Mountain West · CO
Colorado Sales Tax Guide
State sales tax plus state-administered locals, special districts, and self-collecting home-rule cities
What people ask about Colorado sales tax
Does Colorado have a statewide sales tax?
State sales tax plus state-administered locals, special districts, and self-collecting home-rule cities Colorado is one of the country's most fragmented systems. State-administered jurisdictions can be handled through Department of Revenue channels, while self-collecting home-rule cities may require separate registration, rules, and returns.
What sales tax rate and sourcing rules matter in Colorado?
The state rate is 2.9%, but destination local layers and special districts drive the combined rate. A DR 0800 site code and the correct state-administered versus home-rule boundary are essential.
What Colorado sales tax return or form is used?
The principal repository-tracked return is DR 0100. A paper channel exists, but the current form version and account eligibility still require confirmation.
How are marketplace sales reported in Colorado?
Facilitator-collected sales are generally excluded from the seller's return when the state's evidence and certification requirements are satisfied.
What resale or exemption certificate applies in Colorado?
The repository tracks Declaration of Wholesale or Entity Sales Tax Exemption. Certificate validity still depends on the purchaser, seller, claimed use, dates, signatures, and any state-specific acceptance conditions.
Does Colorado have a sales tax holiday?
The current Atlas research does not publish an active holiday rule for this state. Confirm the current revenue-department calendar before changing tax.
What special sales tax rates or excise layers apply in Colorado?
No separately verified special-rate category is published in the current member-state register for this jurisdiction. Product-specific research observations remain available below.
What does the Colorado research say about custom software?
The corpus contains one custom software observation. The research observation says the observed treatment is excluded from base; with no rate; a 0% state rate; local interaction: no local rate; sourcing: standard situs; effective from 2012-07-01. Custom software is outside the current three-part test and remains exempt under the 2027 negotiated/custom exemption. Status: Research observation — independent review required. Confirm the cited authority and transaction facts before use.
What does the Colorado research say about digital audio visual?
The corpus contains one digital audio visual observation. The research observation says the observed treatment is included in base; with general rate lookup; a 2.9% state rate; local interaction: ordinary local stack; sourcing: standard situs; effective from 2021-07-01. HB21-1312 codified video and music delivered by download or streaming as taxable digital goods effective 2021-07-01. Status: Research observation — independent review required. Confirm the cited authority and transaction facts before use.
What does the Colorado research say about prepared food?
The corpus contains one prepared food observation. The research observation says the observed treatment is included in base; with general rate lookup; a 2.9% state rate; local interaction: ordinary local stack; sourcing: standard situs; effective from 1980-01-01. Prepared food remains outside the qualifying food-for-home-consumption exemption. Status: Research observation — independent review required. Confirm the cited authority and transaction facts before use.
How Colorado's tax system is organized
Colorado is one of the country's most fragmented systems. State-administered jurisdictions can be handled through Department of Revenue channels, while self-collecting home-rule cities may require separate registration, rules, and returns.
Rates and sourcing
The state rate is 2.9%, but destination local layers and special districts drive the combined rate. A DR 0800 site code and the correct state-administered versus home-rule boundary are essential.
Tax situs is a legal determination. Mailing city, ZIP code, county proximity, and geocoding should not silently substitute for the jurisdiction rule that controls the transaction.
Product and transaction wrinkles
Product identity should be established before a rate is selected. Examples include:
- local exemptions do not always match state exemptions
- software and digital products vary across home-rule cities
- delivery charges and manufacturing exemptions can diverge by jurisdiction
These examples are not an exhaustive taxability matrix. Bundles, customer use, delivery method, exemptions, and effective dates can change the result.
Product-treatment research coverage
The underlying research inventory contains 38 Colorado treatment records across 26 product families. The inventory includes effective-date, evidence, rate-class, local-interaction, and sourcing fields. Its breadth is not a claim that every observed treatment is active in production: unresolved or independently unreviewed records remain non-operative.
