Colorado Sales Tax Calculator (2026) — Add or Reverse Tax
Colorado's combined sales tax rate is 7.89% (2.90% state + 4.99% average local). Use the calculator below to add Colorado sales tax to a price, or reverse a tax-included total to find the pre-tax price and exact tax amount.
How to use this calculator:
- Adding tax — enter a pre-tax price, pick "Add tax to price," and the calculator applies the Colorado rate to show the tax amount and final total.
- Reversing (extracting) tax — enter a total that already includes tax, pick "Extract tax from total," and the calculator divides by 1 + the rate to isolate the pre-tax price and the exact tax paid.
- Pick the rate that matches your situation: the average combined rate is a good statewide estimate, but the state-only or maximum-local rate is more precise if you know the exact city or county.
Understanding Colorado Sales Tax
Colorado's state sales tax rate is 2.90%, and local jurisdictions add an average of 4.99% on top, bringing the typical combined rate to 7.89%. Rates vary by city and county — the highest combined rate in Colorado can reach 12.00%.
Colorado has one of the lowest state sales tax rates (2.9%) but among the highest average local add-ons, giving it a wide range of combined rates by city.
Colorado also levies a state income tax, which shapes how much the state relies on sales tax revenue relative to other funding sources.
Groceries
Exempt from Colorado state sales tax.
Largest city
Denver
State income tax
Yes
Why Reverse Sales Tax Calculation Matters
Receipts, invoices, and marketplace payouts usually show only the tax-included total — not the pre-tax price. Reversing the calculation matters for bookkeeping (separating revenue from tax collected), expense reports (reimbursing only the pre-tax cost), and price comparisons (checking what an item actually costs before Colorado's tax is applied). Because dividing by (1 + rate) is not the same as simply subtracting the rate from the total, doing this by hand is a common source of errors — the calculator above handles it exactly.
Colorado Taxability at a Glance
🛒 Groceries
Exempt
👕 Clothing
Taxable
💊 Prescription drugs
Exempt
History & Rate Breakdown
Colorado's 2.9% state sales tax rate is one of the lowest in the country, a legacy of the state's strong home-rule tradition: roughly 70 Colorado cities — including Denver, Aurora, and Colorado Springs — operate as home-rule jurisdictions that administer and collect their own local sales tax entirely independently of the state.
Colorado's combined rate is overwhelmingly a local story: the 2.9% state rate is layered with county, city, and special-district taxes that average 4.99% and can push the total above 11% in places like Aspen. Because home-rule cities self-collect, a business with customers across multiple Colorado cities may need to file separate returns with each home-rule city in addition to the state.
Where the Money Goes
Colorado's low state sales tax rate means income tax carries more of the state budget, while local sales tax — heavily self-collected by home-rule cities — mostly funds municipal services directly.
Business Use Case: Registering & Collecting Colorado Sales Tax
A retailer crossing Colorado's $100,000 economic nexus threshold must register with the Colorado Department of Revenue for state-collected jurisdictions, but if its buyers are concentrated in a home-rule city like Denver, it may also need to register and file separately with that city's own tax office — Colorado's Sales and Use Tax System (SUTS) portal was built to simplify this multi-jurisdiction filing burden.
Sales Tax Terms Glossary
Combined rate
The state sales tax rate plus any applicable local (city, county, or special district) rates — the actual rate charged at checkout in a given location.
Reverse sales tax
The process of working backward from a tax-included total to find the pre-tax price and the exact tax amount, using total ÷ (1 + rate) = pre-tax price.
Economic nexus
A sales threshold (in dollars, transaction count, or both) that obligates an out-of-state seller to collect and remit sales tax even without a physical presence in the state.
Marketplace facilitator
A platform (e.g. Amazon, Etsy, eBay) that collects and remits sales tax on behalf of third-party sellers under most states’ marketplace facilitator laws.
Real-World Example
A $500.00 purchase in Colorado at the average combined rate of 7.89%:
- Tax amount: $500.00 × 7.89% = $39.45
- Total price: $500.00 + $39.45 = $539.45
Colorado Sales Tax Compliance for Sellers
Remote and online sellers establish economic nexus in Colorado once they exceed $100,000.00 in annual sales (no separate transaction-count test). Once nexus is established, a seller must register with the state, collect Colorado sales tax at checkout, and file returns on the state's required schedule. Marketplace facilitators (Amazon, Etsy, eBay, Walmart) generally collect and remit on behalf of third-party sellers automatically.
Frequently Asked Questions — Colorado Sales Tax
What is the sales tax rate in Colorado?▾
Does Colorado tax groceries?▾
Does Colorado have a state income tax?▾
When do online sellers need to collect Colorado sales tax?▾
How do I calculate Colorado sales tax on a purchase?▾
How do I reverse Colorado sales tax to find the price before tax?▾
What is the formula to back out sales tax from a receipt in Colorado?▾
References & Sources
Rates last verified January 2026. Colorado sales tax rates and thresholds can change — always confirm current figures with the Colorado Department of Revenue before filing or invoicing. This tool is for estimation and educational purposes only and is not tax, legal, or accounting advice.
Jordan Hayes
Verified AuthorLead Content Editor & Personal Finance Specialist
Jordan Hayes is a personal finance content strategist with 9+ years building educational finance and health resources. He has written and fact-checked over 200 personal finance guides covering mortgage amortization, retirement planning, tax strategy, and budgeting. His work applies IRS publications, Federal Reserve data, and peer-reviewed research to make complex calculations accessible.