Texas Tax Code - TAX § 202.052. Rate of Tax

(a) The tax imposed by this chapter is at the rate of 4.6 percent of the market value of oil produced in this state or 4.6 cents for each barrel of 42 standard gallons of oil produced in this state, whichever rate results in the greater amount of tax.

(b) For oil produced in this state from a new or expanded enhanced recovery project that qualifies under Section 202.054 of this code, the rate of the tax imposed by this chapter is 2.3 percent of the market value of the oil.

(c) The exemptions described by Sections 202.056, 202.059, and 202.060 apply to oil produced in this state from a well that qualifies under Section 202.056, 202.059, or 202.060, subject to the certifications and approvals required by those sections.