# Colorado Sales Tax Guide (2026)

Canonical: https://trykintsugi.com/sales-tax-guides/usa/colorado
Published: September 22, 2026

Colorado's 2.9% state rate is deceptively low — home-rule cities lift combined rates past 9%, each with its own filing rules. Economic nexus starts at $100,000.

- **SaaS:** Partial
- **Clothing:** Taxable
- **Groceries:** Partial
- **Digital Goods:** Taxable

- **Effective date::** 

- **Scheduled change::** Software (including SaaS, cloud platforms, and downloaded apps) becomes taxable statewide on January 1, 2027 under HB 26-1223.

## Key Takeaways

Colorado's state sales tax rate is 2.9%, one of the lowest in the country, but roughly 70 home-rule cities administer their own tax, so combined rates and rules vary sharply by address [1]. You have economic nexus once sales into Colorado exceed $100,000 in the current or prior calendar year, with no transaction-count trigger [2]. SaaS is not taxed at the state level today, though home-rule cities such as Denver tax it, and digital goods are taxable statewide; food for home consumption is exempt from the state rate [3][5][1]. A Notice of Deficiency must be protested within 30 days [7].

## Taxability Snapshot

## Sales Tax Rates

Colorado's state sales tax rate is 2.9% — the lowest state rate in the US — but county, city, and special-district taxes push combined rates above 9%. Denver's combined rate is about 9.15%. Roughly 70 home-rule cities administer their own sales tax and require separate registration and filing on top of the state.

| Component | Rate | Scope |
| --- | --- | --- |
| State | 2.90% | Statewide |
| Local + district | up to ~8.3% | Varies by location |
| Combined | 2.90%–11.20% | Varies by location |

Combined rates in major Colorado cities (2026):

| City | Combined rate |
| --- | --- |
| Denver | 9.15% |
| Boulder | 9.195% |
| Aurora | 8.50% |
| Colorado Springs | 8.20% |
| Fort Collins | 7.55% |

To find the combined rate for a specific address, use our [US sales tax calculator](/us-sales-tax-calculator).

## Registration or Nexus Threshold

Colorado economic nexus applies once your sales into the state exceed $100,000 in the current or prior calendar year. There is no transaction-count trigger. Physical presence creates nexus immediately. State-collected jurisdictions are handled through the Department of Revenue, but home-rule cities require separate registration and returns.

## Marketplace Facilitator Law

Colorado's marketplace-facilitator collection requirement took effect October 1, 2019, under HB 19-1240. A marketplace facilitator must collect and remit all applicable Colorado state and state-administered local sales taxes on sales made in Colorado through its marketplace, taking on the rights, obligations, and liabilities of a retailer for those facilitated sales; a facilitator with no physical presence in Colorado is exempt only while its combined direct and facilitated Colorado sales stay under $100,000 in both the current and previous calendar year, the same threshold Colorado uses for its general remote-seller economic nexus. A marketplace seller is not required to collect state sales tax on sales made through a facilitator, and can document that relief with Form DR 1290 (Certification of Registered Marketplace Facilitator) or an explicit contract provision, though it remains responsible for tax on sales made through its own website or store.[10]

## Filing Frequency & Deadlines

For state-collected jurisdictions, Colorado returns are due the 20th of the month following the reporting period and are filed through SUTS. Home-rule cities set their own deadlines and require separate returns, which is the biggest compliance burden in the state.

#### Exemptions

Colorado exempts groceries and prescription drugs at the state level, though home-rule cities may tax groceries. SaaS is not taxable at the state level, but some home-rule cities — including Denver — tax software and SaaS, so check each city where you have nexus.

## Resale & Exemption Certificates

Colorado retailers buying for resale use their state sales tax license number as a resale certificate, or the Colorado exemption certificate (DR 0563) or a multistate certificate [6]. The buyer gives it to the seller at purchase rather than filing it with the state, and the underlying sales tax license must be renewed each two-year cycle to stay valid [6].

## Penalties

Late filing or payment carries a penalty of the greater of $15 or 10% of the tax due, plus an additional 0.5% per month and interest from the due date.

## Audits & Appeals

A taxpayer must file a written protest of a Notice of Deficiency or a rejected refund within 30 days of the notice's mailing date, a deadline the Department cannot extend [7]. Protests go first to the Tax Conferee Section for an informal conference, then to a formal hearing, with further appeal to district court [7].

## Sources

- [1] [Colorado DOR — Sales 4 (state rate, food exemption)](https://tax.colorado.gov/sites/tax/files/Sales%204.pdf)

- [2] [Colorado DOR — Out-of-State Businesses (economic nexus, home-rule)](https://tax.colorado.gov/out-of-state-businesses)

- [3] [Colorado DOR — Computer Software (SaaS not taxed at state level)](https://tax.colorado.gov/sites/tax/files/02.2021_SUTT_Computer%20Software.pdf)

- [4] [Colorado General Assembly — HB 26-1223 (software taxable from Jan 1, 2027)](https://leg.colorado.gov/bills/HB26-1223)

- [5] [Colorado DOR — Sales Tax Guide (digital goods taxable)](https://tax.colorado.gov/sales-tax-guide)

- [6] [Colorado DOR — Certificates of Exemption](https://tax.colorado.gov/certificates-of-exemption)

- [7] [Colorado DOR — Protest Rights (30 days)](https://tax.colorado.gov/protest-rights)

- [8] [Colorado General Assembly — HB 26-1048 (2027-2029 sales tax holiday)](https://leg.colorado.gov/bills/hb26-1048)

- [9] [Colorado DOR — Standard Retail License](https://tax.colorado.gov/standard-retail-license)

- [10] [Colorado Department of Revenue — Sales Tax Responsibilities of Marketplace Facilitators](https://tax.colorado.gov/marketplace-facilitators)

Verified July 2026 against Colorado Department of Revenue published guidance.

## Frequently Asked Questions

### What is the Colorado sales tax rate in 2026?

Colorado's state rate is 2.9%, the lowest in the US, but combined local rates reach about 9.15% in Denver and higher elsewhere.

### What is Colorado's economic nexus threshold?

$100,000 in sales into Colorado in the current or prior calendar year. There is no transaction-count trigger.

### Is SaaS taxable in Colorado?

Not at the state level, but some home-rule cities — including Denver — tax SaaS and software. Check each city where you have nexus.

### What are Colorado home-rule cities?

About 70 Colorado cities administer their own sales tax and require separate registration and filing in addition to the state return.

### When are Colorado sales tax returns due?

State-collected returns are due the 20th via SUTS; home-rule cities set their own deadlines and require separate returns.

### What is the penalty for late Colorado sales tax?

The greater of $15 or 10% of the tax due, plus 0.5% per month and interest.

## Related Reading

- [Colorado Clothing Sales Tax: A Complete Guide for Businesses](/blog/colorado-clothing-sales-tax)

## US Sales Tax Calculator