Restaurant break-even calculator

A restaurant's break-even math runs on covers, not generic "units," and two things most break-even calculators ignore actually decide whether the number is real: the average check has to be blended across day parts and channels, not taken from the menu, and the room itself has a hard ceiling on how many covers it can physically turn. Neither shows up in a generic fixed-cost-over-margin formula.

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Prime cost — food cost plus labor cost, combined, as a percentage of revenue — is the single number most restaurant operators watch more closely than any other. It rolls the two largest cost categories into one figure that's fast to check against a target, and it moves in the same direction as break-even: a rising prime cost means a shrinking contribution margin, which pushes the break-even covers figure higher even if nothing else about the business has changed.

Prime cost and break-even answer related but different questions. Prime cost tells you whether the cost structure itself is healthy, as a percentage; break-even translates that structure into an absolute number of covers a specific restaurant, with its specific rent and specific menu prices, needs to serve. A restaurant can have an excellent prime cost and still sit dangerously close to break-even if rent is high relative to its average check, which is exactly why both numbers are worth tracking rather than either alone.

Fixed costs for a restaurant are dominated by rent and salaried labor, but rarely just those two:

Leaving out target owner salary is the single most common reason a restaurant break-even calculation understates the real number — a business that only covers rent and payroll but not the person running it isn't actually break-even, it's a job the owner is quietly subsidizing every month.

Build this list once from actual bank and card statements rather than memory — smaller recurring charges (a second software tool, pest control, music licensing, a smallwares and equipment-repair reserve) are easy to forget individually and add up to a meaningful gap between a break-even estimate built from memory and one built from real numbers.

Almost no restaurant collects one price from every guest. Using a single menu price, or the price of the signature entrée, in the break-even formula overstates real revenue per cover the moment lunch, bar seating, and takeout coexist with full dinner service — the fix is a covers-weighted blend, not a simple average of the menu's listed prices.

$24 blended average check — not $30, the dine-in table-service price alone — is the number that belongs in the break-even formula. Using the higher unweighted figure instead would understate the true covers count needed by a meaningful margin, since it silently assumes every guest orders and pays like a full table-service dinner, which the actual service mix doesn't reflect.

Blended average check also drifts on its own over time, independent of any deliberate menu decision — a slow shift toward bar and counter seating as walk-in habits change, a growing takeout share that was never part of the original concept, or seasonal patio seating that skews the mix for part of the year. Recalculating the blend quarterly against actual covers by service style, not the menu's price list, catches this drift before it quietly raises the real break-even count above what the last calculation showed.

Variable cost per cover scales with covers served, unlike the fixed costs above:

The line that most often gets miscategorized is hourly labor. A salaried kitchen manager or GM belongs in fixed costs regardless of covers served; hourly line cooks and servers, whose shifts scale with expected volume, belong here in variable cost. Filing hourly staff as a fixed cost is a common way this calculation quietly understates how much each additional cover actually costs to serve.

None of these numbers need to be precise to the cent — they need to be built from real food invoices, payroll, and processing statements rather than round guesses. A variable cost per cover that's off by even $1-2 shifts the resulting break-even count meaningfully once fixed costs are in the thousands, since that error compounds across every cover the calculation counts.

A restaurant running meaningful delivery volume through a third-party platform faces a materially different variable cost per cover on that channel — the platform's commission (commonly 15-30% of the order) stacks on top of food cost and packaging. Blending dine-in and delivery into one break-even number can hide that the delivery channel alone might need a much higher covers count, or a higher menu price on that channel, to break even on its own.

Delivery's contribution margin is still positive here, so it's not a loss on paper — but it's 39% versus dine-in's 64%, meaning delivery covers contribute roughly 61 cents on the dollar of what a dine-in cover does. If kitchen and staffing capacity is shared between the two channels, every delivery cover that displaces a dine-in cover the restaurant could otherwise have served is a net reduction in total contribution margin, even though delivery revenue looks like pure upside on the top line.

Delivery is a clear win when it fills genuinely idle kitchen capacity — slow weeknights, off-peak hours — rather than competing with dine-in demand for the same cooks and the same burners during a Friday dinner rush. Running the calculator above with delivery's own check and variable cost, separately from dine-in, is what surfaces whether a given delivery volume is actually helping or quietly eating into higher-margin covers the kitchen could otherwise have served.

Cost-based break-even math has no idea how many tables fit in the dining room or how fast they turn. A 45-seat restaurant open for dinner five nights a week (closed Monday and Tuesday), averaging 1.5 table turns per seat per night, seats 45 × 1.5 = 67.5 → roughly 68 covers a night. Across 5 nights a week and about 4.3 weeks a month, that's 68 × 5 × 4.3 ≈ 1,462 covers of monthly capacity — only about 38 covers above the 1,424-cover break-even calculated earlier.

That gap matters more than it might look. A 2.6% buffer between capacity and break-even means a single closed night for weather, a slow Thursday, or one short-staffed shift that limits how many tables can be turned can erase the entire margin for the month — not because the cost structure is wrong, but because the room simply doesn't have enough physical room to absorb a bad night once break-even has already eaten most of its capacity.

The fix has to come from one of a few levers: open an additional night, add a lunch service to capture currently idle daytime hours, increase turns per seat through faster table service or a shorter average dining time, or raise the blended average check so fewer covers are needed to hit the same revenue target. Checking calculated break-even against a real seat-and-turn ceiling before committing to a lease or a service schedule is a step every cost-based calculator, including the one above, will silently skip unless it's run by hand.

Working the fix through numbers: adding a sixth night at the same 68 covers/night adds roughly 68 × 4.3 ≈ 292 covers of monthly capacity, taking the restaurant from 1,462 to about 1,754 — a comfortable 330-cover buffer (23%) above the 1,424-cover break-even, rather than the razor-thin 38-cover buffer it started with. Whether that's achievable depends on whether the kitchen and service staff can actually absorb another night, which is a staffing question the break-even formula itself has no way to answer.

Run your own restaurant numbers above, free, or see break-even worked for four other industries side by side in break-even analysis examples.