Texas Tax Code - TAX § 160.021. Retail Sales Tax

(a) A tax is imposed on every retail sale of a taxable boat or motor sold in this state.  The tax is an obligation of and shall be paid by the purchaser of the taxable boat or motor.  If the purchaser pays the tax to the seller, the tax is an obligation of and shall be paid by the seller.

(b) The tax rate is 6 1/4 percent of the total consideration.