38 treatment records across 26 product families.
Examples of researched product families
- utilities energy
- prewritten software
- building material
- installation service
- lodging
- nonprescription drug human
Explore all 38 Colorado research records
general tangible personal property
Research observation — independent review required
C.R.S. 39-26-104 taxes retail tangible personal property and 39-26-106 sets the 2.9 percent state rate from 2001-01-01.
- Treatment: included in base
- Rate application: general rate lookup
- Rate class: ordinary
- State rate: 2.9%
- Taxable base: retail purchase price of tangible personal property
- Local interaction: ordinary local stack
- Sourcing: standard situs
- Evidence required: canonical product identity sale price and situs
- Effective start: 2001-01-01
- Effective-window status: current 2 9 percent state rate window exact
- Runtime boundary: home rule city base and rate matrix required
- Before operational use: home-rule city matrix; independent review
clothing
Research observation — independent review required
No general state clothing exemption removes ordinary clothing from the tangible-personal-property base.
- Treatment: included in base
- Rate application: general rate lookup
- Rate class: ordinary
- State rate: 2.9%
- Taxable base: ordinary clothing is tangible personal property
- Local interaction: ordinary local stack
- Sourcing: standard situs
- Evidence required: clothing identity and situs
- Effective start: 2001-01-01
- Effective-window status: current rate window exact
- Runtime boundary: home rule city matrix required
- Before operational use: home-rule city matrix; independent review
candy
Research observation — independent review required
C.R.S. 39-26-707 makes candy taxable on and after 2010-05-01.
- Treatment: included in base
- Rate application: general rate lookup
- Rate class: ordinary
- State rate: 2.9%
- Taxable base: candy removed from food exemption
- Local interaction: ordinary local stack
- Sourcing: standard situs
- Evidence required: statutory candy identity
- Effective start: 2010-05-01
- Effective-window status: exact
- Runtime boundary: food boundary classifier required
- Before operational use: home-rule city matrix; independent review
soft drink
Research observation — independent review required
C.R.S. 39-26-707 makes soft drinks taxable on and after 2010-05-01.
- Treatment: included in base
- Rate application: general rate lookup
- Rate class: ordinary
- State rate: 2.9%
- Taxable base: soft drinks removed from food exemption
- Local interaction: ordinary local stack
- Sourcing: standard situs
- Evidence required: statutory soft drink identity
- Effective start: 2010-05-01
- Effective-window status: exact
- Runtime boundary: beverage boundary classifier required
- Before operational use: home-rule city matrix; independent review
grocery
Research observation — independent review required
C.R.S. 39-26-707 exempts qualifying food commencing 1980-01-01.
- Treatment: excluded from base
- Rate application: no rate
- Rate class: no rate
- State rate: 0%
- Taxable base: qualifying food exempt from state base
- Local interaction: product specific local
- Sourcing: standard situs
- Evidence required: food for home consumption identity
- Effective start: 1980-01-01
- Effective-window status: exact
- Runtime boundary: state exemption with product specific local food matrix required
- Before operational use: local food-base matrix; independent review
prepared food
Research observation — independent review required
Prepared food remains outside the qualifying food-for-home-consumption exemption.
- Treatment: included in base
- Rate application: general rate lookup
- Rate class: ordinary
- State rate: 2.9%
- Taxable base: prepared food outside home consumption exemption
- Local interaction: ordinary local stack
- Sourcing: standard situs
- Evidence required: prepared food identity
- Effective start: 1980-01-01
- Effective-window status: current boundary exact from food exemption start
- Runtime boundary: food boundary classifier required
- Before operational use: home-rule city matrix; independent review
construction service
Research observation — independent review required
Colorado taxes contractor-consumed property, not a generic separately stated construction-service class.
