment. Most private sector pensions do NOT include one, so your benefit stays flat regardless of inflation.

Without a cost-of-living adjustment, a $4,000/month pension loses about half its purchasing power over 20 years at 3% inflation. With a 2% annual increase, the same pension grows to ~$5,900/month by year 20, partially offsetting inflation. Some public plans link increases to the Consumer Price Index (capped at 2-3%), while others use a fixed percentage. If your plan has no annual increase, this is a significant factor in the lump sum vs annuity decision because a lump sum invested for growth may better preserve purchasing power.

Most pensions use the formula: Years of Service × Final Average Salary × Benefit Multiplier. For example, 30 years × $80,000 Final Average Salary × 2% multiplier = $48,000/year ($4,000/month).

The Final Average Salary is typically your highest 3 or 5 consecutive years of earnings, not your career average. The benefit multiplier is a percentage set by your plan, usually between 1.0% and 3.0% depending on your sector. Private corporate plans typically use 1.0-1.7%, public employee plans use 1.5-2.0%, teachers get 1.5-2.5%, and public safety (police/fire) often receive 2.0-3.0%. Your plan's Summary Plan Description will list your specific multiplier.

There's no universal right answer. The annuity wins if you live longer than average and value guaranteed income. The lump sum wins if you're a disciplined investor, have health concerns, or want to leave assets to heirs.

Key factors to consider: (1) Longevity: if you live past the actuarial breakeven age, the annuity pays more total dollars. (2) Interest rates: when IRS segment rates are high (as in 2026), lump sums are relatively smaller, making the annuity more attractive per dollar spent. (3) Inflation: if your pension has no cost-of-living adjustment, inflation erodes purchasing power; a lump sum invested to beat inflation may preserve value better. (4) Survivor needs: a lump sum in an IRA passes to heirs; an annuity may stop at death (unless Joint & Survivor is elected). (5) Investment skill: can you realistically earn more than the implicit rate built into the annuity? The breakeven is roughly 5-6% annually.

You keep your earned benefit. There is no penalty for leaving after you are fully vested. Your benefit is calculated based on your years of service and salary at the time you leave, and you can collect it when you reach the plan's retirement age.

Once fully vested, your pension benefit belongs to you permanently. If you leave before retirement age, your benefit is "frozen" at the amount you earned through your departure date (based on your years of service and salary at that time). You then have two options: (1) wait until you reach the plan's Normal Retirement Age and collect the full amount, or (2) start collecting at the plan's early retirement age (often 55) with a reduced benefit. Your benefit will not continue to grow after you leave since no new years of service are being added, but you do not lose what you have already earned. Some plans also offer a lump sum payout when you separate from service.

Retiring before your plan's Normal Retirement Age (typically 65) permanently reduces your benefit. The common reduction is 5-6.67% per year early. Retiring 5 years early at 5%/year means a 25% permanent reduction.

The early retirement reduction exists because you'll collect benefits for more years than planned. The reduction makes the total expected payout roughly equivalent whether you retire early or wait. Important: this reduction is permanent and it doesn't go away when you reach Normal Retirement Age. Some plans offer unreduced benefits through "Rule of" provisions (e.g., your age plus years of service equals 80 or 85). Check your plan's Summary Plan Description for your specific early retirement provisions.

A Joint and Survivor annuity reduces your monthly benefit but continues paying your spouse (or beneficiary) after your death. Options typically include 50%, 75%, or 100% continuation at the cost of a 10-18% reduction to your benefit.

The Employee Retirement Income Security Act (ERISA) requires that married participants in private pension plans default to a 50% Joint and Survivor annuity unless the spouse signs a written waiver. The typical reductions are: 50% Joint and Survivor reduces your benefit by ~10% (spouse receives half after your death), 75% reduces by ~15%, and 100% reduces by ~18% (spouse receives your full benefit). The exact reduction depends on the ages of both you and your spouse. A much younger spouse means a larger reduction because the plan expects to pay longer.

Under the Employee Retirement Income Security Act (ERISA), private sector pensions must vest you at 100% after 5 years (cliff vesting) or gradually over 3-7 years (graded vesting). Public sector plans vary by state, typically requiring 5-10 years.

Vesting means you've earned a non-forfeitable right to your pension benefit. With cliff vesting, you own nothing until year 5, then own 100%. With graded vesting, you accumulate ownership gradually: 20% at year 3, 40% at year 4, 60% at year 5, 80% at year 6, and 100% at year 7. Once vested, you can leave the employer and still collect your pension at the plan's retirement age. Your own contributions (in public plans) are always immediately vested; it's the employer-funded benefit that vests on a schedule.

About 86% of state/local government workers and only 14% of private sector workers have access to a defined benefit pension. Pensions are concentrated in government, teaching, police/fire, military, utilities, and unionized industries.

The shift away from pensions has been dramatic: private sector access dropped from 35% in the 1990s to 14% in 2025 (Bureau of Labor Statistics). Financial activities has the highest private-sector rate at 31%. Public sector pensions remain strong, with teachers, police, firefighters, and general government employees almost universally having defined benefit plans. Federal employees hired after 1987 have the Federal Employees Retirement System (1% multiplier + Thrift Savings Plan), while those before 1987 have the more generous Civil Service Retirement System. If you work for a private company, check if your plan is "frozen" (no new accrual) versus active.