Most operators can recite the break-even formula and almost none use the result. Here is how to calculate your restaurant’s break-even point with honest cost classification — including the labor problem every guide skips — and how to turn it into a daily number your managers actually run the shift against.
September 8, 2026
Your restaurant break-even point is the sales level where you stop losing money — nothing more, nothing less. Every operator has heard of it, most can recite the formula, and almost nobody uses the result, because a number like “$85,700 a month” is true and useless at 4 p.m. on a slow Tuesday. This guide does the calculation properly — including the honest treatment of labor that most guides skip, because labor is neither fixed nor variable and pretending otherwise makes your break-even look better than it is — and then converts the answer into the form that actually changes decisions: a daily sales target, split by the days you are open, that a manager can compare against the tape before close.
Break-even answers one question: how much do I need to sell before a dollar of profit exists? That makes it the right tool for a handful of decisions — whether staying open Mondays makes sense, what a rent increase really costs you in required sales, how long a new location can run at half volume before it burns cash, whether a slow season is survivable. It is the wrong tool for judging menu items or comparing yourself to other restaurants, because it is built entirely from your own cost structure. Two restaurants with identical sales can sit on opposite sides of break-even. If you want the broader scoreboard, that is the territory of profit margins and your core KPIs; break-even is narrower and, used right, more actionable.
The formula itself is short. Break-even sales = fixed costs ÷ contribution margin ratio, where the contribution margin ratio is 1 minus your variable cost percentage. Worked example: say fixed costs are $30,000 a month and variable costs run 65% of every sales dollar. Contribution margin is 35%, so break-even is $30,000 ÷ 0.35 — about $85,700 a month. Every dollar of sales past that point contributes 35 cents of profit; every dollar short of it costs you 35 cents. The formula is the easy part. The number is only as honest as the cost classification behind it, which is where most break-even calculations quietly go wrong.
Fixed costs are the bills that arrive whether or not anyone eats: rent, insurance, most utilities, software subscriptions, loan payments, salaried management. Variable costs scale with sales: food and beverage — your food cost percentage — packaging, card processing, delivery costs. Then there is labor, which most guides shove into one bucket or the other and which belongs in neither. A skeleton crew opens the doors even on a dead day — that portion is fixed. The extra bodies you schedule when sales justify them are variable. Splitting it honestly matters more than any other line, because labor is one of your two biggest costs, and misclassifying it moves your break-even by thousands. Treat all labor as variable and break-even looks comfortably low — right up until a slow month proves the skeleton crew was a fixed bill all along.
A monthly break-even is a finance number. Divide it by your open days and it becomes an operating number — and this is the step almost every break-even guide skips. If break-even is $85,700 and you are open 26 days, the doors cost about $3,300 a day to justify. Now the number does work: a manager reading the daily sales report knows whether today carried its weight, and a string of Mondays at $1,900 against a $3,300 target is not a feeling — it is a case, in writing, for shorter Monday hours, a Monday-specific promotion, or closing Mondays and letting the fixed costs spread across six days instead of seven. You can go one level finer and weight the target by your historical sales mix — if Saturday does double a Tuesday, give Saturday a $5,000 share and Tuesday a $2,000 share — so nobody panics about a Tuesday that was never going to do Saturday volume.
| Monthly fixed costs | Variable cost % | Break-even sales / month | Per open day (26 days) |
|---|---|---|---|
| $20,000 | 60% | $50,000 | about $1,925 |
| $30,000 | 65% | about $85,700 | about $3,300 |
| $45,000 | 62% | about $118,400 | about $4,550 |
| $70,000 (multi-unit) | 63% | about $189,200 | about $7,280 |
These rows are arithmetic, not benchmarks — your fixed costs and variable percentage are the inputs that matter, and they come from your own P&L, not from anyone’s industry average. If you run more than one location, calculate break-even per location: a strong store can subsidize a weak one for years inside a blended number, which is exactly the kind of thing a multi-location view exists to surface.
There are only two levers — lower fixed costs or widen the contribution margin — but each has several handles. On the fixed side: renegotiate rent at renewal (the break-even math is your evidence), audit subscriptions annually, and consolidate the software stack — several separate tools for POS, online ordering, loyalty and scheduling usually cost more per month than one platform. On the margin side: menu prices that reflect current ingredient costs, portion specs that are actually followed, and shifting delivery volume from commission-charging marketplaces toward commission-free direct ordering, which converts a variable cost straight into contribution margin on every shifted order. A two-point margin improvement on the $30,000 example above moves break-even from about $85,700 to about $81,100 — over $4,500 a month of breathing room without selling one extra cover.
Break-even is not a plaque you engrave once. Rent renewals, a new loan payment, a lease on new equipment, minimum-wage changes, and ingredient repricing all move it — and most of them move it up. A good habit is recalculating quarterly and after any structural change, then updating the daily target your managers run against. The operators who get real value from this number treat it the way a kitchen treats par levels: a living reference, checked against reality on a schedule, not a business-plan artifact from the year they opened.
Break-even sales = fixed costs ÷ contribution margin ratio, where the contribution margin ratio is 1 minus your variable cost percentage. A restaurant with $30,000 in monthly fixed costs and variable costs at 65% of sales has a 35% contribution margin and breaks even at about $85,700 a month. Divide by your open days for the daily target.
Both, and splitting them honestly is the most important classification in the whole calculation. The skeleton crew you would schedule on your slowest open day is a fixed cost — those hours happen regardless of sales. Hourly labor scheduled above that baseline scales with volume and is variable. Treating all labor as variable understates your true break-even.
Divide your break-even sales figure by your average check. If break-even works out to $3,300 a day and your average check is $30, you need about 110 covers a day. Weight it by daypart or day of week using your own sales history so slow days carry a fair share rather than an impossible one.
Quarterly, and immediately after any structural change: a rent increase, a new loan or lease payment, a minimum-wage change, a menu reprice, or adding or cutting operating days. The formula takes minutes once your fixed and variable costs are classified; keeping the daily target current is what makes managers trust it.