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Finance · Free browser tool

US Sales Tax Calculator

Calculate US state sales tax, tax-inclusive total, or reverse-calculate pre-tax price instantly by state.

Sales tax inputs

Results update instantly as you type.

Calculation mode

State rates shown are approximate 2026 base state sales tax only—most states also allow county and city add-ons, so the combined rate at checkout is often higher. Verify the exact combined rate for your specific location or nexus state before filing.

Pre-tax price

$100.00

Sales tax amount

$7.25

Total price

$107.25

Effective tax rate

7.2%

Tax breakdown

State
California
Sales tax rate applied
7.3%
Pre-tax price
$100.00
Sales tax amount
+$7.25
Total price
$107.25

Frequently Asked Questions

Why do US sales tax rates vary so much by state?

Unlike VAT or GST countries, the US has no federal sales tax—each state sets its own base rate, and most also allow counties and cities to add local sales tax on top. This tool presets each state's base rate as a starting point, but you can edit the rate field to add your specific local surcharge for a more accurate combined rate.

What is "economic nexus" and why does it matter for online sellers?

Following the 2018 South Dakota v. Wayfair Supreme Court ruling, states can require out-of-state sellers to collect sales tax once they cross a sales or transaction threshold in that state—commonly around $100,000 in sales or 200 transactions per year, though exact thresholds vary by state. Once you have nexus in a state, you're generally required to register, collect, and remit sales tax there even without a physical presence.

Which US states have no state sales tax?

Five states—often remembered by the acronym NOMAD—charge no statewide sales tax: New Hampshire, Oregon, Montana, Alaska, and Delaware. Alaska does allow some local municipalities to levy their own local sales tax despite having no state-level tax, so always confirm local rules even in a "no sales tax" state.

Is my price or sales data uploaded to a server?

No. All tax math runs locally in your browser using plain arithmetic—your amounts, selected state, and custom rates are never sent to a server.

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US Sales Tax by State in 2026: Rates, Nexus, and the Five No-Tax States

The United States has no federal sales tax—every state sets its own base rate, and in most states, counties and cities can layer additional local sales tax on top. That is why the same $100 purchase can be taxed at 0% in one state and well over 9% combined in another once local add-ons are included. This calculator presets each state's base rate as a starting point; edit the rate field directly if you know your exact combined state-plus-local rate.

Five states charge no statewide sales tax at all, often remembered by the acronym NOMAD: New Hampshire, Oregon, Montana, Alaska, and Delaware. Alaska is a partial exception— while it has no state-level sales tax, some Alaska municipalities levy their own local sales tax, so "no sales tax state" does not always mean zero tax at checkout everywhere within that state.

For online sellers shipping across state lines, the relevant question is often not where your business is located but whether you have "economic nexus" in your customer's state. Since the 2018 South Dakota v. Wayfair Supreme Court decision, states can require remote sellers to collect and remit sales tax once they cross a sales or transaction threshold in that state—commonly around $100,000 in annual sales or 200 transactions, though the exact figures vary by state. Crossing that threshold generally means registering for a sales tax permit and collecting tax on future sales into that state, even without a warehouse or office there.

Use the Reverse Tax mode when you only know a tax-inclusive total—for example, a receipt total or a marketplace payout—and need to back out the pre-tax price and exact tax amount. If you sell on Etsy, eBay, Amazon, or Shopify, pair this with the Etsy Fee Calculator , Amazon FBA Calculator , or 1099 Freelance Tax Estimator to see the full picture from sales tax collected at checkout through to your own income tax liability. This free calculator runs entirely in your browser—your prices and state selection are never uploaded to a server.