Sales Tax Calculator

This is one of the free tax calculators on this site — the forward version of the reverse sales tax calculator. Instead of working backward from a receipt total, this one starts with the price before tax and tells you what you'll actually pay.

I use the reverse calculator more often, personally, because I'm usually staring at a receipt trying to figure out what things cost before tax got tacked on. But the forward calculator has its own sweet spot. Budgeting, mostly. When you know an item costs $349 and you want to figure out what the register is actually going to charge you — that's when you need this one. It's also handy when you're comparing prices across states, or when you want to quote a client a price that includes tax and you need to know what number to put on the invoice.

The tool works the same way as the reverse calculator. Pick your state from the dropdown (it pulls in the combined state plus average local rate) or type in a custom rate if you know your exact local number. Hit calculate or just start typing — it updates in real time.

How Sales Tax Is Added

The formula is straightforward:

Total = Price x (1 + Rate / 100)

Or if you prefer to see it broken into two steps: first figure out the tax amount (Price x Rate / 100), then add it to the original price. Same result either way.

Real example. A $67.49 pair of shoes in Chicago, where the combined rate is 10.25%. Tax comes out to $67.49 x 0.1025 = $6.92 (rounded to the nearest cent). Total: $74.41. The reason the formula uses multiplication rather than just adding a flat amount is that the tax scales with the price — 10.25% of a $20 item is $2.05, but 10.25% of a $200 item is $20.50. Same rate, wildly different dollar amounts. That scaling is the whole point of a percentage-based tax, and it's also why you can't just memorize a flat number to add at checkout.

One thing that catches people off guard: the rate you see on a tag or a store sign is almost never the full rate. Most stores only show the state portion. But counties and cities pile on their own percentages. In Chicago, the state rate is 6.25%, Cook County adds 1.75%, the city adds 1.25%, and there's a transit authority tack-on of 1.00%. Those pieces add up to that 10.25% combined rate. If you only budgeted for the 6.25% state rate, you'd be short by almost $3 on a $67 purchase.

Sales Tax by State

Here are the 15 most populated states and their rates. The "Combined Rate" column includes the average local taxes on top of the base state rate — your actual rate may be slightly higher or lower depending on exactly where in the state you're buying.

See all 50 states →

A couple things jump out from this table. New York's state rate is only 4%, which sounds low — until the local taxes push the combined rate to 8.52%. That's a bigger gap between state and combined than almost any other state on the list. Michigan and New Jersey, on the other hand, have no local add-ons at all, so the state rate is exactly what you pay everywhere in those states. Washington state deserves a mention too: 9.23% combined, and in some parts of Seattle the rate cracks 10.25%. That's not far off from a whole extra dime on every dollar you spend.

What's Taxable and What's Not

This is genuinely one of the most confusing parts of US sales tax, and I think it's worth spelling out because the rules vary so much from state to state that it's almost impossible to generalize.

Groceries. Most states exempt groceries — meaning unprepared food you buy at a supermarket and cook at home. But not all of them. Mississippi and Alabama tax groceries at the full state rate. Kansas used to as well, though they've been phasing that out. Some states apply a reduced rate: Virginia charges 1% on groceries instead of the normal 5.3%. And almost everywhere, "prepared food" (deli sandwiches, rotisserie chicken, anything heated in the store) is taxed even when raw groceries aren't. The line between "grocery" and "prepared food" is genuinely blurry. Is a bag of pre-washed salad mix a grocery or prepared food? Depends on the state. I'm not making this up.

Clothing. A handful of states exempt clothing from sales tax entirely. New York exempts clothing and footwear under $110 per item. Pennsylvania and New Jersey exempt most clothing with no price cap. Parts of Connecticut exempt clothing under $50. Everywhere else, that new jacket gets taxed at the full rate.

Services. Here's where it gets really inconsistent. Most states don't tax services — your haircut, your plumber, your accountant. But Hawaii taxes nearly all services, and New Mexico, South Dakota, and West Virginia cast a pretty wide net too. A handful of states tax specific services like dry cleaning or auto repair while leaving others untaxed. If you're a service provider trying to figure out whether to charge tax, honestly, check with your state's department of revenue. The rules are too specific and too variable for a general calculator to cover.

Worked Example: Laptop in Austin

You're budgeting for a $1,249 laptop in Austin, Texas. The combined rate there is 8.25% (6.25% state plus 2% local). Tax: $1,249 x 0.0825 = $103.04. Total: $1,352.04. That's an extra hundred bucks you need to account for — not trivial when you're already spending over a grand. For comparison, if you bought the same laptop in Portland, Oregon (no sales tax), you'd pay exactly $1,249. That $103 difference is enough to buy a decent laptop bag to carry it in.