CALCIDA

FIRE Calculator (Financial Independence)

Written by Calcida Team
Reviewed by Financial Review Process
Last updated: April 2026

Calculations are rooted in standard financial formulas and are provided as educational estimates only. They do not constitute professional financial advice. Results may vary based on actual interest rates and fees. You should verify all numbers with a certified financial professional prior to making significant financial commitments. Read our editorial commitment →

Estimate your FIRE number and how long it may take to reach financial independence based on savings rate.

Built specifically for planners pursuing financial independence and early retirement, this engine analyzes Annual expenses, Safe withdrawal rate (SWR), Savings rate to output estimated fire number and progress toward the goal.

Context:Retirement CalculatorsMain DirectoryRetirement Calculator: Plan Your Financial FutureSavings Rate Calculator

Estimated FIRE Number

$1,200,000
Time to reach target: 17 years
Advertisement
Financial Insight Placement Zone

How This Calculator Works

This FIRE calculator estimates two things: your FIRE number (the portfolio size needed to retire) and the number of years to reach it given your current savings rate, income, and investment return assumptions.

The FIRE Formula

FIRE Number = Annual Expenses × 25
Years to FIRE = f(Savings Rate, Return Rate, Current Portfolio)

The 25× multiplier comes from the 4% Safe Withdrawal Rate (1 ÷ 4% = 25). Your portfolio grows through contributions plus investment returns until it reaches the target.

The calculator runs a year-by-year projection: each year, your portfolio grows by the return rate and increases by your annual savings, until it exceeds your FIRE number.

Advertisement
Financial Insight Placement Zone

Formula

FIRE Number = Annual Expenses / SWR
SWR
safe withdrawal rate (e.g., 4% = 0.04) Description

Example Calculation

Example: Targeting $60,000/Year in Retirement (2026)

Annual expenses in retirement$60,000
FIRE number (25× rule)$1,500,000

Scenario A: 30% Savings Rate

Annual income$100,000
Annual savings$30,000
Years to FIRE (7% return)~26 years

Scenario B: 60% Savings Rate

Annual income$100,000
Annual savings$60,000
Years to FIRE (7% return)~14 years

*Doubling your savings rate cuts your timeline nearly in half.

Advertisement
Financial Insight Placement Zone

The FIRE Roadmap: From Paycheck to Financial Freedom

  1. Calculate your FIRE number. Estimate your annual retirement expenses (include healthcare — a major cost before Medicare eligibility at 65) and multiply by 25.
  2. Maximize tax-advantaged accounts first. 401(k), Roth IRA, HSA — these reduce your tax bill now and/or in retirement. The annual savings on taxes accelerate your timeline.
  3. Invest consistently in low-cost index funds. Total stock market or S&P 500 index funds have historically returned 7–10% annually. Keep expense ratios below 0.1%.
  4. Track your savings rate, not just your portfolio balance. Your savings rate determines how fast you accumulate wealth — it's the number to optimize.
  5. Plan for sequence-of-returns risk. A market crash early in retirement can devastate a portfolio. Maintain 1–2 years of cash, consider a bond tent, and be flexible with withdrawal rates in down years.

Related Retirement Calculators

4% Rule CalculatorModel safe withdrawal rates from your portfolio.Roth IRA CalculatorProject your tax-free retirement account growth.Savings Rate CalculatorCalculate your current savings rate and set goals.Compound Interest CalculatorVisualize how your investments compound over time.
Advertisement
Financial Insight Placement Zone

Continue Your Analysis

Retirement Calculator: Plan Your Financial FutureCalculate now →Savings Rate CalculatorCalculate now →Budget Calculator: 50/30/20 RuleCalculate now →4% Rule CalculatorCalculate now →Roth IRA CalculatorCalculate now →Mortgage Payment Calculator with Taxes and InsuranceCalculate now →

Toolkit

Advertisement
Financial Insight Placement Zone