Retirement Withdrawal Calculator

How to use this retirement withdrawal calculator

What this calculator does

This calculator models regular withdrawals from an invested retirement balance. In “How much can I withdraw?” mode, it solves for the level payment in today's purchasing power that reduces the projected balance to approximately zero over your chosen retirement period. In “How long will my money last?” mode, it estimates the duration supported by a fixed payment. It is a deterministic planning model, not a forecast of market performance, taxes, fees, required minimum distributions, or personal suitability.

When to use it

Use it to test whether a planned retirement budget appears compatible with your savings, compare retiring earlier versus later, see the effect of a lower expected return or higher inflation, and create a year-by-year baseline for discussion with a qualified adviser. The SEC's compound-interest guidance and calculator is useful background for understanding why return assumptions compound over time.

How to calculate

1. The calculator opens with a complete demonstration: a $500,000 retirement balance, age 45 now, retirement at 65, a 30-year horizon, 5% nominal return, and 2.5% inflation. Its example workbook is available immediately.
2. Choose I'd like to know. Use the withdrawal option to solve for spending, or the duration option to enter a fixed Withdrawal amount.
3. Replace the example values with your own assumptions. Expand Advanced settings to choose payment frequency, compounding method, and whether withdrawals occur at the beginning or end of each period.
4. Read the primary result, supporting metrics, balance chart, and yearly schedule. Stress-test the plan with lower returns, higher inflation, or a longer retirement.
5. Select Download Excel to export the current validated model. Reset clears the demonstration and calculated data; Excel export remains unavailable until a complete valid state is entered again.

Input guide

Balance at the beginning of retirement is required U.S. currency, from $1 to $1 billion; enter plain digits with an optional decimal point, such as 500000. A larger balance supports a larger payment or longer duration. Do not enter a current balance if it is expected to change before retirement without adjusting it first. Your age now and Planned age to retire are required whole-year ages. The retirement age cannot be below the current age. Their difference drives the conversion between retirement-age dollars and today's dollars.

Planned years in retirement is required in withdrawal mode and accepts 1 – 70 years, including decimals. A longer horizon lowers the sustainable payment. Withdrawal amount is required in duration mode and is entered as monthly purchasing power even when another payment frequency is selected; the model converts it to the chosen frequency. A larger payment shortens the plan. Annual interest rate, Inflation rate before you retire, and Inflation rate after you retire are percentages entered without the percent sign, such as 5 or 2.5. Rates must be between -50% and 50%, and the combined real-return calculation must remain finite. Higher investment return generally raises sustainable spending; higher inflation lowers purchasing power.

Payment frequency sets monthly, quarterly, or yearly withdrawals. Compounding method controls how often the nominal annual return is credited; if your assumption is already an annual percentage yield, yearly compounding is the closest interpretation. Timing of withdrawals chooses beginning or end of period. Beginning payments leave the account sooner and therefore produce a slightly lower sustainable amount. These controls are required selections, and changing them updates every result, schedule row, chart point, and workbook cell.

Output guide

Sustainable monthly withdrawal is the constant real monthly spending estimate in withdrawal mode. In duration mode, the primary result becomes Estimated retirement duration. First-year nominal income translates the real payment to retirement-age dollars and annualizes it. Total real withdrawals is the sum of modeled withdrawals in today's dollars. Real annual return combines nominal return and post-retirement inflation; a negative value means purchasing power is expected to shrink even before withdrawals. Projected ending balance is the residual after the final modeled period; near zero is expected when solving for a payment.

The summary pills show retirement age, horizon, and real return. Years until retirement is the difference between the two ages. Withdrawal periods is the number of modeled payments. Retirement-age monthly income is the first payment expressed in future nominal dollars. The chart plots annual real principal balances. The schedule's Starting balance, Withdrawals, Investment return, and Ending balance columns reconcile each year. Zero ending balance means the modeled funds are exhausted at the horizon; a high residual means the entered fixed withdrawal is conservative under the assumptions.

Worked example

With the startup values, the nominal 5% return compounded monthly is adjusted for 2.5% retirement inflation, producing about a 2.55% effective real annual return. Over 360 beginning-of-month withdrawals, the $500,000 balance supports approximately $1,977.43 per month in today's dollars. Because retirement begins in 20 years, that first monthly payment is about $3,240.25 in retirement-age dollars after applying 2.5% pre-retirement inflation. The schedule then applies each payment and real periodic return until the balance reaches approximately zero after 30 years.

Learn more and important limits

Tax rules can require distributions that differ from this level-payment model. Review the IRS explanation of required minimum distributions and the SEC's overview of traditional and Roth IRA tax treatment. For inflation context, the Bureau of Labor Statistics Consumer Price Index explains the principal U.S. measure of consumer price change.