Plan your escape.

Know the exact day you can retire.

PlanFIRE is a FIRE-native retirement planner — model your runway, stress-test against real market history, and watch your financial-independence date update as you plan.

Free forever · Open source · Private by design.

1928→today
real market data
1000s
Monte Carlo paths
60+ yrs
projected in seconds
Private
never sold

Everything you need to reach FI

From your first projection to stress-testing against a century of real markets — the whole path to financial independence, in one place.

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Projection engine

See your savings runway and financial-independence date update in real time as you tune income, spending, and returns.

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Plan comparison

Model housing moves, retirement ages, and what-ifs side by side.

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Flexible spending controls

Tier expenses as essential, discretionary, or luxury — then model tightening the belt in a downturn by cutting discretionary and luxury spending until markets recover.

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Monte Carlo confidence

Run thousands of randomized market paths and see the odds your money outlives you.

AI Co-pilot

More than a chatbot — it reads your live plan and drives it for you. Ask ‘Can I retire at 52?’ and it’ll retune your retirement age, Social Security timing, return and inflation assumptions, and downturn cuts — or build a whole new scenario — each applied with one tap.

Time Machine

Replay real market eras since 1928 — Stagflation, the GFC, the Long Bull — on your actual portfolio.

From numbers to a plan in minutes

1
Add your numbers

Income, spending, savings, accounts — the raw material of your plan.

2
Model scenarios

Retirement age, housing, market assumptions. Tweak and compare freely.

3
See your FIRE date

The exact date you're free — with success odds and years of runway.

Frequently asked questions

Completely. PlanFIRE is free and open source — every feature, including Monte Carlo, the AI Co-pilot, and the Time Machine, is unlocked for everyone. No paid tier, no upsell.

Yes. Your figures are stored on your account and mirrored to your browser. We never sell or share your financial data.

Financial Independence, Retire Early — the point where your investments cover your living expenses, so work becomes optional.

No. You enter the numbers yourself — nothing is auto-connected.

Yes — choose ‘Continue as guest’. Your work is saved locally and carried into your account when you sign up.

Yes — the whole project is open source. You can self-host it, read the code, and contribute.