🏖️ Retirement & FIRE Calculator
Free retirement calculator: estimate your FIRE number with inflation and a safe-withdrawal rate, project your savings and see the monthly amount needed to close the gap.
Target in today's money: — · Progress: —
How this calculator works
First, your desired income is inflated to the year you retire. Dividing that by your withdrawal rate gives the portfolio size that could sustain it — at a 4% rate, that is 25× your annual spending, the classic "FIRE number." Next, your current savings and monthly contributions are projected forward at your expected return. The difference is your gap, and the calculator solves for the monthly contribution that would close it exactly by your target age.
The 4% guideline comes from studies of historical US market returns over 30-year retirements. Early retirees with 40–50-year horizons, or people retiring into weak markets, often use 3–3.5% for extra safety. Government pensions (Social Security, CPP/OAS, the UK State Pension, EPF/NPS, the Age Pension) reduce how much you must fund yourself — subtract them from the income figure.
Frequently asked questions
What is a FIRE number?
It is the invested amount that could fund your annual spending indefinitely at a chosen withdrawal rate. At 4%, multiply annual spending by 25; at 3.5%, by about 28.6.
Should I use nominal or real returns?
This calculator uses nominal returns and inflates your income target separately, so enter an expected nominal return (before inflation).
How accurate is this?
It is a planning estimate with constant returns. Real results depend on market sequence, taxes, fees and spending changes. Revisit it yearly or ask a fee-only advisor to stress-test it.
Want a professional to check this plan?
Tell us your goal and we'll introduce you to independent, fee-only advisors who fit. Takes about 60 seconds.
More free tools
Compound Interest Calculator
See how a lump sum plus monthly contributions grows over time.
🏡Mortgage Calculator with PMI
Monthly payment, total interest, taxes, insurance and PMI in one view.
⛓️Debt Payoff Planner (Avalanche vs Snowball)
Compare avalanche and snowball side by side and see your debt-free date.
🧮50/30/20 Budget Calculator
Split take-home pay into needs, wants and savings — and compare to reality.
Results are estimates for educational purposes based on the inputs and assumptions shown; they are not a guarantee or a recommendation. Last reviewed October 30, 2026.