Retire with confidence.
Simulate 10,000 futures in seconds.
Actuarial‑grade Monte Carlo simulations estimate how long your nest egg (your retirement savings) could last—and what changes might extend it.
Latest insights
January 25, 2026
Guyton–Klinger uses guardrails to raise, freeze, or cut retirement spending based on market performance. Here’s how it works, plus an interactive backtest.
January 1, 2026
Lower expected returns and non-standard retirement horizons (early retirement, couples, longer lifespans) makes revisiting 4% rule necessary.
December 14, 2025
The financial risk of living too long.
Recent updates
Jan 1, 2026
UpdateNew taxes and payroll modeling, what-if tools, and a cleaner UI
International Tax System, What-ifs / Sensitivity / Optimizers, and cleaner UI
Oct 12, 2025
UpdateSharing is in beta, plus a refreshed inflation model
Sharing feature now in beta, revision to default inflation model
Oct 1, 2025
UpdateActuaPlan is live: a smarter way to plan retirement
ActuaPlan is now live with early-bird offer.
Explore our tutorials for retirement planning
Start with the fundamentals, then go deeper on longevity, inflation, taxes, healthcare costs, and withdrawal strategies—using clear examples and short lessons.
Short lessons
Learn in small steps that build on each other.
What matters most
Longevity, inflation, taxes, healthcare costs, and withdrawals.
Track your progress
Pick a tutorial and come back anytime. Progress saves on this device.
Intermediate and Advanced are in progress.
A beginner-friendly guide to retirement planning that starts with foundational concepts of retirement planning and money, how to grow money, and life after work.
Designed as short, connected reading sessions.
A manageable first pass through the core ideas.
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Chapter 1
Retirement planning as life planning
Start with the life you want and the idea that retirement planning is about ranges, not precision.
Chapter 2
Managing personal finance
Get a simple grip on your money so your plan starts from reality instead of guesswork.
Chapter 3
Growing your money
Learn the beginner investing ideas that matter for long-term goals without getting buried in jargon.
Chapter 4
Life after retirement
See how money works after paychecks stop.
Ready to try it?
See how your plan holds up.
Run the planner when you want to test the numbers, or start with Learn if you want the ideas first.