Retirement Savings Calculator with Inflation
Project savings from a starting balance and monthly deposits. Compare nominal value, purchasing power and an illustrative withdrawal amount.
Your inputs
Your result
Enter your values, then choose Calculate.
Estimate based on your inputs. Fees, taxes and market changes are included only where explicitly entered.
Calculation breakdown
Method, assumptions and worked example
Monthly return = (1 + effective annual return)1/12 − 1. Contributions are added at the end of each month. The annual table separates your deposits from modeled investment growth.
Nominal balance versus purchasing power
Today’s-money value = projected balance ÷ (1 + inflation)years. An account balance decades from now can buy less than the same number today. Contributions stay constant in nominal money; they do not automatically rise with wages or inflation.
Worked example
Start with 10,000 and add 100 monthly for one year at 0% return. The ending balance is 11,200. With 2% inflation, that is approximately 10,980.39 in today’s money. A 4% withdrawal illustration is 448 for the first year, before tax.
The withdrawal percentage is a scenario input, not a guaranteed sustainable rate. This calculator does not model retirement drawdown, market volatility, sequence-of-returns risk, pensions, employer matching, tax limits or longevity. Add only contributions you actually expect to make.
Frequently asked questions
Is 4% guaranteed to last for life?
No. The output simply multiplies savings by the chosen percentage. A sustainable retirement plan depends on returns, retirement length, spending, taxes and other income.
Are contributions inflation-adjusted?
No. Monthly contributions are constant nominal amounts. Only the final balance is also displayed in today’s purchasing power.
Sources and review
Formula and content reviewed on 9 October 2026. Examples are hypothetical. Tax years and model limits are stated above; this page does not receive live rates.