Fixed and variable costs, the formula, a worked example in dollars and covers, and the two levers that bring the number down.
By Rob Bruni, founder of OpsEdge Hospitality, twenty years running restaurants, bars, clubs and resorts. Updated November 2026.
Break-even is the sales level where a restaurant stops losing money and starts making it. Every dollar below it costs you something, every dollar above it drops partly to the bottom line. Most operators have a feel for it and almost none have the number. This guide covers how to separate fixed and variable costs, the formula, a worked example in dollars and in covers, and what the number is good for once you have it.
A restaurant has costs that show up whether or not anyone walks in (rent, insurance, salaried managers, loan payments) and costs that show up only when a guest orders (the food on the plate, the hourly labor to make and serve it). Break-even is the point where the sales from guests cover both kinds of cost exactly. Profit is zero. One more guest and you are profitable. One fewer and you are not.
It matters because it turns a vague worry ("are we doing okay this month?") into a daily target. If break-even is $3,400 a day and Tuesday did $2,900, you know what Tuesday cost you. If Saturday did $6,800, you know roughly what it made. Managers who know the number make different decisions about hours, comps and promotions than managers who do not.
Costs that do not change with sales in the short run. Rent or mortgage, property tax, insurance, salaried management, loan payments, equipment leases, base utilities, software subscriptions, accounting, licenses. Add them up for a month. Most independents land between $25,000 and $90,000 a month depending on size and market.
Costs that rise and fall with every sale. Food and beverage cost, hourly labor including its payroll taxes, credit card processing, paper and packaging, delivery platform fees. Express these as a percent of sales. For a full service restaurant, food and beverage together usually run 28 to 34 percent, hourly labor and taxes 20 to 26 percent, cards and supplies 3 to 5 percent. Together that is 55 to 65 percent of sales.
Some costs are a mix. Utilities have a base and a usage part. Hourly labor has a minimum crew you need even on a dead night. Put the base in fixed and the rest in variable. Perfect is not the goal; consistent is.
Contribution margin is what is left of each sales dollar after variable costs, which is the part available to pay fixed costs. If variable costs are 62 percent of sales, every dollar contributes 38 cents toward rent, salaries and profit.
That is the whole thing. Monthly fixed costs divided by the share of each dollar left after variable costs gives the monthly sales you need to land at zero profit. Divide by operating days for the daily number. Divide by average check for covers.
Two variations worth knowing:
A 90-seat full service restaurant, open 6 days a week
Monthly fixed costs: rent $14,000, salaried managers and chef $19,500, insurance $1,800, loan and equipment leases $3,200, base utilities, software, accounting and licenses $4,500. Total fixed: $43,000
Variable costs: food and beverage 31%, hourly labor with taxes 23%, cards, paper and supplies 4%. Total variable: 58%. Contribution margin: 42%
Break-even sales: $43,000 ÷ 0.42 = $102,400 a month
At 26 operating days: $3,940 a day. At a $42 average check: 94 covers a day, or about 2,440 a month.
Now add a target. The owner wants $10,000 a month in profit. ($43,000 + $10,000) ÷ 0.42 = $126,200 a month, or $4,850 a day, or 115 covers. The gap between 94 and 115 covers a day is the whole business plan.
Notice how sensitive this is to contribution margin. If variable costs creep from 58 to 62 percent (a couple of points of food cost and a couple of labor), break-even rises from $102,400 to $113,200. Four points of cost control moved break-even by almost $11,000 a month with nothing else changing. That is why the cost guides on this site matter: every point of prime cost you hold is a lower hill to climb every single month.
The monthly number is for the owner and the accountant. Managers need it in a form they can use at 4 p.m. on a Tuesday.
| Form | How to get it | What it is for |
|---|---|---|
| Dollars per day | Monthly break-even ÷ operating days | The daily sales target on the manager log |
| Covers per day | Daily break-even ÷ average check | Reservation and floor planning, server sections |
| Dollars per hour | Daily break-even ÷ operating hours, weighted by daypart | Deciding whether a daypart is worth opening |
| Days to break even | Monthly break-even ÷ average daily sales | How many days of the month work for the landlord, how many for you |
The last one is the one owners remember. If break-even is $102,400 and average daily sales are $4,600, the first 22 days of a 26-day month pay the bills and the last four are profit. Lose two weekend nights to weather and the month is gone.
The free break-even calculator turns your fixed costs and contribution margin into the sales you need per month, per day and per cover, adds a profit target, and shows how many days of the month work for you. No signup.
Open the break-even calculator All five free calculatorsThere are only two levers, and the second one is the one most operators ignore.
Rebuild the number every quarter. Fixed costs change on renewal dates, variable costs change with every price move, and a break-even that is a year old is a guess. The Restaurant P&L and Prime Cost Dashboard in our catalog has the break-even sheet built in, and the P&L guide covers how the fixed and variable lines fit together on the statement.
The $495 Remote Prime Cost Review looks at four weeks of your real sales, purchases, inventory and payroll and shows you the three biggest leaks in dollars, with a 60-minute call to walk through the fixes. Fully remote, any US operation.
See the Prime Cost System On-site servicesBreak-even is the sales level at which total sales equal total costs, so profit is zero. It is worked out as monthly fixed costs divided by contribution margin percent (100 percent minus variable cost percent), and is usually expressed per month, per day and in covers.
Add up monthly fixed costs (rent, salaries, insurance, loans, base utilities). Work out variable costs as a percent of sales (food, beverage, hourly labor, cards, supplies). Contribution margin is 100 minus that percent. Break-even sales equals fixed costs divided by contribution margin. Divide by operating days for the daily target and by average check for covers.
It depends entirely on fixed costs and margin, but a 90-seat full service independent with $43,000 of monthly fixed costs and a 42 percent contribution margin breaks even around $102,000 a month, roughly $3,900 a day or 94 covers a day at a $42 check.
Mostly variable, because hours should move with sales. Treat the minimum crew you need on the slowest shift as fixed and everything above it as variable. Salaried management is fixed.
Quarterly, and whenever a fixed cost changes (a lease renewal, a new manager, a loan) or variable costs move more than a point. A break-even number that is a year old is not reliable.
Two levers: lower fixed costs (lease, salaries, subscriptions, debt) or raise contribution margin (food and beverage cost, hourly labor scheduled to forecast, average check, card and delivery fees). Margin is usually the faster and larger lever.