Does the billing address or the shipping address decide the California sales tax rate?

Two layers: a uniform base rate and a destination-based district rate

California's combined sales and use tax rate is not one number sourced one way. It is two layers, and each layer answers to a different question.

The base statewide rate, 7.25 percent, applies uniformly throughout California before any district tax. Part of it is the local share imposed under the Bradley-Burns Uniform Local Sales and Use Tax Law, and Regulation 1802 decides which city or county receives that share: for allocation purposes, a retail sale occurs at the retailer's California place of business that participates in the sale, not at the customer's location. That allocation rule moves revenue between local governments; it does not change what the customer pays, so the base layer is the same wherever inside California the goods are delivered. The district tax has its own place-of-sale rule, Regulation 1822, under which passage of title is immaterial and a retailer with a single California location makes its sales at that location; the district sales tax applies to a sale only when that place of sale is in the district and the property is delivered there (Regulation 1823), and a shipment to a different district is instead a potential district use tax transaction under Regulation 1827.

The district tax, the additional increment that cities, counties, and special districts add on top of the 7.25 percent floor after a local vote, is where destination controls. Once a retailer is treated as engaged in business in a given district, it must collect the district's use tax on property shipped or delivered into that district, calculated on the delivery address, regardless of where the retailer's office sits or where the invoice was billed. CDTFA's own guidance on district taxes and sales delivered in California states the principle directly: the combined statewide-plus-district rate generally applies to sales delivered or shipped into a district that imposes one, and delivery location, not the seller's location, is what triggers it.

Put the two layers together and the picture is a retailer in one California county collecting the full combined rate, base plus its home district's add-on, on a sale to a customer in that same district, while collecting only the 7.25 percent base rate, no district add-on, on a sale shipped to a customer in a county with no district tax of its own, and potentially collecting a different district's add-on entirely when the delivery goes somewhere the retailer is independently required to collect. The base rate is the same wherever the goods land inside California, with its local share allocated to where the retailer sells from. The district rate answers to where the goods land. Neither one answers to how the invoice was addressed.

Why the billing address does not appear in this analysis at all

Search a tax engine's rate table for a "billing address" field and the honest answer is that California's own regulations never ask for one. The operative concept throughout Regulation 1822, Regulation 1827, and CDTFA's own published guidance is delivery, expressed as "shipped or delivered," "point of delivery," or "destination." A billing address is a financial-system artifact: it identifies where a card is registered or where an invoice is mailed for payment purposes, and it can differ from both the retailer's selling location and the customer's shipping address without changing either sourcing question. One exception is on the way and should not be confused with this rule: beginning January 1, 2027, Senate Bill 122 sources sales of digital products transferred electronically or accessed remotely through a hierarchy of the purchaser's known addresses that begins with the billing address (Rev. and Tax. Code section 6010.5, subd. (b)(3)), a separate rule for products that never ship, covered in this library's article on SB 122. For goods that ship, delivery remains the test.

The practical failure mode shows up most often in two places. The first is a retailer that ships tangible personal property to a customer's job site, warehouse, or a different office than the one on the account, while its accounting system defaults the tax calculation to the billing address because that is the field the system reads first. If the billing address sits inside a district and the shipping address does not, the rate charged is wrong, and a periodic reconciliation against delivery records will eventually surface it. The second is a marketplace or drop-ship arrangement where the retailer's own records never capture a separate ship-to field at all, collapsing billing and shipping into one address of convenience. Neither scenario is a close call under the regulations; both are a data-mapping problem dressed up as a tax question, and the fix belongs upstream of any rate table, in how the system prioritizes the delivery field.

Who has to collect a given district's tax

Sourcing the district tax to the delivery address answers where the tax is due. It does not by itself answer whether a particular retailer has to collect it, because only a retailer engaged in business in that district is required to collect that district's use tax. Regulation 1827 sets out two independent ways to meet that test, and confusing them is a common and expensive mistake for a smaller, single-location retailer.

The first is physical presence: a place of business in the district, or a representative, agent, or other person operating there under the retailer's authority, soliciting or receiving orders, or delivering property, on the retailer's behalf. A retailer with one location in one county and no employees, agents, or offices anywhere else does not meet this prong for any other district, no matter how many orders it ships there.

The second, added by Assembly Bill 147 (Stats. 2019, ch. 5), is a statewide economic threshold untethered from physical presence. Regulation 1827(c)(3) states it directly: on and after April 25, 2019, a retailer is engaged in business in every district in the state, not just the one where it happens to have a location, if its total combined sales of tangible personal property in California or for delivery in California, together with sales by any related persons, exceed $500,000 in the current or preceding calendar year. The same $500,000 figure sets the statewide economic nexus threshold for the base sales and use tax at Revenue and Taxation Code section 6203(c)(4), added by the same bill and carried forward in the operative text as amended weeks later by SB 92 (Stats. 2019, ch. 34), though the two provisions carry slightly different operative dates within AB 147 itself: Section 6203's history note fixes its threshold as operative April 1, 2019, while Regulation 1827's district threshold is keyed to April 25, 2019, the date AB 147 was signed.

