The Weekly Restaurant P&L: A 20-Minute Discipline

The final night of a tighter P&L is not about finding a new leak. It is about the discipline that keeps the first four closed — because every line this series has walked will drift again the moment nobody is reading it. Food cost, labour, rent, the platform’s cut: none of them stays fixed by being fixed once. They stay fixed by being read.

This closes the Five Nights to a Tighter P&L series — a free five-night email course you can join from the toolkit — and, like each night, it stands alone.

Month-end is an autopsy

The standard operating rhythm — wait for the accountant’s pack, read it three weeks into the next month, wince, carry on — reviews the patient after the outcome is decided. A food-cost drift that begins in the first week of March has run six weeks or more by the time the March statement is discussed. The cause is cold: the supplier price moved, the portion crept, the promotion ran long, and nobody can now say which. Month-end is for reconciliation. Control happens weekly, or it does not happen.

The five lines

The weekly read is deliberately small — five lines on one page:

1. Sales for the week, against the same week last month and, once you have it, last year.
2. Food cost as a share of sales — purchases adjusted by the weekly count.
3. Labour as a share of sales — the fully loaded figure, not just wages.
4. Occupancy — the week’s share of rent against the week’s sales, so a heavy lease is never invisible between renewals.
5. The platform’s cut — commission, packaging and promotions on delivery, read against delivery sales, not blended away.

Anything more belongs in the monthly pack. The weekly page is small so that it actually gets read.

Read against the ceilings

Numbers without reference points are weather. Each line is read against the published bands GGB tests against — food at or under 32%, labour at or under 30%, prime cost at or under 62% — with occupancy and delivery read against your own ratio and contract, the way Night 3 and Night 4 set out. The bands are diagnostic working rules, not promises, and your concept has its own texture around them. What they give the weekly read is a verdict: within the band, or above it — and by how much, and in which direction it is moving. Three weeks of the same line drifting the same way is not noise. It is a cause with an address, and the profitability audit method is how it gets chased down.

One action, not five

Here is the part most weekly routines get wrong: they end in a list. Five observations, five intentions, and by Thursday the operation has absorbed none of them. The discipline is to end the twenty minutes with one action — chosen because it addresses the widest gap against the bands — with a name on it and a check the following week. One action a week is fifty-two real corrections a year, which is more than most turnarounds need. Owner attention is the scarcest ingredient in the building; the weekly read is how it gets spent where the money is.

The docket habit

Make it physical. Print the page — the same one-page docket, on the pass of your week: same day, same table, same twenty minutes, before service rather than after, when there is still a decision left in you. Sales at the top, the four cost lines under it, the one action written at the foot with a name and a date. Operators who keep the printed file gain something the screen never gives them: a spine of weeks, flipped through in thirty seconds, where a drifting line is visible as a trend before it is a crisis.

A second pair of eyes

A discipline this simple has one honest failure mode: reading your own numbers with your own assumptions, every week, alone. That is what the founder’s second opinion exists for — one page of your P&L, reviewed personally, free, with limited monthly capacity, returning a straight read of which line deserves your next month. And if the whole structure needs more than a read, the turnaround door is where that conversation starts.

Start where the series started: run the Restaurant Profit Leak Audit, print the docket it returns, and put twenty minutes in the diary for the same day next week. That is the whole discipline. It is smaller than the problem, which is exactly why it holds.