Early Retirement FIRE Calculator

FIRE — Financial Independence, Retire Early — compresses all of retirement math into one elegant loop: your savings rate determines both how fast the portfolio grows and how little it needs to support, so the years-to-freedom depend overwhelmingly on that single percentage. This calculator computes your FIRE number (spending × 25, adjustable), your years to reach it from where you stand, and the famous savings-rate table that started a movement.

The Two Equations of FIRE

Notice income never appears — a $60k earner saving half retires as fast as a $300k earner saving half. That's the liberating (and taunting) heart of the movement: the rate is the game.

The Flavors

• Lean FIRE: 25× a frugal budget ($25–40k/yr) — reachable fast, fragile to spending shocks like healthcare.
• Regular FIRE: 25× a normal middle-class budget.
• Fat FIRE: 25× an abundant budget ($100k+/yr) — the long game.
• Coast FIRE: save hard early until compounding alone will fund traditional retirement, then downshift — the Coast FIRE Calculator runs it.
• Barista FIRE: partial independence + part-time work covering the gap (often for the health insurance).

The Hard Parts the Spreadsheet Hides

• The withdrawal rate debate: 4% was validated on 30-year retirements; a 45-year horizon argues for 3.25–3.5%, which raises the target ~15–23%. The dropdown lets you pick your camp — flexibility in bad markets (skipping inflation raises, trimming 10%) is worth more than the decimal chosen.
• Healthcare before 65: the single biggest early-retiree line item; ACA subsidies (MAGI-managed, often via Roth ladders) are the standard strategy — budget it explicitly in your spending figure.
• Accessing money before 59½: solved problems — Roth conversion ladders (see the Roth Conversion tool), 72(t) SEPP payments, taxable brokerage bridges, and Rule of 55. FIRE plans sequence accounts; they don't pay penalties.
• Sequence-of-returns risk: a crash in the first five years hurts far more than one later — cash buffers, bond tents and spending flexibility are the standard defenses.
• The RE is optional: most people who reach FI keep working — differently. The number buys leverage, not necessarily a hammock.

How to Use the Calculator

1. Enter after-tax income, honest annual spending (the number that sets everything), and invested assets.
2. Pick your withdrawal rate camp; keep 5% real return unless you have strong views.
3. Read your number, your years, and your row in the table — then test what a 5-point savings-rate increase does to the date. That experiment converts more people than any blog post.

Frequently Asked Questions

Is the 4% rule safe for a 40+ year retirement?

It's the right starting point, not the final answer: historical success rates dip for very long horizons, which is why many early retirees plan at 3.25–3.5% or build flexibility rules (skip inflation raises after down years). Small part-time income in early years also massively de-risks the plan.

Does my savings rate really matter more than returns?

Over the accumulation decade-plus, yes — you control it directly, it compounds twice (more saved, less needed), and it's immune to market luck. Returns matter more later; rate matters more first.

How do early retirees get money before 59½?

In order of popularity: taxable brokerage first, Roth conversion ladders (convert now, spend penalty-free in 5 years), 72(t) substantially-equal payments, Rule of 55 for 401(k)s, and Roth contributions (always accessible). Penalties are for the unprepared, not the early.

What about health insurance?

ACA marketplace plans with income-managed subsidies are the standard answer — early retirees with controlled MAGI often pay modest premiums. Budget the full unsubsidized cost anyway; it's the plan's honest stress test.

Should Social Security count in my FIRE plan?

As a later-life bonus layer, yes — benefits from your working years still arrive at 62–70 and meaningfully de-risk the post-70 decades. Most FIRE plans treat it as margin rather than foundation.

Is FIRE realistic on an average income?

The math works at any income where spending can sit meaningfully below earnings — geography and housing choices dominate. What's universal is the direction: every savings-rate point buys freedom-years, whether or not you chase the full acronym.

Is my information private?

Yes — every figure computes locally in your browser.

Compute the number, find your row in the table, and run the +5% experiment. Whether you retire at 40 or just gain the leverage of knowing you could, the savings rate you set this month is the whole ballgame.