DOTS FastTax
Accurate and Up-to-Date
Sales & Use Tax Rates for
Every Address in US & Canada
Synced with Tax Authorities to Ensure Up-To-Date Rates
Integrated Geolocation and Address Verification Guarantees Accuracy
Real-Time API Allows Seamless Integration

Our real-time FastTax service uses location to determine the correct sales and use tax rates for both US and Canada. When an address is provided, FastTax uses our federally certified Address Validation service to establish address correctness and ZIP+4. If an address is not available, the service can use postal code, city/state, or city/county/state to determine location. With location determined, FastTax can identify tax jurisdiction and boundaries, resolve address issues, provide alternate city names, and eliminate problems associated with different rates in incorporated vs. unincorporated areas.

Service Objects’ FastTax data is continuously synchronized with state and province updates, ensuring the correct tax rates are charged throughout the year.

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How FastTax Works
Please select the country and location with tax type (sales/use) to see how our service returns accurate tax rates for the location provided.


Choose from common use cases

Postal Code
Tax Type

Request URL

Real-Time API Responses

See below for the full response from our FastTax service.

Service Response


Please select input data to see results

CitySanta Barbara
CountySanta Barbara
State AbbreviationCa
State NameCalifornia
Tax Rate0.0775
State Rate0.06
City Rate0
County Rate0.0125
County District Rate0.005
City District Rate0
Special District Rate0
Information ComponentsArray
Total Tax ExemptLabor/freight/services
Notes Codes
Notes Desc
View Full results


For Developers

Our services are built API-first with a focus on data quality and ease of integration.
We support REST, SOAP, GET and POST requests over HTTP/S outputting in XML and JSON formats.

Our API web services are compatible with all major programming languages and we have over 200 pieces of sample code (both snippets and full solutions) available to help with your integration.

Features and Benefits




Uptime Guarantee


Support Engineers

  • Coverage for both US and Canada
  • Maintains over 130,000 tax rates
  • Real-time synchronization with State tax authorities, where available, and/or updated monthly
  • Built-in address validation and correction ensures correct tax rates are applied
  • By using street and address-level information we provide the highest level of accuracy possible
  • Identifies tax rates by street address, postal code, city/state, or city/county/state
  • Real-time RESTful API or batch services available
  • Response time as fast as 100 milliseconds
  • 99.999% uptime
  • High resolution map data can distinguish between incorporated and unincorporated areas
  • Handles many different input combinations
  • Provides a composite tax rate and individual components:
    • State
    • County
    • City
    • District
    • Special rates
  • Supplies list of Tax Exempt Items by tax location
  • Integrates directly with most e-Commerce platforms
  • Multi-State Nexus supported
Additional Resources
Three Ways to Use FastTax
Real-Time API
Cloud Connectors
Connects with major marketing, sales and
ecommerce platforms
List Processing
Securely upload lists
for processing

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