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FIRE Calculator

Retirement

Work out your FIRE number — the corpus that lets investment income cover your expenses — and see how many years of saving and investing it takes to get there.

Free · No sign-up · Private6 min readUpdated 27 July 2026

In short: FIRE (Financial Independence, Retire Early) is reached when your invested corpus is large enough that a safe annual withdrawal — classically 4%, i.e. 25× your yearly expenses — covers your living costs, so paid work becomes optional.

Your inputs

/month
₹60,000
₹10K₹10L

Your current monthly spending

₹10,00,000
₹0₹10Cr

Investable corpus you already hold.

/month
₹50,000
₹0₹20L

What you add to investments each month.

% p.a.
125

Assumed annualised portfolio return.

% p.a.
28

Safe withdrawal rate — 4% is the classic rule

Results

FIRE number

₹1,80,00,000

Years to FIRE

12

Until financial independence

Corpus at FIRE year

₹2,00,08,585

In year 12

Sustainable monthly income

₹66,695

Drawing 4% a year

Corpus vs FIRE target

How your savings and investments compound toward the FIRE number.

Year-wise path to FIRE

Year-wise path to FIRE
YearInvestedCorpusGap to target
1₹16,00,000₹17,60,466₹1,62,39,534
2₹22,00,000₹26,16,560₹1,53,83,440
3₹28,00,000₹35,80,310₹1,44,19,690
4₹34,00,000₹46,65,261₹1,33,34,739
5₹40,00,000₹58,86,660₹1,21,13,340
6₹46,00,000₹72,61,674₹1,07,38,326
7₹52,00,000₹88,09,631₹91,90,369
8₹58,00,000₹1,05,52,291₹74,47,709
9₹64,00,000₹1,25,14,154₹54,85,846
10₹70,00,000₹1,47,22,802₹32,77,198

Corpus compounds annually at the expected return; the gap closes as it grows.

How the FIRE Calculator works

Formula

FIRE number = Annual expenses ÷ (Withdrawal rate ÷ 100); at 4% that is Annual expenses × 25
Annual expenses
Monthly spending × 12
Withdrawal rate
Safe yearly withdrawal, e.g. 4%
× 25
The multiple implied by a 4% withdrawal rate
Corpus(y)
FV of current savings + FV of monthly investments after y years

Step-by-step calculation

Worked with the default values.

  1. 1

    Annual expenses

    ₹60,000 × 12

    = ₹7,20,000

  2. 2

    FIRE number

    ₹7,20,000 ÷ (4% ÷ 100)

    = ₹1,80,00,000

  3. 3

    Corpus each year

    FV(savings) + FV(monthly investments) at expected return

    = compounded annually

  4. 4

    Years to reach FIRE

    First year corpus ≥ FIRE number

    = 12 yrs

How it works

  • Your monthly expenses are annualised and divided by the withdrawal rate to size the FIRE number (annual expenses × 25 at 4%).
  • Your existing savings and ongoing monthly investments are compounded forward year by year at the expected return.
  • The first year your projected corpus meets or exceeds the FIRE number is your estimated years-to-FIRE.

Examples

₹60,000/month expenses, ₹10 lakh saved, ₹50,000/month invested at 12%, 4% rule

FIRE number is ₹1.8 crore; the corpus crosses it in roughly 14 years.

Same expenses but a cautious 3% withdrawal rate

FIRE number rises to ₹2.4 crore (about 33× expenses), pushing the timeline out by a few years.

Understanding the FIRE Calculator

What FIRE actually means

FIRE stands for Financial Independence, Retire Early. The idea is simple: build an investment corpus large enough that a safe annual withdrawal covers your living costs. Once you reach it, paid work becomes a choice rather than a necessity. The movement reframes retirement not as an age but as a number — the point where your money can support you indefinitely.

That number comes from the 25× rule. If you can safely withdraw 4% of your portfolio each year, then a corpus of 25 times your annual expenses should sustain you. Spend ₹6 lakh a year and your FIRE number is ₹1.5 crore; spend ₹12 lakh and it doubles to ₹3 crore. Everything hinges on expenses, not income.

The 4% rule and its critiques

The 4% safe-withdrawal rate came from studies of long-run US market history, where a 4% initial withdrawal adjusted for inflation survived 30 years in almost every scenario. It is elegant, but it travels imperfectly. India’s inflation runs higher and its reliable market data is shorter, so many local FIRE followers use a more conservative 3–3.5%, implying a larger 28–33× corpus.

The other danger is sequence-of-returns risk — a crash in the first years of retirement. Selling units from a fallen portfolio to fund living costs can do lasting damage even if average returns later recover. A lower withdrawal rate and a cash cushion of two to three years of expenses are the usual defences.

Lean, Fat and Coast FIRE

FIRE comes in flavours:

  • Lean FIRE — a frugal lifestyle backed by a modest corpus.
  • Fat FIRE — a generous lifestyle needing a much larger corpus.
  • Coast FIRE — you have invested enough early that compounding alone reaches your number by normal retirement age, even if you never invest another rupee.

