Restaurant Break-Even Analysis: The Real Formula and 5 Concept Examples

Written by The Pragmatic CFO. 15+ years running restaurant P&Ls.

Last updated July 30, 2026.

Break-even for a restaurant is the sales volume where contribution margin covers fixed cost. The formula is fixed cost divided by (1 minus variable cost as a percentage of sales). The textbook version misses the reality that some of your “fixed” costs move with volume and some of your “variable” costs do not.

The formula operators actually use

Standard textbook break-even looks like this:

Break-even sales = Fixed costs / (1 – Variable cost %)

That formula is not wrong. It is incomplete. In a real restaurant, prime cost (food, beverage, and labor) is not purely variable, and rent and utilities are not purely fixed. If you treat them as if they were, your break-even number is off by 8 to 15 points of sales, which is the difference between a plan that works and a plan that closes a location.

The version that actually holds up:

True break-even sales = (Fixed cost + Semi-fixed labor floor + Occupancy) / (1 – COGS % – Variable labor % – Variable operating %)

Break out labor into a scheduled floor (managers on salary, minimum crew you cannot cut without closing the shift) and variable hours (servers, line cooks who flex with covers). Do the same with utilities: base electric and gas load exists whether you open or not, incremental load moves with volume.

For the mechanics of how these lines actually roll up on your monthly statement, see how to read a restaurant P&L.

Why the wrong break-even number ruins decisions

Operators who use the textbook formula underestimate break-even in slow months and overestimate it in busy months. Both errors cost money. In slow months, they think they are close to break-even when they are actually $8,000 to $15,000 short, so they do not cut labor aggressively enough. In busy months, they think they need $180,000 to break even when the real number is $160,000, so they under-invest in marketing or promotions that would have paid back.

The other reason this matters: banks and investors calculate break-even the correct way, and if your operating budget is built off the textbook version, your covenants will trip in a quarter you did not expect.

What counts as truly fixed, semi-fixed, and variable

Category	Line items	Behavior
Fixed	Rent, base insurance, property tax, loan payments, salaried GM	Same dollars whether sales are $80K or $180K
Semi-fixed	Salaried sous chef, kitchen manager, base utilities, minimum crew shifts, software subscriptions	Stepped. Fixed inside a volume band, jumps at the next threshold
Variable	Food COGS, beverage COGS, hourly service and prep labor, credit card fees, delivery commissions, supplies	Move proportionally with sales

Get the categorization right and the math falls out. Get it wrong and you will chase the wrong lever every month.

Concept example 1: QSR unit doing $1.4M annual

Fixed monthly cost: $18,500 (rent $8,500, insurance $1,200, loan $3,800, GM salary $5,000).
Semi-fixed monthly: $9,200 (assistant manager, minimum crew, base utilities, software).
Variable cost ratio: 62% (COGS 28%, hourly labor 26%, cards 2.5%, supplies 3%, other 2.5%).

Break-even = ($18,500 + $9,200) / (1 – 0.62) = $27,700 / 0.38 = $72,900 per month, or $875K annual.

The unit clears break-even by $525K a year. That headroom is what gives QSR its resilience. See food cost percentage by concept for the underlying COGS benchmarks.

Concept example 2: Fast casual doing $2.1M annual

Fixed monthly: $28,000. Semi-fixed monthly: $14,500. Variable cost ratio: 61% (COGS 30%, hourly labor 24%, cards 2.5%, delivery commissions blended 2%, supplies 2.5%).

Break-even = ($28,000 + $14,500) / 0.39 = $108,900 per month, or $1.31M annual.

The fast casual clears break-even by $790K but is much more exposed to labor cost creep than QSR. A 200 bps move in hourly labor pushes break-even to $1.42M and eats a third of the profit cushion.

Concept example 3: Full service casual doing $3.4M annual

Fixed monthly: $42,000. Semi-fixed monthly: $22,000. Variable cost ratio: 63% (COGS 30%, hourly labor 28%, cards 2.5%, supplies 2.5%).

Break-even = ($42,000 + $22,000) / 0.37 = $173,000 per month, or $2.08M annual.

