How the tax works
Oklahoma has a medical marijuana retail program. A qualified purchase from a licensed medical dispensary carries a 7% medical marijuana tax and the ordinary 4.5% state sales tax, plus any city and county sales tax at the store. When the marijuana tax appears separately, both tax percentages use the pretax product price rather than taxing the 7% charge again. On $100 with only the state sales rate known, the $111.50 result is a minimum, not a checkout quote.
The five city-and-county examples use the Tax Commission's October–December 2026 rates. Oklahoma City in Oklahoma County has an 8.625% full sales rate: a $100 medical purchase totals $115.63 after $7 marijuana tax and $8.63 sales tax. Match both city and county or use the address rate locator, especially when a city crosses county lines. This calculator covers a standard qualified medical purchase; special sales-tax exemptions, such as an eligible fully disabled veteran, are not included here; ask the store to confirm them.
Use a pretax retail price after discounts, excluding separately stated taxes. Tax-inclusive advertised prices must be converted to a pretax price first. Store fees, delivery charges and receipt rounding can change the amount owed; this estimate does not resolve their tax treatment.
Sources and limits
- Oklahoma Tax Commission: medical marijuana tax FAQ
- Oklahoma Tax Commission: state and local sales-tax rules
- Oklahoma Tax Commission: medical marijuana tax base and worked example
- Oklahoma Tax Commission: Q4 2026 city and county rates
- Oklahoma Tax Commission: address rate locator
- Oklahoma Medical Marijuana Authority: dispensary license scope
Rates and eligibility can change. Check the official sources, your transaction type and location before relying on a checkout estimate. This is general information, not tax or legal advice.