Where to find your local sales tax rate
Your sales tax rate depends on where you live and, in some states, where you make the purchase. The rate is set by your state, county, and sometimes city — so the same item costs different amounts in different places. You can find your exact rate by entering your address into a state tax website, calling your local tax assessor's office, or using a sales tax lookup tool run by your state revenue department.
The fastest method is usually your state's Department of Revenue website. Most states have a search box where you type your zip code or full address and get the combined rate back in seconds. If you cannot find it online, your county assessor's office has the information and can tell you over the phone.
Key Takeaways
- Sales tax rates are set by state, county, and sometimes city, so you need your specific address to find your exact rate.
- Your state's Department of Revenue website almost always has a zip code or address lookup tool that shows the combined rate instantly.
- If the state website does not work, your county assessor's office or tax collector can give you the rate by phone.
- The rate you find is the total of all layers — state, county, and local — so you do not need to add them yourself.
- Some states have no sales tax at all, while others charge rates ranging from under 4 percent to over 10 percent.
Using your state's official tax website
Every state that collects sales tax maintains a Department of Revenue or Department of Taxation website with a rate lookup tool. The tool usually asks for your zip code, full address, or both. Enter the information and the site shows you the combined state, county, and local rate that applies to your location.
The name and exact location of this tool varies by state. Some states call it "Sales Tax Rate Lookup," others call it "Tax Rate Finder" or "Rate Search." If you cannot find it on the main page, look for a section labeled "Businesses," "Tax Rates," or "For Consumers." You can also search "[your state] sales tax rate lookup" in any search engine and the official state tool usually appears first.
Write down or screenshot the rate you find, because you may need it for budgeting, business planning, or understanding a receipt. The rate shown is the total you will pay — you do not add state plus county plus local yourself.
Contacting your county assessor or tax collector
If the state website is down, unclear, or does not have your address in its system, call your county assessor's office or tax collector's office directly. These offices maintain the official records for your county and can tell you the exact rate over the phone in minutes.
To find the phone number, search "[your county name] assessor" or "[your county name] tax collector" online, or call your city or county government main line and ask to be transferred. Have your full address ready when you call, including street, city, and zip code. Some counties also post rates on their websites, so check there first.
Understanding what the rate includes
The rate you find is the combined rate — it already includes the state portion, the county portion, and any city or local portion. You do not need to add these layers together yourself. If a lookup tool shows 8.5 percent, that is the total you will pay on a taxable purchase in that location.
Some states have no local sales tax at all, only state tax. Others allow counties or cities to add their own tax on top of the state rate. The lookup tool or tax office will give you the final number that applies to your address, so you know exactly what to expect.
States with no sales tax
Five states do not collect sales tax at all: Alaska, Delaware, Montana, New Hampshire, and Oregon. If you live in one of these states, there is no sales tax rate to find — purchases are not taxed at the point of sale.
However, some of these states have other taxes. Alaska allows municipalities to charge local sales tax, so some cities in Alaska do have sales tax even though the state does not. New Hampshire taxes meals and lodging. Check your state's Department of Revenue website to understand what is and is not taxed in your location.
Sales tax rates vary by item and location
The rate you find applies to most goods and services, but not all items are taxed the same way. Groceries, prescription medications, and certain medical equipment are often exempt from sales tax or taxed at a lower rate in many states. Some states tax services differently than goods. The rate lookup tool gives you the standard rate for your location, but the actual tax on a specific purchase may be lower if that item has a special exemption.
If you are buying something and want to know whether it will be taxed, ask the seller or check your state's Department of Revenue website for a list of exempt items. The rate you found is the starting point, but the final tax depends on what you are buying.
Using third-party sales tax calculators
Several private websites and apps offer sales tax rate lookups as a convenience, including TaxJar, Avalara, and general tax information sites. These tools pull data from state sources and can be useful if you want to calculate the total cost of a purchase quickly. However, they are not official sources — your state's Department of Revenue website is always the authoritative reference.
If you use a third-party tool and get a different rate than your state website shows, trust the state website. Third-party tools are usually accurate but can lag behind if rates change, so verify important numbers with the official state source.
Frequently Asked Questions
Why is the sales tax rate different in the next town over?
Sales tax is set by state, county, and city governments separately. Two towns in the same county might have different rates if one city adds its own local tax on top of the county rate. This is why you need your specific address, not just your state or county.
Do I need to know the sales tax rate before I buy something?
You do not need it to make a purchase — the cashier or checkout system calculates it for you. But knowing the rate helps you budget, understand your receipt, or calculate the true cost of an item before you buy it online.
What if the state website shows a different rate than the store charged me?
Rates can change a few times per year, and the state website may not update instantly. Check the date the website was last updated. If the rate is significantly different, contact the store or your state tax office. It is also possible the item you bought has a special tax rate or exemption that the standard rate does not reflect.
Can sales tax rates change, and how often?
Yes, rates change when state, county, or local governments pass new tax laws. Changes usually happen a few times per year, often on January 1 or July 1. If you need the current rate, always check the state website or call your tax office rather than relying on a rate you found months ago.
Is the rate I find online the same rate that applies to online purchases?
Usually yes, but it depends on the seller and your state's rules. Most states now require online retailers to charge sales tax based on where the item is being shipped. Use your delivery address to find the correct rate. Some sellers may have different rules, so check their tax policy if you are unsure.