Is sales tax the same across an entire state?

No. The state rate is only the base — counties, cities and special districts add their own on top, so two stores ten miles apart can total different rates even in the same state. Always use the combined rate for the address the purchase is actually made from or delivered to, not the headline state figure.

Do I need to charge sales tax on online orders?

Often yes. Since a 2018 US Supreme Court decision, states can require sellers to collect tax once they have enough activity — nexus — in that state, even without a physical shop. Thresholds differ by state and are usually based on revenue or order count, so an online seller checks the rules for each state they ship into.

Why is tax charged on some items but not others?

Exemptions vary by state and by category: groceries, medicine, clothing and manufacturing equipment are treated differently depending on where you buy. A receipt that shows tax on the shirt but not the food is following that state's exemption list, not making a mistake.

Which rate should I enter in the calculator?

The combined rate that applies to your transaction — state plus county and city. Your receipt shows it as a single line, your state's department of revenue publishes it by locality, and a store's posted rate is usually correct for that address.

How to Calculate US Sales Tax in Any State

Sales tax is one of the most confusing costs for US shoppers. Every state sets its own rate, and many states allow cities and counties to add their own tax on top. A $100 purchase can cost anywhere from $100 to $110 depending on where you shop.

US State Sales Tax Rates

State rates change periodically. As of mid-2026, the five states with the highest state-level rates are California (7.25%), Tennessee (7.00%), Rhode Island (7.00%), Mississippi (7.00%), and Indiana (7.00%). The five states with the lowest non-zero rates are Colorado (2.90%), Wyoming (4.00%), Alabama (4.00%), Georgia (4.00%), and Hawaii (4.00%). Rates source: Tax Foundation, mid-2026. Combined state and local averages differ from state rates — check your local rate for accuracy.

States with No Sales Tax

Five US states have no statewide sales tax — Alaska, Delaware, Montana, New Hampshire, and Oregon. However, Alaska allows local jurisdictions to charge sales tax, so some areas in Alaska do collect tax.

How to Calculate

Multiply the purchase price by the tax rate. Example: $200 jacket in California (7.25% state rate). Tax = $200 × 0.0725 = $14.50. Total = $214.50. For a $50 meal in Texas (6.25% state rate): Tax = $50 × 0.0625 = $3.13. Total = $53.13.

What I Tested

I used the US Sales Tax Calculator with several states.

• $100 in California (7.25%) → Tax: $7.25, Total: $107.25. Correct.

• $250 in Texas (6.25%) → Tax: $15.63, Total: $265.63. Correct.

• $1,000 in New York (4%) → Tax: $40.00, Total: $1,040.00. Correct.

• $50 in Oregon (0%) → Tax: $0.00, Total: $50.00. Correct — no sales tax state.

• Custom rate 8.75% (hypothetical state + local) on $300 → Tax: $26.25, Total: $326.25. Correct.

Step-by-Step

(1) Open the US Sales Tax Calculator. (2) Enter the purchase price. (3) Select your state from the dropdown. (4) Optionally enter a custom rate to include local county/city tax. (5) Click 'Calculate Tax' to see the tax amount and total.

One Limitation

This calculator uses state-level tax rates only. Many states have additional local (city/county) taxes that are not included in the state rate. Use the custom rate field to enter the combined rate for your specific location.

Common Mistake

Forgetting that some items are tax-exempt. Groceries, prescription medicine, and clothing are exempt or taxed at lower rates in several states. Always check your state's specific rules for the item category.

How It Compares

Most tax apps (TaxJar, Avalara) are designed for businesses and require accounts. Calculator.net has a sales tax calculator but does not include state-specific rates. Our tool includes all 50 state rates plus D.C., supports custom local rates, and works in your browser with no account or upload.

Privacy

Tax rates and totals are calculated on your device. Your purchase amounts are never uploaded — close the tab and the numbers are gone.

Next Step

If you are budgeting for a purchase, try the Budget Calculator to plan your monthly expenses.

Why Two Totals in the Same State Differ

Sales tax in the United States is layered. The state sets a base rate, then counties, cities and special districts — for transport, hospitals, tourism — add fractions of a percent each. In many states the local layers are the larger part of the total, which is why a statewide rate table gives you a number that is consistently lower than the one at the register.

Sourcing rules decide which address applies. Most states use destination sourcing for shipped orders — the tax follows where the buyer takes delivery — while over-the-counter sales follow the store's address. For anything delivered across a border inside the same state, the difference between origin and destination can move the total by a full percentage point or more.

Exemptions, Services and Special Cases

Not everything is taxed. A majority of states exempt most grocery items, several exempt clothing entirely, and the treatment of services — repairs, consulting, legal work — ranges from untaxed to fully taxable depending on the state. Digital goods sit in the same patchwork: some states tax downloads and streaming, others do not.

The practical consequence is that a single percentage rarely describes a real invoice. For a personal purchase, use the rate shown on the receipt. For a business, the category rules matter more than the rate, and they are worth checking against the state's own publication before you quote a price, because a tax-inclusive quote that turns out to be tax-exclusive is an unpleasant conversation.