Break-even analysis for small business: the formula, the worked examples, the daily number that defines survival.

Almost every small-shop owner can quote their revenue. "We did €18,000 last month." Almost none can quote their break-even point. "I think we need… maybe €13,000? Or €15,000? I am not sure." That gap is the difference between running a business and gambling on one. Break-even is the revenue level at which total income equals total cost — the floor below which you lose money and above which you start to build. It is the single most important number an owner-operator can know about their own shop, and the one most owners have never sat down to calculate. This post derives the formula in plain language, walks through three sector-by-sector examples (a small cafe, a Shopify store, a two-chair salon), shows the three levers that actually move the number, and explains why a quarterly break-even check is roughly the same as no check at all. By the end you will know how to compute yours — and how to keep it honest as the costs underneath it move.

TL;DR

• What it answers: "How much revenue does this shop need every month to stop losing money?"
• The formula: Break-even revenue = Fixed costs ÷ Contribution margin %.
• Contribution margin: what is left of each euro of revenue after the variable costs of producing that euro.
• Two units: euros (monthly revenue target) and units (customers, transactions, orders) — both useful, in different conversations.
• The honest version: includes your own salary at market rate, not zero. Otherwise the number flatters you.
• The danger: break-even is not a target — it is the floor. The target sits above it.

What break-even actually means

Break-even is the revenue level at which total income exactly equals total cost. At that point, profit is zero. The shop is not losing money. The shop is not making money. The lights stay on, the rent gets paid, the staff get paid, the owner gets paid (if they have included themselves), and the books close at neither plus nor minus. One more sale and the shop is in profit. One less and the shop is in loss.

Three zones, three different operational realities:

• Below break-even: the shop is losing money. Every day you stay open at this run rate, the bank balance drops. Operational decisions made here — "let us do a discount campaign to drive volume" — usually deepen the hole, because below-break-even volume means more variable cost without enough contribution to clear the fixed slice.
• At break-even: the shop is treading water. Bills get paid, owner gets paid, nothing is built. No reinvestment, no reserve, no buffer for a slow week. This is the position most under-performing small shops drift into and stay in for years without realising it.
• Above break-even: the shop is building. Every euro of revenue above break-even is contribution margin that becomes profit — the cash that funds reserves, reinvestment, the owner taking a holiday without losing money for the week they were gone.

Owners who do not know their break-even point cannot tell which zone they are in. They feel busy on a Saturday and assume the month is fine. They feel quiet on a Tuesday and assume one good weekend will fix it. The arithmetic is sitting underneath those feelings and quietly disagreeing. The whole purpose of the break-even calculation is to replace the feeling with a number, and then to check actual performance against it on a cadence faster than quarterly.

The break-even formula, derived from first principles

The textbook version of break-even is two lines: "Break-even = Fixed costs ÷ Contribution margin." That is correct and almost useless on its own, because most owners do not have an intuition for what contribution margin means or how to compute it from their actual P&L. Here is the derivation in plain language.

Start with the basic profit equation that holds for every shop on the planet:

Profit = Revenue − Variable costs − Fixed costs

Break-even is the point at which profit is zero. Set Profit = 0 and rearrange:

0 = Revenue − Variable costs − Fixed costs
Fixed costs = Revenue − Variable costs
Fixed costs = Revenue × (1 − Variable cost ratio)

The expression in brackets is what accountants call contribution margin % — the fraction of every euro of revenue that survives after paying the variable costs of producing that euro. Substitute it in and solve for revenue:

The contribution margin is the half of the formula owners get wrong most often. It is not the same as gross margin in every business — for a service business with thin product costs it nearly is, but for an e-commerce store with packaging, shipping shortfall, per-order fulfillment and card fees, contribution margin can be 15–25 percentage points lower than gross margin. The rule that always holds: contribution margin includes every cost that scales with the sale, not just the cost of the goods themselves.

A second way to read the formula: contribution margin per euro of revenue tells you how much of each euro is "left over" to throw at fixed costs. At 65%, each euro of revenue contributes €0.65 toward covering fixed costs. To cover €6,000 of fixed costs, you need €6,000 ÷ €0.65 = €9,231 of revenue. The arithmetic is identical; the mental model of "contribution stacking up against the fixed wall" is what makes the number intuitive enough to act on.

