California sales tax is a layered system. The base statewide rate is 7.25%, but that’s rarely what you actually charge. Local district taxes get added on top, and those vary depending on where the sale happens. In San Diego, the combined rate is typically 7.75%, though some areas within the county have additional district taxes that push it higher.

The rate you charge depends on where the customer receives the goods. If you’re shipping to a customer in Los Angeles, you charge the LA rate. If someone picks up at your San Diego location, you charge the San Diego rate. This destination-based sourcing creates complications for businesses selling across the state.

Most tangible goods are taxable. Clothing, electronics, furniture, building materials, equipment. Food gets complicated because grocery items are generally exempt while prepared food is taxable. Professional services are typically not taxable, which is why accountants and consultants don’t charge sales tax on their invoices. But if you’re selling a physical product alongside a service, the product portion may still be taxable.

You need to register with the California Department of Tax and Fee Administration before collecting sales tax. They’ll issue you a seller’s permit and assign your filing frequency based on expected tax liability. High-volume businesses file monthly. Smaller operations file quarterly or annually. Returns are due on the last day of the month following your reporting period.

Late filings trigger penalties immediately. California charges 10% of the tax due if you file late, plus interest that compounds. Filing a return with no payment is better than not filing at all because the penalties for not filing are worse than the penalties for not paying.

Managing sales tax compliance requires tracking rates for every jurisdiction where you sell, applying the correct rate to each transaction, and filing accurate returns on schedule. Most point-of-sale systems handle rate calculations automatically, but the liability for getting it right still falls on you.

The complexity catches many San Diego business owners off guard. A bookkeeping service familiar with California sales tax can set up your systems correctly from the start and make sure you’re collecting and remitting the right amounts. Getting audited and owing back taxes plus penalties costs far more than doing it right the first time.