Colorado Sales Tax Jurisdiction Codes: Lookup, DR 0100, and Fixes

A Colorado sales tax jurisdiction code is the six-digit number the Department of Revenue uses to identify every taxable location in the state, and you need the right one on every line of your sales tax return. The code tells the state which county, city, and special districts should receive the tax you collected on a given sale. You find it by looking up the specific delivery address in the state’s Geographic Information System or the Sales and Use Tax System portal, not by ZIP code and not by guessing from the city name.¹

What the Six Digits Mean

The code is formatted as two groups: a two-digit county identifier followed by a four-digit location identifier. Adams County is county 12; Arapahoe County is 10. The four-digit portion identifies the specific city, town, or unincorporated area within that county, along with any special district obligations that attach to it.²

Two suffixes come up constantly. Suffix 0206 is the generic designation for an unincorporated county area with no special district tax. If that unincorporated area sits inside a special taxing district such as the Scientific and Cultural Facilities District, the suffix becomes 0208. Sales in unincorporated Arapahoe County use 10-0208 because the SCFD applies countywide.²

Every active code is listed on the DR 0800, a reference document the Department publishes organized by county. It is useful as a lookup table, but it is not a substitute for an address-level check.²

How to Look Up a Code for a Specific Address

Colorado offers two tools, and both work from a full street address.

The Geographic Information System returns the full tax picture for a location: state, county, city, and special district rates, along with the jurisdiction code. The GIS uses spatial mapping to show overlapping tax boundaries, which matters because a single address can fall inside several taxing districts at once. You can search by street address or click a point on the map.¹

The Sales and Use Tax System portal pulls in the same GIS data and layers filing and payment on top. If you file through SUTS, the system can auto-populate the code from the address you enter, which reduces the chance of a mismatch between your delivery data and your return.³

A five-digit ZIP code is not precise enough. Tax boundaries routinely split ZIP areas, so the same ZIP can contain multiple jurisdiction codes with different rates. Always run the full street address.⁴

Which Address Decides the Code

Colorado sources sales to the destination. If a customer walks into your store and leaves with the product, the sale is sourced to the store’s location. If you ship or deliver the product, the sale is sourced to the address where the customer takes possession. When a buyer asks you to ship a gift to a third party, the sale is sourced to where that third party receives it.⁵

The practical consequence: a single retailer can owe tax to a dozen different jurisdictions in one filing period. Each delivery address could sit in a different county, city, or special district with its own code and rate. The code on your return has to match the delivery location for every shipped order, not your own storefront.

Register Non-Physical Sites Before You File

If you deliver taxable goods or services outside the jurisdiction where your business is physically located, Colorado requires you to register a non-physical site for each jurisdiction code you deliver into. Without it, there is nowhere on your return to report those sales, the tax goes unreported, and the delivery jurisdiction never receives its share.⁶

You add non-physical sites through Revenue Online. In the sales tax account panel, select “Add or Close Sales Tax Locations,” then “Add Non-Physical Locations.” Pick the month sales began at each delivery jurisdiction, select the corresponding codes, and submit. You can add multiple locations at once, and the system accepts start dates from six months in the past to three months in the future.⁶

Home Rule Cities Are Not on Your DR 0100

This is the trap. Colorado has two categories of local taxing jurisdictions, and the DR 0800 codes only cover one of them.

State-administered jurisdictions let the Department of Revenue collect their local taxes for them. You report these on your regular DR 0100 return using DR 0800 codes, and the Department distributes the revenue. One return covers them all.

Home rule, self-collecting cities set their own tax rates, define their own tax base, and collect their own taxes. They can tax items the state exempts, like groceries or construction materials. Many require separate registration, separate returns, and separate payments filed directly with the city. Failing to register with a home rule city where you have tax obligations is one of the most common and most expensive compliance mistakes businesses make in the state.

A growing number of home rule cities now participate in SUTS, which lets you file their returns through the state portal. As of 2025, roughly 60 home rule cities participate, including Arvada, Aurora, Lakewood, Littleton, Westminster, Colorado Springs, Fort Collins, Grand Junction, Pueblo, and Steamboat Springs. For home rule cities that do not participate in SUTS, you register with the city directly and file on its schedule.⁷

Putting the Codes on the DR 0100

The Colorado Retail Sales Tax Return is where the codes do their work. Each jurisdiction where you made taxable sales gets its own line. You enter the six-digit code, the taxable sales for that jurisdiction, the applicable rate, and the tax collected.⁸

If you deliver to multiple jurisdictions, each delivery jurisdiction appears as a separate line, tied to the non-physical site you registered for that code. A retailer shipping to fifteen jurisdictions in a month will have fifteen line items, each with its own code, rate, and tax amount.⁹

A transposed digit or a code borrowed from a neighboring jurisdiction routes your payment to the wrong city or county. The Department can reject filings with formatting errors or mismatched data, which creates delays and follow-up correspondence.

Fixing a Wrong Code

If you reported sales under the wrong code, file an amended return. Mark the amended return box on the form, and file a separate amended return for each filing period and each site that needs correction. The amended return replaces the original entirely, so you report the full corrected amounts for the period, not just the difference.⁹

If the correction increases your tax and you file after the original due date, penalties and interest apply to the underpayment. If the correction reduces your liability, you must file a Claim for Refund (Form DR 0137) with the amended return to get the overpayment back. The Department does not issue refunds from amended returns alone.⁹

What Code Errors Cost

A deficiency caused by negligence triggers a penalty of 10% of the tax due, plus penalty-interest that accrues until the balance is paid. Negligent retailers also forfeit any vendor’s fee they would otherwise retain.¹⁰

Late filing or late payment carries a penalty of the greater of $15 or 10% of the amount due, plus an additional 0.5% for each month the balance remains unpaid, up to a maximum of 18%. Interest accrues separately from the due date until paid. You can request a penalty waiver for good cause; interest is not waivable.¹¹

A code error is not just paperwork. The correct jurisdiction received nothing and the wrong jurisdiction received money it wasn’t owed. Sorting that out usually means amended returns across multiple periods, penalty exposure on any underpayment, and hours of back-and-forth with the Department. Running the full street address through the GIS before you file costs nothing by comparison.

1
Department of Revenue – Taxation. How to Look Up Location Codes and Tax Rates
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Colorado Department of Revenue. Location and Jurisdiction Codes for Sales Tax Filing
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Department of Revenue – Taxation. Geographic Information System Information
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Department of Revenue – Taxation. DR 0800 – Location/Jurisdiction Codes for Sales Tax Filing
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Colorado Department of Revenue. Colorado Sales Tax Guide
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Department of Revenue – Taxation. Add Locations (Sites) to Your Sales Tax Account
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Department of Revenue – Taxation. SUTS Participating Jurisdictions
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Department of Revenue – Taxation. DR 0100 – Retail Sales Tax Return
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Colorado Department of Revenue. Colorado Retail Sales Tax Return (DR 0100)
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Colorado Department of Revenue. Colorado Civil Tax Penalties and Interest
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Department of Revenue – Taxation. Penalties and Interest