Restaurants are the CDTFA’s favorite audit target because cash plus estimated methods equals adjustable numbers. If your restaurant is under audit, the fight will not be about your returns — it will be about the auditor’s model of your restaurant.
Here is how the model gets built. The auditor takes your purchase invoices — food, beverage, liquor — and applies a markup to reconstruct what you “should” have sold. Or they sit in your dining room for a few days (an observation test) and project those days across three years. Or they compare your credit-card sales ratio to your reported cash. Every one of those methods has failure points a restaurant owner recognizes instantly: comped meals, employee meals, spillage and waste, spoilage, happy-hour pricing, menu changes, the pandemic-era mix shift to delivery apps whose fees distort the ratios.
Where restaurant audits go wrong
The markup is generic. Auditors reach for standard industry markups; your actual menu math — portion costs, price points, discount patterns — is evidence, and it usually beats the table.
The observation days are unrepresentative. A Friday-Saturday sample projected over 1,095 days overstates a business with slow Tuesdays. The sample’s design is contestable, and so is its arithmetic.
Cold food, hot food, and to-go rules get mangled. California’s taxability rules for food sales are genuinely complicated (the 80/80 rule, cold food to go, dine-in versus takeout), and misclassification cuts both ways — some of what the auditor calls taxable was not.
Tips, service charges, and delivery-app receipts each have their own treatment, and third-party app reporting rarely matches the auditor’s assumptions cleanly.
The stakes are bigger than the audit
A large deficiency plus a cash-heavy operation is the profile the CDTFA refers for criminal investigation — POS suppression cases in particular are prosecuted. And if the restaurant cannot pay, § 6829 personal liability reaches the owners. Both outcomes are usually avoidable when the audit is defended properly from the records-request stage — which is exactly when most owners are still handling it themselves.
We defend restaurant audits regularly — the pattern above comes from our own matter book, not a textbook. The work runs flat-fee or monthly, quoted before you sign.
How engagements work
Many matters like this one run as a monthly flat-fee engagement: one number, agreed up front, that covers the work — agency contact, deadlines, document responses, strategy — until the matter resolves. Shorter, well-defined projects are often a one-time flat fee instead, and some matters genuinely fit hourly billing better. We will tell you which you are looking at on the first call, before you commit to anything. If you want the details first, see how we price our work.
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Related: CDTFA audit defense · markup tests explained · fighting back with statistics.
By Sam Brotman, JD, LLM, MBA — managing attorney, Brotman Law. CA Bar No. 274966. Last updated August 29, 2026.