- Identity or conditions: sale context: separately stated construction labor
- Treatment: excluded from base
- Rate application: no rate
- Rate class: no rate
- State rate: 0%
- Local rate: 0%
- Taxable base: separately stated nonenumerated construction labor outside state base
- Local interaction: no local rate
- Sourcing: mixed
- Evidence required: labor material separation and project facts
- Effective-window status: current rule verified original day not pinned
- Runtime boundary: contractor consumer and jobsite resolver required
- Before operational use: pin original effective day; home-rule city matrix; independent review
State authority research source 1 · State authority research source 2
building material
Research observation — independent review required
Materials incorporated into qualifying exempt public works can be exempt with the required project documentation.
- Identity or conditions: qualifying use: exempt public project
- Treatment: excluded from base
- Rate application: no rate
- Rate class: no rate
- State rate: 0%
- Local rate: 0%
- Taxable base: qualifying public project material exemption
- Local interaction: no local rate
- Sourcing: mixed
- Evidence required: project exemption certificate
- Effective-window status: reported 1979 exact day not pinned
- Runtime boundary: project qualification resolver required
- Before operational use: pin exact 1979 day; home-rule city matrix; independent review
State authority research source 1 · State authority research source 2
building material
Research observation — independent review required
A contractor is the consumer of nonqualifying building materials and owes sales or use tax.
- Identity or conditions: qualifying use: ordinary or nonqualifying project
- Treatment: included in base
- Rate application: general rate lookup
- Rate class: ordinary
- State rate: 2.9%
- Taxable base: contractor is consumer of nonexempt materials
- Local interaction: ordinary local stack
- Sourcing: mixed
- Evidence required: project type and jobsite
- Effective-window status: current rule verified original day not pinned
- Runtime boundary: contractor use tax and jobsite resolver required
- Before operational use: pin original day; home-rule city matrix; independent review
State authority research source 1 · State authority research source 2
custom software
Research observation — independent review required
Custom software is outside the current three-part test and remains exempt under the 2027 negotiated/custom exemption.
- Treatment: excluded from base
- Rate application: no rate
- Rate class: no rate
- State rate: 0%
- Local rate: 0%
- Taxable base: custom software excluded
- Local interaction: no local rate
- Sourcing: standard situs
- Evidence required: custom development identity
- Effective start: 2012-07-01
- Effective-window status: current and 2027 continuation verified
- Runtime boundary: custom versus prepackaged classifier required
- Before operational use: home-rule city matrix; independent review
State authority research source 1 · State authority research source 2 · State authority research source 3
digital audio visual
Research observation — independent review required
HB21-1312 codified video and music delivered by download or streaming as taxable digital goods effective 2021-07-01.
- Treatment: included in base
- Rate application: general rate lookup
- Rate class: ordinary
- State rate: 2.9%
- Taxable base: digital video and music are tangible personal property
- Local interaction: ordinary local stack
- Sourcing: standard situs
- Evidence required: digital media identity
- Effective start: 2021-07-01
- Effective-window status: exact
- Runtime boundary: digital media software boundary required
- Before operational use: home-rule city matrix; independent review
State authority research source 1 · State authority research source 2
digital book
Research observation — independent review required
HB21-1312 codified electronic books as taxable digital goods effective 2021-07-01.
- Treatment: included in base
- Rate application: general rate lookup
- Rate class: ordinary
- State rate: 2.9%
- Taxable base: electronic books are tangible personal property
- Local interaction: ordinary local stack
- Sourcing: standard situs
- Evidence required: digital book identity
- Effective start: 2021-07-01
- Effective-window status: exact
- Runtime boundary: digital media classifier required
- Before operational use: home-rule city matrix; independent review
State authority research source 1 · State authority research source 2
durable medical equipment
Research observation — independent review required
DME is exempt only after the item meets the statutory definition, which expressly requires dispensing pursuant to a prescription order.
