STC provides merchants with the data and tools to determine the correct tax
sales and use taxes in over 7,000 states, counties, and cities.
Tax Rate CalculationSTC offers three types of service to
determine sales taxes:
Manual—Subscribers may use either
our online calculator or desktop calculator to calculate sales tax rates and
amounts. Here is the online form to try:
Each subscription level is good for up to one year and for up
to the number of calculations subscribed, after which time or number of
calculations you will be asked to select a new subscription level going
forward. There is no setup fee for the Manual subscriptions—simply
select the desired subscription level below after signing up on our web site!
Sales Tax Data—STC offers
regularly updated data files with sales and use tax rates by ZIP code for the
entire United States, as follows:
$ 990 per year for
four quarterly updates
$1,480 per year for
twelve monthly updates
The data format is a simple, fixed-length text file containing ZIP code,
state, county, city names, and state, county, city sales and use tax rates.
(see data file format, the license agreement, and a sample file) After subscribing,
you will receive periodic notices sent to the email address registered with
your account with instructions for where to download the update from our FTP
site and the current password to unlock the compressed ZIP file.
Automated—Merchants wanting to
perform automated or programmatic calculations will need to integrate our TaxCalc software interface module that will connect
your business system directly to our servers to calculate rates. The
license to use an automated interface that connects to our servers costs $375
and also requires a minimum annual subscription which starts at $230 per year for up to 3,200
calculations (1st year included with the license fee), with expanded subscription levels as follows:
$ 230 per year for up to
$ 350 per year for up to
$ 530 per year for up to
$ 800 per year for up to
$1,200 per year for up to
$1,800 per year for up to
$2,700 per year for up to
In either case, the tax rates are calculated in real-time with an SSL
connection to our high-speed, secure servers so the results are always 100%
current and accurate.
PLEASE NOTE that not every single change is enumerated above;
we are simply aggregating here public notices that are posted by various taxing municipalities.
Please use the form on this page to look up specific locations. Thank you!