Your sales tax rate depends on where you buy, not where you live

Sales tax is a percentage added to the price of goods at checkout. The rate you pay is set by the state, county, and sometimes the city where the store is located. If you buy something in one state and live in another, you pay the tax rate of the state where you made the purchase. This means the same item costs different amounts depending on which store you walk into.

The rate varies widely. Some states have no sales tax at all. Others charge between 4 and 10 percent. Within a single state, cities and counties can add their own local tax on top of the state rate, so two towns 20 miles apart may have different totals.

Key Takeaways

  • Sales tax rate depends on the location of the store, not your home address or where you're from.
  • You can find your exact rate by searching "[your city] sales tax rate" or checking your state's Department of Revenue website.
  • To calculate the tax on a purchase, multiply the price by the tax rate as a decimal (for example, 7% becomes 0.07).
  • Some items are exempt from sales tax in most states, including groceries, prescription medications, and medical equipment.
  • Online purchases are increasingly subject to sales tax, even when shipped from out of state.

How to find the sales tax rate for your area

Start by searching "[your city name] sales tax rate" in any search engine. Most results will show you the combined state and local rate for that specific location. This is the fastest method for a quick answer.

If you need the official source, go to your state's Department of Revenue website. Every state has one, and they all publish current tax rates by county and city. Search "[your state] Department of Revenue" and look for a section labeled "Sales Tax Rates" or "Tax Rate Tables." Some states organize this by county; others let you search by zip code or city name.

For a specific address—such as a store location—you can also call the city or county tax assessor's office. They can tell you the exact rate that applies to that address. This matters if you're near a city border, because the rate can change block by block.

How to calculate sales tax on a purchase

The math is straightforward. Convert the percentage to a decimal by dividing by 100, then multiply the price by that decimal. For example, if an item costs $50 and the sales tax is 8 percent, you multiply $50 by 0.08 to get $4. The total you pay is $50 plus $4, or $54.

Here is the formula: Price × (Tax Rate ÷ 100) = Tax Amount. Then add the tax amount to the original price to get your total.

If you know the final total and want to work backward to find the tax amount, subtract the original price from the total. For instance, if you paid $54 total and the item was $50, the tax was $4.

Items that are usually exempt from sales tax

Most states do not charge sales tax on groceries—items you buy to cook at home, like bread, milk, vegetables, and meat. However, prepared foods (deli items, hot pizza, restaurant meals) are taxed. Some states tax all food; others tax none. Check your state's rules if you are unsure.

Prescription medications are exempt in all 50 states. Medical equipment prescribed by a doctor—such as wheelchairs, hearing aids, and diabetic supplies—is also typically exempt, though the rules vary by state and item.

Clothing is taxed in most states, but a few states exempt it entirely or exempt items below a certain price. Children's clothing is sometimes treated differently from adult clothing. Again, your state's Department of Revenue website will clarify the rules for your location.

Sales tax on online and out-of-state purchases

For many years, online retailers did not charge sales tax unless they had a physical location in your state. That has changed. As of 2024, most large online retailers are required to charge sales tax based on the address where the item is being shipped, regardless of where the company is based. This applies to purchases from Amazon, Walmart, Target, and most other major sellers.

Smaller online retailers may not yet be required to charge sales tax, depending on their sales volume and your state's rules. If you notice no tax was added to an online order, it does not mean you owe nothing—some states require you to report and pay "use tax" on untaxed purchases when you file your income tax return. This is rare for individual shoppers but worth knowing.

How sales tax rates are set and why they change

State legislatures set the base sales tax rate for their state. Counties and cities then vote to add local taxes on top of that. A state might have a 5 percent rate, but a city within it might add 2 percent, bringing the total to 7 percent. When a city or county needs more revenue, they may vote to raise their local rate, which changes the total you pay.

These changes happen throughout the year, so a rate you looked up six months ago may no longer be current. If you are budgeting for a large purchase or running a business, check the current rate shortly before you buy.

Using online calculators and receipts to verify

Many state and local tax websites include a sales tax calculator. You enter the price and your location, and it shows you the tax amount and total. These are free and accurate as long as you enter the correct location.

Your receipt is also a reliable source. The tax amount is printed on every receipt, along with the subtotal and total. If you want to verify the rate, divide the tax amount by the subtotal. For example, if the subtotal was $100 and the tax was $8, the rate is 8 percent.

Frequently Asked Questions

Do I pay sales tax if I buy something online and have it shipped to another state?

You pay the sales tax rate of the state where the item is being shipped, not where the seller is located. Most major online retailers now charge this tax automatically at checkout based on your shipping address.

What is the difference between sales tax and use tax?

Sales tax is charged by the seller at the point of purchase. Use tax is a tax you owe on items you bought without paying sales tax—usually out-of-state or from small online sellers. Most individual shoppers do not report use tax, but it technically applies in most states.

Can sales tax rates change during the year?

Yes. Cities and counties can vote to raise or lower their local tax rate at any time, though most changes take effect on January 1 or July 1. Check your state's Department of Revenue website if you need the current rate for a specific location.

Why is the tax on my receipt different from what I calculated?

Rounding can cause small differences. Retailers round the final total to the nearest cent, which may differ slightly from your calculation. Also, some items may be exempt while others are taxed, so the rate is not applied to the entire subtotal.

Do all states have sales tax?

No. Five states have no sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. Some states have a state sales tax but exempt groceries or other categories. Check your state's Department of Revenue for the rules where you live.