California Sales Tax for Ecommerce Sellers (2026 Guide)

California sales tax starts at 7.25%, the highest base rate in the country, and district taxes push combined rates past 10% in parts of the Bay Area and Los Angeles County. Remote sellers must register with the CDTFA once total California sales exceed $500,000 in the current or preceding calendar year, marketplace sales included. Marketplaces collect on their own orders, districts add genuine complexity, and hanging over all of it is the FBA back-tax saga, the most aggressive state enforcement campaign ecommerce has seen. Here's the whole system, piece by piece.

The rate: what's inside 7.25%

The statewide base is 7.25%: 6% state, plus a mandatory 1.25% local portion (the Bradley-Burns rate) that goes to cities and counties. That's the floor everywhere in California; no address pays less. On top sit district taxes, voter-approved add-ons ranging from 0.10% to 1.5% or more each, and they stack. Combined rates run 7.25% in the few district-free areas to 10.25% in much of LA County and up to 10.75% in a handful of Alameda County cities. Rates shift as districts pass and expire, so use the CDTFA's address-level lookup (or a tax engine that does), not a county table from last year.

District taxes: the complexity that's actually yours

Districts are where California differs from a simple destination-rate state. Technically, a seller must collect a given district's tax only if "engaged in business" in that district; sales into other districts obligate the customer to self-report use tax, which consumers essentially never do. Sellers used to thread this needle district by district. AB 147 ended the game for anyone at scale: once your statewide sales pass $500,000, you're deemed engaged in business in every district and must collect the full combined rate at every delivery address.

The compliance load shows up on the return: California wants collected tax allocated by district on Schedule A, which for a seller shipping statewide means an allocation across dozens of jurisdictions every period. This is the single best argument in any state for automated rate calculation, and equally for books that can regenerate the by-district detail when the CDTFA asks. Hand-built spreadsheets survive contact with most states; California's Schedule A is not most states.

Economic nexus: $500,000, marketplace sales included

The threshold is $500,000 of total combined sales of tangible personal property delivered into California in the current or preceding calendar year. No transaction count, and unlike Florida's taxable-sales-only test, California counts everything: marketplace sales, direct sales, exempt sales, wholesale. Amazon doing $450,000 of your California volume plus $80,000 through Shopify puts you over, even though Amazon handles its share of the tax. Same headline number as Texas, measured differently: Texas looks at the preceding twelve months rolling; California uses calendar years, current or prior.

Cross it and the obligations come as a pair: register with the CDTFA, and collect at full combined rates in every district (the AB 147 rule above). For a marketplace-only seller, registration can still technically be required while actual collection is nearly all handled by the platforms; the return mostly reports facilitator-collected volume. Tedious, not expensive, and skipping it invites the letters discussed below.

Marketplace facilitator rules

Since October 2019, marketplaces over the threshold (Amazon, Walmart, eBay, Etsy, TikTok Shop, all of them) collect and remit on marketplace orders into California, and the facilitator, not you, is the retailer of record for those sales. What stays on your plate is the familiar list: your direct channels once you're over $500,000 or otherwise engaged in business here; keeping facilitator-collected tax out of your revenue line (it flows through settlements and inflates sales on deposit-based books, the core failure in our Amazon bookkeeping problems guide); and filing whatever returns your open account requires, on time, even at zero due. California's penalties run 10% of tax for late filing with interest on top, and the CDTFA issues estimated assessments against silent accounts with the state's usual optimism.

The FBA saga: how California chased warehouse inventory

This history matters because it explains every scary letter an FBA seller has ever received. California's position, dating to the mid-2010s under the CDTFA's predecessor, was that inventory sitting in an in-state Amazon warehouse gave the seller physical nexus, and therefore an obligation to have been registered and collecting, reaching back to whenever the inventory first arrived. Amazon handed over seller data under legal demand, and the CDTFA mailed tens of thousands of letters demanding registration and back taxes, in some cases claiming up to eight years of liability from sellers who'd never set foot in California and had no idea which warehouse Amazon chose for their goods.

The campaign produced litigation (the Online Merchants Guild fight), legislative patches, and eventually partial relief: marketplace collection from October 2019 mooted the go-forward issue, and later guidance and settlement programs softened lookback for many sellers. But the CDTFA never formally abandoned the theory, old assessments still exist, and the lesson generalizes: where a marketplace stores your inventory is a fact with tax consequences, and states can get the data. If a pre-2019 California exposure letter is sitting in your drawer, that's a case for professional help through our tax services team, not a form to fill out casually; limitation periods and settlement postures make the order of operations matter.

Today's practical FBA picture is calmer: marketplace orders are collected by Amazon, so in-state inventory mainly matters if you also sell direct, where it creates collection obligations from dollar one regardless of the $500,000 test. Amazon's California footprint is enormous, so assume your FBA stock is in state unless your reports say otherwise.

