How to calculate true food cost

Most restaurant owners look at the COGS line on their P&L and assume it represents their true food cost. In practice, that number is almost always incomplete — it reflects what was purchased in a period, not what was actually used to generate revenue.

The four adjustments that matter most are opening and closing inventory, transfers between locations or bars, employee meals, and waste. Skip any of them and your cost of goods percentage can swing by two to four points in either direction.

Once you have a true food cost, the next step is to tie it back to your menu mix. A weighted plate cost will show you which items are pulling margin down and which are quietly subsidizing the rest of the menu.

The operators who consistently hit their targets are the ones who reconcile theoretical to actual food cost every period — not just quarterly, and not just when something looks off.