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RetirementPlanCalc · US planning tools

Retirement Inflation Calculator

Estimate a future expense or the purchasing power of future dollars using an inflation rate you choose.

Free · No account required · Results below

Your planning inputs

How to use the retirement inflation calculator

  1. Enter your own balances, time period, and spending or contribution amounts. Keep today’s dollars and future dollars separate.
  2. Choose return and inflation assumptions. Returns should reflect fees. The default numbers are examples, not recommendations or forecasts.
  3. Select Calculate. Results appear below your inputs. Read the assumptions alongside the estimate.
  4. Try lower returns, higher inflation, and a longer retirement horizon where the tool allows it. Save your assumptions so you can compare scenarios.

How the calculation works

Compound the chosen inflation rate once per year. To discount a future face amount into current purchasing power, divide by that same cumulative inflation factor.

A simple example

At 3% for 25 years, a $50,000 expense becomes about $104,689. At zero inflation, it remains $50,000.

Read the result with care

A calculator can make a planning tradeoff easier to see. It cannot predict future investment returns, personal spending, tax rules, or how long you will need your money.

These projections use simplified assumptions. Account limits, tax treatment, investment risk, healthcare costs, and the timing of Social Security can change a real retirement plan. Check account and benefit details with their official providers.

If a result looks too optimistic, compare several scenarios and review the inputs. A model that works with constant returns can still fail when actual returns vary during withdrawals.

Frequently asked questions

Are the default return and inflation rates forecasts?

No. They are editable assumptions for examples. No live market, inflation, or account data is loaded.

Does this calculator include taxes or account limits?

No. Review taxes, eligibility, account-access rules, and contribution limits separately. The employer-match tool is also a simplified one-tier formula.

Why do today’s dollars and future dollars differ?

Inflation changes purchasing power. Future-dollar results describe the modeled account or expense amount at a later date. Today-dollar results discount that amount using your inflation assumption.

Are my entries sent to an account service?

This calculator runs in your browser and does not connect to your bank, employer, or investment accounts. Avoid entering account numbers or other sensitive details.

Educational estimates only. Results are not personalized financial, investment, tax, or legal advice and do not guarantee retirement income. Read the methodology and disclaimer.

Planning tools maintained by RetirementPlanCalc. Report a calculation issue.