Where the rates come from
We use publicly available tax rates from state and local tax agencies, including departments of revenue.
What we use
Tax agencies publish rate tables, address lists and maps showing where local taxes apply. We bring those sources together so you can look up an address in one place.
- Published rates. State tax tables, local tax notices and city ordinances tell us the rates.
- Address lists and maps. State and local tax maps, along with US Census maps, help us find which taxes apply at your address.
- California’s own lookup. For California, we ask the state’s tax agency for the rate when you search.
How your address gets a rate
Where a state publishes street address lists, we match your address to those lists. Elsewhere, we locate your address on a map to find its county, city and any special tax districts. A district is an area with an extra local tax, such as one that funds public transit.
We then use that state’s rules to work out the total. In states with one rate everywhere, we use the statewide rate.
How current is the data?
Most searches use data we have already collected. New publications need to be loaded, and some rate changes need to be entered by hand. Updates are not instant. California’s lookup returns the state’s rate for today.
Rates and boundaries can change at different times. An older rate may still be matched using today’s city or district boundaries.
What a result covers
The result is the general sales tax rate for the address. What you actually owe can depend on what you sell, exemptions and where the sale takes place.
We have lookup methods for all 50 states and DC, but some addresses and local tax districts cannot be resolved. If the available information conflicts or is too uncertain, we may be unable to give you a rate.
Want to check a particular state? See the detailed state coverage reference on GitHub for source links and limits by state.
Sources by state
All 50 states and DC are listed below. Streamlined Sales Tax is a shared publishing program: participating states provide their own rate and address files through it. View those files. US Census maps help us locate county and city boundaries; tax rates come from the other sources listed.
| State | Sources we use |
|---|---|
| Alabama | Department of Revenue rate files and US Census maps. View published source |
| Alaska | Alaska Remote Seller Sales Tax Commission rates and maps. Covers participating communities. View published source |
| Arizona | Department of Revenue monthly rate files and official tax maps. View published source |
| Arkansas | State-published rate and address files from Streamlined Sales Tax. View published files |
| California | California Department of Tax and Fee Administration’s address lookup. Returns today’s rate. View published source |
| Colorado | Colorado’s sales tax lookup service, including rates and tax-area maps. View published source |
| Connecticut | A statewide rate table maintained by OpenTaxRate. View maintained table on GitHub |
| Delaware | A statewide table maintained by OpenTaxRate: no general sales tax. View maintained table on GitHub |
| District of Columbia | A district-wide rate table maintained by OpenTaxRate. View maintained table on GitHub |
| Florida | Department of Revenue county tax table (DR-15DSS), entered by hand, and US Census maps. View published source |
| Georgia | State-published rate and address files from Streamlined Sales Tax. View published files |
| Hawaii | General excise tax and county surcharge tables, entered by hand, and US Census maps. View published source |
| Idaho | State rate and city tax ordinances, entered by hand, and US Census maps. View maintained table on GitHub |
| Illinois | Department of Revenue rate files, address lists and official tax maps. View published source |
| Indiana | State-published rate and address files from Streamlined Sales Tax. View published files |
| Iowa | State-published rate and address files from Streamlined Sales Tax. View published files |
| Kansas | State-published rate and address files from Streamlined Sales Tax. View published files |
| Kentucky | State-published rate and address files from Streamlined Sales Tax. View published files |
| Louisiana | Louisiana Sales and Use Tax Commission for Remote Sellers’ lookup, plus US Census and local maps. View published source |
| Maine | A statewide rate table maintained by OpenTaxRate. View maintained table on GitHub |
| Maryland | A statewide rate table maintained by OpenTaxRate. View maintained table on GitHub |
| Massachusetts | A statewide rate table maintained by OpenTaxRate. View maintained table on GitHub |
| Michigan | State-published rate and address files from Streamlined Sales Tax. View published files |
| Minnesota | State-published rate and address files from Streamlined Sales Tax. View published files |
| Mississippi | Department of Revenue rates, entered by hand, and US Census maps. View maintained table on GitHub |
| Missouri | Department of Revenue address lists and quarterly rate spreadsheets. View published source |
| Montana | A statewide table with no general sales tax, plus a list of resort areas with local taxes. Maintained by OpenTaxRate. View maintained table on GitHub |
| Nebraska | State-published rate and address files from Streamlined Sales Tax. View published files |
| Nevada | State-published rate and address files from Streamlined Sales Tax. View published files |
| New Hampshire | A statewide table maintained by OpenTaxRate: no general sales tax. View maintained table on GitHub |
| New Jersey | State-published rate and address files from Streamlined Sales Tax. View published files |
| New Mexico | Taxation and Revenue Department maps showing tax areas and their combined rates. View published source |
| New York | State tax rate publication (Publication 718), entered by hand, and US Census maps. View published source |
| North Carolina | State-published rate and address files from Streamlined Sales Tax. View published files |
| North Dakota | State-published rate and address files from Streamlined Sales Tax. View published files |
| Ohio | State-published rate and address files from Streamlined Sales Tax. View published files |
| Oklahoma | State-published rate and address files from Streamlined Sales Tax. View published files |
| Oregon | A statewide table maintained by OpenTaxRate: no general sales tax. View maintained table on GitHub |
| Pennsylvania | Department of Revenue rates, entered by hand, and US Census maps. View maintained table on GitHub |
| Rhode Island | State-published rate and address files from Streamlined Sales Tax. View published files |
| South Carolina | State tax rate publication (ST-500), entered by hand, plus US Census and state maps. View published source |
| South Dakota | State-published rate and address files from Streamlined Sales Tax. View published files |
| Tennessee | State-published rate and address files from Streamlined Sales Tax. View published files |
| Texas | Texas Comptroller rate files, spreadsheets, published tax information and official tax maps. View published source |
| Utah | State-published rate and address files from Streamlined Sales Tax. View published files |
| Vermont | State-published rate and address files from Streamlined Sales Tax. View published files |
| Virginia | Virginia Tax’s spreadsheet of rates by location and date, plus US Census maps. View published source |
| Washington | State-published rate and address files from Streamlined Sales Tax. View published files |
| West Virginia | State-published rate and address files from Streamlined Sales Tax. View published files |
| Wisconsin | State-published rate and address files from Streamlined Sales Tax. View published files |
| Wyoming | State-published rate and address files from Streamlined Sales Tax. View published files |