Sales Tax Calculator

There is no single "sales tax rate" for a state

Ask what a state's income tax rate is, and there is a real, single answer written into that state's own tax schedule. Ask what its sales tax rate is, and the honest answer is "it depends where in the state you're standing." A state legislature sets one statutory base rate, but most states then let counties, cities, transit authorities and special districts add their own rate on top — and those add-ons genuinely differ from one side of a county line to the other. Two addresses ten minutes apart, in the same state, can charge noticeably different combined rates.

That is why this calculator shows two different numbers instead of one. The state rate is the base rate set by state law, verified against that state's own department of revenue or taxation. The average combined rate is a separate estimate — from the Tax Foundation's Tax Foundation, "State and Local Sales Tax Rates, Midyear 2026" (Abir Mandal, published July 6, 2026). Local rates are population-weighted averages as of January 1, 2026. — of what a typical shopper in that state actually pays once local add-ons are folded in, population-weighted so heavily-populated areas count more than sparsely-populated ones. It is a good estimate, not a fact about your specific address, and the calculator labels it that way rather than presenting it with the confidence of a published statute.

Where the tax is actually charged

For most everyday retail purchases, sales tax is sourced to the buyer's location — the store you're standing in, or the address a package is shipped to. That is why the rate depends on where you are rather than where a company is headquartered. Online and remote-seller transactions add a layer of real complexity on top of that general rule — since a 2018 Supreme Court decision, states can require out-of-state sellers to collect tax once they do enough business in that state, and exactly how a specific online order is taxed can depend on rules this calculator does not attempt to model. For an ordinary in-person purchase, the address-based rule above is what applies.

The five states with no sales tax, and Alaska's exception

Alaska, Delaware, Montana, New Hampshire and Oregon charge no statewide sales tax. For four of them that is close to the whole story: no state tax, and no local sales tax either, so the rate really is zero everywhere. Alaska is different. It has no state-level sales tax, but it is the one state among the five that allows its own cities and boroughs to levy a local sales tax, and many do — some above 7%. So "Alaska has no sales tax" is true only at the state level; what you actually pay at a register in Juneau or Anchorage depends entirely on the local rate there.

Reading a receipt backwards

The reverse calculation on this page starts from a tax-inclusive total and works out what the price was before tax. The arithmetic is the total divided by (1 plus the rate as a decimal) — dividing by 1.08 for an 8% rate, say — not the total multiplied by the rate. That second, wrong shortcut is a common mistake: multiplying a $54 total by 8% gives $4.32, not the correct $4.00 in tax that an 8% rate on a $50 pre-tax price actually produces. This calculator gets the division right and lets you check it by feeding a forward result back through the reverse calculation, which recovers the original price exactly.

People reach for this the same handful of ways: checking a receipt line-item against a rate they expect, figuring out what a "tax included" advertised price actually charges before tax, or backing into what a business's pre-tax revenue was from its total register receipts for a shift, a day or a reporting period.

What a flat rate can't capture

Real sales tax is rarely one flat percentage on every item in a cart. Most states that tax groceries do so at a reduced rate or exempt them outright; several exempt prescription and over-the-counter medicine; a number exempt clothing entirely or exempt it below a price threshold and tax it fully above that line. Which categories qualify, and at what rate, is decided state by state and sometimes city by city, with enough variation that a general calculator cannot responsibly guess at it. This tool applies one rate to the whole amount you enter, which is the right approach for a single non-exempt item or a rough estimate, and the wrong approach for a mixed grocery basket in a state that exempts food.

What this calculator does not include

• Item-level exemptions and reduced rates — groceries, prescription and over-the-counter medicine, and clothing thresholds all vary hugely by state and are not modelled here.
• Any other product-specific tax, such as taxes on restaurant meals, lodging, vehicles or digital goods that some states rate differently from general retail.
• The exact local rate for any specific address. The average combined rate is a state-level statistical estimate; the true rate where you are could differ from both figures shown, sometimes by more than a point.