Restaurant Labour Cost: Schedule to the Curve

The second night of a tighter P&L belongs to labour, and it starts with an uncomfortable reframe: most labour problems are not pay problems. Pay is what the line shows; the schedule is what drives it. A roster built from habit will hold its shape for years after the demand that justified it has moved — and the P&L pays the difference every week.

This is the second read in 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.

The read: everything your people cost, against revenue

Labour cost is the fully loaded number — wages plus everything that rides with them — divided by revenue for the same period. Loaded is the operative word: in this region the gap between a salary and what that person actually costs the business is wide enough to distort any read that ignores it. The components are walked line by line in restaurant staffing cost per head; use that loaded figure, or the percentage flatters you.

The 30% ceiling

GGB reads labour against a published ceiling of 30% of revenue — and reads it beside food cost, because the two together form prime cost, with its own published ceiling of 62%. The pairing matters: a concept can legitimately run labour a little rich if food runs lean, and vice versa. What the structure cannot survive is both lines high at once, which is why the sum is the honest gauge and the components are where the work happens.

As with every band, the ceiling is diagnostic, not a promise: it tells you whether to look, never what you will find.

The roster is a habit

Here is how most rosters were actually built: someone constructed one in the opening month, it survived contact with reality, and it has been photocopied — with small mutations — ever since. New menu, new delivery mix, a mall footfall pattern that shifted two years ago: the revenue curve moved, the roster did not. Nobody decided this. That is precisely the problem — the schedule is the largest controllable cost in the business that nobody is currently deciding.

Draw the curve

The diagnostic costs nothing. Pull one ordinary week of covers — or orders, or revenue — by hour, from the POS. Draw it as a curve. Lay the roster over it. Two findings appear in almost every operation that runs this honestly:

• Hours stacked where the rush used to be — a heavy mid-shift from an era when lunch was the story, while the real peak has migrated to evenings or to delivery windows.
• The peak running thin — the half-hour either side of the true rush understaffed, which is where slow tickets, dropped tables and lost repeat visits are manufactured, while quiet afternoons carry people with nothing to sell.

The mismatch between the two lines is the leak, drawn in ink.

Productivity, not headcount

The lens that keeps this honest is revenue per labour hour: the period’s revenue divided by the labour hours scheduled to earn it. Headcount says how many people you employ; revenue per labour hour says what each scheduled hour is doing for the business. It is the difference between cutting and shaping. A blind cut lowers hours and revenue together and calls it discipline. Shaping moves hours from the flat parts of the curve to the steep parts — staggered start times, prep pushed into quiet windows, sections opened and closed with demand — and the same guests get served by a calmer line.

What to move first

Start where the curve says, not where the argument is easiest: the two or three widest gaps between scheduled hours and demand. Stagger arrivals in fifteen- or thirty-minute steps instead of shift-block starts. Put a name against the schedule each week — a roster nobody owns reverts to habit within a month. And read the two numbers weekly, labour percentage and revenue per labour hour, so the shape holds.

The Labour Productivity instrument runs this read for you — your labour line against the 30% ceiling and the productivity lens beside it — free, on-device, in a few minutes. Night 3 turns to the cost you signed before you ever opened: rent.