Sales tax rates by address
Look up the published sales and use tax rates for a street address or ZIP code: the state, county, city and special district rates that apply, their effective dates and the state file each rate comes from. Covered: the states Olympus publishes (Connecticut, District of Columbia, Georgia, Iowa, Illinois, Indiana, Kentucky, Massachusetts, Maryland, Maine, Michigan, Minnesota, North Dakota, Nebraska, New Jersey, Nevada, Ohio, Oklahoma, Pennsylvania, Rhode Island, South Dakota, Tennessee, Utah, Vermont, Wisconsin, West Virginia, Wyoming), from their Streamlined Sales Tax files or their revenue departments' own rates; each answer says how precise it is. Any other state is not covered and gets no rate.
Free and without sign-up: lookups use the API's keyless demo, limited to a few a minute and a small number a day per network. Create a free API key for regular use. A published rate is not the tax due on a sale: taxability, sourcing, nexus and exemptions all change what is owed.
- These are published sales and use tax rates by jurisdiction. They are not the tax due on a transaction and not a taxability determination: whether an item is taxable, which location's rate applies (sourcing), whether the seller must collect (nexus) and any exemption all change what is owed. Rates come from the Streamlined Sales Tax files the states publish or, where a result's source says so, from the state revenue department's own files and pages; confirm with the state before relying on them.
Covered states
From GET /v1/sales-tax/coverage, publication of 2026-10-22. Each state page lists every rate published for the state and its ZIP codes. Accuracy is the finest an answer gets: states served from Census ZIP areas are county-level, statewide-rate states have one rate for every address.
| State | Source | Best accuracy | Dates served | Files |
|---|---|---|---|---|
| Connecticut | one statewide rate (Connecticut Department of Revenue Services) | statewide rate | 2026-01-01 to 2027-04-22 | rates-CT.json, tab20_zcta520_county20_natl.txt |
| District of Columbia | one statewide rate (District of Columbia Office of Tax and Revenue) | statewide rate | 2026-01-01 to 2027-04-22 | rates-DC.json, tab20_zcta520_county20_natl.txt |
| Georgia | Streamlined Sales Tax rate and boundary files | street address | 2021-10-01 to 2026-12-31 | GAR2026Q4OCT01.csv, GAB2026Q4AUG20.zip |
| Iowa | Streamlined Sales Tax rate and boundary files | street address | 2021-10-01 to 2026-12-31 | IAR2025Q3MAY30.zip, IAB2026Q4AUG31.zip |
| Illinois | Illinois Department of Revenue rate and address files | street address | 2026-07-01 to 2026-12-31 | AllAddressRatesJul2026.zip, ordmache-current.txt, ordmacha-current.txt |
| Indiana | Streamlined Sales Tax rate and boundary files | ZIP+4 | 2021-10-01 to 2026-12-31 | INR2008Q4MAY7.csv, INB2005Q1JAN6.csv |
| Kentucky | Streamlined Sales Tax rate and boundary files | ZIP+4 | 2021-10-01 to 2026-12-31 | KYR2012Q4Aug13.csv, KYB2013Q2MAR13.csv |
| Massachusetts | one statewide rate (Massachusetts Department of Revenue) | statewide rate | 2026-01-01 to 2027-04-22 | rates-MA.json, tab20_zcta520_county20_natl.txt |
| Maryland | one statewide rate (Comptroller of Maryland) | statewide rate | 2026-01-01 to 2027-04-22 | rates-MD.json, tab20_zcta520_county20_natl.txt |
| Maine | one statewide rate (Maine Revenue Services) | statewide rate | 2026-01-01 to 2027-04-22 | rates-ME.json, tab20_zcta520_county20_natl.txt |
| Michigan | Streamlined Sales Tax rate and boundary files | 5-digit ZIP code | 2021-10-01 to 2026-12-31 | MIR2023Q1DEC22.csv, MIB2023Q1DEC15.csv |
