California Sales Tax Economic Nexus Guide (AB 147)

California is the largest eCommerce consumer market in the United States. Following the enactment of Assembly Bill 147 (AB 147), remote sellers and online retailers delivering products into California are subject to specific statutory thresholds administered by the California Department of Tax and Fee Administration (CDTFA).

1. What Counts Toward the $500,000 Threshold?

Under CDTFA regulations, the $500,000 calculation includes:

• Taxable Retail Sales: Physical goods sold directly through your Shopify, WooCommerce, or Magento store.
• Exempt Sales: Sales of exempt tangible personal property and wholesale/resale transactions with resale certificates.
• Marketplace Sales: Sales facilitated through registered marketplace facilitators like Amazon, eBay, or Walmart. Important: Even though Amazon collects and remits the tax on your behalf, those marketplace sales count toward your $500,000 California threshold.

2. California District Taxes (District Use Tax)

California's statewide base sales and use tax rate is 7.25%. However, hundreds of local cities and counties impose voter-approved "district taxes," bringing total effective tax rates up to 10.75% in certain jurisdictions (such as Alameda, Los Angeles, and San Francisco counties).

Once you cross the $500,000 statewide threshold, you are automatically deemed to be "engaged in business" in all California tax districts and must collect and report the applicable local district use tax based on the delivery destination.

3. Registration & Registration Deadlines

Once your sales surpass $500,000, you are legally required to register with the CDTFA for a California Certificate of Registration – Use Tax before making your next taxable sale. Registration is completed online through the CDTFA Online Services portal.

4. Mitigating Penalties via Voluntary Disclosure

If your business crossed $500,000 in previous calendar years without obtaining a permit, the CDTFA maintains an active In-State and Out-of-State Voluntary Disclosure Program. Eligible businesses can obtain a full waiver of late filing and payment penalties and limit the look-back assessment period to three years.