Contact

Found a bug in a calculator? Have an idea for a new tool? I read everything — send it below.

So I can reply. Never shared, never spammed.
Reporting a wrong number? Include the calculator name and the inputs you used. That's usually enough to reproduce it.

Report a Formula or Tax Rate Issue

Prefer email? Write to [email protected]. If a number looks wrong, compare it against the formulas and sources on the methodology page first — if it still disagrees, it is a bug and I want to know.

Request a New Financial Calculator

Requesting a new tool? Tell me what you'd type into Google to find it. I name pages after real searches, so that helps twice.

Prefer doing it yourself? Try the Coast FIRE calculator or browse all calculators while you wait for a reply.