Two units to measure break-even in

Break-even can be expressed in two units, and both are useful in different conversations. The first is revenue (euros) — the monthly turnover the shop needs to clear. The second is units sold (customers, transactions, orders, services) — the number of discrete sales it takes to reach that turnover at the typical price.

The conversion is mechanical: break-even units = break-even revenue ÷ average ticket. A cafe that needs €9,231/month at a €4.20 average ticket needs 2,198 tickets a month — roughly 73 a day across a 30-day month, or about 85 a day across the 26 trading days a six-day cafe actually opens. A salon that needs €6,000/month at a €72 average service needs 84 services a month — about 3.2 per day across 26 trading days.

When each unit is more useful:

For owner-operators, both numbers belong on the wall. The monthly revenue target is for thinking. The daily unit target is for doing. Most shops we work with print the daily number on a sticky note next to the till or the booking screen — it is what the team actually manages against, hour by hour.

Worked example: a small cafe

A 16-seat specialty cafe in a mid-sized European city. The owner runs the till, one part-time barista does mornings, the owner does afternoons solo. Six trading days per week (closed Mondays). Here is the realistic monthly fixed-cost stack:

That is the numerator. Now the contribution margin. Average ticket is €4.20 — a blend of espressos at €2.80, flat whites at €3.80, filter coffees at €3.20, pastries at €3.50, and the occasional lunch plate at €11. Variable cost per ticket averages €1.47 — about 35% of revenue, dominated by COGS (beans, milk, pastries, food) at roughly €1.30 per ticket and card fees + packaging at €0.17. So contribution margin = (€4.20 − €1.47) ÷ €4.20 = 65%.

Plug into the formula:

Two things to notice. First: the daily number — 73 to 85 tickets per day — is the operational target the cafe can actually manage against. If the till crosses 85 tickets by 4 p.m. on a Tuesday, the rest of the day is contribution toward profit. If it is still at 50 tickets by close, the day was a loss regardless of how busy the lunch rush felt. Second: the owner draw in this stack is €2,400 — below market for a full-time owner-operator covering till, ordering, opening, closing and reception. The honest version of this calculation uses a €3,200 owner salary, which lifts fixed costs to €6,800 and break-even revenue to €10,462/month — about 13% higher. The "looks profitable" version and the "actually profitable" version are not the same number.

For a deeper unpack of why cafe owners often discover their margin is thinner than they thought, see why is my cafe not making money — it walks through the same vertical from the opposite direction (losses backwards into the formula). The break-even calculator at break-even calculator for cafes runs the math live with your own numbers in 60 seconds.

Worked example: a Shopify store

A small DTC home-goods store, two years in, owner-operated with a 10-hour-per-week VA. Ships from a small warehouse on the outskirts of the city, 168 orders per month average across the last 90 days. Here is the monthly fixed-cost stack:

AOV is €55 gross. Variable cost per order breaks down as: COGS €19.25 (35% of gross), packaging + per-order materials €2.40, fulfillment labour at the warehouse €3.80, shipping cost net of customer-paid shipping €2.10, card processor fees at 1.8% on the full order €0.99, blended CAC across Meta + Google + content €6.50. Total variable cost per order: €35.04. Contribution per order: €55 − €35.04 = €19.96. Contribution margin: €19.96 ÷ €55 = 36%. (For the structurally more rigorous version that strips VAT first and treats CAC as a contribution-reducing line, see the dedicated post on break-even AOV for ecommerce; here we use the simpler revenue-based break-even framing.)

Two patterns are worth surfacing. First: the store feels close. 168 vs 177 is psychologically nothing, and most owners in this position keep pushing — "next month will be the breakthrough" — without realising that "close to break-even" can persist for two or three years while the personal savings drain to fund the gap. Second: the structural fix is rarely volume. Pushing from 168 to 177 orders takes ad spend, which increases CAC, which lowers contribution margin per order, which raises break-even further. The trap is real. The way out is one of the three levers below — almost always a mix of raising AOV, dropping fixed costs, and improving margin — not "more orders at the same unit economics."

