Restaurant break-even, in covers per day
A break-even expressed in dollars is an accounting fact. Expressed in covers per day, it's something a manager can act on before service.
Break-even is the sales volume at which you stop losing money. The calculation is simple; the useful part is converting it into a number your team can actually feel.
Splitting costs
Every cost is variable, fixed, or a mix. Variable costs move with sales: food and beverage, hourly labor and the payroll taxes on it, card processing, third-party delivery commissions, paper and packaging.
Fixed costs don't care how many covers you did: rent, CAM, property tax, insurance, management salaries, most utilities, marketing, repairs, software and professional fees.
The gray areas are real. Management salaries are fixed until you're open seven days and need a second salaried manager. Utilities have a base charge plus usage. For a break-even you can live with, treat salaried labor and utilities as fixed and don't lose a day to precision that won't change the answer.
The calculation
Contribution margin is the share of each sales dollar left after variable costs:
Contribution margin = 1 − (variable costs ÷ total sales)
Then:
Break-even sales = fixed costs ÷ contribution margin
Work it through. A restaurant does $1.5M with $840,000 of variable costs, so its contribution margin is 44%. Fixed costs are $520,000. Break-even sales are $520,000 ÷ 0.44 = $1,181,818.
Into covers
Divide by your average check, then by the days you're open in a year:
Covers per day = break-even sales ÷ average check ÷ (days open × 52)
At a $38 average check, open six days: $1,181,818 ÷ 38 ÷ 312 = 100 covers a day. That's a number a general manager can hold in their head and compare against the floor at 8pm. "We need $1.18 million" is not.
Margin of safety
The gap between where you are and break-even, as a percentage:
Margin of safety = (actual sales − break-even sales) ÷ actual sales
Our example running at $1.5M has a 21% margin of safety. Sales can fall 21% before it's underwater.
Under 10% is a bad winter away from trouble, and worth knowing before the winter rather than during it. Above 30% you have room to invest. This is the single most useful number to recalculate when you're deciding whether to take on debt, since it tells you how much cushion the business has for a payment that doesn't flex.
Two results that mean something else
Break-even far above current sales. If the arithmetic says you need three times your current volume, that isn't a sales target. It's the math telling you the margin left after variable costs is too thin to carry your fixed base. Fix the cost structure before you chase the volume.
No break-even at all. If variable costs exceed sales, the contribution margin is negative and there's no volume that gets you there — every additional dollar of revenue costs more than a dollar to produce. Growth makes it worse, not better. This is rarer than it sounds, and always a pricing problem rather than a traffic problem.
Seasonality
An annual break-even hides the months that hurt. A Willamette Valley restaurant doing 40% of its year between June and September has a February that loses money as a matter of structure, not of management.
Run it monthly, using each month's fixed costs against that month's expected sales, and the picture changes usefully: you learn how much the strong months need to bank to carry the weak ones. That figure is the real answer to how much cash the business should be holding, and it's a better basis for a line of credit conversation than an annual average that describes no actual month.
Testing a lease or a loan
This is the highest-value use of the calculation and the one most often skipped. Any fixed monthly obligation raises your break-even by its full amount divided by your contribution margin.
At a 44% contribution margin, a $3,000 monthly lease payment adds $6,818 a month in required sales — roughly $82,000 a year, or six additional covers a day at a $38 check. That's the honest price of the equipment, and it's the number to weigh against what the equipment earns.
The same arithmetic applies to a rent increase at renewal, a new salaried position, or a software subscription. Each is small on its own; each raises the floor you clear before earning anything.
Using it
Break-even isn't an annual exercise. Recalculate it when rent changes, when you add a salaried position, when you take on debt, and before you sign anything with a fixed monthly payment — because every one of those raises the number of covers you need before you earn a dollar, and the increase is invisible until you do the arithmetic.
The daily version is the one that changes behavior. A manager who knows the room needs 100 covers before it makes money runs a different shift than one who knows only that sales were soft.