Colorado car-buying rules
These are the rules the Before the Lot planner uses for Colorado, with the source and date for each. They describe the rules and the planner's estimate; they are not legal or tax advice, and the dealer's quote and your state's documents are what count.
Dealer doc fee in Colorado
No dollar cap, with rules on how the fee is shown.
No cap. The dealer board rule says advertised prices must include all costs except taxes, finance charges, emissions testing and government fees, so the dealer handling fee belongs in the advertised price (Reg. 44-20-121(3)(i)).
Sales tax in Colorado
- Tax: Sales and use tax.
- State rate used: 2.9%.
- Local add-ons: Up to 9.1% on top of the state rate.
- Dollar cap on the tax: none in the data.
Plus city, county and special-district taxes for your home address (dealer or county clerk collects). Trade-in deducted.
Your local rate
Local tax on a car goes by where the buyer lives. Find your exact rate: Colorado official lookup (Colorado Sales Tax Lookup (GIS address lookup)).
Trade-in tax credit
Yes. Colorado takes the trade-in value off the taxed price.
Does a maker's rebate lower the taxed price?
No. Taxed 'without reduction for the rebate'. Home-rule cities may differ.
Cancellation and return rights
No Colorado-specific right to cancel or return a dealership purchase is in the planner's data.
There is no federal cooling-off period for buying a car at a dealership; the FTC's door-to-door Cooling-Off Rule excludes dealers with a permanent place of business (16 CFR 429.3(a)). The FTC CARS Rule was vacated by the Fifth Circuit in January 2025 and formally withdrawn effective Feb 12, 2026 (91 FR 6507). No other state with a general used-car cooling-off right was found; NCLC calls California's the first in the nation.
Worked out-the-door example: a $35,000 vehicle
Built with the planner's own out-the-door formula: the tax is the state base rate times the vehicle price plus the doc fee, with no trade-in, rounded to the cent. Local taxes are not included.
| Line | Amount |
|---|---|
| Vehicle price (example) | $35,000 |
| Doc fee (the planner's default, an example amount only; there is no cap) | $450 |
| Sales tax at 2.9% on $35,450 | $1,028.05 |
| Title and registration (the planner's default estimate) | $250 |
| Out-the-door total | $36,728.05 |
Title and registration fees differ by state and vehicle; $250 is a placeholder, not a Colorado figure.
Plan a purchase in Colorado
Plan a purchase in Colorado opens the free planner with Colorado already chosen. Nothing is sent to a server; the choice rides in the link's fragment.
These rules feed two steps of the method: set your numbers and let dealers compete. To read a dealer's quote line by line, see reading an out-the-door quote. All states.