How do I calculate sales tax by state?
Calculate a sales-tax total from a verified state and local rate, while keeping taxability, sourcing, and ZIP-code limits visible.
Multiply the taxable price by the combined rate that legally applies to the transaction, then add the tax. A state headline rate is only a starting point: city, county, district, product, delivery address, and transaction date can change the answer.
Sales Tax Calculator by State — Add or Remove Tax
Change the prefilled example to match your situation. Inputs stay in your browser.
Use an exact receipt or local rateOptional
The selected rate is a population-weighted state average, not an address-level quote. Product exemptions and local districts can change the exact amount. Review the 2026 rate source.
Why this answer depends on your details
Users search by state because it is easy to name, but many sales-tax decisions are local. The calculator should make rate verification part of the workflow instead of inventing a ZIP-code answer.
How to work through it
- Confirm whether the item or service is taxable.
- Determine the applicable sourcing address and transaction date.
- Look up the combined state and local rate with the authority for that jurisdiction.
- Enter the pre-tax price and verified rate.
- Check rounding, exemptions, marketplace collection, and filing requirements separately.
Common mistakes
- Using a statewide rate for a local transaction.
- Assuming a ZIP code uniquely identifies a tax jurisdiction.
- Treating an exact rate as proof that the product is taxable.
- Ignoring delivery, marketplace, resale, or exemption rules.
Frequently asked questions
Can I use a ZIP code to find the sales-tax rate?
A ZIP code can be a rough starting point, but it does not reliably define overlapping tax districts. Use an official address or jurisdiction lookup for a collection decision.
Does this page cover all 50 states?
It provides the arithmetic for any verified rate. The applicable rate and taxability must be checked with the relevant state and local authority.