Adams County, CO Car Tax & Registration (2026)
In Adams County (Brighton), a car purchase is taxed at about 8.9% combined — Colorado's 2.9% state tax plus local tax set by your home address. Every year you also pay the value-based Specific Ownership Tax (statewide, decays with the car's age). Part of Adams County falls in the emissions program area, so testing is required only at certain addresses.
Verified July 2026 from official sources. How we verify fees.
What you'll pay in Adams County
- Combined sales tax: ~8.9% (state 2.9% + local, by address)
- Specific Ownership Tax: value-based, annual (statewide formula)
- Emissions test: required at some addresses
- Title: $7.20 · Registration: weight-based (statewide)
How the tax works
Colorado charges vehicle sales tax at your home address, so a Denver-metro address adds RTD (1%) and cultural-district taxes that a rural one won't — the ~8.9% shown is typical around Brighton. The Specific Ownership Tax is where most of your annual cost goes on a newer car; it's based on 85% of MSRP and drops each year. Estimate it on our Colorado registration page.
Frequently asked questions
What is the car sales tax in Adams County, CO?
About 8.9% combined around Brighton — Colorado's 2.9% plus local tax. Colorado charges it by your home address, so special districts can push your exact rate higher or lower.
Does Adams County require an emissions test?
Part of Adams County falls in the emissions program area, so testing is required only at certain addresses.
How much is the Specific Ownership Tax in Adams County?
It's a statewide formula, not a county rate — based on 85% of your car's original MSRP, starting at 2.1% in year one and decaying to a flat $3 after ten years. Adams County collects it at registration.