California sales tax for restaurants comes down to a few rules that sound simple but get complicated fast in practice.

Prepared food sold for consumption on the premises is taxable. That means virtually everything a sit-down restaurant serves, whether it’s an entrée, a side, or a dessert, is subject to sales tax. Hot prepared food is always taxable regardless of where it’s consumed. Cold prepared food becomes taxable when it’s sold for eating on-site.

Alcohol is always taxable. Beer, wine, cocktails, no exceptions. There’s no scenario where alcohol sold at a restaurant is exempt from sales tax in California.

Unprepared food and groceries are generally exempt. This matters more for businesses that straddle the line, like a bakery selling whole loaves of bread to go or a cafe selling bags of coffee beans. For a typical restaurant, most of what you sell is prepared and therefore taxable.

Here’s where it gets tricky. California has what’s called the 80/80 rule. If more than 80% of your total sales are food and beverages AND more than 80% of your food sales are taxable (prepared, heated, served for on-premises consumption), then all of your sales are presumed taxable. Most sit-down restaurants and many fast-casual spots meet both thresholds. When this applies, you charge sales tax on everything unless you can prove specific items were exempt.

You can overcome the presumption, but only with records. If you sell some items that would normally be tax-exempt, like bottled water to go or a packaged bag of chips, you need to track those sales separately to avoid charging tax on them. Your POS system has to be configured to distinguish taxable from non-taxable items. Without that tracking, the CDTFA will treat your entire revenue as taxable during an audit.

Speaking of audits, the CDTFA can look back up to 8 years. That’s a long window. If your POS system has been misconfigured for years, taxing items that should be exempt or worse, not collecting tax on items that should be taxed, the liability adds up quickly. Penalties and interest on top of the back taxes make it even more painful.

The practical steps are straightforward. Set up your POS categories correctly from day one. Every menu item should be flagged as taxable or exempt. Alcohol should always be in its own taxable category. Review your settings whenever you change your menu. Reconcile your POS sales reports against your sales tax filings regularly so discrepancies don’t pile up.

If you’re opening a new restaurant in the Buena Park or Orange County area, or you’ve been operating and aren’t sure your sales tax setup is right, working with bookkeepers in Buena Park who understand restaurant accounting can save you from expensive corrections down the road. Getting it right now is always cheaper than fixing it after a CDTFA notice shows up.