FIRE Calculator

Financial independence isn't a vibe — it's a date. This calculator finds the earliest age your plan actually survives, then models the messy early-access plumbing that lets you reach the money before 59½.

FIRE — financial independence, retire early — rests on one number most calculators skip: not "how big is my nest egg," but "what's the earliest age I could stop working and still not run out?" That's a harder question, because it's not a single multiplication. It depends on your savings rate now, how a decades-long retirement interacts with markets, when Social Security eventually starts, and — the part that trips up nearly every spreadsheet — how you actually get at your money in the gap years before traditional retirement accounts open up.

Savings rate, not salary, sets the date

The lever that moves your FIRE date most is the share of income you save, because it cuts both ways: every extra dollar saved is a dollar of spending you no longer have to fund for the rest of your life. The rough target is your "FI number" — about 25× your annual spending, the flip side of a 4% withdrawal. But 25× is the finish line, not the plan. The real question is the path: given what you have and what you save, which specific year does the math first clear? That's what the goal-seek verdict below answers with a real age.

The early-access problem the spreadsheets miss

Retire at 50 and you face a decade-plus gap before penalty-free 401(k)/IRA withdrawals at 59½ and before Medicare at 65. Bridging it is where FIRE plans live or die. A 72(t) SEPP or the Rule of 55 can unlock tax-deferred money early without the 10% penalty; a taxable brokerage covers the years before that; and an ACA bridge keeps you insured — often heavily subsidized — until Medicare. retireclarity models these explicitly, so the "earliest age" it reports is one you could actually execute, not one that assumes your money is magically reachable.

A real earliest-retirement verdict

The sample below is Alex, 38, saving hard toward an early exit. The calculator runs a goal-seek across retirement ages and reports the earliest one that survives to life expectancy — the "on track to retire at N" verdict — alongside the year-by-year projection behind it. Change the savings rate, the spending, or the target age and the verdict updates live. That's the difference between a FIRE number and a FIRE plan.

Or jump straight to the full retirement calculator.