Plate costing: the before and after of measuring every recipe

Step 1: build the recipe card with yield measured, not estimated

Weigh the raw ingredient, weigh what survives the trimming, and write down the difference, because that gap holds money almost no costing records. Salmon coming in at 22 USD per kilo and losing 32% to skin, bone and trim really costs 32.35 per usable kilo; that 10.35 delta explains why the same dish looks profitable in the spreadsheet and never shows up in the month's profit. Deliverable: one card per dish with three columns, gross quantity, yield factor and net quantity, signed by the head chef. Verification is simple. Take your best seller, have the cook prepare it in front of you and weigh the discards; when the real percentage strays from the paper by more than three points, the card is not usable yet and the measurement goes back for two more runs.

Step 2: calculate theoretical plate cost and contribution margin in DOLLARS

Theoretical cost is the sum of the net ingredients on the card, and its mandatory companion is contribution margin: price minus cost, in money, dish by dish. Let me go back to the two plates from the opening, because they show the trap better than any theory. On percentage, the risotto (3.20 of cost, 9.50 of price, 33.7%) looks sick and lomo saltado (4.10 and 14.90, 27.5%) looks healthy. Now multiply by turnover: 62 weekly covers of risotto against 19 of lomo, and the till receives 390 USD versus 205. The worse percentage contributes almost double. What you need to build is a table of six columns: cost, price, percentage, weekly units, unit margin and weekly dollar margin. Until that last column exists, you are not costing, you are filling cells.

Step 3: reconcile theoretical cost against real inventory every period

Nobody knows whether the recipe card describes the kitchen you have or the kitchen you would like until you reconcile. The move is one subtraction: opening inventory plus purchases minus closing inventory gives real consumption, and that figure meets theoretical consumption, which comes from multiplying every dish sold by its card. We call the difference food cost variance, and it should hold under two percentage points. Past three, money is walking out through theft, over-portioning, waste or badly received purchases, in that order of frequency. One number sizes the hole: according to The Restaurant HQ, an average restaurant wastes between 4% and 10% of the inventory it buys. Deliverable for the step: a monthly variance sheet by ingredient family, three largest deviations flagged, each with a name attached.

Step 4: set the price AFTER the cost, never before or alongside it

Pricing is the last decision in the sequence, and it leans on three inputs you have already resolved: reconciled net cost, target margin in dollars, and the observed elasticity of that dish in your market. Diego F. Parra insists on that order for a cash reason rather than a methodological one: a price built on a badly calculated cost ends up held together with discounts, and discounting quietly eats EBITDA. There is a ceiling too. The National Restaurant Association recorded a restaurant price inflation peak of 8.8% in March 2023, the highest in more than two decades, and guests still carry the memory of that hit. Deliverable: a new price list, effective date on it, and beside every dish the dollar margin you have just decided to defend.

Step 5: re-cost every 14 days the twelve ingredients holding 70% of your spend

Setting costs in January and leaving them alone until the menu gets reprinted was defensible ten years ago; today it is a slow way to lose money. The USDA recorded farm-level egg prices climbing 43.1% during 2024, and 80-90% ground beef moving from 4.56 to 5.63 USD per pound by mid-2026. Under that volatility, a menu costed in January arrives stale in April. What survives real operations is not recosting everything, but isolating the twelve ingredients that concentrate 70% of purchasing and reviewing them on a fourteen-day cycle; the remaining pantry tolerates a quarterly pass. Build a board with those twelve lines, the price on the last invoice and the accumulated variation. When a line crosses 8%, the dish that uses it returns to the pricing table.

The five mistakes that ruin a well-intentioned costing exercise

Almost every broken costing that reaches my desk fails on the same five things, and none is a software problem. The first is loading payroll, rent and utilities onto the plate, when those expenses belong to break-even and not to the recipe. Next comes list price, used as though it were the price you actually paid on the last invoice. Third on the list sits ignored yield loss, capable of pushing an ingredient a third higher. Invisible inputs get forgotten too, frying oil, salt, complimentary garnish, house sauce, adding 20 to 40 cents per plate before they vanish from the paper. That leaves the fifth and costliest: killing dishes on percentage without checking turnover. I got this wrong for years. Percentage ranks the menu; rent gets paid by dollar margin times units sold.

Closing checklist: how to know the costing came out right

You are done when you can answer six things without opening a drawer. Every menu item carries a card with a yield factor measured in the kitchen and signed by whoever cooks it. The master table shows dollar margin and weekly units sold, not percentage alone. Last period's variance, theoretical against real, closed under two points. The twelve critical ingredients hold a review date inside the last fourteen days. A date and an owner appear on the live price list. Payroll, rent and utilities never entered the card. Six statements that hold and the system is alive; one that fails and the number you are staring at is an opinion formatted as a table. Start tomorrow with your highest-turnover dish: weigh it raw, weigh it trimmed, write down the difference.

Four differences that move cash

YIELD. Number one is not a software difference or a discipline difference: it is a scale. That salmon at 22 USD a kilo loses nearly a third in cleaning and ends up costing 32.35 for every usable kilo, so there are ten-odd dollars per kilo deciding whether the margin is real or merely on paper. FREQUENCY. Recosting in January for the whole year made sense when the supplier raised prices in January. With fresh product swinging by the quarter, a fourteen-day cycle over the dozen ingredients that carry 70% of food spend catches nearly all the movement for a fraction of the work, and the rest of the pantry survives a quarterly look.

Four differences that move cash — in practice

UNIT OF MEASURE. I defended percentage food cost longer than I care to admit, and under that banner I helped retire plates that were holding the cash together. Percentage works as a traffic light capped at 32%. The decision belongs somewhere else: dollar margin times turnover, the only figure that reaches the EBITDA line. CLOSING THE LOOP. Costing without reconciling amounts to writing a budget and never opening the bank statement. Theoretical cost says what should have been spent; inventory consumption says what was spent. Theft, over-portioning, waste and purchasing errors all live in the gap between those two numbers, and the gap only surfaces when somebody sits down to subtract every fifteen days.