Free Colorado Vehicle Bill of Sale

Colorado Vehicle Bill of Sale — What You Need to Know

Sales Tax Details

Colorado state sales tax is 2.9%, but counties, cities, and special districts add their own rates. Effective combined rates range from about 4% in rural counties to 8.81% in Denver and over 10% in some metro pockets. The county clerk calculates tax based on your residence address, not the seller's. Annual Specific Ownership Tax (SOT) — Colorado's ad valorem vehicle tax — is also collected at registration and decreases each year as the vehicle ages.

Exemption: Transfers between spouses, parents, children, and siblings are exempt from sales tax with a completed DR2407 affidavit and proof of relationship. Gifts between qualifying family members and inheritance transfers also qualify. SOT is still owed regardless of exemption status.

Inspection Requirements

Colorado has no statewide safety inspection. However, emissions testing is required in nine Front Range counties — Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas, Jefferson, and the urbanized portions of Larimer and Weld. Gasoline vehicles 7 years and older need testing every two years; diesels follow a separate schedule. A VIN verification (DR2698) is required for vehicles titled out of state.

Registration

Registration for this vehicle type is handled by County Clerk and Recorder — not the same agency that handles cars in Colorado. Plan for separate filings.

Colorado Vehicle Sale — Step-by-Step Checklist

1. Complete Colorado Bill of Sale (form DR2173) with VIN, year, make, model, sale price, and date
2. Seller signs the Colorado title over to buyer with odometer disclosure (required for vehicles under 20 years old)
3. Buyer completes Application for Title and/or Registration (form DR2407)
4. Verify VIN — DR2698 verification required for out-of-state vehicles, performed by law enforcement, dealer, or emissions station
5. If located in one of the nine emissions counties, complete emissions test before registration
6. Provide proof of Colorado auto insurance meeting state minimums
7. Bring secure and verifiable ID (Colorado driver's license or other accepted document)
8. Buyer visits county clerk and recorder's office within 60 days of purchase
9. Pay 2.9% state sales tax plus local add-ons, Specific Ownership Tax, title fee, and registration
10. Both parties keep signed copies of DR2173 for tax and insurance records

Common Pitfalls

• Assuming Colorado's tax is just 2.9% — local rates push the effective combined rate to 7-9% in most populated areas, with Denver near 8.81%
• Missing the 60-day transfer deadline — penalties begin accruing and registration becomes more expensive the longer you wait
• Forgetting the annual Specific Ownership Tax (SOT) — it is calculated on the vehicle's taxable value and surprises buyers expecting only a flat registration fee
• Skipping emissions testing when you live in one of the nine Front Range counties — you cannot register without it
• Not getting a VIN verification (DR2698) for out-of-state vehicles — required before the county clerk will issue a Colorado title
• Forgetting that Colorado titling happens at the county clerk and recorder's office, not a state DMV — you cannot title at a driver's license office
• Family transfers losing the sales tax exemption because the DR2407 wasn't completed properly with relationship documentation
• Buyers from non-emissions counties who later move to a Front Range county and discover their vehicle won't pass the next test

Pro Tip

Colorado's 60-day window gives you breathing room, but the combination of state and local sales tax, Specific Ownership Tax, and Front Range emissions testing makes Colorado one of the more administratively involved states for vehicle transfers. Use form DR2173 for the bill of sale, file DR2407 at your county clerk and recorder, and do the math on your local combined rate before you sign.

Colorado Vehicle Bill of Sale — FAQs