Oklahoma Sales Tax Guide: Rate, Rules & Filing

Oklahoma levies a 4.5% state sales and use tax. City and county taxes push combined rates above 11% in some areas; Oklahoma City is about 8.625%. The state sales tax on groceries was eliminated in 2024 (local taxes may still apply to food).

To find the combined rate for a specific address, use our US sales tax calculator.

Oklahoma economic nexus applies once your sales into the state exceed $100,000 in the current or prior calendar year. There is no transaction-count trigger. Physical presence creates nexus immediately.

Oklahoma applies a marketplace-facilitator election threshold of at least $10,000 in aggregate taxable Oklahoma sales during the immediately preceding 12-month period — a separate, lower figure than the $100,000 economic-nexus threshold that applies to a remote seller's own direct sales. Once over that threshold, a facilitator must either register and collect and remit Oklahoma sales tax (if Oklahoma-located) or vendor use tax (if out-of-state), or instead comply with the notice-and-reporting requirements of 68 O.S. § 1393. When a facilitator collects and remits on a seller's behalf, the marketplace seller is not required to separately collect tax on those sales, and an Oklahoma Tax Commission letter ruling states that facilitator-collected platform sales are excluded from the seller's own $100,000 economic-nexus calculation, while sales the facilitator does not collect on remain included.[8]

Oklahoma assigns monthly or semiannual filing based on tax volume. Returns are due the 20th of the month following the reporting period. For the portal, return, and step-by-step, see our guide to filing Oklahoma sales tax online.

Oklahoma eliminated its state sales tax on groceries in 2024, so food is exempt from the state rate (local taxes may still apply). Prescription drugs are exempt. SaaS and electronically delivered software are not subject to Oklahoma sales tax.

Oklahoma sellers buy inventory for resale tax-free using their sales tax permit and document exempt sales under the Oklahoma Tax Commission's vendor rules [4]. Sales tax permits are valid for three years and renew automatically unless revoked [1].

For the official form, multistate certificate rules and expiry, see the Oklahoma resale certificate guide.

Late filing or payment carries a penalty of 10% of the tax due, plus interest from the due date until the balance is paid. Our Oklahoma filing guide lists late filing penalties, interest, and what to do if you missed a return.

You must file a written protest, using Form L-25, within 60 days of a proposed assessment [5]. Miss the 60-day window and the Commission loses jurisdiction, so the assessment becomes final [5].

• [1] Oklahoma Tax Commission — Sales and Use Tax (4.5% state)

• [2] Oklahoma Tax Commission — Letter Ruling LR-25-005 (economic nexus)

• [3] Oklahoma Tax Commission — State Sales Tax on Food (0% state grocery rate)

• [4] Oklahoma Tax Commission — Publication D (vendor exemption duties)

• [5] Oklahoma Tax Commission — Form L-25 (protest, 60 days)

• [6] Oklahoma Tax Commission — Sales Tax Holiday

• [7] Oklahoma Tax Commission — OkTAP (registration, $20 permit)

• [8] Oklahoma Tax Commission — Business Help Center (Marketplace Facilitators) / 68 O.S. § 1393

Verified July 2026 against Oklahoma Tax Commission published guidance.

• Does Oklahoma Have Sales Tax on Clothing? A Guide for Businesses
• What is Exempt from Sales Tax in Oklahoma: A Guide for Businesses