About FIRE Calculator — find out when you can retire early
FIRE stands for Financial Independence, Retire Early. The whole idea rests on a single number: the size of the pot that can pay your living costs indefinitely, so that working becomes a choice rather than a necessity. That number is usually about 25 times your annual spending, which comes from the 4% safe withdrawal rate popularised by the Trinity study.
This calculator works the problem in four steps rather than asking for twenty figures at once. It also handles the two things most FIRE calculators ignore: that your money is split across safe deposits and growth investments earning different returns, and that income you already receive from rent or dividends reduces the corpus you need.
How to use it
- Enter your target. If you know your FIRE number, type it in. If not, enter what you expect to spend each month in retirement and the calculator derives the target from your chosen withdrawal rate.
- Split the corpus between FD/debt and mutual funds, and set the return you expect from each. The page shows the blended return and warns you if your planned withdrawal exceeds the real return after inflation.
- Enter your age, what you have already saved, and what you invest each month — with an annual step-up if your contributions rise with your income.
- Read the plan: the age you reach independence, a chart of the journey, and the effect of any rental or dividend income you add.
A worked example
Someone aged 30 spending ₹60,000 a month needs ₹1.8 crore at a 4% withdrawal rate (25 × ₹7.2 lakh a year). Investing ₹60,000 a month with an 8% annual step-up, split 40/60 between FD at 7% and mutual funds at 12%, they reach it at around age 42. Adding ₹30,000 a month of rental income cuts the target to ₹90 lakh and brings retirement forward to about 37 — because rent covers half the spending, so the corpus only has to fund the other half.
Frequently asked questions
- What is a FIRE number?
- It is the amount you need invested for the returns to cover your living costs indefinitely. At a 4% withdrawal rate it is 25 times your annual expenses; at a more conservative 3% it is about 33 times.
- Is the 4% rule safe?
- It is a useful starting point, not a guarantee. It came from historical US market data over 30-year retirements. If you are retiring very early, the money has to last much longer, so many people use 3% to 3.5%. This calculator lets you set the rate and shows whether your real return after inflation actually supports it.
- Should I use real or nominal returns?
- Real — inflation-adjusted — figures are easier to reason about, because ₹1.8 crore in today's money means something you can picture. The calculator defaults to today's money and offers a nominal toggle. Both describe the same plan and agree on the retirement age.
- Does rental income really reduce how much I need?
- Yes, substantially. Only the spending that other income does not already cover has to come from your corpus. If you spend ₹12 lakh a year and receive ₹4 lakh in rent, the corpus only needs to fund ₹8 lakh, so the target falls by a third.