FIRE Calculator 2026
Plan your path to Financial Independence and Retire Early. Calculate your FIRE number, estimate years to freedom, and see how much to save monthly.
Your Inputs
Age & Timeline
Finances
Market Assumptions
Portfolio Mix
Your FIRE Results
FIRE Number
$1,250,000
Portfolio needed (today's $)
Years to FIRE
15 years
You'll reach FIRE at age 45
Monthly Savings Needed
$2,000
To reach FIRE by target age
Safe Annual Withdrawal
$50,000
Income in retirement (today's $)
Portfolio Growth Projection
Year-by-Year Breakdown
| Age | Year | Contributions | Growth | Portfolio |
|---|
How This Calculator Works
This FIRE calculator uses established financial formulas to project your path to financial independence:
- Real Return Rate: We adjust your expected investment return for inflation using the Fisher equation:
rreal = (1 + rnom) / (1 + inflation) - 1 - Future Value with Contributions: Your portfolio grows via compound interest plus regular contributions:
FV = P0 × (1 + r)t + C × [(1 + r)t - 1] / r - FIRE Number (Rule of 25): Annual expenses ÷ SWR = target portfolio. With a 4% SWR, this equals expenses × 25.
- 4% Rule (Safe Withdrawal Rate): Based on the Trinity Study and Bengen's research of U.S. market returns since 1926, showing that a 4% initial withdrawal rate (adjusted for inflation annually) sustained portfolios with 50-75% stocks over 30-year periods.
All results are shown in today's dollars (inflation-adjusted). This is a planning estimate, not financial advice. Past market performance does not guarantee future results.
The 4% rule and safe withdrawal rates explained
The 4% rule is the foundation of most FIRE math. It comes from research showing that a retiree who withdraws 4% of their portfolio in the first year, then adjusts that amount for inflation each year after, had a very high chance of not running out of money over a 30-year retirement. That is why your FIRE number is often estimated as 25 times your annual spending: 4% of 25 times your expenses equals exactly one year of expenses. The longer your retirement horizon, the more conservative you may want to be. Many early retirees who could spend 50 or more years in retirement use a 3.25% to 3.5% withdrawal rate instead, which raises the target multiple to roughly 28 to 31 times annual spending. The calculator above lets you test how sensitive your number is to the withdrawal rate you assume.
Lean FIRE, Fat FIRE, Coast FIRE, and Barista FIRE
FIRE is not one-size-fits-all. Lean FIRE means retiring on a deliberately minimal budget, often under typical middle-class spending, which lets you reach independence faster but leaves little margin. Fat FIRE aims for a generous lifestyle and therefore a much larger portfolio. Coast FIRE is reached when your existing investments will grow into a full retirement nest egg by traditional retirement age without any further contributions, so you only need to cover current expenses from here on. Barista FIRE blends part-time work, often for health benefits, with partial portfolio withdrawals. Knowing which version you are targeting changes both your number and how aggressively you need to save today.
Inflation and sequence-of-returns risk
Two forces can derail an early retirement. Inflation quietly raises your cost of living every year, which is why your FIRE number should be based on real, inflation-adjusted returns rather than headline market averages. Sequence-of-returns risk is the danger of a major market drop in the first few years after you retire, when withdrawing from a shrinking portfolio can do permanent damage. Common defenses include keeping one to three years of expenses in cash or bonds, staying flexible enough to trim spending in down years, and building in a modest buffer above your bare-minimum number. Planning for these risks is what separates a fragile early retirement from a durable one.
Which accounts to prioritize on the path to FIRE
Where you invest matters as much as how much. A typical priority order is to capture any employer retirement match first because it is free money, then pay down high-interest debt, then fund tax-advantaged accounts such as a 401(k), IRA, and Health Savings Account. Because early retirees need money before traditional retirement age, many also build a taxable brokerage account or use strategies like a Roth conversion ladder to access funds penalty-free before age 59½. Balancing tax-advantaged growth with accessible bridge funds is one of the most important planning steps on the road to financial independence.
Frequently Asked Questions
Disclaimer: This calculator provides estimates for educational purposes only. It does not constitute financial, tax, or investment advice. The 4% rule is based on historical data and is not a guarantee of future results. It does not model rules specific to retirement accounts (401k, IRA), Net Investment Income Tax (3.8%), Medicare surtaxes, or early withdrawal penalties. Consult a qualified financial advisor for personalized retirement planning.
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