The Yuma County sales tax, which Arizona formally calls the Transaction Privilege Tax (TPT), runs from about 8.4% in the City of Yuma to about 10.7% in San Luis on most retail purchases. That total stacks three layers: the state’s 5.6% rate, a Yuma County rate of roughly 1.1%, and whatever the individual city or town adds on top.1City of Yuma, AZ. Sales Tax Information2Arizona Department of Revenue. San Luis Transaction Privilege Tax Rates The tax technically falls on the business for the privilege of operating in Arizona, not on the buyer, but almost every business passes it through at the register, so the number on your receipt is what matters day to day.3Arizona Department of Revenue. Transaction Privilege Tax
What You Pay by City
The state portion is fixed at 5.6% everywhere in Arizona, and the Yuma County excise adds about 1.1% on top of that. The city layer is where the spread opens up.
- City of Yuma adds 1.7%, for a combined rate of about 8.4% on general retail purchases.
- San Luis adds 4.0%, pushing the combined rate to about 10.7%.2Arizona Department of Revenue. San Luis Transaction Privilege Tax Rates
The rate assigned to a sale is based on the seller’s physical location, not where the buyer lives. The same item bought a few miles apart within the county can carry noticeably different tax.
What’s Taxed and What Isn’t
Most tangible goods sold at retail are taxable. A handful of everyday categories are carved out, and a few catch people off guard because they look exempt but aren’t.
Groceries. Food purchased for home consumption from a qualifying grocery retailer is exempt from the 5.6% state TPT.4Arizona Legislature. Arizona Revised Statutes 42-5102 – Tax Exemption for Sales of Food; Nonexempt Sales Some cities still tax groceries at the city level. San Luis, for example, charges its full 4.0% city rate on food for home consumption.2Arizona Department of Revenue. San Luis Transaction Privilege Tax Rates
Prescriptions and medical items. Medications prescribed by a licensed medical, dental, or veterinary professional are exempt, as are medical oxygen and its delivery equipment, insulin and insulin syringes, glucose test strips, prescription eyeglasses and contact lenses, hearing aids, and qualifying durable medical equipment.5Arizona Legislature. Arizona Revised Statutes 42-5061 – Retail Classification; Definitions
Over-the-counter products are not exempt. Vitamins, non-prescription medicines, dietary supplements, and weight-loss products remain fully taxable.
Restaurants and lodging. Prepared food and drink served at a restaurant or bar is its own taxable classification, so a restaurant meal is taxed in full even where grocery food is exempt. Hotels, motels, and short-term rentals are taxed as transient lodging when the stay is fewer than 30 consecutive days; a stay of 30 days or more is not subject to transient lodging tax from the first day.6Arizona Legislature. Arizona Revised Statutes 42-5070 – Transient Lodging Classification; Definition
Professional services. Legal advice, accounting, consulting, and similar services that don’t involve selling a physical product generally aren’t subject to TPT, because Arizona taxes specific business classifications rather than services broadly.
If You Run a Business in Yuma County
Any business conducting taxable activity in the county needs a TPT license before it starts operating. You apply through AZTaxes.gov using the Arizona Joint Tax Application (Form JT-1).7Arizona Department of Revenue. Arizona Joint Tax Application JT-1/UC-001 The state fee is $12 per location.8Arizona Department of Revenue. TPT License
Get the physical address exactly right. The Department of Revenue uses the business location to assign the applicable rate, and a wrong or ambiguous address can leave you collecting at the wrong rate without realizing it.
How often you file depends on your estimated annual combined TPT liability across state, county, and city:9Arizona Department of Revenue. TPT Filing Frequency
- Annual filing: less than $2,000 in estimated annual liability.
- Quarterly filing: $2,000 to $8,000.
- Monthly filing: more than $8,000.
- Seasonal filing: businesses active eight months or fewer per year.
Every return has a statutory due date of the 20th of the month following the reporting period. Electronic filers are treated as timely if the return and payment are in by the last business day of that month, and paper filers get until the second-to-last business day.10Arizona Department of Revenue. Due Dates9Arizona Department of Revenue. TPT Filing Frequency If you miss the grace window entirely, penalties and interest are calculated back to the 20th, not from the end of the grace period.
Penalties for Filing Late
The late-filing penalty is 4.5% of the tax owed for each month or partial month a return is overdue, up to a maximum of 25% of the tax due or $100, whichever is greater. Businesses required to file electronically that fail to do so face an additional 5% penalty on the tax owed. Ignoring a notice and demand from the Department adds another 25% penalty on top of the standard late-filing charge, with reasonable cause as the only defense.11Arizona Legislature. Arizona Revised Statutes 42-1125 – Civil Penalties; Definition
Interest accrues on any unpaid balance. The annual underpayment interest rate is 6% as of mid-2026, and it’s adjusted quarterly, so the figure can move.12Arizona Department of Revenue. Interest Rates
Selling into Yuma County from Out of State
Out-of-state sellers must register and collect TPT once they cross Arizona’s economic nexus threshold of $100,000 in gross sales to Arizona customers in the current or previous calendar year.13Arizona Department of Revenue. Economic Threshold The same $100,000 threshold applies to marketplace facilitators such as Amazon, eBay, and Etsy. When a marketplace facilitator collects TPT on a transaction, the individual seller does not need to collect it again on that sale.14Arizona Department of Revenue. Out-of-State Sellers Remote sellers and facilitators below the threshold are supposed to notify Arizona customers that no tax was collected and that the customer may owe use tax.
Use Tax on Untaxed Purchases
When you buy something from an out-of-state seller that doesn’t collect Arizona TPT, you owe use tax at the same combined rate you would have paid locally, as long as the item is used, stored, or consumed in Arizona.15Arizona Department of Revenue. Use Tax Examples Marketplace facilitator laws have shrunk the number of untaxed online purchases sharply, but buys from small out-of-state sellers, private out-of-state transactions, and items brought back from trips can still trigger a use tax obligation. Individuals report use tax on their Arizona income tax return.
If You Should Have Been Collecting but Weren’t
Businesses that discover they should have been collecting and remitting TPT, often after realizing they crossed the economic nexus threshold, can use Arizona’s Voluntary Disclosure and Compliance Program to settle on better terms than if the Department finds them first.16Arizona Department of Revenue. Voluntary Disclosure and Compliance Program The standard look-back is limited to four years from the application date, and penalties are fully abated once all tax and interest are paid on time. You still owe every dollar of back tax plus interest. You’re ineligible if the Department has already contacted you about that tax type, and each business can only use the program once per tax type.