- Identity or conditions: required certificate: prescription order
- Treatment: excluded from base
- Rate application: no rate
- Rate class: no rate
- State rate: 0%
- Local rate: 0%
- Taxable base: statutory durable medical equipment exempt
- Local interaction: no local rate
- Sourcing: standard situs
- Evidence required: prescription order and four part item test
- Effective-window status: reported 1980 exact day not pinned
- Runtime boundary: prescription and item definition resolver required
- Before operational use: pin exact 1980 day; home-rule city matrix; independent review
State authority research source 1 · State authority research source 2
installation service
Research observation — independent review required
Generic separately stated installation labor is not an enumerated Colorado state taxable service.
- Identity or conditions: sale context: separately stated installation labor
- Treatment: excluded from base
- Rate application: no rate
- Rate class: no rate
- State rate: 0%
- Local rate: 0%
- Taxable base: separately stated nonenumerated installation labor outside state base
- Local interaction: no local rate
- Sourcing: standard situs
- Evidence required: separate statement and service identity
- Effective-window status: current rule verified original day not pinned
- Runtime boundary: bundling resolver required
- Before operational use: pin original day; home-rule city matrix; independent review
installation service
Research observation — independent review required
C.R.S. 39-26-102(12) includes labor and service in the full price of manufactured or made-to-order articles.
- Identity or conditions: sale context: included in manufactured or made to order property price
- Treatment: included in base
- Rate application: general rate lookup
- Rate class: ordinary
- State rate: 2.9%
- Taxable base: inseparable service charge included in full property price
- Local interaction: ordinary local stack
- Sourcing: standard situs
- Evidence required: invoice and bundle facts
- Effective-window status: current rule verified original day not pinned
- Runtime boundary: bundling resolver required
- Before operational use: pin original day; home-rule city matrix; independent review
lodging
Research observation — independent review required
Short-term rooms and accommodations are taxable; the long-term permanent-resident exemption does not apply below 30 consecutive days.
- Identity or conditions: maximum rental days: 29
- Treatment: included in base
- Rate application: general rate lookup
- Rate class: ordinary
- State rate: 2.9%
- Taxable base: short term rooms and accommodations taxable
- Local interaction: product specific local
- Sourcing: standard situs
- Evidence required: stay length property and local lodging levies
- Effective-window status: reported 1959 exact day not pinned
- Runtime boundary: stay length and local lodging tax resolver required
- Before operational use: pin exact 1959 day; local lodging matrix; independent review
State authority research source 1 · State authority research source 2
lodging
Research observation — independent review required
A qualifying natural-person permanent resident with the statutory occupancy agreement is exempt.
- Identity or conditions: lodging type: permanent resident qualifying written agreement
- Treatment: excluded from base
- Rate application: no rate
- Rate class: no rate
- State rate: 0%
- Local rate: 0%
- Taxable base: qualifying long term permanent resident exemption
- Local interaction: no local rate
- Sourcing: standard situs
- Evidence required: natural person stay length and written agreement
- Effective-window status: reported 1959 exact day not pinned
- Runtime boundary: occupancy agreement resolver required
- Before operational use: pin exact 1959 day; local lodging matrix; independent review
State authority research source 1 · State authority research source 2
manufacturing input
Research observation — independent review required
C.R.S. 39-26-102(20) treats qualifying incorporated and processing inputs as exempt wholesale sales.
- Identity or conditions: qualifying use: component or processing input
- Treatment: excluded from base
- Rate application: no rate
- Rate class: no rate
- State rate: 0%
- Local rate: 0%
- Taxable base: qualifying component and processing inputs are wholesale
- Local interaction: no local rate
- Sourcing: standard situs
- Evidence required: component incorporation or processing use documentation
- Effective-window status: current rule verified original day not pinned
- Runtime boundary: qualifying use resolver required
- Before operational use: pin original day; home-rule city matrix; independent review
nonprescription drug human
Research observation — independent review required
Nonprescription drugs are exempt when furnished by a practitioner as part of professional services to a patient.
