FIRE Calculator (Financial Independence, Retire Early)
Estimate how large a corpus you may need to cover inflation-adjusted spending at your target retirement age—using Lean FIRE (20×), classic FIRE / 4% rule (25×), and Fat FIRE (50×). Add a Coast FIRE target and compare a simple savings projection to your classic FIRE number.
Include rent or EMI, lifestyle costs, and irregular expenses averaged per month.
Coast FIRE (optional)
The age by which you want your investments large enough to reach your classic FIRE number only through compounding—no new retirement contributions after that point.
Clamped between current age and retirement age.
Path to FIRE (illustrative)
Projects a single ending balance at your retirement age from today’s corpus and yearly investments with a yearly step-up. Does not model taxes or irregular cash flows.
Classic FIRE (25× / 4% rule)
₹24,42,34,469
Lean FIRE (20×)
₹19,53,87,575
Fat FIRE (50×)
₹48,84,68,938
Coast corpus (@ 50)
₹13,85,85,197
Spending snapshot
- Years to retirement
- 25
- Annual expenses (today)
- ₹18,00,000
- Annual expenses at age 55
- ₹97,69,379
Projection vs classic FIRE
- Projected corpus at retire
- ₹18,49,60,754
- Gap to classic FIRE (if positive)
- ₹5,92,73,715
Projection uses end-of-year contributions with the return you enter; real portfolios vary with asset mix and fees.
What is FIRE and why plan for it in India?
FIRE—Financial Independence, Retire Early—is a way to translate today's spending into a concrete portfolio goal. Instead of picking a random crore figure, you tie the target to how much you expect to spend each year after you stop earning a salary, then use withdrawal multiples (often paired with the well-known 4% rule) to estimate corpus in Indian rupees.
In India, inflation, healthcare, family responsibilities, and tax treatment of different accounts mean any spreadsheet or calculator should be a starting point. This page focuses on expense inflation and simple multiples so you can compare lean, standard, and cushioned lifestyles before you refine the plan with a professional or your own detailed model.
How this calculator works
- It converts your monthly expenses to annual spending and grows that amount by your inflation rate until your chosen retirement age.
- Lean FIRE uses a 20× multiple of that future annual expense—often discussed alongside tighter budgets or part-time work.
- Classic FIRE uses 25×, aligned with a 4% initial withdrawal on the portfolio.
- Fat FIRE uses 50×, implying a smaller withdrawal rate relative to the corpus for more discretionary spending.
- Coast FIRE discounts your classic FIRE target from retirement back to your coast age using the nominal return you assume for the coast phase—so you can ask how much you need saved by a given birthday for growth alone to finish the job.
Related tools on ZeroKhata
Pair this page with a full retirement corpus model and withdrawal planning:
- Retirement corpus calculator for longevity, SIP, and decumulation-style estimates in rupees.
- After you have a FIRE target, model how many years a corpus may last at different safe withdrawal rates so drawdown risk is not an afterthought.
Frequently asked questions
What does FIRE mean?
FIRE stands for Financial Independence, Retire Early: saving and investing so that investment income or planned withdrawals can cover living costs, making paid work optional before a typical retirement age.
Why multiply future annual expenses by 25?
Dividing 100% by 4% gives 25. The idea is that withdrawing 4% of the portfolio in year one of retirement—then adjusting for inflation—was historically a starting point in some U.S. studies. Use it as a conversation starter, not a promise.
What is Lean FIRE vs Fat FIRE?
Lean FIRE targets a smaller corpus consistent with a leaner retirement budget (here, 20×). Fat FIRE targets more cushion and lifestyle spending (50×). Many families end up between those poles.
What is Coast FIRE?
Coast FIRE is the balance needed at an earlier age so that, without new retirement contributions, compounding can reach your classic FIRE number by the date you actually retire. You might still earn to cover current bills, but retirement saving is "done" in the model.
How should I pick inflation?
Long-term CPI-type inflation in India is often modeled in the mid-single digits for broad expenses, but education and healthcare can be higher. Running the calculator twice with conservative and stress-case inflation is a simple sensitivity check.
Does this include EPF, NPS, PPF, rental income, or pension?
No. Treat employer provident fund, National Pension System, rental yield, and annuities separately or add their present value into the corpus field in the projection block for a rough net picture.
Is early retirement realistic on a salary in India?
Early retirement depends on savings rate, investment returns, spending level, and long-term obligations—not salary alone. Higher income helps, but expense control and consistency matter equally in reaching a FIRE number.
What about sequence-of-returns risk?
Poor returns in the first years after you retire can increase failure risk for fixed withdrawal rules. In practice, people keep cash buffers, reduce spending in weak markets, or hold more stable assets early in retirement. This tool does not simulate market paths.
Should children's education be in my FIRE number?
Major goals are often funded as separate sinking funds so education or wedding spending does not force unnecessary draws from the retirement portfolio. Include only what you truly expect to fund from the FIRE corpus itself.
How often should I revisit my FIRE number?
At least once a year or after large life changes (job, city, loan, health). Expenses, inflation experience, and portfolio balances all move; the FIRE number should move with them.