Colorado Sales Tax Bulk Address Lookup Suspended

The Colorado Department of Revenue (DOR) has temporarily suspended its Sales Tax Bulk Address Lookup service through the end of 2026 due to demand significantly exceeding the program’s funding.

1. The service was funded for approximately 75 million lookups per year.

1. FY 2025–26 usage reached 136.5 million lookups.
2. More than 50 million lookups were processed during the first three months of FY 2026–27 alone.

Colorado’s Single-Address GIS Lookup Tool remains available and free to use.

For organizations that regularly process thousands—or even millions—of addresses, however, the temporary suspension creates an immediate operational challenge.

Are you Affected?

The organizations most affected are those that rely on batch address processing as part of their daily operations.

Common examples include:

• Ecommerce platforms processing customer orders
• ERP systems validating customer addresses
• Retailers preparing tax calculations for large order files
• Businesses updating order and customer databases
• Mailing and fulfillment operations

For these organizations, manually looking up one address at a time through Colorado’s online GIS Lookup Tool is simply not practical.

Alternative Solutions to Sales Tax Address Lookup

Organizations that relied on Colorado’s Sales Tax Bulk Address Lookup generally have three options:

1. Continue using Colorado’s online Single-Address GIS Lookup Tool for occasional lookups.
2. Integrate a real-time Address-Based Sales Tax API into their applications or ERP systems.
3. Use a batch processing service to process entire spreadsheets of addresses.

USgeocoder provides Address-Based Sales Tax Determination through three delivery methods:

1. Online Lookup Tool
2. Real-Time API (Sales Tax API Resource Hub)
3. High-Volume Batch Processing

Whether you need an online lookup tool, a real-time API, or high-volume batch processing, the underlying goal is the same: accurately determining sales tax from a street address.

For batch processing, customers can submit spreadsheets containing structured address fields or latitude/longitude coordinates. Our service returns detailed sales tax information for each address, including:

• Standardized address
• ZIP+4 and carrier route
• Latitude and longitude
• State, county, municipality, and applicable special tax districts
• State-issued tax reporting codes (where applicable, such as Colorado’s Jurisdiction Code)
• Detailed tax rate breakdown by jurisdiction
• Total sales tax rate

For organizations operating beyond Colorado, the same services are available across all 50 states and Washington, D.C.

Here is the screenshot of the information that CO DOR produces for address “24495 E 35^th Drive, Aurora, CO 80019”:

Figure 1. Colorado Department of Revenue Single-Address GIS Lookup result

The following XML output shows the information USgeocoder returns for the same address. Each XML element corresponds to a column in the batch output CSV file.

<address_info>
<address_status>Match Found</address_status><street>24495 E 35TH DR</street><city>Aurora</city><county>Adams</county><state>CO</state><zip5>80019</zip5></address_info>
<zipcode_carrierroute>
<zip9><zip9_status>Match Found</zip9_status><zip9_value>80019-3745</zip9_value></zip9>
<carrier_route><carrier_route_status>Match Found</carrier_route_status><carrier_route_value>R093</carrier_route_value></carrier_route>
</zipcode_carrierroute>

<totalcollection_tax_details><t_tax_details_status>Match Found</t_tax_details_status><t_tax_total_tax>8.5000%</t_tax_total_tax><t_tax_state_jurisction_name>CO</t_tax_state_jurisction_name><t_tax_state_tax>2.9000%</t_tax_state_tax><t_tax_county_jurisdiction_name>Adams</t_tax_county_jurisdiction_name><t_tax_county_tax>0.7500%</t_tax_county_tax><t_tax_county_district1_name>Adams County Sales Tax</t_tax_county_district1_name><t_tax_county_district1_abbr></t_tax_county_district1_abbr><t_tax_county_district1_tax>0.7500%</t_tax_county_district1_tax><t_tax_city_jurisdiction_name>Aurora</t_tax_city_jurisdiction_name><t_tax_city_tax>3.7500%</t_tax_city_tax><t_tax_city_district1_name>Aurora City Sales Tax</t_tax_city_district1_name><t_tax_city_district1_abbr></t_tax_city_district1_abbr><t_tax_city_district1_tax>3.7500%</t_tax_city_district1_tax><t_tax_special_district1_name>Colorado Regional Transportation District Sales Ta</t_tax_special_district1_name><t_tax_special_district1_abbr>RTD</t_tax_special_district1_abbr><t_tax_special_district1_tax>1.0000%</t_tax_special_district1_tax><t_tax_special_district2_name>Colorado Scientific and Cultural Facilities Distri</t_tax_special_district2_name><t_tax_special_district2_abbr>CD</t_tax_special_district2_abbr><t_tax_special_district2_tax>0.1000%</t_tax_special_district2_tax><t_tax_incorporated_city>Aurora</t_tax_incorporated_city><t_tax_code>12-0003</t_tax_code><t_tax_effective_date>01/01/2023</t_tax_effective_date><t_tax_usgid>CO00003</t_tax_usgid></totalcollection_tax_details>

The table below compares the core capabilities of Colorado’s SUTS service and USgeocoder.

 

 

 

 

 

 

 

 

 

 

Final Thoughts

Colorado’s temporary suspension of its Sales Tax Bulk Address Lookup service demonstrates how many organizations now depend on high-volume address processing for accurate sales tax determination.

If your organization is looking for a temporary or long-term alternative, we’d be happy to discuss your workflow. Contact us at 888-938-6732, start a Live Chat on USgeocoder.com, or visit our Contact Us page.