Calculator guide
Who this calculator is for
Shoppers, freelancers, ecommerce sellers and small businesses that need fast tax-inclusive and tax-exclusive price checks for US states.
Add US state and local tax to a net price, or remove tax from a gross price to verify business receipts.
Formula used
Tax amount = net price x tax rate. Reverse tax base = gross price / (1 + tax rate).
The calculator keeps the math visible so users can understand what changed when they adjust rate, time, contribution, tax rate or loan amount.
Example: $100 item with 8.25% Texas Sales Tax
How to get a useful result
For the best estimate, use realistic rates, verify lender or tax assumptions, and run at least one conservative scenario. This makes the page more useful than a bare calculator and helps visitors stay longer because they can compare outcomes instead of leaving after one number.
Frequently asked questions
Nexus is the connection between a business and a state that requires the business to collect and remit sales tax. It is usually triggered by physical presence or crossing a sales threshold.
Yes, if you enter a ZIP code, it estimates local county and city tax surcharges that stack on top of the base state rate.
It depends on the state. Some states tax shipping charges, while others do not if shipping is stated separately on the invoice.
Use the 'Remove tax' (inclusive) mode. It divides the gross total by (1 + tax rate) to find the original pre-tax amount.