How Long Will My Retirement Savings Last Calculator
Estimate how many years your retirement savings will last based on your current savings, annual withdrawals, expected return rate, and inflation.
Published by:
isCalculator Editorial Team
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How to use this tool?
This calculator estimates how many years your retirement savings will last, considering investment returns and inflation.
- Enter Current Savings ($): The total amount you have saved for retirement (e.g., 500000).
- Enter Annual Withdrawal ($): How much you plan to withdraw each year (e.g., 30000).
- Enter Expected Annual Return (%): The average yearly return on your investments (e.g., 5 for 5%).
- Enter Annual Inflation Rate (%): The expected yearly inflation rate (e.g., 2 for 2%).
- Click "Calculate": The calculator will show how many years your savings will last.
- Number of years: The estimated time until your savings run out, shown in years with one decimal.
- Indefinite: Your savings will last forever if your withdrawal is less than or equal to the real return (return minus inflation).
- The calculator uses a real rate of return (adjusted for inflation) to account for purchasing power loss.
Understanding the result:
Note: All inputs must be non-negative numbers. Withdrawal and savings cannot be zero. Return and inflation rates must be between 0% and 100%.
Previous Results
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Frequently Asked Questions
The calculator uses the future value of a growing annuity formula to determine how long your savings will last given your annual withdrawals, expected return rate, and inflation. If the real rate of return (return minus inflation) is positive, it uses the formula: n = ln(1 - (P * r) / W) / ln(1 + r), where P is savings, W is annual withdrawal, and r is real rate. If the real rate is zero or negative, it assumes linear depletion.
If your annual withdrawal is less than or equal to the real return on your savings (i.e., your savings grow at least as fast as you withdraw), your savings will never run out. The calculator shows 'Indefinite' in that case.
This calculator is a simplified model. It does not account for taxes, fees, or changes in spending. For a more comprehensive plan, consult a financial advisor.
