Restaurant Bookkeeping: Food Cost, Prime Cost, and the Numbers That Keep You Open

A restaurant that does not know its food cost percentage weekly is flying blind. Food cost (the cost of ingredients as a percentage of food revenue) and prime cost (food cost plus labor cost as a percentage of total revenue) are the two numbers that separate restaurants that survive from restaurants that close. The National Restaurant Association’s data consistently shows that restaurants with food cost above 35% and prime cost above 65% are on a trajectory toward failure, and the margins are thin enough that a 2-3 point swing in either number changes the outcome from profitable to break-even. The bookkeeping exists to produce these numbers in time to act on them, not to produce a tax return 15 months after the fact.

What is food cost and how do I calculate it?

Food cost percentage is the cost of the ingredients used to produce the food sold, divided by the revenue from food sales, expressed as a percentage. The formula: (Beginning Inventory + Purchases - Ending Inventory) / Food Revenue = Food Cost Percentage.

The “used” distinction is critical. Food cost is not what you bought; it is what you used. If you buy $15,000 in ingredients during the week but your inventory increased by $2,000, you used $13,000. If your food revenue was $40,000, your food cost is 32.5%. If you use purchases instead of actual usage (the common shortcut), you overstate food cost in weeks when you stock up and understate it in weeks when you draw down inventory.

A full-service restaurant typically targets 28-35% food cost. Fast casual runs lower (22-28%) because the ingredient mix is simpler and portion control is tighter. Fine dining can run higher (33-40%) because the ingredient quality drives the premium, and the check average absorbs it. The benchmark matters less than the trend: a restaurant running 31% consistently is healthy; a restaurant that swings from 28% to 36% week to week has a control problem (waste, theft, portion creep, or receiving errors).

The weekly calculation requires a physical inventory count of at least the high-cost items (proteins, seafood, produce, dairy, alcohol). A full inventory of every item in the walk-in and dry storage is ideal but time-consuming; the compromise is to count the top 20-30 items by dollar value weekly and count everything monthly. The monthly count feeds the financial statements and the tax return; the weekly count feeds operational decisions.

What is prime cost and why does it matter more?

Prime cost is food cost plus total labor cost (including payroll taxes, workers’ comp, health insurance, and benefits), divided by total revenue. It captures the two largest variable costs in the restaurant and tells you how much of every dollar goes to ingredients and people before anything else is paid.

The benchmark: 55-65% of total revenue. Below 55% is exceptional (either a high-check-average concept with low labor or a fast-casual model with minimal service). Above 65% means the restaurant is unlikely to cover rent, utilities, insurance, and debt service and still produce a profit. The 60% midpoint is the most common target for a healthy full-service restaurant.

Breaking prime cost into its components: if total revenue is $100,000 per month, food cost is $32,000 (32%), beverage cost is $6,000 (24% of beverage revenue, blended into the total), and total labor cost is $28,000 (28%), then prime cost is $66,000 / $100,000 = 66%. That is 1 point above the target ceiling, and the fix is either in food cost (menu engineering, portion control, waste reduction, vendor renegotiation) or labor (scheduling optimization, cross-training, reducing overtime).

How should I set up the chart of accounts?

The chart of accounts for a restaurant should produce the food cost and prime cost numbers without manual calculation. The structure:

Revenue accounts: Food Revenue, Beverage Revenue (beer, wine, liquor separated if you want pour-cost tracking), Catering Revenue, Delivery/Takeout Revenue (if pricing differs), Gift Card Redemptions, Other Revenue. Separating food from beverage revenue is essential because the COGS percentages are different (food 28-35%, beverage 18-24%), and blending them obscures both.

Cost of Goods Sold: Food COGS, Beer COGS, Wine COGS, Liquor COGS. Some operators also separate Paper/Packaging COGS (cups, containers, bags) if delivery/takeout is a significant percentage of revenue.

Labor: Hourly Wages (FOH), Hourly Wages (BOH), Management Salaries, Payroll Taxes, Workers’ Compensation, Health Insurance/Benefits, Contract Labor (temp staffing). Separating front-of-house from back-of-house labor helps diagnose whether a labor cost problem is on the service side or the kitchen side.

Occupancy: Rent/Lease, CAM/Triple Net Charges, Property Tax (if applicable), Property Insurance. These are fixed costs that do not change with revenue, so tracking them separately from variable costs gives you the contribution margin.

