Colorado Sales Tax Guide (2026): Rates, Nexus, Registration & Filing

Is SaaS taxable?

Not at state level (many home-rule cities tax it).

What is the sales tax rate in Colorado?

Colorado’s state sales tax rate is just 2.9% — one of the lowest in the country — but counties, cities, and special districts add their own taxes, pushing combined rates up to around 11% in places like Aspen. Retail marijuana carries a separate 15% rate.

Colorado is heavily home-rule: over 70 cities self-collect their own tax (Denver, Boulder, Colorado Springs, Aurora, and others). State-collected jurisdictions file through the state’s Sales & Use Tax System (SUTS), which also lets you file for many participating home-rule cities in one place — though a few, such as Denver, require separate registration and filing. Confirm the exact rate by address before invoicing.

Do you have sales tax nexus in Colorado?

Nexus is the connection that obligates your business to collect and remit Colorado sales tax. You can establish it two ways — physically or economically. Either one is enough.

Physical nexus

You have physical nexus if you have a tangible presence in Colorado, such as:

• An office, warehouse, salesroom, or other place of business in Colorado
• Employees or independent contractors in the state
• Inventory stored in Colorado (including 3PL or Amazon-FBA stock)
• Leasing tangible personal property used in Colorado
• Regularly delivering goods into Colorado in your own or a contract carrier’s vehicles

Economic nexus

Out-of-state sellers establish economic nexus once gross sales into Colorado exceed $100,000 in the current or previous calendar year. There is no transaction-count threshold. You generally have until the first day of the first month beginning at least 90 days after crossing the threshold to register and start collecting.

Marketplace facilitators collect and remit on the sales they facilitate. Note that most home-rule cities apply their own nexus and registration rules — having state nexus often means you owe tax in home-rule cities too, so check each city where you sell.

What is taxable in Colorado?

Tangible personal property is generally taxable; exemptions include certain medical items and devices. Services are usually not taxable at the state level unless they create a product. Importantly, Colorado taxes digital goods such as downloaded music, video, and e-books as tangible personal property — even though it exempts SaaS at the state level.

Separately stated, optional delivery charges are generally exempt from state tax; bundled shipping is taxable. Colorado also charges a Retail Delivery Fee (about $0.29 per delivery, adjusted annually) on each retail delivery by motor vehicle that includes at least one taxable item — retailers with $500,000 or less in prior-year retail sales are exempt.

Is SaaS taxable in Colorado?

Not at the state level — Colorado does not tax SaaS as a state matter. However, many home-rule cities do tax SaaS (Denver, for example, taxes software access at its city rate and files separately from the state). If you sell SaaS into Colorado cities, check each home-rule jurisdiction.

How is food taxed in Colorado?

Food for home consumption (and food sold in vending machines) is exempt at the state level; prepared food is taxable. Be aware that some home-rule cities tax groceries even though the state does not.

How to register for a Colorado sales tax permit

In-state sellers apply for a Colorado Sales Tax License; out-of-state sellers apply for a Retailer’s Use Tax License. Taxually can register for you, or you can apply through Revenue Online (or by mailing form CR 0100). Register with the state first, then add SUTS.

You’ll need personal and business identification, your entity type, and a list of the products you sell. An in-state license costs $16 (plus a refundable $50 deposit) and renews every two years; the out-of-state Retailer’s Use Tax License is free.

How to collect sales tax in Colorado

Colorado is destination-based — collect based on where the buyer receives the goods. For state-collected jurisdictions, remit through SUTS or Revenue Online. For self-collecting home-rule cities not on SUTS (such as Denver), you must register and file directly with the city.

Filing and paying Colorado sales tax

Filing frequency depends on volume: monthly at $300+ per month, quarterly under $300 per month, and annually at $15 or less per month. Returns are due on the 20th of the month following the period (next business day if that’s a weekend or holiday); businesses paying more than $75,000 per year in state tax must pay by EFT.

File online through Revenue Online or SUTS, or by mail using form DR 0100. Note: effective January 1, 2026, Colorado eliminated the state vendor (service-fee) allowance, so you now remit 100% of the state tax you collect — though some local jurisdictions still allow a local service fee. Taxually’s software automates the full process.

Penalties for late or non-compliant filing

Failing to file or pay on time triggers these penalties:

• A penalty of $15 or 10% of the tax due, whichever is greater, plus 0.5% for each month the tax remains unpaid (up to a maximum of 18%).
• Interest accrues on unpaid tax at the statutory rate.