Rate and Boundary Files Information

Rate and Boundary Files Updates 
(lists dates updated or corrected files are available)

Access to the Rate And Boundary Files

State Sales Tax Rates
(includes links to state's local rates and tax rate calculators)

Each Streamlined member state is required to provide a rate file and a boundary file. The boundary file generally identifies the tax codes (jurisdictions) that apply to an address based on either the 5 or 9-digit zip code.  However, for some states the tax codes are based on the actual address.  The rate file provides the rates that apply to each tax code.  Single rate states that have not changed their rate since October 1, 2006 are not required to provide a rate or boundary file.

We recommend you read the Rates and Boundary Paper to help you understand what these files include and how to use the files to determine the correct tax rate.These files are created for use in your tax calculation applications to determine the tax rate.  It is difficult to determine a rate by simply looking at the files.

If you are trying to look up a rate for a particular state, the State Sales Tax Rates lists the sales tax rates for each state and has links to information about local rates and available tax rate calculators.  Use the tax rate calculators to look up tax rates for a specific address or zip code in that state.

Files are updated quarterly and are to be posted to this website by the first day of the month prior to the beginning of each calendar quarter. States are only required to post a new file if changes were made.  

Rate and Boundary Files names indicate which state the file is for and the effective date of the file.

If you have questions concerning the Rate or Boundary files, please email Registration@sstgb.org or contact Jody Bartels at: jody.bartels@sstgb.org or call at 605-368-0138.