Savings Withdrawal Calculator
Estimate how long savings could last with regular monthly withdrawals. Explore positive, zero and negative constant-return assumptions.
Before you calculate
Fixed end-of-month withdrawals and a constant effective annual return. No fees, taxes, inflation increases or market volatility. A balance lasting beyond 100 years in this simplified model is not a sustainable-withdrawal guarantee. Real return sequences can lead to very different outcomes.
How long will my savings last with monthly withdrawals?
Each month the balance first changes by the assumed monthly return, then funds a withdrawal. When the remaining money cannot cover the full withdrawal, the model reports the fraction it can cover. Results stop at a 100-year horizon.
Monthly return = (1 + annual return)^(1/12) − 1; next balance = balance × (1 + monthly return) − withdrawal
Worked example
At a 0% return, $100,000 with $1,000 monthly withdrawals covers exactly 100 withdrawals, or about 8.3 years.
Assumptions and limits
Fixed end-of-month withdrawals and a constant effective annual return. No fees, taxes, inflation increases or market volatility. A balance lasting beyond 100 years in this simplified model is not a sustainable-withdrawal guarantee. Real return sequences can lead to very different outcomes.
How to interpret MoneyCalc estimatesFrequently asked questions
Can this prove my retirement money will last?
No. It is a constant-return scenario. Retirement decisions also depend on market sequences, changing expenses, longevity, taxes and other income.
What does more than 100 years mean?
The balance did not run out during the modeled 1,200 months. The calculator stops there rather than claiming that the money lasts forever.
Further reading
Background resources; these organizations do not endorse this calculator.
Sources & calculation notes
Maintained by MoneyCalc. Results are estimates based on the inputs and assumptions shown, not personalized financial advice or a lender quote. Default rates are examples unless a specific tax year or official table is identified.
References explain the underlying concepts or rules. They do not endorse or independently certify this implementation.
Calculations run in your browser. Some tools retain settings on this device. Displayed rounding can produce small differences from a statement or contract.