About

The price on the tag is never the whole price. Before you can spend $40,000 on a car, you had to earn more than that — income tax, Social Security, and Medicare all take a cut before the money is even yours to spend. Then sales tax, fees, insurance, and financing interest add more on top. And whatever you didn't spend could have grown if you'd invested it instead.

This site puts all of that in one place, for one purchase at a time, using real published tax rates and cited data rather than rules of thumb — see how it works.

It's free, has no login, and nothing you enter leaves your device or is stored on a server — see limitationsfor what that also means it doesn't do yet.

This is an educational estimate, not tax or financial advice.