For the structural deep-dive into AOV-specific break-even (with CAC handled as a contribution-margin reducer rather than a fixed cost), see break-even AOV for ecommerce. The AOV break-even calculator runs the more rigorous version live.

Worked example: a salon

A two-chair salon, owner works one chair, employs one stylist on a €2,200/month flat salary. Closed Sundays and Mondays — 22 trading days per month. Monthly fixed-cost stack:

Average service ticket is €72 — a blend of €42 cuts, €110 colour, €58 blow-dries, occasional €180 transformations. Variable cost per service averages €21.60 — about 30% of ticket, dominated by product cost (colour, developer, treatment products used per service) at €9 and commission to the employed stylist above her base wage on services she delivers at roughly €12.60 blended. Contribution per service = €72 − €21.60 = €50.40. Contribution margin = €50.40 ÷ €72 = 70%.

Salons typically have the highest contribution margins of the four small-shop verticals because labour is captured as fixed cost (salary) and product cost per service is thin. The flip side: capacity is hard-capped at chair-hours, and unfilled chair-hours cannot be sold tomorrow. A salon below break-even almost always has a utilisation problem (no-shows, gaps in the booking calendar, slow Tuesdays) rather than a pricing or COGS problem. For the deeper version that walks through pricing scenarios, capacity expansion math and the owner-salary trap by chair, see how many clients does a salon need to break even.

Why "fixed" includes more than rent

The most common error in small-shop break-even calculations is an under-counted fixed-cost numerator. Owners list rent, payroll, maybe insurance — and stop. The break-even number that pops out is flatteringly low. The shop "should" be profitable. Reality disagrees because the calculation missed €1,500 to €3,500 of real monthly fixed cost that was hiding in annual invoices, depreciation, SaaS creep, and the owner's unpaid hours.

A complete fixed-cost list for a small shop typically includes:

• Rent — including service charge, common-area maintenance, any percentage-of-revenue floor.
• Salaried staff — gross wage plus employer social contributions (often +25-35% on top of gross in Europe).
• Owner salary at market rate — what you would pay someone to do your job, not what you actually pay yourself. See the honest test below.
• Insurance — public liability, property, employer's liability. Often paid annually; divide by 12.
• Software subscriptions — POS, booking, accounting tools, design tools, the SaaS stack that crept in over three years.
• Accountant / bookkeeper — monthly retainer, or annual fee divided by 12.
• Internet, phone, music licence — small recurring lines.
• Depreciation — equipment wearing out. Espresso machine, fridges, ovens, retail fit-out, computers. Estimate useful life, divide purchase price by life in months. Most small-shop break-even calculations miss this entirely.
• Annual costs spread monthly — domain renewals, professional memberships, software annual licences, equipment service contracts.

The owner who excludes their own salary breaks even on paper while bleeding personally. The owner who includes it gets an honest number and can make honest decisions — raise prices, reduce hours, restructure, or accept that the model needs to change. For the full unpack of what counts as fixed versus variable and where the edge cases sit, see fixed costs vs variable costs for small shops.

Why "variable" is everything that scales with each sale

The denominator of the break-even formula depends on getting variable costs right. Variable costs are anything that exists because a sale or operation happened — that scales, even loosely, with revenue. The clean test: if the shop closed for a week with no operations, would this cost go to zero? If yes, variable. If no, fixed.

Typical variable cost lines by sector:

The trap in variable costs is undercounting them. Card fees, packaging, shipping shortfall, per-order materials, casual staff hours above the schedule — each is small individually, collectively they often add 5-10 percentage points to the variable cost ratio. A cafe that thinks its COGS is 32% and ignores the rest is using a 68% contribution margin when reality is closer to 62-65%. Break-even moves by 5-8% on that mistake alone.

Break-even is a moving target

The single most dangerous assumption in break-even analysis is that the number you computed last year still holds. It does not. Break-even drifts upward almost continuously for most small shops, and the drift is usually invisible because the individual moves are each small.

