Find out exactly when you can achieve financial independence. Enter your income, expenses, and current savings — the calculator shows your FIRE number, projected retirement date, and how small changes to your savings rate can shave years off the timeline.
Pro tip: Your savings rate matters more than your investment returns. At a 50% savings rate, you can retire in roughly 17 years regardless of income level. At 25%, it takes 32 years. The math works because saving more simultaneously grows your portfolio AND proves you can live on less — both sides of the equation improve.
Coast FIRE
The amount you need saved today so investment growth alone reaches your FIRE number by traditional retirement age (65) — no more contributions needed.
Barista FIRE
Model partial retirement: work part-time to cover living expenses while your investments grow untouched to your full FIRE number.
Monte Carlo Simulation
Probability of your plan succeeding across thousands of simulated historical market scenarios.
What Is the FIRE Movement? (Financial Independence Explained)
FIRE stands for Financial Independence, Retire Early. The core idea is straightforward: save and invest aggressively so that your investment portfolio generates enough passive income to cover your living expenses indefinitely. Once you reach that point — your “FIRE number” — work becomes optional rather than mandatory.
Financial independence does not require a six-figure salary. The movement emphasizes that the gap between income and spending determines timeline far more than raw earnings. Someone earning $60,000 who spends $30,000 will reach FIRE faster than someone earning $200,000 who spends $180,000, because the savings rate — not income — drives the math.
The 4% Rule: How Much Do You Need to Retire?
The 4% rule originates from the Trinity Study, which analyzed historical stock and bond market returns to determine a sustainable withdrawal rate over a 30-year retirement. The conclusion: withdrawing 4% of your portfolio in the first year of retirement, then adjusting for inflation each year, survived roughly 95% of all historical 30-year periods.
In practical terms, the 4% rule means you need 25 times your annual expenses saved and invested. If you spend $40,000 per year, your FIRE number is $1,000,000. If you spend $60,000, it becomes $1,500,000. This calculator lets you adjust the withdrawal rate up or down to match your risk tolerance and planned retirement length.
Lean FIRE vs Fat FIRE: Finding Your Number
The FIRE community recognizes several lifestyle tiers. Lean FIRE targets a minimal budget — typically 80% of current spending — and is ideal for people comfortable with frugal living. Regular FIRE maintains your current lifestyle. Fat FIRE plans for an upgraded lifestyle at roughly 150% of current expenses, giving you room for travel, hobbies, and unexpected costs without stress.
Which tier is right depends on your personality, health needs, family plans, and geographic flexibility. Many people start targeting Lean FIRE for an early escape hatch, then continue working part-time toward Regular or Fat FIRE for added security.
Why Savings Rate Matters More Than Income
The single most powerful lever in the FIRE equation is your savings rate. A higher savings rate has a dual effect: it increases the amount flowing into investments while simultaneously proving you can live on less — which lowers the FIRE number you need to reach. This double-sided benefit is why someone saving 50% of their income can reach financial independence in about 17 years, while someone saving 20% needs closer to 37 years.
Investment returns matter, but they are largely outside your control. Your savings rate is the one variable you can directly influence today. The “Savings Rate Impact” chart above illustrates this relationship clearly — experiment with different rates to see the dramatic effect on your timeline.
Coast FIRE: The Part-Time Retirement Strategy
Coast FIRE is a milestone where you have saved enough that compound growth alone will carry your portfolio to your full FIRE number by traditional retirement age, even if you never invest another dollar. Once you hit Coast FIRE, you only need to earn enough to cover current expenses — opening the door to lower-stress, part-time, or passion-driven work decades before full retirement.
A related concept is Barista FIRE, where you leave your full-time career and take part-time work (the name refers to the stereotype of working at a coffee shop for health insurance). The part-time income covers daily expenses while your invested assets grow untouched. Use the subscriber tools above to model both scenarios with your own numbers.
Looking for more financial planning tools? Try the Personal Finance calculators for compound interest, debt payoff, and budgeting tools that complement your FIRE plan.