Car sales tax in Aurora, Colorado
Buying a car in Aurora, Colorado (Arapahoe County), the combined state and local sales tax rate is 8%. On a $35,000 car that's about $2,836 in tax; with a $10,000 trade-in, about $2,036.
These are the figures the Before the Lot planner and its AI connector use for Aurora, with their sources. They describe the rates and the arithmetic; they are not tax advice, and the dealer's quote and the state's documents are what count.
How the rate is made up
Aurora, Arapahoe County: 8% combined state and local rate (Colorado's rate file, rates as of 2026-07-01). That rate includes Regional Transportation District (RTD) 1%, Scientific and Cultural Facilities District 0.1%. Parts of Arapahoe County are in special districts with their own rate.
Parts of Aurora are in other counties: Adams County 8.5%; Douglas County 8.75%.
Out-the-door examples in Aurora
Worked with the planner's own out-the-door math for a new car, the same numbers the connector gives an AI assistant.
| Line | $35,000 car, $10,000 trade-in | $50,000 car, no trade-in |
|---|---|---|
| Vehicle price | $35,000 | $50,000 |
| Doc fee (see below) | $450 | $450 |
| Sales tax at 8% | $2,836 | $4,036 |
| Title and registration (a placeholder) | $250 | $250 |
| Out the door, as dealers quote it | $38,536 | $54,736 |
| Tax saved by the trade-in credit | $800 | — |
| Out the door after the trade-in credit | $37,736 | — |
The trade-in's value itself comes off what's financed or paid, not shown here. Title and registration differ by vehicle; $250 is the planner's placeholder, not a Colorado figure.
Doc fee and trade-in in Colorado
- Colorado sets no cap on the dealer's doc fee; the examples use a typical $450.
- A trade-in lowers the taxed price in Colorado: tax is on the price less the trade-in.
- A maker's rebate doesn't lower the taxed price.
Every rule for the state, with sources: Colorado car-buying rules.
Other places in Colorado
- Denver: 9.15%
- Colorado Springs: 8.2%
- Fort Collins: 8.3%
- Lakewood: 7.5%
- Thornton: 8.5%
- Arvada: 7.96%
Work out your own deal
Open the planner with Aurora filled in
Change the price, trade-in and fees to your own. Nothing is sent to a server; the numbers ride in the link. In Claude or ChatGPT, add the connector and ask about Aurora by name.
Questions
What is the car sales tax rate in Aurora, Colorado?
Buying a car in Aurora, Colorado (Arapahoe County), the combined state and local sales tax rate is 8%. On a $35,000 car that's about $2,836 in tax; with a $10,000 trade-in, about $2,036.
What's the out-the-door price of a $50,000 car in Aurora?
About $54,736: the $50,000 price, a $450 doc fee, $4,036 in sales tax and a $250 placeholder for title and registration. A dealer's itemized quote is what counts.
Does a trade-in lower the sales tax in Aurora?
Yes. Colorado taxes the price less the trade-in, so a $10,000 trade-in on a $35,000 car lowers the tax by about $800.
Is the Aurora rate charged on the dealer's address or mine?
Colorado's local tax on a car goes by where the buyer lives (the address the car is registered to). Colorado's own lookup by address: https://salestaxlookup.colorado.gov/