Pick a state to prefill its state sales tax rate, add your county/city rate if needed, and see the tax and tax-included total update live. A reverse calculator strips sales tax out of a tax-included price. Defaults to US dollars.
The actual rate at a checkout address is the state rate plus county, city and special-district taxes. Those vary by ZIP code, so enter the exact local rate yourself rather than guessing — see FAQ for how to look it up.
Pre-tax price = total ÷ (1 + rate). Sales tax = total − pre-tax price.
State-level rates below are current as of July 1, 2026, per the Tax Foundation’s State and Local Sales Tax Rates, Midyear 2026. No state changed its base rate between January and July 2026.
| State | State rate | Avg. local* |
|---|
*Population-weighted average local rate, not the rate for any specific address. Source: Tax Foundation, Midyear 2026 (data from Sales Tax Clearinghouse and state revenue departments).
Five states — nicknamed NOMAD — levy no statewide sales tax: New Hampshire, Oregon, Montana, Alaska and Delaware. In this calculator their state rate is prefilled as 0.00%.
Source: Tax Foundation, Midyear 2026.
Most states let counties, cities and special districts add their own taxes on top of the state rate. For example, the state rate is 7.25% in California and 4.00% in Alabama, but combined rates can exceed 10% in some California and Alabama jurisdictions. The Tax Foundation reports average local layers of 5.46% in Alabama and around 1.78% in California, but these are population-weighted averages — the exact rate depends on the delivery address or ZIP code. The nationwide population-weighted average combined rate is 7.53%.
To get an exact figure, look up the address on the state department of revenue’s rate lookup (e.g., California CDTFA, Texas Comptroller) and type that local portion into the local-rate box. We deliberately do not fabricate ZIP-code-level rates.
After the Supreme Court’s 2018 South Dakota v. Wayfair decision, a state can require out-of-state sellers to register and collect sales tax once their sales into that state cross an “economic nexus” threshold — with no physical presence required.
Thresholds are typically measured over the current or previous calendar year (or a rolling 12 months), and exactly which sales count — exempt sales, marketplace sales — differs by state. Marketplace facilitators (Amazon, eBay, Etsy, Shopify Marketplaces, etc.) usually collect tax on sales they facilitate, but those sales may still count toward your own threshold. Confirm each state’s current rule with its department of revenue.
Sources: Tax Foundation; state-by-state nexus guides verified in 2026 such as SalesTaxComplianceUSA and NexusByState.
Use the reverse calculator above. Given a tax-included total T and rate r: pre-tax price = T ÷ (1 + r), and tax = T − pre-tax price. Example: $107.25 at 7.25% gives $100.00 pre-tax and $7.25 tax. Note this is not the same as multiplying the total by the rate — that would overstate the tax.
Rates are only half the story — states also differ on what is taxable. Most states fully or partially exempt groceries (Illinois removed its 1% state tax on groceries from January 1, 2026, though many local taxes still apply); some exempt or discount clothing (e.g., New York’s clothing exemption); and states continue to expand taxation of digital goods and services in 2026. Hawaii’s 4.00% is a General Excise Tax on gross receipts with a very broad base, so it is not directly comparable to a retail sales tax. Always check product taxability for the state you sell into.
Source: Tax Foundation, Midyear 2026.
See the exact 2026 state and average combined rate for all 50 states + DC, each with its own calculator and nexus threshold.
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