FIRE Retirement Calculator
Project when you can retire based on your current savings, monthly investing and target retirement spending. Uses the 'multiply by 25' / 4% safe withdrawal rule as the default.
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Real returns are net of inflation. The default 4% withdrawal rate comes from the Trinity Study and is a common (but not guaranteed) rule of thumb.
Frequently asked questions
What is the 4% rule?
The 4% rule, from the Trinity Study, suggests you can withdraw 4% of your initial portfolio per year (adjusted for inflation) with a high probability of not running out over 30 years. To find your FI number, multiply your annual spending by 25.
Should I use a real or nominal return rate?
Use real (inflation-adjusted) returns. Historical real returns for a globally diversified stock portfolio are around 5-7%. Using nominal returns will overestimate how soon you can retire.
Does this account for tax in retirement?
No. Your target spend should be the post-tax amount you need to live on. Where that money comes from (ISA, pension, taxable account) will determine the tax treatment.