- Identity or conditions: intended user: human; prescription status: nonprescription; sale context: furnished by practitioner with professional services
- Treatment: excluded from base
- Rate application: no rate
- Rate class: no rate
- State rate: 0%
- Local rate: 0%
- Taxable base: practitioner furnished nonprescription drug exempt
- Local interaction: no local rate
- Sourcing: standard situs
- Evidence required: practitioner and patient service context
- Effective-window status: reported 1980 exact day not pinned
- Runtime boundary: practitioner context resolver required
- Before operational use: pin exact 1980 day; home-rule city matrix; independent review
State authority research source 1 · State authority research source 2
nonprescription drug human
Research observation — independent review required
The exemption is limited to practitioner-furnished items, so ordinary retail OTC drugs remain taxable.
- Identity or conditions: intended user: human; prescription status: nonprescription; sale context: ordinary retail sale
- Treatment: included in base
- Rate application: general rate lookup
- Rate class: ordinary
- State rate: 2.9%
- Taxable base: ordinary retail otc drug sale taxable
- Local interaction: ordinary local stack
- Sourcing: standard situs
- Evidence required: ordinary retail context
- Effective-window status: current rule verified original day not pinned
- Runtime boundary: practitioner context resolver required
- Before operational use: pin original day; home-rule city matrix; independent review
State authority research source 1 · State authority research source 2
prescription drug human
Research observation — independent review required
C.R.S. 39-26-717 exempts human prescription drugs; OSA reports enactment in 1965.
- Identity or conditions: intended user: human; prescription status: prescription
- Treatment: excluded from base
- Rate application: no rate
- Rate class: no rate
- State rate: 0%
- Local rate: 0%
- Taxable base: human prescription drugs exempt
- Local interaction: no local rate
- Sourcing: standard situs
- Evidence required: prescription and human use identity
- Effective-window status: reported 1965 exact day not pinned
- Runtime boundary: prescription evidence required
- Before operational use: pin exact 1965 day; home-rule city matrix; independent review
State authority research source 1 · State authority research source 2
prewritten software
Research observation — independent review required
Through 2026, prewritten software is taxable only when the repeated-sale, nonnegotiable-license, and tangible-medium tests all apply.
- Identity or conditions: transfer method: physical; subtype: prepackaged nonnegotiable tangible medium
- Treatment: included in base
- Rate application: general rate lookup
- Rate class: ordinary
- State rate: 2.9%
- Taxable base: current three part software test satisfied
- Local interaction: ordinary local stack
- Sourcing: standard situs
- Evidence required: prepackaged license and delivery facts
- Effective start: 2012-07-01
- Effective end: 2026-12-31
- Effective-window status: exact
- Runtime boundary: three part software test required
- Before operational use: home-rule city matrix; independent review
State authority research source 1 · State authority research source 2
prewritten software
Research observation — independent review required
HB11-1293's exemption became effective 2012-07-01, not in 2011; electronic and load-and-leave delivery are outside the current tangible-medium test.
- Identity or conditions: transfer method: electronic; subtype: downloaded or load and leave
- Treatment: excluded from base
- Rate application: no rate
- Rate class: no rate
- State rate: 0%
- Local rate: 0%
- Taxable base: electronic or load and leave delivery fails current tangible medium test
- Local interaction: no local rate
- Sourcing: standard situs
- Evidence required: delivery and license facts
- Effective start: 2012-07-01
- Effective end: 2026-12-31
- Effective-window status: exact
- Runtime boundary: three part software test required
- Before operational use: home-rule city matrix; independent review
State authority research source 1 · State authority research source 2
prewritten software
Research observation — independent review required
HB26-1223 taxes prepackaged repeated-sale software regardless of delivery method or remote access beginning 2027-01-01, while preserving negotiated and custom exemptions.
