Reviewed by Finin2min Editorial Desk · Last reviewed 11 August 2026
Estimate a withdrawal-rate FIRE target, projected corpus and monthly investment needed to close the gap.
Estimate financial-independence target
A withdrawal-rate rule is a planning heuristic, not a guarantee of lifetime sustainability.
FIRE target at target date
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Projected gap
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Measure
Amount
Inflation-adjusted annual expenses
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Projected corpus
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Required total monthly investment
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How This Is Calculated
The FIRE (Financial Independence, Retire Early) number is calculated by projecting your current annual expenses forward with inflation to your target year, then dividing by your chosen safe withdrawal rate — a commonly used starting reference is around 3-4% per year, though the appropriate rate depends on your investment mix, time horizon and risk tolerance. This gives the corpus size needed to sustainably fund those expenses without depleting the principal too quickly.
Frequently Asked Questions
What is a safe withdrawal rate for FIRE planning?
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A commonly referenced starting point is 3-4% per year (based on historical studies like the "4% rule"), but the right rate for you depends on your asset allocation, how long your retirement needs to last, and how much risk you're willing to take with running out of money versus leaving a larger buffer.
Why does the FIRE number use inflation-adjusted expenses?
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Because your target retirement is likely years away, today's expenses will cost more by then due to inflation — projecting forward gives a more realistic corpus target than using today's expense figure directly, which would understate what you'll actually need.
Does the FIRE number account for taxes on withdrawals?
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Not directly — this calculator estimates the pre-tax corpus needed to sustain your expenses. Actual withdrawals from taxable investments, PF, NPS or other sources may carry different tax treatment, so your real target corpus may need to be somewhat higher to net out to your required post-tax income.
Scope: Estimates the corpus required for Financial Independence / Retire Early (FIRE) using the safe-withdrawal-rate method, and projects the time needed to reach that corpus given current savings and monthly investment.
Calculation logic
FIRE number = Annual expenses in retirement ÷ Safe withdrawal rate (commonly 3–4%, based on the 'Trinity study'-derived convention popularised in FIRE planning, adjustable by the user).
Years to FIRE is computed by projecting the current corpus plus monthly investments forward at the entered expected return rate until it reaches the FIRE number, using standard future-value-of-annuity compounding.
Inputs and assumptions
The 3–4% safe withdrawal rate is a widely cited planning heuristic derived from historical US market studies, not a guarantee of portfolio sustainability in any specific market or time period — the user can adjust it, and the calculator does not assert it as a certainty for Indian markets.
Expected return and inflation rates entered are planning assumptions, not predictions.
Exclusions and edge cases
Does not model sequence-of-returns risk (the impact of poor early-retirement-year returns on corpus longevity) — that requires a more advanced simulation beyond this deterministic calculator.
Healthcare cost inflation (often higher than general inflation) is only reflected if the user adjusts expense assumptions to account for it.
Sources
No specific external regulatory source applies beyond general market-linked instrument mechanics.
Review status: reviewed and approved by CA Nikhil Gupta on 14 July 2026.
Guides on this topic
Background, worked examples and the rules behind these numbers.
Finin2min is not registered with the Securities and Exchange Board of India (SEBI) as an Investment Adviser or as a Research Analyst. This tool performs an arithmetic calculation on the figures you enter and is published for general information and educational purposes only. It is not investment advice, it is not personalised to your financial circumstances, objectives or risk tolerance, and it is not a recommendation to buy, sell or hold any security, scheme or product. Projected values are illustrative and follow directly from the assumptions you supply; actual returns will differ, and past performance does not indicate future results. Consider consulting a SEBI-registered Investment Adviser before acting on any investment decision.