Coast FIRE Calculator
The corpus that makes retirement inevitable without another rupee saved — coast number by age and return.
Formula
Disclaimer: Indicative math using recently applicable rates and rules — verify current-year figures. Not financial or tax advice.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
Need coast fire calculator results fast? Skip the spreadsheet and get a clear, defensible answer in one step — free, private and instant, recalculating live as you change any input.
About Coast FIRE Calculator
Coast FIRE asks the most liberating question in personal finance: how much do I need invested TODAY so that, with zero further contributions, compounding alone delivers my retirement? A 30-year-old targeting $1.5M at 60 needs just ~$347,000 invested now at a 5% real return — cross that line and every subsequent paycheck belongs entirely to the present: career downshifts, passion work, parenthood years, all de-risked. The math is one division, but the inputs deserve care: use REAL (after-inflation) returns if your target corpus is in today's purchasing power (5% real ≈ 8% nominal at 3% inflation; Indian planners at 6% inflation should use 4-6% real for equity); and note the brutal age-sensitivity — the same target needs ~$211k at 25 but ~$570k at 40. Coast FIRE is overwhelmingly a young person's strategy, which is exactly its motivational power for aggressive early saving. Where it fits the FIRE family: leaner than Barista FIRE (which adds part-time income to cover current expenses), far more achievable than full FIRE (no 25× corpus needed NOW) — and crucially, it's a checkpoint, not a finish line: most people who hit coast keep saving anyway, but negotiate work-life differently knowing the floor exists. The risk to respect: 30 years of 'coasting' assumes you genuinely won't touch the corpus — seal it mentally (and structurally: retirement accounts' friction helps) before granting yourself the downshift.
How to use Coast FIRE Calculator
- 1Enter Corpus needed at retirement, Current age (years), Retirement age (years), Expected real return (%) into the Coast FIRE Calculator.
- 2The result is computed automatically using Coast number = retirement corpus ÷ (1 + real return)^years remaining — once invested assets cross it, retirement funds itself — there is no button to press; it updates live as you type.
- 3Change any input to model a different scenario, then use “Copy result link” to share the exact numbers.
Why use Coast FIRE Calculator?
- ✓Computes coast fire calculator instantly with the correct formula — no spreadsheet needed
- ✓100% free and unlimited, with no sign-up, login or paywall
- ✓Runs entirely in your browser, so the figures you enter are never uploaded or stored
- ✓Shows the formula, a live worked example and references so you can defend the number
Frequently asked questions
Coast FIRE aur normal FIRE me kya farak hai?+
Full FIRE = aaj hi 25× expenses ka corpus → kaam optional ABHI. Coast FIRE = aaj sirf woh seed jo compounding se retirement tak target ban jayegi → kaam abhi bhi chahiye (kharche ke liye) par retirement-saving ka pressure ZERO. Coast 5-10× aasaan milestone hai aur career-flexibility ka asli unlock wahi hai — isliye young savers ka favourite checkpoint ban gaya hai.
Real return kyun use karna hai nominal kyun nahi?+
Kyunki target corpus aap aaj ki purchasing power me sochte hain ($1.5M 'aaj jaisa'). Nominal 8% use kiya to inflation ka jhooth jud jata hai. Formula me ya to (real return + today's corpus) ya (nominal return + inflated corpus) — ek hi pair chalega. Simple raasta: equity ke liye 4-6% real maan kar yahi calculator chalaiye.
Coast number hit karne ke baad sach me saving band kar dein?+
Kar SAKTE hain — wahi point hai — par zyadatar log nahi karte: woh sirf zyada azaadi se kaam chunte hain (kam pay wali meaningful job, freelancing, sabbatical). Practical hybrid: coast cross karne ke baad retirement-saving minimum par, baaki paisa life-goals me. Ek hi pakki shart: coast corpus ko HAATH NAHI lagana — usi par poori theory tiki hai.
Market crash hua to coast status chala jayega?+
Temporarily haan — coast ek LINE hai jo portfolio ke saath oscillate karti hai. Isliye buffer ke saath declare karein (target ka 110-120% par) ya crash me thodi saving resume kar dein. Ulta bhi sach: bull market me aap coast se aage nikal kar 'past-coast' ho jaate hain jahan compounding target se ZYADA dene wali hai. Line ko yearly check karein, daily nahi.
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