Card processing rules for Phoenix merchants

Arizona taxes the seller, not the sale — and Phoenix runs its own rate and its own threshold

Arizona does not have a general sales tax in the way most states do. It has a transaction privilege tax, or TPT, which the Arizona Department of Revenue describes as a tax on the privilege of conducting business in Arizona, legally imposed on the vendor rather than the customer. Almost every seller passes the cost on as a line-item charge that looks exactly like sales tax at the register, so the distinction rarely matters day to day — but it does matter for exemption certificates, audit posture and how a Phoenix business should read its own TPT return, which is filed differently from a standard sales tax return in most other states.

On top of the state TPT rate, the City of Phoenix sets its own city privilege tax rate, currently 2.3% according to the Arizona Department of Revenue's published rate table, stacked with Maricopa County's 0.7% and the state's 5.6% rate to reach the combined 8.6% the City of Phoenix's own finance department lists as the current combined rate for retail sales as of 1 January 2026. That is a genuine city-level rate, not a state pass-through — Phoenix sets it, and it can change independently of Maricopa County or Arizona as a whole.

The threshold most quotes never mention

Phoenix also runs a rule almost no other city in our coverage has: a reduced combined rate on the portion of a single retail item's price above a periodically adjusted threshold. For 2026 and 2027 the Arizona Department of Revenue lists that threshold at $14,338 per item, up from $13,886 in the prior period. Below the threshold, the full 8.6% combined rate applies; on the amount above it, the combined rate drops to 8.3%. This "big-ticket item" tax only applies to a single item of tangible personal property, not to a whole invoice, so it matters for vehicle dealers, boat and RV sellers, furniture retailers and equipment dealers selling individually priced big items, and it is a detail a generic sales tax calculator built for other states will get wrong every time.

How it plays out for Phoenix restaurants and shops

For a Phoenix restaurant, the per-item threshold almost never applies, since restaurant tickets rarely price a single item above $14,338. The operative issue is the same one every restaurant faces nationally: tip handling and whether a fee program calculates at authorization or settlement. Our restaurant payment processing hub covers that mechanic.

For Phoenix retail selling individually priced big-ticket items — vehicles, boats, furniture, equipment — the tiered rate is a real factor in how tax is calculated per transaction, and getting it wrong either overcharges customers or under-remits to the state. Our retail payment processing hub sets out how to read your effective processing rate off a real statement once tax is accounted for correctly.