Full service casual has the largest absolute fixed cost base and the tightest variable margin. Break-even is 61% of sales, versus 62% for fast casual and 63% for QSR when scaled. The problem is not the ratio, it is that a bad six weeks blows through the smaller nominal buffer faster.

Concept example 4: Bar and lounge doing $1.8M annual

Fixed monthly: $22,000. Semi-fixed monthly: $10,000. Variable cost ratio: 48% (beverage COGS 22%, hourly labor 20%, cards 3%, supplies 3%).

Break-even = ($22,000 + $10,000) / 0.52 = $61,500 per month, or $738K annual.

Beverage-forward concepts have the best contribution margins in the industry and correspondingly low break-even ratios. The catch is guest count volatility. A bar generates 55% of its weekly revenue in three shifts. Weather, sports, or a competing venue opening across the street can move break-even coverage from 2.4x to 1.1x inside a quarter.

Concept example 5: Coffee shop doing $900K annual

Fixed monthly: $11,500. Semi-fixed monthly: $6,000. Variable cost ratio: 55% (COGS 32% including milk and pastry, hourly labor 18%, cards 3%, supplies 2%).

Break-even = ($11,500 + $6,000) / 0.45 = $38,900 per month, or $467K annual.

Coffee has excellent margins on drinks and terrible margins on the food it needs to sell to justify staying open past 11 a.m. The break-even model is stable, but every incremental dollar of food revenue is worth roughly half of an incremental dollar of drink revenue. Menu mix is the whole game.

How to run this analysis on your own P&L in 30 minutes

1. Pull your last 12 months of financials. Not last month. You need the seasonal pattern.
2. Split every line item into fixed, semi-fixed, or variable. Do not eyeball it. Look at how the dollars actually moved between your slowest and busiest months.
3. Compute the ratio for each variable line as a percentage of sales. Average across the 12 months.
4. Sum fixed and semi-fixed dollars. That is your monthly commitment.
5. Divide by (1 minus your total variable ratio). That is your true break-even.
6. Compare it against your worst month. If your worst month is inside your break-even number, you have a cash problem coming.

Pair this with a 13-week cash flow forecast and a running prime cost check and you have the three numbers that predict whether a location survives the next six months.

The break-even lever that is hiding in plain sight

Most operators try to move break-even by attacking COGS. That is a slow lever. A 100 bps improvement in COGS moves break-even by roughly 2 to 3% of sales. A single lease renegotiation, done right, can move fixed cost by 12 to 18% and drop break-even by 6 to 9 points. If you have not renegotiated in the last 24 months, that is where the money is.

The second lever is menu mix. Shifting 4 points of mix from a 45% contribution margin item to a 68% margin item moves your blended variable ratio by 90 bps, which drops break-even by roughly 2% of sales. Not glamorous, but it compounds every month.

FAQ

What is a good break-even ratio for a restaurant?

Break-even between 55% and 65% of sales is normal for QSR and fast casual. Full service casual runs 60% to 70%. Fine dining and bar-heavy concepts can be under 50%. Above 75% of sales, you are one bad month from a cash crisis.

How is break-even different from cash break-even?

P&L break-even ignores loan principal and capital expenditure. Cash break-even adds those in. For most independent operators, cash break-even is 4 to 8 points of sales higher than P&L break-even. That gap is why profitable restaurants still run out of money.

Should I include owner salary in fixed cost?

Yes, at market rate for what you actually do. If you would need to hire a GM at $75K to replace yourself, put $75K in the fixed line. Otherwise your break-even number lies about the true cost of running the location.

How often should I recalculate break-even?

Every quarter, and after any significant change to rent, wages, or menu prices. Break-even drifts. What was $128K last year can be $141K this year without anyone noticing until a slow month reveals it.

What is the fastest way to lower break-even?

Lease renegotiation, then labor scheduling by daypart, then menu mix. In that order, by dollar impact. See the prime cost recovery playbook for the scheduling work.

For the full 2026 benchmarks, see our State of Restaurant Finance report.