- Identity or conditions: subtype: prepackaged repeated sale nonnegotiable or remote access
- Treatment: included in base
- Rate application: general rate lookup
- Rate class: ordinary
- State rate: 2.9%
- Taxable base: prepackaged repeated sale software taxable regardless of delivery or remote access
- Local interaction: ordinary local stack
- Sourcing: standard situs
- Evidence required: software standardization and license facts
- Effective start: 2027-01-01
- Effective-window status: future exact
- Runtime boundary: 2027 software boundary resolver required
- Before operational use: future runtime support; home-rule city matrix; independent review
professional service
Research observation — independent review required
Generic professional services are not among the services enumerated in C.R.S. 39-26-104.
- Treatment: excluded from base
- Rate application: no rate
- Rate class: no rate
- State rate: 0%
- Local rate: 0%
- Taxable base: generic professional service not enumerated
- Local interaction: no local rate
- Sourcing: standard situs
- Evidence required: service identity against closed enumeration
- Effective-window status: current rule verified original day not pinned
- Runtime boundary: enumerated service classifier required
- Before operational use: pin original day; home-rule city matrix; independent review
rental
Research observation — independent review required
A lease of three years or less is exempt when the lessor paid Colorado sales or use tax on acquisition.
- Identity or conditions: maximum rental days: 1095; rented product: tangible personal property; sale context: lessor paid tax on acquisition
- Treatment: excluded from base
- Rate application: no rate
- Rate class: no rate
- State rate: 0%
- Local rate: 0%
- Taxable base: short lease stream exempt when lessor paid acquisition tax
- Local interaction: no local rate
- Sourcing: standard situs
- Evidence required: lease term and lessor acquisition tax evidence
- Effective-window status: current rule verified original day not pinned
- Runtime boundary: lessor election resolver required
- Before operational use: pin original day; home-rule city matrix; independent review
rental
Research observation — independent review required
A lessor can acquire tax-free and collect tax on lease payments under the statutory election.
- Identity or conditions: rented product: tangible personal property; sale context: lessor elected tax free acquisition and taxable payments
- Treatment: included in base
- Rate application: general rate lookup
- Rate class: ordinary
- State rate: 2.9%
- Taxable base: lease payments taxable under lessor election
- Local interaction: ordinary local stack
- Sourcing: standard situs
- Evidence required: lessor election and payment situs
- Effective-window status: current rule verified original day not pinned
- Runtime boundary: lessor election resolver required
- Before operational use: pin original day; home-rule city matrix; independent review
repair service
Research observation — independent review required
Separately stated generic repair labor is not an enumerated taxable service; transferred parts remain property.
- Identity or conditions: sale context: separately stated repair labor
- Treatment: excluded from base
- Rate application: no rate
- Rate class: no rate
- State rate: 0%
- Local rate: 0%
- Taxable base: separately stated nonenumerated repair labor outside base
- Local interaction: no local rate
- Sourcing: standard situs
- Evidence required: labor parts separation
- Effective-window status: current rule verified original day not pinned
- Runtime boundary: repair parts bundling resolver required
- Before operational use: pin original day; home-rule city matrix; independent review
repair service
Research observation — independent review required
Labor and service included in the full price of manufactured or made-to-order property enter the taxable price.
- Identity or conditions: sale context: inseparable fabricated or made to order property charge
- Treatment: included in base
- Rate application: general rate lookup
- Rate class: ordinary
- State rate: 2.9%
- Taxable base: inseparable labor and service included in property price
- Local interaction: ordinary local stack
- Sourcing: standard situs
- Evidence required: invoice and fabrication facts
- Effective-window status: current rule verified original day not pinned
- Runtime boundary: repair parts bundling resolver required
- Before operational use: pin original day; home-rule city matrix; independent review
resale
Research observation — independent review required
Documented wholesale sales for resale are excluded from the retail base.
- Identity or conditions: required certificate: resale or wholesale documentation
- Treatment: excluded from base
- Rate application: no rate
- Rate class: no rate
- State rate: 0%
- Local rate: 0%
- Taxable base: documented wholesale sale outside retail base
- Local interaction: no local rate
- Sourcing: standard situs
- Evidence required: resale intent and certificate
- Effective-window status: current rule verified original day not pinned
- Runtime boundary: resale document resolver required
- Before operational use: pin original day; home-rule city matrix; independent review
saas
Research observation — independent review required
ASP-hosted software access is outside the state tangible-medium test through 2026-12-31.
