FIRE (Financial Independence, Retire Early) Calculator
Determine your FIRE Number and calculate how many years until you achieve complete financial independence based on your current savings rate and annual expenses.
Sensitivity Analysis
Evaluate how variations in key operational drivers impact FIRE Target Net Worth.
| Sensitivity Case | Assumption Shift | Driver Value | FIRE Target Net Worth | Impact vs Base |
|---|
Formula & Methodology
FIRE Number = Annual Expenses * 25Annual ExpensesBaseline annual spending required to live comfortably.
Annual IncomeNet income after taxes.
Savings Rate (%)(Income - Expenses) / Income * 100.
Practical Worked Example
An engineer earns Rs 18,00,000 annually, spends Rs 7,20,000 (60% savings rate), and has Rs 25,00,000 invested at 10% returns.
Interpretation & Industry Benchmarks
FIRE movement math is driven by the relationship between annual spending and savings rate.
Extreme savings rate leads to rapid early retirement.
Sustainable lifestyle with solid retirement speed.
Industry Nuance: Lean FIRE targets bare-bones spending; Fat FIRE budgets for luxury travel and high discretionary lifestyle in retirement.
Analytical Limitations
- Does not account for large one-off capital expenses like buying a home or funding children’s marriages.
Frequently Asked Questions
What is the 4% rule?
The 4% rule states you can safely withdraw 4% of your initial retirement portfolio (adjusted for inflation each year) with low risk of depleting capital over 30 years.