Operating expenses: Utilities, Repairs and Maintenance, Smallwares and Equipment, Cleaning Supplies, Paper Goods (if not in COGS), Marketing and Advertising, Technology (POS subscription, online ordering, reservation system), Professional Fees (accounting, legal), Permits and Licenses, Music/Entertainment Licensing.

In QuickBooks Online, set up the COGS accounts under Cost of Goods Sold (not under Expenses) so the Profit & Loss report shows Gross Profit after COGS and before labor. The prime cost calculation then adds labor to COGS and divides by revenue.

How do I integrate the POS with the books?

The POS system (Toast, Square, Clover, Lightspeed, Revel) records every transaction at the point of sale: the items sold, the payment method, the tip amount, and any discounts or comps. The integration with QuickBooks or the accounting system automates the revenue recording and, in some cases, the COGS recording.

The basic integration: the POS sends daily sales summaries to QuickBooks. Each day, a journal entry records total food sales, beverage sales, tax collected, tips collected, discounts given, and the payment method breakdown (cash, credit card, gift card). The cash and credit card deposits hit the bank account; the tips are distributed through payroll; the tax collected is a liability until remitted.

The more advanced integration: the POS tracks theoretical food cost by multiplying each menu item sold by its recipe cost (the cost of the ingredients in the recipe, based on current vendor prices). This gives you a “theoretical” food cost each day, which you compare against your actual food cost from inventory counts. The gap between theoretical and actual is your variance, and it tells you where the waste, theft, or portioning errors are.

Not every POS does this well. Toast and MarginEdge have the strongest food-cost tracking for independent restaurants. Square is simpler and works for fast-casual and coffee shops but lacks the recipe-costing depth. Restaurant365 is a full accounting and operations platform that replaces QuickBooks entirely and provides integrated food cost, labor, and P&L reporting. The right choice depends on the restaurant’s complexity and the operator’s willingness to maintain recipe costs in the system.

When should I count inventory?

Weekly for proteins, seafood, and high-cost produce. Monthly for everything else. The weekly count does not need to be a full walk-in-and-dry-storage audit. It should cover the 20-30 items that represent 70-80% of your food cost by dollar value. For most restaurants, that list includes beef, chicken, pork, seafood, cheese, dairy, cooking oils, and the most expensive produce items.

The monthly count is a full physical inventory: every item in the walk-in, freezer, dry storage, and bar. This count feeds the monthly financial statements and produces the actual food cost and beverage cost percentages that appear on the P&L. The monthly count should be done on the same day each month (typically the last day of the month or the last day before the accounting period closes) and at the same time (before service, after the morning delivery).

The count must be priced at the most recent purchase cost for each item (the “last cost” method, which is the most common for restaurants). QuickBooks does not handle restaurant inventory well out of the box; most operators use a separate inventory tool (MarginEdge, BlueCart, Lightspeed Inventory) and import the ending inventory value into QuickBooks as a journal entry.

The tax treatment of inventory for restaurants has been simplified by the IRC 448(c) small business exception. Restaurants meeting the gross receipts test (under $31 million in average annual gross receipts) can use the cash method and are not required to maintain inventories under the accrual method. They can treat inventory as non-incidental materials and supplies under Reg 1.162-3, deducting the cost when used rather than capitalizing it. This does not change the operational need for inventory counts (you still need them to calculate food cost), but it simplifies the tax reporting.

What should I do next?

If your restaurant does not have a weekly food cost number, start with a weekly count of your top 20 items. If your chart of accounts does not separate food COGS from beverage COGS, restructure it before the next month-end close. If you are not claiming the FICA tip credit, that is the single largest tax dollar you are leaving on the table.

• Restaurant inventory management, food waste tracking, shrinkage, spoilage deductions, and donation credits
• Restaurant entity structure: LLC vs S-corp, when the S-corp election saves self-employment tax and the multi-entity structure that protects assets
• FICA tip credit, the $18K-$80K/year tax credit for restaurants with tipped employees
• Trust fund recovery penalty, personal liability when payroll taxes go unremitted (a common failure mode for restaurants in cash flow distress)
• Cost segregation after bonus depreciation, the accelerated deduction for restaurant buildout and leasehold improvements
• Construction contractor tax deductions, the parallel bookkeeping guide for another industry with complex COGS
• IRS installment agreement, the payment structure when restaurant tax debt accumulates

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.