Registering with the CDTFA

Registration is free, done online through the CDTFA's portal, and issues a seller's permit per location (remote sellers register as a single out-of-state location). You'll be asked for projected sales, which drives filing frequency: quarterly is the default for most, monthly for large accounts, annual for tiny ones, and sellers averaging $17,000 or more per month in taxable sales get quarterly prepayments layered on, a cash-flow wrinkle worth planning for. Returns are due the last day of the month following the period, ten days later than Texas's 20th, and there's no California equivalent of Florida's collection allowance or Texas's timely-filing discount: compliance here pays nothing but avoided penalties.

International sellers can register: the CDTFA accepts foreign businesses, and the practical prerequisite is a US EIN, which non-residents get through the fax-and-phone process in our tax ID guide. Foreign-owned LLCs should have the federal house in order first, Form 5472 above all; the full stack is on our international sellers page.

With the permit comes a resale certificate, so you buy inventory tax-free for resale, and the matching use-tax duty when you pull inventory for personal use, giveaways or influencer seeding: those units come out at cost and the use tax gets reported. Auditors check it precisely because nobody bothers, and clean inventory records make it a report instead of an estimate.

A worked example: what a typical remote seller owes California

Take a Texas-based brand doing $520,000 into California this year: $430,000 through Amazon and $90,000 direct through Shopify. Over the $500,000 line, so the obligations attach. The annual picture:

• Sales tax on Amazon orders: $0 out of pocket; Amazon is the retailer of record and remits it all.
• Sales tax on Shopify orders: collected at each delivery address's full combined rate under the AB 147 rule, roughly $8,100 across the year at typical blended rates, then allocated by district on Schedule A and remitted quarterly. Collected properly, it costs you checkout configuration and filing time. Collected wrong (say, at 7.25% flat into a 9.5% district), the shortfall comes out of your margin, order after order.
• Prepayments: only if your taxable direct sales average $17,000 or more a month. At $7,500 a month, this seller files plain quarterly returns.
• The filings: four returns with district schedules, maybe five hours a year with books that produce by-district detail automatically, an unpleasant weekend per quarter without them.

Total real cost of compliance: modest and predictable. The alternative compounds the way state problems always do: an eight-year lookback applies to sellers who never filed, versus three years for those who did, which is among the strongest arguments in any state for registering once the threshold is genuinely crossed.

If the CDTFA writes to you first

California finds sellers; it doesn't wait for them. Marketplace data, customs records and FBA inventory reports all feed discovery, and the standard opener is a letter or questionnaire about your California activity: inventory locations, channels, sales volume, dates. Three rules for that moment. Don't ignore it; silence converts a questionnaire into an estimated assessment, computed generously in the state's favor. Don't answer it casually either, because your answers define the scope of everything that follows, including how many years are on the table. And know your leverage before responding: out-of-state sellers who come forward through voluntary disclosure generally get the lookback capped at three years with penalty relief, an option that can evaporate once the state initiates contact, which is exactly why the order of operations matters. Answering with settlement-level books behind you is a half-hour exercise; answering from bank statements is how sellers concede nexus and years they never owed. Get a specialist into the conversation before your first reply, not after your second.

California sales tax FAQ

What is the California sales tax rate in 2026? 7.25% minimum statewide; combined rates with district taxes commonly run 8.75% to 10.25%, topping out around 10.75%. Always resolve the rate by delivery address, not by city name; district lines don't follow zip codes.

Is shipping taxable in California? Not if you do it right: separately stated shipping at your actual cost, sent by common carrier, is exempt. Charge $7 flat when the label cost $5.20 and the markup portion is taxable. Handling is taxable, and combined "shipping and handling" lines are presumed taxable. This is the fussiest shipping rule of any state we cover; configure it deliberately.

Are digital products and SaaS taxable in California? Generally no. Electronically delivered software and digital goods with nothing tangible attached sit outside the sales tax, same friendly posture as Florida and the opposite of Washington.

Are groceries and clothing taxable? Most food products for home consumption are exempt; clothing is fully taxable at any price, unlike states with apparel exemptions or holidays.

I only sell through Amazon FBA. Do I owe California anything? Amazon collects the tax on your marketplace orders. Whether you personally must register turns on inventory presence and your total California volume; many marketplace-only sellers over the threshold register and file simple facilitator-reported returns, and anyone with pre-2019 FBA history in the state should know the saga above before responding to any CDTFA mail.

What if I drop back under $500,000 next year? The threshold tests the current and preceding calendar year, so falling below it for a full cycle can end the collection obligation prospectively, but not automatically: the permit stays open, and open permits owe returns, until you close or update the account with the CDTFA. Sellers who quietly stop filing because "we're under the line now" collect late notices on zero-due periods, which is the most avoidable penalty in the whole system. Measure every January, and if the answer changes, tell the state rather than assuming it noticed.

The bookkeeping that survives a CDTFA audit

California audits are thorough and data-driven: they'll want marketplace reports, by-district sales detail, resale certificates from wholesale customers, and books whose revenue ties to settlements and 1099-Ks rather than bank deposits. The three-year standard lookback (eight if you never filed) rewards sellers whose monthly close already produces state-and-district-level gross by channel; that's a first-week deliverable of a real monthly bookkeeping engagement. If your books can't tell you your California sales by channel for last year in five minutes, start with our free Books Teardown, request one here, and we'll show you exactly where the gaps are before the state does.