What-If
Pull the dials — work-until age, Social Security timing, spending, returns — then Apply changes to rerun the engine and see how each choice moves your odds, your tax bill, and how long the money lasts. Nothing is saved until you say so.
Person 1 has no salary — treated as retired today. Add Employment & savings in the Plan wizard to move that date.
Person 2 has no salary — treated as retired today.
Single-path projection. Current plan runs out 2058. Monte Carlo odds rerun with each Apply using the same 5,000 futures and seed as the Dashboard verdict — applying a scenario to your plan carries its chance of success straight over, no re-run needed.
Nothing applied yet. Move a dial on the left, press Apply changes, and the engine reruns instantly. Adjust one thing at a time to see what it's really worth.
Save for comparison snapshots this what-if as-is (up to 10) so you can stack it against others on the Compare page. Apply to my plan makes it your official plan everywhere else — including this exact chance of success on the Dashboard, with no re-run.
Need finer control (accounts, individual expenses, filing status)? Use the full plan wizard. Your saved plan is untouched until you choose one of the options above.