CO · BILL-SALE · Updated June 2026 · Free
Colorado Bill of Sale
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Colorado at a glance: Notarization Required: No · Odometer Disclosure: Required · Title Transfer Deadline: 60 days from sale
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Overview
Bills of Sale in Colorado
Colorado requires a bill of sale for motor vehicle private sales to support the title transfer at the Colorado DMV. Colorado charges 2.9% state sales tax plus county and city taxes on vehicle purchases.
The buyer has 60 days to register the vehicle. Colorado requires an emissions test for vehicles in the Denver metro area and certain other counties before registration.
Key Facts
Colorado Bill of Sale — Quick Reference
| Requirement | Colorado Rule |
|---|---|
| Notarization Required | No |
| Odometer Disclosure | Required |
| Title Transfer Deadline | 60 days from sale |
| Sales Tax | 2.9% state + local (varies) |
| Emissions Test | Required in Denver metro and some counties |
| Governing Law | C.R.S. § 42-6-116 |
Legal Requirements
Colorado Legal Requirements
- Seller must sign over the title.
- Bill of sale should include purchase price for tax purposes.
- Odometer disclosure required.
- Buyer registers within 60 days at county motor vehicle office.
- Emissions test required for registration in certain counties.
Governing Laws
Colorado Governing Laws
Read the full text of these laws at Cornell Law School's Colorado legal resources or your state legislature's official website.
Questions & Answers
Colorado Bill of Sale — Frequently Asked Questions
Is an emissions test required for a private car sale in Colorado?
An emissions test is required for registration in the Denver metro area (Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas, Jefferson counties) and some other areas. The test is typically required before the buyer can register.
Does Colorado require a bill of sale?
Yes. A bill of sale is required to document the purchase price for tax purposes and to support the title transfer at the county motor vehicle office.
How much sales tax is on a car in Colorado?
Colorado charges 2.9% state sales tax plus county and city taxes. The total rate varies significantly by location.