- Identity or conditions: use term: continued payment; subtype: application service provider hosted access
- Treatment: excluded from base
- Rate application: no rate
- Rate class: no rate
- State rate: 0%
- Local rate: 0%
- Taxable base: asp hosted access fails current tangible medium test
- Local interaction: no local rate
- Sourcing: standard situs
- Evidence required: hosted access and no tangible medium facts
- Effective start: 2012-07-01
- Effective end: 2026-12-31
- Effective-window status: exact
- Runtime boundary: hosted software classifier required
- Before operational use: home-rule city matrix; independent review
State authority research source 1 · State authority research source 2
saas
Research observation — independent review required
HB26-1223 brings remote access to prepackaged repeated-sale software into the base on 2027-01-01 unless a negotiated or custom exemption applies.
- Identity or conditions: use term: continued payment; subtype: prepackaged repeated sale remote access
- Treatment: included in base
- Rate application: general rate lookup
- Rate class: ordinary
- State rate: 2.9%
- Taxable base: remote access prepackaged repeated sale software taxable
- Local interaction: ordinary local stack
- Sourcing: standard situs
- Evidence required: remote access standardization and license facts
- Effective start: 2027-01-01
- Effective-window status: future exact
- Runtime boundary: 2027 software boundary resolver required
- Before operational use: future runtime support; home-rule city matrix; independent review
shipping
Research observation — independent review required
Title 39 excludes statutory retail delivery fees but the pinned set does not independently resolve every seller freight and delivery-charge pattern.
- Treatment: unresolved
- Rate application: special rate required
- Rate class: unresolved
- Taxable base: retail delivery fee excluded but seller delivery and freight patterns not fully resolved
- Local interaction: unresolved
- Sourcing: unresolved
- Evidence required: current cdor delivery charge guidance
- Effective-window status: current primary detail incomplete
- Runtime boundary: shipping charge boundary authority required
- Before operational use: pin current CDOR delivery guidance; home-rule city matrix; independent review
telecommunications
Research observation — independent review required
Beginning 2025-07-01, Colorado taxes interstate telephone and telegraph service that originates or terminates in Colorado and is charged to a Colorado address, in addition to intrastate service; a foreign-state credit can apply.
- Identity or conditions: subtype: intrastate or qualifying interstate telephone or telegraph
- Treatment: included in base
- Rate application: general rate lookup
- Rate class: ordinary
- State rate: 2.9%
- Taxable base: intrastate and qualifying interstate telephone and telegraph taxable
- Local interaction: product specific local
- Sourcing: special
- Evidence required: origination termination service address and foreign tax credit facts
- Effective start: 2025-07-01
- Effective-window status: current expanded window exact
- Runtime boundary: telecom sourcing and credit resolver required
- Before operational use: telecom sourcing resolver; local telecom matrix; independent review
State authority research source 1 · State authority research source 2
utilities energy
Research observation — independent review required
Qualifying residential gas and electricity use is exempt at the state level.
- Identity or conditions: purchaser use: residential energy use
- Treatment: excluded from base
- Rate application: no rate
- Rate class: no rate
- State rate: 0%
- Local rate: 0%
- Taxable base: qualifying residential energy exempt
- Local interaction: no local rate
- Sourcing: standard situs
- Evidence required: meter and residential use facts
- Effective-window status: current rule verified original day not pinned
- Runtime boundary: energy use classifier required
- Before operational use: pin original day; local energy matrix; independent review
utilities energy
Research observation — independent review required
Commercial gas, electric, and steam consumption is enumerated in the state taxable base unless a specific use exemption applies.
