Retirement is a decades-long cash-flow question: will your savings, plus the income you expect, cover what life costs for as long as you’re around?
This planner walks you through it in six short steps — who you’re planning for, what you’ve saved, and the income and spending you foresee — then projects your finances year by year across a wide range of market and lifespan outcomes, showing at every age how likely you are to end up rich, broke, or dead.
Use it to test whether your plan holds up over the decades ahead, and which adjustments most improve the odds.
Step one · the cast
Who are we planning for?
A couple of quick facts set the stage — they choose the life-expectancy estimates the projection is built on.
Used to pick the actuarial longevity table — nothing more.
Step two · the nest egg
What have you saved so far?
Everything investable — retirement accounts, brokerage, cash. The chart shows how that sum could grow on its own, before any income or spending, in good markets and bad.
Step three · money in
What income is coming?
Add each stream as a monthly amount and when it runs. Salary now, Social Security later — the chart redraws as each one lands.
No income yet — retirement on savings alone. Add one above if that’s not the plan.
Step four · money out
What does life cost?
Start with everyday living, then layer anything with its own timeline — a mortgage that ends, travel that tapers, healthcare that grows.
Nothing extra — everyday living covers it all.
Step five · the dials
Tune the machine
Sensible defaults are already set. Nudge what you know — skip what you don’t. Every dial redraws the projection.
No property in the plan. That’s fine.
Spend exactly as planned, whatever the market does. The purest stress test.
Cut back while the portfolio is under water, spend normally otherwise.
Guyton-Klinger-style guardrails: whenever withdrawals run 20% hotter than where you started, spending steps down 10% — and steps back up when the portfolio runs ahead. Small course corrections instead of one big cut.
The outlook
So… rich, broke or dead?
Working it out…
Each lever solved on its own, holding everything else as entered.
Saves as a scenario in the full calculator, where every number stays editable. Your partner carries over — both views run the same household model, so the numbers match.The full calculator counts a run as failed even if the money gives out after you’re gone, so its success rate can read lower than this one. Guardrails live only in this planner for now — the saved scenario uses fixed spending.