ENID, OK - The Oklahoma Sales Tax Holiday is August 7-9 for 2026. The holiday begins at 12:01 am on Friday, August 7 and ends at twelve midnight on Sunday, August 9. The Oklahoma Legislature passed Senate Bill 861 during the 2007 Legislative Session to benefit both consumers and retailers in the state by providing sales tax exempt shopping. Be careful not to overspend just because the tax free weekend is going on in your area. The regular sales tax rate in Oklahoma is 4.5%, so that’s how much money you’d be saving – along with your local sales tax, if applicable.