Sales Tax in California: A Complete Guide for Ecommerce Sellers

California has the highest economic nexus threshold of any state ($500,000) and some of the most complex sales tax administration in the country. The state rate is 7.25%, but local district taxes push combined rates up to 10.75% in some jurisdictions. California is not an SST member state, so registration and filing happen directly through the CDTFA, and the third-party access PIN process creates a notable delay for sellers working with accountants or tax software.

Quick reference

Economic nexus

California’s threshold is $500,000, five times higher than the $100,000 threshold in most states. Only sellers with significant California revenue are required to register as remote sellers.

The threshold measures gross sales into California during the preceding or current calendar year. There is no transaction count threshold.

Once the threshold is crossed, registration and collection obligations begin. California’s rules on the exact timing of the collection obligation (which day after threshold crossing) should be confirmed with a tax advisor, as the state has historically used the calendar year approach.

Physical nexus

California physical nexus triggers:

• Office, retail location, warehouse, or storage facility in California
• Inventory in California, including Amazon FBA fulfillment centers (California has several)
• Employees or contractors based in California
• Sales representatives working in California

FBA sellers with inventory at Amazon’s California fulfillment centers have California nexus regardless of sales volume, physical nexus has no dollar threshold.

Registration

Register at the CDTFA Online Services portal (cdtfa.ca.gov). Registration is free and processes quickly: the permit itself is issued within a few days of completing the online application.

The PIN-by-mail issue: California mails a third-party access code (the “PIN”) to your registered business address when you or your software need access rights beyond the primary account holder. This letter typically takes 1–3 weeks to arrive. If you’re setting up TaxCloud, TaxJar, or another platform that requires third-party access, plan for this delay. Apply for the PIN immediately after registration, don’t wait until you need to file.

Quarterly prepayment: California requires large sellers (those whose quarterly tax liability exceeds $20,000) to make prepayments during the quarter. This affects sellers with very high California volume.

Tax rates

State rate: 7.25% (6% state + 1% Bradley-Burns local + 0.25% county transportation)

Local district taxes: California allows local jurisdictions to levy additional district taxes on top of the 7.25% base rate. District taxes are approved by voters and vary by city and county.

Combined rates range from 7.25% (areas with no local district taxes) to 10.75% (select high-rate jurisdictions in Los Angeles County, Santa Cruz, and others).

The CDTFA provides a rate lookup tool (find a sales tax rate on cdtfa.ca.gov) that returns the exact rate for any California address. Jurisdiction-level calculation software is essential in California, zip-code-level rates are unreliable given the district tax patchwork.

What’s taxable

Generally taxable: Electronics, apparel (no clothing exemption in California), furniture, sporting goods, beauty products, pet supplies, most tangible goods.

Generally exempt:

• Prescription medications
• Most food products for human consumption (groceries)
• Agricultural products

Notable California rules:

• Candy and snack food: Generally taxable in California (unlike many states that exempt food broadly)
• Digital products: Not taxable in California, software delivered electronically, digital books, digital music are generally exempt
• SaaS: Generally not taxable in California (software as a service is treated as a service, not a product)
• Partial exemption for manufacturing/R&D: California offers a 3.9375% partial sales tax exemption on qualifying equipment used in manufacturing or R&D. This reduces the effective rate on eligible purchases, relevant for brands with California-based production.

Shipping taxability

California’s rule is conditional:

• Shipping via common carrier (UPS, FedEx, USPS), separately stated: Generally not taxable for taxable goods
• Shipping included in sale price / not separately stated: Taxable as part of the sale
• Seller’s own delivery vehicle: Taxable
• Mixed shipments (taxable + non-taxable goods): The taxable portion of freight is taxable; requires allocation

For most ecommerce sellers using third-party carriers with shipping listed separately on the invoice, California shipping charges are generally not taxable. When in doubt, separately state shipping charges.

Marketplace facilitator rules

California enacted marketplace facilitator legislation effective October 1, 2019. Amazon, Etsy, Walmart, and other qualifying platforms collect and remit California sales tax on marketplace-facilitated sales.

If all your California sales are through marketplace facilitators and you have no physical nexus (no employees, no inventory in California), California does not require separate registration. If you have physical nexus (including FBA inventory) you must register and file regardless of whether marketplace facilitators collect on your behalf. In that case, your California return will deduct marketplace-facilitated sales and show tax owed only on your direct-channel sales.

State-specific notes

Third-party access PIN: Plan 2–4 weeks for the PIN letter to arrive after registration. During this window, your tax software may have limited access. Register early, before your first filing period.

No annual filing: California does not offer annual filing frequency. Most sellers are assigned quarterly, with the largest sellers assigned monthly with prepayment requirements.

Destination sourcing for remote sellers: California uses destination sourcing for remote sellers (out-of-state sellers) — tax is based on where the customer is located. Intrastate California sellers have more complex rules.

CDTFA rate lookup is authoritative: California’s rate patchwork is complex enough that you should use the CDTFA’s own lookup tool to verify rates for any California address before relying on zip-code estimates.