Colorado sales tax rates 2026: Calculator, nexus, and due dates

Colorado sales tax rates by city and county

Colorado’s sales tax structure is heavily layered. The 2.9% state rate is among the lowest in the country, but counties, cities, and special districts add their own taxes on top — meaning the combined rate varies dramatically by location. Some areas of Aspen exceed 11%, while unincorporated rural areas may charge as little as 2.9%.

Because Colorado is a destination-based state, you charge the rate based on where your customer receives the product, not where your business is located. For state-collected jurisdictions, all filings go through the Colorado Department of Revenue via the Sales & Use Tax System (SUTS). However, approximately 70 home-rule cities — including Denver, Aurora, Boulder, and Colorado Springs — require separate registration and filing directly with the city.

Major Colorado cities and their 2026 combined rates:

Colorado sales tax calculator

Can’t find your city? Use our Colorado sales tax calculator to look up the exact sales tax rate for any Colorado address.

TaxCloud’s sales tax calculation engine calculates to the rooftop level — because rates can vary within the same ZIP code, and zip-level estimates aren’t accurate enough for compliance.

Colorado nexus thresholds

Every business with customers in Colorado is subject to nexus laws. You are required to register and collect sales tax if you trigger “nexus” through a physical presence in the state or by exceeding specific economic thresholds as a remote seller.

Colorado economic nexus

You will trigger Colorado economic nexus if you exceed the following threshold in the current or previous calendar year:

• Sales threshold: $100,000 in gross sales into Colorado (including marketplace sales).
• Transaction threshold: None (Colorado is dollar-volume only).

Gross sales include taxable and exempt sales of tangible personal property and taxable services delivered into Colorado. You have 90 days after crossing the threshold to register and begin collecting — you must start on the first day of the first month that begins at least 90 days after the threshold is met. If you exceeded the threshold in the prior calendar year, you must register and begin collecting by January 1 of the current year.

Colorado physical nexus

You have physical nexus (and must register from dollar one) if you have:

• Inventory: Storing goods in a warehouse, 3PL, or Amazon FBA fulfillment center in Colorado.
• Personnel: Employees, contractors, sales reps, or agents based in the state — including home-based remote employees.
• Property: Maintaining an office, distribution center, salesroom, warehouse, or other place of business in Colorado.

Colorado sales tax permit registration

Once you trigger nexus, you must register with the Colorado Department of Revenue before you can legally collect sales tax.

Operating without a permit after crossing the threshold exposes you to back taxes, penalties, and interest from the date nexus was established — not the date you registered.

1. Gather your information. You’ll need your FEIN, estimated sales, business structure details, and bank account information.
2. Submit your application. Use the MyBizColorado portal to apply for your sales tax license. State registration covers state-collected jurisdictions. However, approximately 70 home-rule cities — including Denver, Aurora, Boulder, and Colorado Springs — require separate registration directly with each city.
3. Note your effective date. Colorado requires you to begin collecting sales tax within 90 days of exceeding the economic nexus threshold. If there’s a gap, you may owe back taxes for that period.

If you have questions about your Colorado registration or compliance history, TaxCloud’s U.S.-based support team typically responds within 2 hours and can review your setup directly.

Colorado sales tax calculation rules

Colorado’s 2.9% state rate is deceptively low — the real complexity is in the local layer. With approximately 70 home-rule cities administering their own taxes independently, sellers must track separate rates, exemptions, and filing obligations for each jurisdiction where they have customers.

What is taxable in Colorado?

Taxability in Colorado is determined by how a product is classified under state law. Below is a high-level summary for 2026:

• Tangible personal property: Most physical goods — such as furniture, electronics, and standard retail items — are subject to sales tax unless a specific exemption applies.
• SaaS, software, and digital products: Colorado does not tax SaaS or electronically delivered software at the state level. However, digital goods (eBooks, music, streaming) are taxable. Home-rule cities like Denver tax SaaS independently — sellers must verify local rules for each delivery address.
• Food & groceries: Colorado exempts food and food ingredients purchased for home consumption from state sales tax. However, many local jurisdictions — including some home-rule cities — impose their own tax on groceries.
• Clothing: Clothing and footwear are taxable at the standard state and local rates. Colorado does not provide a clothing exemption.

What is tax exempt in Colorado?

Colorado provides sales tax exemptions for essential goods and specific categories:

• Essential exemptions: Prescription medications, insulin, prosthetic devices, and certain medical equipment are exempt.
• Additional exemptions: Food for home consumption (state level), sales for resale (with a valid Colorado exemption certificate), machinery and machine tools used in manufacturing, and coins and precious metal bullion (exempt from state and state-administered local taxes effective 2025).

Colorado sales tax return due dates and filing frequency

Filing frequency is assigned by the Colorado Department of Revenue based on your monthly tax liability. In Colorado, returns are due on the 20th of the month following the reporting period.

Critical 2026 compliance notes:

• State vendor fee eliminated: Effective January 1, 2026, Colorado retailers may no longer retain the state sales tax service fee (vendor discount) that previously allowed timely filers to keep a small percentage of collected state tax. Local jurisdiction vendor fees may still apply — check each jurisdiction’s rules.
• Home-rule filing trap: Registering and filing with the Colorado Department of Revenue does not cover home-rule cities. Denver, Aurora, Boulder, Colorado Springs, and approximately 70 other cities require separate registration and filing through their own portals. Missing a home-rule city is the most common compliance gap for remote sellers in Colorado.
• Zero-return requirement: If you are registered but had $0 in sales this period, you must still file. The Department of Revenue will estimate a return on your behalf and bill you if you fail to file — regardless of whether tax is owed.
• EFT requirement: Businesses that pay more than $75,000 per year in state sales tax must remit by Electronic Funds Transfer (EFT). EFT payments are due on the 20th of the month following the reporting period.
• Weekend/holiday rule: If the 20th falls on a weekend or state holiday, your return is due the next business day.

Colorado and the Streamlined Sales Tax (SST) program

Colorado is not a member of the Streamlined Sales Tax (SST) program.

However, because TaxCloud is a Certified Service Provider of the SST Program, we can save your business time and money on state registration and filing costs in 24 SST-member states — and handle your Colorado filing.

Calculate your potential tax filing savings through the SST program here.

The latest Colorado sales tax changes

We track Colorado’s shifting sales tax landscape so you don’t have to.

Here are the most relevant updates for 2026:

• Colorado ends state sales tax vendor fee: Effective January 1, 2026, Colorado eliminated the state-level sales tax service fee (vendor’s fee). Sellers must now remit 100% of collected state sales tax — the previous 2.22% retention allowance (capped at $1,000 per period) no longer applies. Local service fees from cities, counties, and special districts are unaffected.
• Colorado local sales tax rate changes January 2026: The Colorado Department of Revenue published an extensive list of local rate changes effective January 1, 2026 — including new fire protection and lodging district taxes, rate increases across multiple cities, and the City of Gunnison shifting from self-collected to state-collected administration.