About the Safe Withdrawal Rate Calculator
Apply the 4% rule (or any rate) to see a sustainable first-year withdrawal and the portfolio needed for your spending.
Also known as: 4 percent rule, swr calculator, fire withdrawal, safe withdrawal.
How to use this calculator
- Enter portfolio, withdrawal rate, annual spending (optional).
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
Withdrawal = portfolio × rate
Worked example
Using the values pre-filled in the calculator above:
- Portfolio = 1,000,000
- Withdrawal rate = 4 %
- Annual spending (optional) = 45,000
the calculator returns:
- Annual withdrawal: 40,000
- Monthly: 3,333.33
- Portfolio needed for your spending: 1,125,000