Restaurant Accounting: How to Control Food Costs & Maximize Profit Margins

Mastering Your Restaurant’s Prime Cost: 4 Accounting Strategies to Protect Your Profit Margins

Running a successful restaurant takes extraordinary passion, culinary skill, and endless dedication. However, even a restaurant packed with happy diners every night can struggle financially if operating costs aren't tightly managed.

In the restaurant industry, profit margins are notoriously thin—often hovering between 3% and 7%. When inflation drives up wholesale food prices and labor costs rise, keeping your restaurant in the green requires more than just high sales volume. It requires active financial management.

At GP Accounting LLC, we work with food service owners to build strong accounting systems that protect earnings. Here are four foundational restaurant accounting strategies to gain control over your numbers and build a more resilient business.

1. Calculate and Track Your Prime Cost Weekly

If there is only one financial metric you monitor closely, make it your Prime Cost. Your prime cost is the combination of your Cost of Goods Sold (COGS)—which includes all food and beverage expenses—and your Total Labor Costs (wages, taxes, and benefits).

• Industry Benchmark: For most independent restaurants, target a prime cost of 60% or lower of total revenue.
• Why Weekly Matters: Waiting for monthly profit and loss (P&L) statements makes it hard to address overspending in time. Calculating prime cost weekly allows you to adjust staff schedules or swap menu ingredients before a bad week turns into a bad quarter.

2. Engineer Your Menu for Maximum Profitability

Not all high-selling dishes drive equal profits. Menu engineering is the process of analyzing both the popularity and the profitability of every item on your menu.

Categorize your menu items into four buckets:

1. Stars: High popularity, high profitability. (Keep these front and center on your menu.)
2. Plowhorses: High popularity, low profitability. (Consider slight price increases or portion adjustments.)
3. Puzzles: Low popularity, high profitability. (Rebrand, highlight with visual design, or train staff to suggest them.)
4. Dogs: Low popularity, low profitability. (Remove these items to simplify inventory and reduce waste.)

Updating your cost per plate regularly ensures your menu prices reflect current wholesale supplier costs.

3. Implement Strict Inventory and Waste Controls

Unrecorded waste, spoilage, and theft silently erode your profits. Treat your inventory like cash sitting on your shelves.



• Conduct Regular Stock Takes: Perform weekly counts on high-cost items (like premium meats and alcohol) and monthly counts on dry goods.
• Track Waste Logs: Instruct kitchen staff to record spoiled food, miscooked orders, and extra prep waste.
• Match Invoices to Inventory: Compare supplier invoices against your order sheets to catch price spikes, missing items, or billing errors before paying.

4. Separate Food and Beverage Accounting

Combining food, liquor, wine, and beer into a single "Cost of Goods Sold" category hides key operational insights. Pour costs and food costs behave very differently: