What the model knows — what you told us, what’s standing in, and what’s still open. Every plan starts from this page.
Start with the basics that shape everything else. The rest fills in on this page as you go.
No sign-up needed to start — your data is backed up privately to your account.
Calculations run in your browser. Your data is stored on this device (IndexedDB) and backed up automatically to your account over HTTPS, isolated to you. No sign-up is required to start. You can export or delete everything — device and cloud — at any time.
Sets your age exactly — how many years the model projects to and through retirement.
State income-tax rules vary widely; the model uses yours.
A partner adds their own fields — every question notes whose it is.
Sets the tax brackets and thresholds the model applies.