The 30/30/30/10 Rule for Restaurant Menu Planning Explained

What the four numbers usually stand for

The most common reading is this. Food cost is what you spend on the ingredients for the dishes you sell. Labour is what you spend on the people who prepare and serve them, including salaries, social contributions and the manager's time. Overhead is everything that keeps the doors open however busy you are: rent, utilities, insurance, licences, equipment, repairs, marketing and software. Profit is what remains.

Because these are shares of revenue, the four numbers are meant to add up to 100. If one bucket grows, another has to shrink, and the easiest one to squeeze is usually profit. That is the real message of the rule: it shows how little room a restaurant has when any single cost drifts upward.

Be aware that this is only one interpretation. Some operators count drinks separately from food, some put payroll taxes into overhead instead of labour, and some include packaging or card fees in food cost. Whichever definitions you choose, apply them the same way every month, otherwise your comparisons mean nothing.

Why it is a rule of thumb and not a standard

Nobody audits a restaurant against 30/30/30/10. The split is round because it was designed to be remembered, and real businesses are rarely round. A café with a small kitchen, a steakhouse and a busy takeaway counter can all be healthy while looking quite different on paper.

That is why we would advise against quoting the rule as if it were a benchmark for your whole sector. Treat it as a way to ask better questions: which of my costs is the largest, which one moved most recently, and which one can I actually influence?

The rule also says nothing about the quality of the numbers going into it. A tidy 30% food cost is meaningless if portions vary from cook to cook or if you have not updated your supplier prices in months.

How to use the rule when planning a menu

Start with your own figures. Take a recent month and sort every expense into the four buckets, using the definitions above. Divide each one by that month's revenue. You now have your own split, which is more useful than any textbook example.

Then compare it with 30/30/30/10 and look at the gap. If food cost is running above its share, the menu is the first place to look: portion sizes, recipe consistency, supplier prices, waste, and what you charge. If labour is high, look at how complicated the menu is. Dishes with long prep lists or many separate components consume hours of paid time, so a simpler menu often lowers labour as well as food cost.

Overhead is the hardest bucket to change through the menu, since rent and utilities do not care what you serve. What the menu can do is bring in more revenue against the same fixed costs, which lowers overhead as a share of sales. Finally, remember that profit is a result, not a plan. If the first three buckets add up to more than 90%, the 10% you were counting on is simply not there.

Where the rule breaks down

The rule assumes a typical sit-down restaurant. A place where the owner cooks and serves personally may show a low labour figure only because the owner's own time is not on the payroll, which hides a real cost. A restaurant in a prime location may accept a heavy overhead share in exchange for foot traffic. A kitchen built around premium ingredients may have a high food cost and lower labour.

Seasonality matters too. A summer terrace or a resort venue does not earn evenly through the year, so a single month can give a misleading split. Look at several months, or at a full year, before drawing conclusions.

Finally, the rule is silent on cash. A restaurant can reach a tidy 10% profit on paper and still struggle with timing, for example when suppliers need paying before the busy weekend income arrives.

Using better data to check your split

Applying the rule properly means knowing what you actually sell. If you run a digital menu, that data already exists. ChargeM3's analytics dashboard shows order trends and best-sellers, which tells you which dishes deserve the most careful costing because they make up most of your volume.

It does not replace your recipe costing or your accounting records; those stay in your own tools. What it does is make adjustments cheap once you have decided on them. Items and prices can be added, edited or removed in minutes, so a change you have worked out on paper can reach the menu the same day rather than at the next print run.

Frequently Asked Questions