Wyoming Sales Tax must be paid to the County Treasurer within 50 of the date of purchase. After 50 days, additional penalties and interest will be due. If you are calculating tax on a sale that occurred more than 50 days ago, please contact your County Treasurer for the amount of penalties and interest due.

Note: This calculator just provides an estimate of sales tax based on the information provided by the user, and should be used for informational purposes only. The Treasurer's Office is not responsible for any errors in the information or fees provided by this form.

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The taxable sales price is the price of the vehicle less the gross trade-in allowance (if any) and includes: transportation costs, documentation fees, any vehicle additions, any added dealer profit And does not include: extended warranties, rebates assigned to dealer, gap insurance. Cash down payments are NOT subtracted from the taxable sales price.