The Oklahoma (OK) state sales tax rate is currently 4.5%, ranking 36th-highest in the U.S. Depending on local municipalities, the total tax rate can be as high as 11.5%. The average local rate is 4.43%. The average combined tax rate is 8.93%, ranking 6th in the US.

Oklahoma state use tax must be paid on tangible personal property purchased and brought into this state for storage, use or consumption.

In some of the cities, local taxes apply to both intra-state and inter-state transactions.

In Oklahoma, food is taxable, but prescription drugs for human consumption are exempt from sales tax.

Oklahoma has annual Back to School Sales Tax Holiday (Aug 3-5, 2018). During the holiday, clothing and shoe purchases under $100 per item are free of tax.

Oklahoma participates in the Streamlined Sales Tax Project (SSTP).