FIRE Calculator
Calculate your FIRE number, years to financial independence, and monthly savings needed — with Lean, Regular, Fat & Coast FIRE.
Load Example
Use real (inflation-adjusted) return for accurate results
4% (US), 3–3.5% recommended for India
Your FIRE Results
FIRE Type Classification (based on your expenses)
—
FIRE Multiplier by Withdrawal Rate
| Withdrawal Rate | FIRE Multiple | Best for | Risk Level |
|---|---|---|---|
| 3.0% | 33× annual expenses | India, 40+ year retirement, high safety | Very Conservative |
| 3.5% | 28.6× annual expenses | India / long retirement horizons | Conservative |
| 4.0% | 25× annual expenses | Classic rule — 30 year US retirement | Moderate |
| 4.5% | 22.2× annual expenses | Shorter retirement with flexible spending | Slightly Aggressive |
| 5.0% | 20× annual expenses | Short retirement (10–20 years) only | Aggressive |
Formulas Used
What Is the FIRE Movement?
FIRE stands for Financial Independence, Retire Early. The goal is to accumulate a portfolio large enough that investment returns can fund your living expenses indefinitely — freeing you from the need to work for money. The movement gained mainstream attention after the book "Your Money or Your Life" (1992) and accelerated with internet communities like r/financialindependence.
The core insight of FIRE is that retirement is not a function of age — it is a function of your savings rate and spending level. Someone saving 50% of their income can retire in roughly 17 years from any starting point, regardless of age.
Types of FIRE
- Lean FIRE: Retiring with a minimal lifestyle — typically below ₹30,000/month (or $40,000/year in the US). Requires strict frugality but the smallest FIRE number.
- Regular FIRE: The standard approach — living comfortably without luxury. Typically ₹50,000–₹1,50,000/month.
- Fat FIRE: Retiring with enough to live lavishly. Usually requires ₹2,00,000+/month spending and correspondingly large portfolios (₹6 crore+).
- Barista FIRE: Partially retire with a small side job covering basic expenses, letting the portfolio grow rather than draw down.
- Coast FIRE: Stop contributing once your portfolio is large enough to grow to your FIRE number on its own by retirement age.
The 4% Rule — and Its Limits in India
The 4% rule is derived from the 1994 "Trinity Study" which tested withdrawal strategies against US market data from 1926–1976. It found that a 4% inflation-adjusted withdrawal had a ~95% success rate over 30 years in US equities and bonds.
For Indian investors, the 4% rule needs adjustment: India's historical inflation has averaged 6–7% (vs US ~3%), and equity risk premiums differ. Most Indian FIRE practitioners use 3–3.5% withdrawal rate — which translates to a FIRE multiple of 28–33× annual expenses instead of 25×.
How Savings Rate Drives FIRE
Your savings rate is the single most powerful lever in FIRE planning. Higher savings means:
- More invested each month (faster portfolio growth)
- Lower expenses (smaller FIRE number needed)
- Both effects compound simultaneously
Going from a 25% savings rate to 50% does not just double your savings — it also halves your FIRE number. This combination can cut the time to FIRE by more than half.
Frequently Asked Questions
Your FIRE number is the portfolio size at which you can retire: Annual Expenses ÷ Safe Withdrawal Rate. Using 4% SWR: FIRE Number = Annual Expenses × 25. If you spend ₹72,000/year, your FIRE number is ₹18,00,000. At a 3% SWR (recommended for India), the same expenses require ₹24,00,000.
The 4% rule (Bengen, 1994) states that withdrawing 4% of your portfolio in year 1 and adjusting for inflation each year has historically provided ~95% portfolio survival over 30 years in US markets. For India, use 3–3.5% due to higher inflation. The 4% rule is a planning guideline, not a guarantee.
Coast FIRE is when your existing portfolio, if left invested without additional contributions, will grow to your full FIRE number by a target retirement age. Once you hit Coast FIRE, you only need to earn enough to cover current expenses. This is particularly valuable if you want to work a lower-stress job without sacrificing your long-term retirement.
Lean FIRE: retire on minimal expenses (under ₹30,000–40,000/month), requiring a smaller portfolio. Fat FIRE: retire with high monthly spending (₹2,00,000+), needing a much larger portfolio. Regular FIRE falls between. Choose your target based on your actual desired lifestyle — not just the fastest path to any retirement.
Years to FIRE uses a future value annuity formula: n = log((FIRE × r + PMT) / (current × r + PMT)) / log(1 + r), where r is the monthly return and PMT is the monthly investment. This calculator does this automatically. Key inputs: FIRE number, current savings, monthly investment, and expected return rate.
Approximate timeline by savings rate (7% real returns): 10% SR → ~43 years; 25% → ~32 years; 50% → ~17 years; 75% → ~7 years. The relationship is non-linear because higher savings rate also means lower expenses (smaller FIRE number). This is why increasing your savings rate is the fastest path to FIRE.
Use a conservative real (inflation-adjusted) return for planning: 5–7% for Indian equities (Nifty long-run ~12% nominal minus ~6% inflation). Use 5% for conservative planning, 7% for moderate. Enter the nominal return here — the calculator uses it directly, so ensure your expenses are also in today's money (not future inflated values) for consistency.
The 4% rule was calibrated for US markets. India's higher historical inflation (~6–7% vs US ~3%) means the real purchasing power erosion is greater. Most Indian FIRE planners use a 3–3.5% safe withdrawal rate, which means needing 28–33× annual expenses instead of 25×. Use the SWR field to customize — this calculator works with any withdrawal rate.