The consequence for a modest, single-district retailer is the one that most often gets missed. A business that ships a few thousand dollars of product a year to customers outside its home district, has no office, agent, or representative anywhere else, and has not crossed $500,000 in combined statewide sales, is not required to collect that other district's use tax on those out-of-district shipments. The district use tax is still owed on that property; the purchaser owes it directly. It collects the full combined rate within its own district and the 7.25 percent base rate everywhere else in California, until its footprint or its statewide sales volume changes the analysis. The moment combined sales cross $500,000, that changes overnight, with no separate registration trigger for each district individually: the retailer becomes engaged in business everywhere in the state at once, and every shipment into a district with a local add-on needs the destination rate applied going forward.

Shipments out of state: the one scenario where nothing is due

The destination principle has a natural edge case: what happens when the destination is not in California at all. Revenue and Taxation Code section 6396 exempts the gross receipts from a sale of tangible personal property that, under the contract of sale, is required to be shipped and is actually shipped to a point outside California, whether by the retailer's own delivery facilities or by the retailer's delivery to a carrier, customs broker, or forwarding agent for transport to that out-of-state point. The exemption is strictly evidentiary: actual delivery out of state has to occur, and paperwork reciting an out-of-state destination is not a substitute if the property is in fact handed to the customer, or picked up, inside California. A retailer relying on this exemption needs a delivery record, a bill of lading, a common-carrier receipt, something showing the property actually left the state, not merely an order form that says it should.

A related wrinkle: giveaways and donations run through the same use tax mechanics

The same destination-and-delivery framework that prices a sale also governs a use tax question that surfaces constantly in the same conversation: what happens when property never gets sold at all, because it was given away.

Regulation 1670(a) treats a person who makes a gift of property to another as the consumer of that property: the retailer, not the recipient, owes tax measured by what the retailer paid when it originally acquired the item, typically under a resale certificate that assumed a taxable sale that never happened. A business that pulls inventory to hand out as a promotional item, a sample, or a trade-show giveaway has created a taxable use of its own resale stock, self-assessed on the retailer's cost. Where the giveaway is delivered still matters, for the same reason the rest of this analysis matters: if the giveaway is delivered inside a district, the district layer can apply to that self-assessed use tax whether or not the giver is engaged in business there.

Regulation 1669(e) draws the exemption on the other side of that same coin. Tangible personal property withdrawn from resale inventory and donated, without any intervening use beyond retention, demonstration, or display, to a qualified organization located in California is not subject to use tax. "Qualified organization" tracks Internal Revenue Code section 170(b)(1)(A): religious, charitable, educational, and scientific organizations and similar categories, along with certain public agencies. The exemption has a real limit built into it: property purchased specifically with the intent to donate it, rather than held for resale and later diverted to a donation, does not qualify, and using a resale certificate to acquire property already earmarked for donation is treated as a misuse of the certificate.

Practice notes

The recurring failure across all of this is the same one: treating a financial-system field, the billing address, as though it carries legal weight it was never given. It does not appear in Regulation 1822, Regulation 1827, or CDTFA's district guidance for shipped goods, and a tax determination engine that defaults to it instead of the ship-to field is not applying California law imprecisely; it is applying the wrong fact pattern entirely. The fix belongs in how a system's order and shipping data are captured and prioritized, not in the rate table itself.

The second recurring failure is treating engaged-in-business-in-a-district as a single test rather than two independent ones. A retailer can fail the physical-presence prong and still be swept in by the $500,000 statewide combined-sales threshold, and the reverse is equally common: a retailer with a second-district presence, a representative, a delivery route run in its own vehicles, can be engaged in business there long before it comes anywhere near the dollar threshold. Both prongs need to be checked, every filing period, because the threshold prong in particular can flip a retailer's collection obligation across the entire state in the middle of a year with no separate notice from the state to mark the moment it happened.

Third, the giveaway and donation rules are easy to overlook because nothing about them looks like a sale. A marketing department handing out branded merchandise, a manufacturer sampling a new product line, a sponsorship gift bag: all of it is a self-assessed use tax event on the giver's own cost unless the narrower donation exemption applies, and the donation exemption itself depends on the property having been legitimately acquired for resale before it was diverted to a qualified organization, not purchased with the donation already in mind. G&G State Tax Group provides sales and use tax sourcing reviews and district tax exposure analysis alongside its state and local tax practice.