What is New Mexico's car sales tax rate?

New Mexico charges a 4 percent motor vehicle excise tax on vehicle purchases, levied instead of the general gross receipts tax. The 4 percent applies to the net purchase price after any trade-in credit.

Does a trade-in reduce my car tax in New Mexico?

Yes. New Mexico subtracts the value of a vehicle you trade in from the taxable price, so you only pay the 4 percent excise on the difference. A larger trade-in directly lowers your tax.

Is the motor vehicle excise the same as sales tax?

No. New Mexico exempts vehicle purchases from the general gross receipts tax and instead applies a dedicated 4 percent motor vehicle excise tax. The rate is fixed statewide and does not vary by county.

Do dealer fees get taxed?

The 4 percent excise generally applies to the vehicle price. Documentary and dealer fees may be added to your total cost but are handled separately. This tool lets you add dealer fees to your out-the-door total without taxing them.

Is this the exact amount I will pay?

It is a close estimate. The 4 percent excise is statewide, but title, plate, and registration fees are added at the MVD. Private-party sales also use a 4 percent excise based on price or NADA value, whichever the MVD applies.

New Mexico Car Sales Tax Calculator

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Unlike most states, New Mexico does not charge general sales tax on cars — it applies a dedicated 4 percent motor vehicle excise tax. This calculator computes that excise on your net purchase price after trade-in, then adds dealer fees for an out-the-door estimate.

How it works

The excise is applied to price minus trade-in, then fees are added:

taxable price = purchase price − trade-in value
excise tax    = taxable price × 4%
out-the-door  = purchase price + excise tax + dealer fees

The 4 percent rate is uniform statewide, so unlike sales-tax states there is no county or city add-on to the vehicle excise itself.

Example and notes

Buying a 30,000 dollar car with a 6,000 dollar trade-in means the taxable amount is 24,000 dollars, and the 4 percent excise is 960 dollars. Add a typical dealer documentation fee and MVD title, plate, and registration charges to reach your out-the-door cost. Private-party purchases also pay 4 percent, calculated by the MVD on the stated price or a standard value guide, whichever applies.