Know Your Number.
Retire on Your Terms.
See if your money will last. Run 1,000 Monte Carlo simulations to stress-test your plan against real market crashes, recessions, and inflation spikes. US and Swiss retirement systems supported. Free. Private. No signup.
Monte Carlo Projection
1,000 MONTE CARLO RUNS · HISTORICAL RETURNS · INFLATION-ADJUSTED
Every tool, one toolkit
5 CALCULATORS · 1 QUIZ · JOURNALWealth Plan
Map every year from now to retirement: savings, investments, pensions, tax, and drawdown. Full US support (401k, IRA, Roth, Social Security, Medicare) and Swiss pensions. Export to Excel.
FIRE Calculator
Will your savings last 30 years? Run 1,000 Monte Carlo simulations and see your exact success probability. Takes 2 minutes.
Coast FIRE
If you stopped saving today, would compounding still get you there? See your Coast FIRE number in a single chart.
Swiss Pillar 3a
FIRE for Switzerland: AHV, BVG and Pillar 3a modelled together, with tax shields and marginal rates baked in.
Retirement Quiz
Most people get 4 out of 10 right. Test your retirement knowledge with country-specific questions on pensions, tax rules, and withdrawal strategies.
RetireCrunch Journal
Plain-English writing on FIRE math, tax-advantaged accounts, sequence-of-returns risk, and the research behind the numbers.
Every number has a formula you can trust.
The best retirement tool is one that shows its work. We cite the sources behind every assumption and use the same Monte Carlo method as institutional advisors.
Private by Default
Your financial inputs (savings, expenses, returns) never leave your browser — no account, no email captured. Anonymous Google Analytics tracks page views and which features are used so we can improve the tool. See the Privacy Policy for details.
Evidence-Based
1,000 randomized market scenarios per simulation. The same method used by pension funds and financial advisors.
Free Forever
No paywalls, no upsells, no hidden tier. Everything you see is free — forever.
From the Blog
View all articles →Guides to help you plan smarter and retire with confidence.
What Is the FIRE Movement? A Complete Beginner's Guide
Learn how the Financial Independence, Retire Early (FIRE) movement works — from savings rates and investment strategies to the different FIRE paths you can follow.
How to Calculate Your FIRE Number in 5 Minutes
Use the 25× rule and our free Monte Carlo calculator to find out exactly how much you need to retire. Step-by-step guide with examples.
Monte Carlo Simulation for Retirement: Why Average Returns Lie
Discover why average return projections mislead retirees and how Monte Carlo simulations reveal the true range of retirement outcomes.
Your future self will thank you.
It takes 2 minutes. Start with a free Monte Carlo simulation or test your retirement knowledge.
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