- Identity or conditions: purchaser use: ordinary commercial consumption
- Treatment: included in base
- Rate application: general rate lookup
- Rate class: ordinary
- State rate: 2.9%
- Taxable base: ordinary commercial gas electric and steam taxable
- Local interaction: product specific local
- Sourcing: standard situs
- Evidence required: meter and commercial use facts
- Effective-window status: current rule verified original day not pinned
- Runtime boundary: energy use classifier required
- Before operational use: pin original day; local energy matrix; independent review
utilities energy
Research observation — independent review required
C.R.S. 39-26-102(21) exempts enumerated processing, manufacturing, mining, refining, irrigation, construction, communications, and transportation energy uses.
- Identity or conditions: purchaser use: enumerated industrial processing use
- Treatment: excluded from base
- Rate application: no rate
- Rate class: no rate
- State rate: 0%
- Local rate: 0%
- Taxable base: enumerated industrial and processing energy uses exempt
- Local interaction: no local rate
- Sourcing: standard situs
- Evidence required: meter and qualifying use documentation
- Effective-window status: current rule verified original day not pinned
- Runtime boundary: energy use classifier required
- Before operational use: pin original day; local energy matrix; independent review
utilities energy
Research observation — independent review required
HB26-1223's substantive text names 2026-07-01 for the prepared-food energy provision while its applicability clause points to 2027-01-01; the branch remains unresolved rather than selecting a favorable date.
- Identity or conditions: purchaser use: prepared food retailer hb26 1223 branch
- Treatment: unresolved
- Rate application: special rate required
- Rate class: unresolved
- Taxable base: prepared food retailer energy exemption or credit applicability conflict
- Local interaction: unresolved
- Sourcing: unresolved
- Evidence required: cdor implementation guidance resolving enacted date conflict
- Effective start: 2026-07-01
- Effective-window status: reported needs primary
- Runtime boundary: fail closed pending cdor guidance
- Before operational use: CDOR implementation guidance; local energy matrix; independent review
State authority research source 1 · State authority research source 2
Returns and filing workflows
The principal repository-tracked return is DR 0100. A paper channel exists, but the current form version and account eligibility still require confirmation.
- Tracked form version: DR 0100 (09/19/25) - effective January 1, 2026 and beyond
- Paper filing posture: accepted
- Account data required: state tax account number, legal business name, mailing address, filing frequency
Repository-verified workflow outputs
- Worksheet for portal entry
- Portal upload file
Marketplace-facilitated sales
Facilitator-collected sales are generally excluded from the seller's return when the state's evidence and certification requirements are satisfied.
Registration, nexus thresholds, zero-return obligations, facilitator certifications, and direct sales must be evaluated separately.
Exemption documentation
The repository tracks Declaration of Wholesale or Entity Sales Tax Exemption. Certificate validity still depends on the purchaser, seller, claimed use, dates, signatures, and any state-specific acceptance conditions.
A certificate should be tied to the correct customer, seller, state, reason, product use, effective period, and transaction population.
How Prophit supports the work
Prophit currently structures Colorado transaction data for worksheet for portal entry, portal upload file. Availability is kept separate from customer credentials, state acceptance, and direct transmission authority.
- Research coverage — Inventory tracked: 38 treatment records across 26 product families
- Jurisdiction logic — Evidence-gated: State, local, sourcing, and special-regime facts require current situs evidence
- Workflow output — Available: Worksheet for portal entry, Portal upload file
- Direct transmission — Authority-gated: Not represented by this public guide as authorized or available
Product availability varies by jurisdiction and customer configuration. Workflow support does not establish registration, filing authority, credentials, agency acceptance, or tax advice.
Official and reviewed sources
Rules change. Confirm the current source and effective period before acting.
- Colorado official rate or boundary source
- Colorado tax authority or filing guidance
- Colorado tax authority or filing guidance
- Colorado tax authority or filing guidance
- Colorado tax authority or filing guidance
- Colorado tax authority or filing guidance
- Colorado tax authority or filing guidance
- Colorado tax authority or filing guidance