Expenses drive the number, not income

The most counter-intuitive lesson is that spending matters more than earning. Every ₹1,000 a month you permanently cut lowers your FIRE target by ₹3 lakh (25× the annual amount) *and* frees that cash to invest. This is why frugal middle-income savers sometimes reach independence before high-earning big spenders. Use this calculator to test the three levers — expenses, monthly investment and expected return — and watch how trimming costs both shrinks the target and pulls your freedom date closer.

Pros

  • Turns a vague goal — "retire early" — into a single, concrete corpus target you can track.
  • The 25× rule is a simple, research-backed way to size financial independence.
  • Rewards a high savings rate, which compounds both the corpus and the years saved.
  • Flexible: adjust the withdrawal rate to model conservative or aggressive plans instantly.
  • Shows the outsized impact of trimming expenses versus simply earning more.

Cons

  • The 4% rule is US-derived and may be optimistic for India’s higher inflation.
  • Assumes a steady return, whereas real markets are volatile and sequence risk bites hardest early.
  • Uses today’s expenses without inflating them, so it can understate the corpus needed decades out.
  • Ignores taxes, healthcare shocks and one-off costs that a real early-retirement budget must cover.

Tips

  • 1Track your true annual expenses first — the FIRE number is only as accurate as that figure.
  • 2Stress-test with a cautious 3–3.5% withdrawal rate to build in a margin of safety.
  • 3Raise your savings rate: it lowers the target and shortens the timeline at the same time.
  • 4Hold 2–3 years of expenses in cash or debt near FIRE to ride out early market falls.
  • 5Keep comprehensive health insurance and a separate medical buffer outside the FIRE corpus.

Frequently asked questions

Everything you need to know about the FIRE Calculator.

What is a FIRE number?
Your FIRE number is the corpus at which a safe annual withdrawal covers your living costs. With the classic 4% rule it equals 25× your yearly expenses — so ₹6 lakh a year in spending implies a ₹1.5 crore target.
What is the 4% safe-withdrawal rule?
It suggests you can withdraw 4% of your corpus in the first year of retirement and adjust that amount for inflation each year, with a good chance the money lasts 30 years or more. A 4% rate is the same as needing 25× your annual expenses.
Does the 4% rule work in India?
It is a starting point, not a guarantee. The rule was derived from long-run US market data, and India’s higher inflation and shorter reliable return history make many planners cautious. A lot of Indian FIRE followers prefer a 3–3.5% withdrawal rate, which implies a larger corpus of 28–33× expenses.
What is sequence-of-returns risk?
It is the danger of a market crash in the first few years after you stop working. Withdrawing from a portfolio that has just fallen sells more units at low prices and can permanently shrink the corpus, even if average returns later recover. A lower withdrawal rate and a cash buffer help manage it.
What are Lean, Fat and Coast FIRE?
Lean FIRE targets a frugal lifestyle with a smaller corpus; Fat FIRE aims for a generous lifestyle and a much larger one. Coast FIRE means you have invested enough early that, even without adding more, compounding alone reaches your number by traditional retirement age.
Why do my expenses matter more than my income?
Your FIRE number is built entirely from expenses, so every ₹1,000 a month you cut lowers the target by 25× that (₹3 lakh) and simultaneously frees up cash to invest. High earners who spend freely often need a bigger corpus than modest earners who live lean.
What return should I assume?
A diversified, equity-heavy portfolio has historically returned around 11–13% a year in India over long horizons, but this varies with market cycles. Use a conservative estimate for the accumulation phase and shift toward a lower, safer return assumption as you near financial independence.
Should I use nominal or inflation-adjusted numbers?
This calculator projects nominal corpus growth against a FIRE number based on today’s expenses. Because both your future expenses and your corpus grow, a common refinement is to use a real (inflation-adjusted) return — expected return minus inflation — for a more conservative timeline.
Do I have to stop working entirely at FIRE?
No. Many people reach financial independence and then choose part-time, freelance or passion work — often called Barista FIRE. Hitting your number simply means paid work becomes optional rather than mandatory.
How can I reach FIRE faster?
The three levers are spending less (which lowers the target and raises savings), investing more each month, and earning a higher return. Cutting expenses is uniquely powerful because it moves both the target and your savings rate at once.

Methodology & sources

How the FIRE Calculator is calculated, and where the underlying rules come from.

How we calculate it

Every result is produced by a single, shared and tested financial-formula library used across the whole site — so the maths is consistent from one calculator to the next. Figures are estimates based on the inputs you enter and standard assumptions (such as regular compounding and constant rates); real-world outcomes vary with taxes, fees and changing rates. All calculations run in your browser — nothing you type is stored or sent to a server.

Sources & references

Editorial policy & disclaimer. FinCalcHub provides free educational tools and estimates — not personalised financial, tax or investment advice. Verify important decisions with a qualified professional. Read our editorial approach, disclaimer and privacy policy.

Last reviewed for accuracy on .

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