Savings Withdrawal Calculator - Retirement Income Plan

Savings withdrawal calculator estimates a sustainable monthly withdrawal after interest and inflation so you can plan retirement income with confidence.

Enter a nest-egg balance, expected return, inflation, and payout years to estimate a level monthly withdrawal that exhausts the account at the horizon.

Savings withdrawal calculator estimates a sustainable monthly withdrawal after interest and inflation so you can plan retirement income with confidence.

Initial Savings Amount

Annual Interest Rate (%)

Expected Inflation Rate (%)

Withdrawal Period (Years)

About Sustainable Retirement Withdrawals

The savings withdrawal calculator answers a planning question many retirees ask: if this nest egg must last a stated number of years, how much can be withdrawn each month after investment return and inflation? It solves the standard loan-style payment (PMT) formula on a present value, using a real monthly rate so the withdrawal is expressed in today’s purchasing power. That is more useful than a nominal figure that looks generous in year one and quietly shrinks at the grocery store. The real annual rate is (1+i)/(1+π) − 1, where i is the expected annual return and π is expected inflation. That real rate is divided by 12 to get r, and the year count is multiplied by 12 to get n. The sustainable monthly withdrawal is then PV × r / (1 − (1+r)^(−n)). If the real rate is zero, the payment is simply the balance divided by the number of months. Withdrawals are modeled as end-of-month payments, which matches how many brokerages process a systematic withdrawal plan. Use the savings withdrawal calculator to sanity-check a pension gap, a bridge to Social Security, or a 15- to 30-year drawdown of a taxable brokerage account. Pair a conservative return (for example 4%) with a realistic inflation assumption (for example 2–3%) rather than hoping both markets and prices stay still. Sequence-of-returns risk, advisory fees, taxes on realized gains, and required minimum distributions are not inside the formula, so a household that spends the full PMT every month can still run out early if markets are poor in the first years. The estimate also assumes a constant real withdrawal, not a rising nominal paycheck. If you need spending to grow with inflation in cash terms, this real-rate method is the right first cut; if you need a nominal dollar amount that never changes, set inflation to zero. Keep one currency throughout. The result is an educational planning figure, not a guarantee of lifetime income, and it is not tax, legal, or investment advice.

Retirement Withdrawal Examples

Each example solves for a level monthly withdrawal using a real monthly rate.

Inputs	Output	Notes
Balance 400,000, return 5%, inflation 2%, 25 years	1,884.63	A long retirement drawdown with a modest real return.
Balance 250,000, return 4%, inflation 3%, 20 years	1,146.49	Inflation nearly offsets return, so the payment is closer to a spend-down.
Balance 100,000, return 6%, inflation 0%, 15 years	843.86	Nominal withdrawal with no inflation haircut, useful as an upper bound.

How to Estimate a Sustainable Monthly Withdrawal

Enter the current nest-egg balance you can draw from.
Enter the expected annual return and the inflation rate as percents.
Enter how many years the money should last.
Select Calculate to see the sustainable monthly withdrawal in today’s purchasing power.

Savings Withdrawal Calculator FAQ

Is this the 4% rule?

No. The 4% rule is a research heuristic for a 30-year portfolio. This calculator solves an annuity payment for the exact balance, real rate, and year count you enter, so the percentage of the starting balance will change with those inputs.

How is inflation included?

Inflation is combined with the return through the Fisher real rate (1+i)/(1+π) − 1, then converted to a monthly rate. The payment is therefore a real, level amount rather than a nominal amount that loses purchasing power each year.

What if I want a fixed nominal dollar withdrawal?

Set expected inflation to zero. The calculator then uses the nominal return only and the monthly figure will not be reduced for rising prices.

Can sequence-of-returns risk make this estimate too high?

Yes. The formula assumes a smooth monthly return. Poor markets in the first years of retirement can deplete the account faster than a constant-rate model shows, so many planners haircut the payment or hold a cash reserve.

Does the estimate include taxes?

No. Withdrawals from a traditional IRA or 401(k) may be taxable, and taxable brokerage sales can create capital gains. Use a lower spending figure if you need to set aside money for tax.