Is the sales tax on my 2025 used car purchase deductible?

Yes, sometimes. Sales tax paid on a used car purchased in 2025 may be deductible only if you itemize deductions and elect to deduct state and local sales taxes instead of state and local income taxes. The deduction is subject to the $40,000 SALT cap ($20,000 if married filing separately).

1) Basic rule

You may deduct either:

• State and local income taxes, or
• State and local general sales taxes (including sales tax on a vehicle)

You cannot deduct both.

2) Sales tax on a used car qualifies

Sales tax paid on the purchase of a used vehicle is a general sales tax and qualifies for the deduction in the year paid (2025), if you itemize and choose the sales-tax option.

• Applies to cars, trucks, motorcycles, RVs
• Applies whether purchased from a dealer or private party (if sales tax is paid)

3) How the deduction is calculated

If you choose the sales tax option, you may deduct:

• The amount from the IRS Optional Sales Tax Tables, plus
• Actual sales tax paid on major purchases, such as a vehicle

The total SALT deduction (sales tax + property taxes + other state/local taxes) is capped at $40,000 ($20,000 MFS).

4) Itemizing is required

You must itemize deductions on Schedule A (Form 1040) to claim the sales tax deduction.

• If you take the standard deduction, the sales tax is not deductible
• Many taxpayers receive no benefit if the standard deduction is higher

5) Business use is treated differently

If the used car is purchased for business use:

• The business portion of sales tax is generally added to the vehicle’s depreciable basis
• Not deducted as an itemized SALT deduction

6) What is Not deductible

• Registration fees based on value (unless separately deductible as property tax)
• Dealer documentation fees
• Excise taxes not treated as general sales taxes
• Sales tax if you take the standard deduction

Summary

• Sales tax on a 2025 used car may be deductible
• Only if you itemize and choose sales tax instead of income tax
• Subject to the $40,000 SALT cap
• No deduction if you take the standard deduction
• Business vehicles follow different rules

Related Questions

• Can car repairs be claimed as a tax deduction?
• Is photography subject to sales tax in Florida?
• Can trading cards be used as a tax write off?

Source:

IRC §164(a) & §164(b)(5)

IRS Pub 530 – Tax Information for Homeowners (SALT overview):

Schedule A (Form 1040) Instructions

IRC §164(b)(6) (SALT cap)

IRS Pub 17 – Your Federal Income Tax

IRS Pub 334 – Tax Guide for Small Business

IRS Pub 946 – How to Depreciate Property: