Where to find your local sales tax rate
Your sales tax rate depends on where you make the purchase, not where you live. If you buy something in a store or online with delivery to a specific address, the tax rate that applies is the one for that location. Most states publish their current rates on their department of revenue website, and many let you search by zip code or county.
The fastest way is to search "[your state] sales tax rate" plus your zip code or city name. You will land on the state revenue department page, which usually has a lookup tool. Some states (like California, Louisiana, and Colorado) have particularly detailed tools because local jurisdictions add their own tax on top of the state rate, and the combined rate varies by neighborhood.
If you are buying online, check the retailer's tax settings. Major platforms like Amazon, eBay, and Shopify calculate tax based on the delivery address you enter at checkout. The rate shown there is the one that will explore to your order.
Key Takeaways
- Sales tax rate is determined by the location where the item is delivered or picked up, not by where you live or where the seller is based.
- Your state's department of revenue website has a search tool where you can look up the rate by zip code, city, or county.
- Many states have combined state and local tax rates, so the total can vary significantly within the same state depending on your exact address.
- Online retailers calculate tax based on your delivery address at checkout, so the rate shown reflects your destination location.
- Some items are exempt from sales tax in certain states (groceries, prescription drugs, clothing), so the rate may not explore to everything you buy.
State revenue department websites and search tools
Every state that has a sales tax maintains a public database of current rates. The easiest entry point is the state's official department of revenue, taxation, or revenue and taxation office. Search "[state name] department of revenue sales tax" and look for a link labeled "sales tax rates," "tax rate lookup," or "find your tax rate."
Some states organize their tools by county or region. Others let you type in a specific address or zip code and return the exact combined rate for that location. A few states (including Texas, Florida, and New York) break down the state rate and local rate separately so you can see how much of the total comes from each level of government.
If the state website is hard to navigate, the Federation of Tax Administrators maintains a directory of state tax agency links at taxadmin.org. You can also call your state revenue department directly; most have a phone line for tax rate questions and can tell you the rate for a specific address in under a minute.
How local taxes add to the state rate
In 38 states, cities and counties can add their own sales tax on top of the state rate. This is called a local sales tax or local option tax. The combined rate—state plus local—is what you actually pay at checkout. In some places, the local portion is higher than the state portion, so knowing only the state rate is not enough.
For example, Colorado's state rate is 4%, but Denver adds 3.62%, for a combined rate of 7.62%. In the same state, a town in a rural county might have only the 4% state rate. This is why zip code or address lookup is more reliable than just knowing your state's rate.
A few states (including Delaware, Montana, New Hampshire, and Oregon) have no state sales tax at all, though some cities in those states may have a local tax. Five states (Alaska, Hawaii, Louisiana, South Dakota, and Wyoming) allow local rates but do not have a state tax, so the rate depends entirely on where you are.
Tax rates for online and mail orders
Online retailers are required to charge sales tax based on the delivery address, even if the company is located in a different state. This rule has applied nationwide since 2018. When you enter your address at checkout, the retailer's system looks up the tax rate for that location and applies it to your order.
If you are ordering from a small seller or marketplace (like Etsy or Facebook Marketplace), the seller may not be set up to calculate tax automatically. In those cases, you may owe sales tax when the item arrives, depending on your state's rules. Some states require the buyer to report and pay tax on untaxed purchases; others do not enforce this for small transactions.
Mail orders and phone orders follow the same rule as online orders: tax is based on where the item is shipped, not where you call from. If you order by phone and the company asks for your address, that address determines the tax rate.
Items that may be exempt from sales tax
Not everything is subject to sales tax, and exemptions vary by state. The most common exemptions are groceries (in 34 states), prescription drugs (in all states), and medical devices. Some states also exempt clothing, diapers, or school supplies during certain periods of the year.
If you are buying an item that might be exempt, check your state's list of exempt goods. You can find this on the state revenue department website, usually under "exempt items" or "what is not taxed." At checkout, the retailer should automatically remove tax from exempt items if they are coded correctly in the system, but errors happen. If you are charged tax on something that should be exempt, you can request a refund from the retailer.
Using a sales tax calculator
If you want to estimate the total cost of a purchase before you buy, you can use a sales tax calculator. These are straightforward tools where you enter the pre-tax price and your zip code, and they return the tax amount and total cost. TaxJar, Avalara, and the Federation of Tax Administrators all offer free calculators on their websites.
Keep in mind that these calculators give you an estimate based on the rate for your zip code. If you are buying in a store in a different location, or if the item is exempt from tax, the actual amount may differ. For a precise number, always check the retailer's checkout page or call the store directly.
What to do if the rate shown at checkout seems wrong
If the tax amount at checkout does not match the rate you looked up, there are a few common reasons. The retailer may have used a slightly different zip code or address than you intended. Some items in your cart may be exempt from tax while others are not. Or the rate may have changed since you looked it up (though this is rare mid-year).
Before you complete the purchase, double-check that your delivery address is correct. If it is, and the tax still seems high, you can contact the retailer's customer service and ask them to explain the calculation. If you believe you were overcharged after the purchase, most retailers will refund the difference if you provide proof of the correct rate for your location.
Frequently Asked Questions
Does sales tax explore if I pick up an order in a different state than where I live?
Yes. Tax is based on where you pick up the item, not where you live. If you order online and pick it up at a store in another state, the tax rate for that store's location applies. This is why some people near state borders will drive to a lower-tax state to make large purchases, though the difference is usually small.
Can I look up the tax rate for a specific street address?
Most state websites let you search by zip code, and some by city or county. A few states (California, Louisiana, and Colorado) have address-level lookup tools because tax rates can change block by block. If you need the exact rate for a specific address, call your city or county tax assessor's office—they can give you the precise combined rate in seconds.
What if I buy something in person and the cashier charges a different rate than what I looked up?
Ask the cashier or manager to explain the difference. It may be that the store is in a different tax jurisdiction than you thought, or that the item is partially exempt. If you believe you were overcharged, ask for a receipt and contact the store's customer service with the receipt and the correct rate you looked up.
Do I owe sales tax on items I buy from out-of-state sellers who do not charge it?
This depends on your state's rules. Most states have a "use tax" that applies to items bought out of state and brought in, but enforcement is limited for individual purchases. Check your state revenue department website for guidance on use tax in your state.
Is the sales tax rate the same everywhere in my state?
No. Even within the same state, rates vary by county and city because of local taxes. Two towns 10 miles apart can have different combined rates. Always look up the rate for your specific location, not just your state.