| Minnesota | Streamlined Sales Tax rate and boundary files | ZIP+4 | 2021-10-01 to 2026-12-31 | MNR2026Q4AUG18.zip, MNB2026Q4AUG18.zip |
| North Dakota | Streamlined Sales Tax rate and boundary files | ZIP+4 | 2021-10-01 to 2026-12-31 | NDR2026Q4AUG14.zip, NDB2026Q4AUG14.zip |
| Nebraska | Streamlined Sales Tax rate and boundary files | street address | 2021-10-01 to 2026-12-31 | NER2026Q4AUG21.zip, NEB2026Q4AUG21.zip |
| New Jersey | Streamlined Sales Tax rate and boundary files | ZIP+4 | 2021-10-01 to 2026-12-31 | NJR2018Q1OCT16.zip, NJB2019Q2MAR27.csv |
| Nevada | Streamlined Sales Tax rate and boundary files | street address | 2021-10-01 to 2026-12-31 | NVR2025Q4NOV05.zip, NVB2025Q4NOV05.zip |
| Ohio | Streamlined Sales Tax rate and boundary files | street address | 2021-10-01 to 2026-12-31 | OHR2026Q4SEP17.csv, OHB2026Q4SEP17.zip |
| Oklahoma | Streamlined Sales Tax rate and boundary files | street address | 2021-10-01 to 2026-12-31 | OKR2026Q4AUG17.zip, OKB2026Q4AUG28.zip |
| Pennsylvania | Pennsylvania Department of Revenue rates on Census county areas | county-level (the county comes from Census ZIP areas) | 2026-01-01 to 2027-04-22 | rates-PA.json, tab20_zcta520_county20_natl.txt |
| Rhode Island | Streamlined Sales Tax rate and boundary files | ZIP+4 | 2021-10-01 to 2026-12-31 | RIR2019Q2MAR27.csv, RIB2019Q2MAR27.csv |
| South Dakota | Streamlined Sales Tax rate and boundary files | street address | 2021-10-01 to 2026-12-31 | SDR2026Q3JUN02.zip, SDB2026Q4SEP08.zip |
| Tennessee | Streamlined Sales Tax rate and boundary files | street address | 2021-10-01 to 2026-12-31 | TNR2026Q4AUG21.csv, TNB2026Q4AUG21.zip |
| Utah | Streamlined Sales Tax rate and boundary files | ZIP+4 | 2021-10-01 to 2026-12-31 | UTR2026Q4AUG11.csv, UTB2026Q4AUG11.csv |
| Vermont | Streamlined Sales Tax rate and boundary files | street address | 2021-10-01 to 2026-12-31 | VTR2026Q4AUG20.zip, VTB2026Q4AUG20.zip |
| Wisconsin | Streamlined Sales Tax rate and boundary files | street address | 2021-10-01 to 2026-12-31 | WIR2026Q4AUG17.csv, WIB2026Q4AUG17.zip |
| West Virginia | Streamlined Sales Tax rate and boundary files | ZIP+4 | 2021-10-01 to 2026-12-31 | WVR2026Q3FEB25.csv, WVB2026Q3APR29.csv |
| Wyoming | Streamlined Sales Tax rate and boundary files | street address | 2021-10-01 to 2026-12-31 | WYR2026Q4AUG20.CSV, WYB2026Q4AUG20.csv |
Sources
- Rates and boundaries: the Streamlined Sales Tax rate and boundary files each member state posts at streamlinedsalestax.org, as published by Olympus. Every rate in a lookup names its file and the file's date.
- Illinois, Pennsylvania and the statewide-rate states: each state revenue department's own published rates (and, for Illinois, its address file). Where the county is found from the U.S. Census Bureau's 2020 ZIP Code Tabulation Areas, the answer says so: boundary from Census, rate from the state.
- Where Olympus corrected an error in a state's own SST file, the corrected value names the correction and the state source it follows.
- Source: the Streamlined Sales Tax Governing Board rate and boundary files, as posted by each member state. The Streamlined Sales Tax Governing Board does not certify Olympus or its use of the data; Olympus is not a Certified Service Provider.
The same lookups from the API
The US Sales Tax Rates API answers the same questions with provenance on every value: GET /v1/sales-tax/rates/address and GET /v1/sales-tax/rates/zip/{zip} (API reference, product page, methodology). Without an API key they answer as the keyless demo, marked with the X-Olympus-Demo header.