Sales tax is a percentage added to the price of goods and services at checkout
When you buy something in a store or online, the cashier or website adds a tax to your total. That tax is sales tax—a percentage of the purchase price that goes to your state or local government. The amount varies by location: some states have no sales tax at all, while others charge as much as 10 percent or more when you combine state and local rates.
You do not choose whether to pay it. The business collects the tax from you and sends it to the government on a regular schedule—usually monthly or quarterly. The tax applies to most physical items you buy, though groceries, prescription medicines, and some services are often exempt depending on where you live.
Key Takeaways
- Sales tax is added at the register and varies by state and county, ranging from zero percent in some states to over 10 percent in others.
- The business that sells you the item collects the tax and sends it to the government, not the other way around.
- Most states exempt groceries and prescription drugs, but rules differ widely by location.
- Online purchases are now taxed in most states, even when shipped from out of state.
- The tax rate you pay depends on where the item is delivered or picked up, not where you live or where the seller is based.
How the tax rate is set and who collects it
Each state sets its own base sales tax rate. That rate applies statewide, but cities and counties can add their own local tax on top of it. A state might have a 5 percent tax, but your county adds 2 percent, so you pay 7 percent total. The business owner is responsible for knowing the correct rate for each location where they sell and charging customers accordingly.
When you make a purchase, the business calculates the tax, adds it to your bill, and collects it from you at that moment. The business then files a return with the state—usually monthly or quarterly—reporting how much tax it collected and sending that money to the government. If a business fails to collect or send the tax, the government can fine them or take legal action.
What is taxed and what is not
Sales tax applies to most tangible goods—clothing, electronics, furniture, toys, and similar items. It also applies to many services, though the rules vary by state. A haircut might be taxed in one state but not another. Restaurant meals are usually taxed, though some states exempt prepared food under certain conditions.
Common exemptions across most states include groceries (unprepared food you cook at home), prescription medications, and medical devices. Some states also exempt clothing or shoes, though the thresholds differ. A few states do not tax services at all, while others tax nearly everything. Because the rules are state-specific, the same item can be taxed in one place and untaxed in another.
How online purchases are taxed
For many years, online retailers did not collect sales tax unless they had a physical location in your state. That changed in 2018 when the Supreme Court ruled that states could require online sellers to collect tax even without a store or warehouse in that state. Today, most large online retailers collect and send sales tax based on where your order is being shipped.
When you buy something online, the website calculates the tax rate for your delivery address and adds it to your total before checkout. The retailer then sends that tax to the appropriate state and local governments. Small sellers and marketplaces have different rules depending on the state, but the general principle is the same: tax is based on the destination address, not the seller's location.
The difference between sales tax and other taxes
Sales tax is separate from income tax, which is a percentage of the money you earn. It is also different from property tax, which applies to real estate. Sales tax is a consumption tax—it only applies when you buy something. You do not pay sales tax on money sitting in your bank account or on a salary you receive; you pay it only at the moment of purchase.
Some items are subject to special taxes on top of the regular sales tax. Gasoline, cigarettes, and alcohol often have excise taxes—extra taxes designed to discourage use or fund specific programs. These are added separately from sales tax and appear as distinct line items on your receipt or pump display.
Why sales tax rates vary so much by location
States set their own tax rates based on their budget needs and policy choices. Some states, like Oregon and Montana, have chosen not to collect sales tax at all, instead relying on income tax or other revenue sources. Others, like Tennessee and Texas, have no income tax but higher sales taxes to make up the difference.
Local governments add their own rates on top of the state rate to fund schools, roads, and services in their area. A county with expensive infrastructure or lower property values might charge a higher local sales tax. This is why two towns in the same state can have different total tax rates, and why the tax you pay depends on exactly where you are buying, not just which state you are in.
How to find the sales tax rate where you are
Your state's department of revenue or taxation website lists the current state rate and explains which items are exempt. Many sites also have a tool where you enter your address and see the combined state and local rate for your area. Local tax rates change occasionally, so checking the official source is more reliable than remembering the rate from last year.
When you shop online, the retailer's website should show the tax amount before you complete your purchase. If you are buying in person, the receipt shows the tax separately so you can see exactly how much was added. If the tax seems wrong, you can look up the rate for your location and compare it to what you were charged.
Frequently Asked Questions
Do I have to pay sales tax on everything I buy?
No. Most states exempt groceries, prescription medicines, and some medical equipment. Many states also exempt clothing or have special rules for certain services. The exemptions depend on your state and sometimes your county, so what is taxed in one place may not be in another.
Why is the price on the shelf different from what I pay at the register?
The shelf price does not include sales tax in most states. The tax is calculated and added at checkout. Some states require stores to post the final price including tax, but most do not, so the amount you pay is higher than the labeled price.
Can I get sales tax back if I return something?
Yes. When you return an item, the store refunds both the purchase price and the tax you paid. You should see the tax refunded on your receipt or credit card statement. If the refund does not include the tax, ask the store to correct it.
Do I pay sales tax on used items?
Usually yes, though some states exempt used goods sold by individuals or at certain types of sales. Used items sold by businesses are generally taxed the same way as new items. Check your state's rules if you are buying used goods and want to know whether tax applies.
What happens if a business does not collect sales tax?
The state can audit the business, demand payment of back taxes plus penalties and interest, and take legal action. In some cases, the state may hold the business owner personally responsible. Customers are not liable for a business's failure to collect tax.