Pension COLA Calculator

Project pension purchasing power with and without COLA adjustments.

By Konstantin Iakovlev · Updated April 2026 · Source: IRS

$
%
%

In 10 Years (with COLA)

$3,656.98

Purchasing Power

$2,721.14

Pension Projections

5 years$3,312.24 nominal / $2,857.17 real
10 years$3,656.98 nominal / $2,721.14 real
15 years$4,037.61 nominal / $2,591.59 real
20 years$4,457.84 nominal / $2,468.20 real

Use the Pension COLA Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.

How It Works

A pension that never changes looks stable on paper, but inflation quietly chips away at what each check can actually buy. Picture a fixed monthly benefit that starts in 2026: if prices climb at an average of 3% a year, that same payment stretches far less by 2036, even though the dollar amount on the statement stayed identical. The tool here separates the nominal figure from its real, inflation-adjusted worth so you can see that gap clearly.

To build the projection, the calculator applies an annual inflation rate you choose against your benefit. When a Cost of Living Adjustment is in play, it raises the starting payment by your specified COLA percentage each year; for a pension with no adjustment, it holds the dollar amount steady and tracks how the purchasing power shrinks against that inflation rate over time.

COLA percentages tend to move year to year rather than stay locked, since many plans tie them to indices such as the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W). Two details often catch retirees off guard: an adjustment can trail the inflation it is meant to offset, leaving a shortfall, and some plans cap how high the COLA percentage can go in any single year. Knowing whether your plan has such a cap matters as much as the headline rate.

Example: John's 2026 Pension Scenario

  1. 1 John is retiring in 2026 with an initial annual pension of $30,000. He wants to see the impact of a 2% COLA versus no COLA over 10 years, assuming a 3% average annual inflation rate.
  2. 2 **With COLA:** His pension increases by 2% annually. **Without COLA:** His pension remains $30,000. In both cases, the purchasing power is reduced by 3% annually due to inflation.
  3. 3 **After 10 Years (2036):** * **With 2% COLA:** John's nominal pension will be approximately $36,569. Its real (2026) purchasing power will be around $27,150. * **Without COLA:** John's nominal pension remains $30,000. Its real (2026) purchasing power will have decreased to approximately $22,325.
  4. 4 This example clearly shows that even a modest 2% COLA significantly preserves purchasing power compared to a fixed pension. Without any COLA, John's pension would lose over 25% of its initial buying power over a decade, making it harder to cover rising costs of living in retirement.

Source: IRS · Last updated: April 2026

Frequently Asked Questions

Do all pensions have cost of living adjustments?
No. Federal CSRS and FERS pensions include COLA provisions, and most state government pensions offer some adjustment. Private-sector pensions rarely include automatic COLA, so their purchasing power erodes with inflation over time.
How does a pension without COLA lose value?
At 3% annual inflation, a fixed pension loses about 26% of its purchasing power in 10 years and about 45% in 20 years. Even modest inflation significantly erodes retirement income without adjustments.
Is FERS pension COLA the same as Social Security COLA?
Not exactly. FERS retirees under age 62 generally receive no COLA. After 62, if the CPI increase is 2% or less, FERS COLA matches it. If CPI exceeds 2% but is under 3%, FERS COLA is 2%. If CPI exceeds 3%, FERS COLA is CPI minus one percentage point.

You might also need

401(k) Calculator 2026 — Retirement Savings & Employer Match

Calculate your 401(k) balance at retirement with employer match and growth projections. Compare Roth vs Traditional. Based on 2026 IRS contribution limits.

Roth IRA Calculator 2026 — Growth, Limits & Tax-Free Income

Calculate Roth IRA growth projections and tax-free withdrawals. Compare to Traditional IRA side by side. Free, instant results with 2026 contribution limits.

Roth Conversion Calculator 2026 — Tax Impact & Break-Even

Calculate the tax impact of converting a Traditional IRA to Roth. See your break-even year and multi-year projections. Free, instant results for 2026 rates.