Tax & Billing Calculators

Sales tax questions come in two directions and most calculators only answer one. These work both ways: add tax to a net price, or extract the tax already inside a gross figure — the calculation you need when reconciling receipts or invoicing after the fact.

The commission calculator handles flat and tiered structures rather than assuming a single percentage, and the hourly rate calculator works backwards from a target income through unbillable time, holidays and overheads to the rate you would actually have to charge.