🔥 FIRE Calculator

Financial Independence, Retire Early — find your timeline

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Calculate Your FIRE Timeline

Your yearly living expenses (all costs)
Real return (after inflation)
Standard: 4% (adjust for risk tolerance)
Years to Financial Independence
—
Savings Rate—
FIRE Target (FV)$0
Annual Savings$0
Monthly Retirement Income$0
FIRE Age—

Savings Rate vs. FIRE Timeline

Your savings rate is the single most powerful lever for early retirement. See how different rates change your timeline:

Savings RateAnnual SavingsFIRE TargetYears to FIFI Age

Portfolio Growth to FIRE

What Is FIRE?

FIRE (Financial Independence, Retire Early) is a movement built on one core idea: save aggressively, invest wisely, and reach the point where your investments generate enough passive income to cover your living expenses — so work becomes optional, not mandatory.

The math is straightforward: when your portfolio reaches 25x your annual spending (based on the 4% withdrawal rule), you've hit your FIRE number. At that point, you can theoretically live off investment returns indefinitely without depleting your nest egg.

The FIRE Formula

Your savings rate — the percentage of income you save each year — is the most important number in FIRE planning. Here's why it matters so much:

Savings RateYears to FIRE (from $0)What It Means
10%~51 yearsStandard retirement trajectory
25%~32 yearsSaving more than most, but still working into your 60s
50%~17 yearsHalf your income saved — FIRE in under 20 years
65%~10.5 yearsAggressive savings — FIRE in about a decade
75%~7 yearsExtreme frugality — FIRE in under 10 years

Assumes 5% real returns and 4% withdrawal rate. Starting from $0 savings.

Types of FIRE

TypeTargetDescription
Lean FIREFrugal lifestyle ($25-40K/year)Minimal spending, maximum savings. Reach FI faster but live lean.
Regular FIREModerate lifestyle ($40-80K/year)The balanced approach. Save 50%+ and maintain a comfortable but not extravagant life.
Fat FIRELuxurious lifestyle ($100K+/year)Requires a larger nest egg ($2.5M+), but retirement includes travel, hobbies, and comfort.
Barista FIREPartial independenceCover most expenses with investments, but work part-time for benefits and extras.

The 4% Rule Explained

The 4% rule (also known as the "Trinity Study" rule) states that if you withdraw 4% of your portfolio in the first year of retirement and adjust that amount for inflation each subsequent year, your portfolio should last at least 30 years with a high probability. This means:

  • FIRE Number = Annual Spending × 25 (because 1/0.04 = 25)
  • If you spend $40,000/year, your FIRE number is $1,000,000
  • If you spend $60,000/year, your FIRE number is $1,500,000

Some FIRE planners use a more conservative 3.5% withdrawal rate (FIRE number = spending × 28.6) for additional safety margin, especially for early retirees who may need their portfolio to last 40-50 years.

How to Accelerate Your FIRE Timeline

  1. Increase your savings rate: Every 10% increase in savings rate can shave 6-8 years off your FIRE timeline. Cut unnecessary expenses and negotiate bills.
  2. Boost your income: Side hustles, career advancement, or entrepreneurship. More income = more savings without cutting spending.
  3. Invest for growth: Low-cost index funds (like S&P 500) have historically returned ~10% nominal / ~7% real. Avoid high-fee investments that drag returns.
  4. Minimize taxes: Use 401(k), IRA, and HSA accounts for tax-advantaged savings. Tax efficiency can add years to your timeline.
  5. Reduce spending sustainably: Don't cut to the point of misery. Find the spending level that gives you a life you enjoy while maximizing savings.

Frequently Asked Questions

Is FIRE realistic for average income earners?
Yes, but it requires commitment. A $60,000 earner saving 50% ($30,000/year) can reach FIRE in about 17 years with $500K in savings. The key is optimizing both sides — earning more and spending less — not just one.
What if the market crashes right after I reach FIRE?
This is called "sequence of returns risk." Mitigate it by: (1) using a 3.5% withdrawal rate instead of 4%, (2) keeping 1-2 years of expenses in cash/bonds as a buffer, (3) having a flexible spending plan that reduces withdrawals during downturns, and (4) considering Barista FIRE as a safety net.
Should I use 4% or 3.5% withdrawal rate?
The 4% rule is based on 30-year retirements. If you're retiring early (40+ years of retirement), 3.5% is safer. It gives you a larger margin for market downturns and longer life expectancy. Our calculator defaults to 4% but lets you adjust — try 3.5% to see the impact.
Does FIRE mean I have to stop working entirely?
No! FIRE means work becomes optional. Many FIRE achievers continue working — but on projects they love, part-time, or as volunteers. Financial independence gives you the freedom to choose, not the obligation to quit.