What is the colorado sales tax calculator?
In short
Colorado's state base sales-tax rate is 2.9%, and its average combined rate is 7.81% once local taxes are counted. A $100 purchase carries $2.90 in state tax ($102.90 total). Colorado is a home-rule state — 70+ home-rule cities set and collect their own rates independently — combined rates range widely and exceed 11% in some districts. That means the rate in Denver is set largely by the city itself, not the 2.9% state rate alone.
This calculator applies Colorado's 2.9% state base rate to any price and shows the tax and total instantly. Because Denver and other localities can differ, it also lets you enter your exact combined rate. Colorado is a home-rule state: 70-plus home-rule cities set, administer and collect their own sales tax — including their own taxable-item definitions — a major compliance complexity.
How to use this calculator
- 1Put the pre-tax amount of your purchase in the price field.
- 2Colorado is pre-selected at its 2.9% state base rate.
- 3Swap in your local combined rate if you're buying in Denver (9.15%) or another taxing district.
- 4Your sales tax and out-the-door total update live; use reverse mode to work backwards from a total.
The formula
- pre-tax price
- — The shelf/sticker price, pre-tax
- rate
- — Colorado base 2.9%; combined avg 7.81%
- sales tax
- — The tax portion of your total
- total
- — Pre-tax price plus sales tax
Worked example
The scenario
A $500 purchase in Denver, Colorado, where the combined rate is 9.15%.
The result
At the 2.9% state base rate the state tax is $14.50 ($514.50 total); at Denver's 9.15% combined rate you'd pay more once local tax is added.
Common use cases
- Estimating the out-the-door cost of a Colorado purchase before you buy
- Comparing tax on a big-ticket item between Denver (9.15%) and a lower-rate locality
- Seeing why your receipt differs from the 2.9% headline — it has the lowest non-zero state rate in the nation at 2.90%, yet one of the five highest average local rates at about 4.99%, so local taxes dominate the burden.
- groceries are exempt from the state tax, but home-rule cities may tax food, so the grocery exemption is not uniform
Limitations & assumptions
- This tool uses the Colorado state base rate (2.9%); combined local rates vary — 70+ home-rule cities set and collect their own rates independently — combined rates range widely and exceed 11% in some districts.
- Food for home consumption is exempt from the 2.9% state tax, but many home-rule cities tax groceries at their own rate, so the exemption is not uniform statewide.
- Rates change: Denver's combined rate rose to 9.15% (from 8.81%) effective Jan 1, 2025; separately the state's per-delivery Retail Delivery Fee fell to $0.28 for FY 2025–26. Confirm with the Colorado Department of Revenue — Taxation Division before filing.
- Treat the result as a planning estimate rather than tax advice.
Frequently asked questions
What is the sales-tax rate in Colorado?
Why is the Colorado rate different in every city?
Are groceries taxed in Colorado?
How much is sales tax on a $100 purchase in Colorado?
Has the Colorado sales-tax rate changed recently?
Disclaimer: KalkWise calculators are provided for general informational and educational purposes only and do not constitute financial, investment, tax, or legal advice. Results are estimates based on the figures you enter and the assumptions described above. Actual outcomes will vary. Consult a qualified professional before making financial decisions.