Four common ways break-even creeps up without anybody noticing:

• Rent escalation. Most commercial leases include annual or biennial uplifts indexed to inflation. A 3-4% rent rise on a €1,800/month rent is €54-€72/month — €650-€870/year — that lifts the fixed cost numerator without any decision from the owner.
• Supplier price increases. Coffee, milk, ingredients, packaging, supplier-side card fees: most owners absorb a 4-7% supplier price rise without changing menu pricing. That compresses contribution margin directly, raising break-even.
• SaaS creep. The accounting tool that was €40/month is now €60. The new reviews app added €45/month. The Klaviyo tier moved up €20/month. Individually invisible; collectively, most small shops have €200-€500/month of subscription drift over a 24-month window.
• New hires or expanded hours. A new part-time hire on guaranteed hours, or a senior stylist demanding €300 more per month, or hiring a VA for ten hours a week — each lifts fixed cost by a known amount that should re-trigger the break-even calculation but rarely does.

The fix is mechanical: re-run the break-even calculation every month, using the actual fixed costs and the actual contribution margin from the last 30-60 days. Owners who do this monthly notice the drift the month it happens. Owners who do it quarterly notice it three months late, after the personal account has already absorbed it. Owners who do it annually do not really do it at all.

The three levers to lower break-even

If your current break-even is uncomfortably close to (or above) your current revenue, you have exactly three levers. Optimising the menu, swapping suppliers cosmetically, doing more marketing — none of these change the structural math. The three that do:

Lever 1: cut fixed costs

The fastest lever and usually the lowest-friction one. Three moves that work in almost every small shop: (1) kill unused subscriptions — audit the SaaS stack quarterly, cancel anything not actively used in the last 60 days; most shops find €100-€300/month of dead subscriptions on the first pass. (2) Renegotiate rent at the next break clause or renewal; in a soft commercial market, a 5-10% reduction is often available for a long lease commitment. (3) Review staff cost structure — not by cutting people, but by checking whether the salaried vs hourly mix matches actual demand patterns; a fully salaried week on a quiet trading pattern is fixed cost that hourly scheduling would have avoided.

A €300/month reduction in fixed cost on a 65% contribution margin drops break-even revenue by €300 ÷ 0.65 = €462/month. That is roughly €5,500 of annual revenue you no longer need to generate to keep the lights on. The lever pays back instantly and every month forever.

Lever 2: raise prices

The highest-leverage lever and the one most owners avoid because they overestimate customer price-sensitivity. A price rise lifts contribution margin directly because variable costs (mostly COGS) are denominated in euros, not as a percentage of revenue — raise the menu €0.30 and €0.30 of every additional euro goes straight into contribution.

A 5% price rise on the cafe example above (€4.20 → €4.41 average ticket) keeps variable cost at €1.47 per ticket, lifting contribution per ticket from €2.73 to €2.94 — contribution margin moves from 65.0% to 66.7%. Break-even revenue drops from €9,231 to €8,996 — a €235/month improvement, plus an additional ~€280/month of contribution on existing volume. Net effect on the monthly P&L of a 5% price rise: roughly €500/month of additional EBIT, assuming no volume loss.

The fear of volume loss is usually overblown. Most small shops on a 5-10% price rise lose 0-5% of customers and gain meaningfully on contribution from the remaining 95%+. The owners who hold prices flat for three years are not protecting their customer base — they are absorbing 12-15% of cumulative supplier inflation as personal subsidy.

Lever 3: reduce variable cost percentage

The slowest lever and the one with the most compounding effect. Four moves: (1) renegotiate with suppliers — most shops have not asked their largest supplier for a price review in 12+ months; a 4-6% reduction on the dominant COGS line is often available. (2) Optimise packaging — custom-branded takeaway cups cost 30-50% more than plain; the customer-experience uplift is usually invisible and the per-unit margin hit is real. (3) Reduce waste — cafe food waste, salon product over-use, retail markdown rate — each is a hidden variable cost that compresses margin without anyone tracking it. (4) Renegotiate card processor rates — if your card mix is 70%+ and your rate is over 1.8%, the rate is negotiable for a small shop with two years of trading history.

A 3-percentage-point improvement in contribution margin (e.g., 65% → 68%) on €9,231 of break-even revenue drops the new break-even to €6,000 ÷ 0.68 = €8,824 — saving €407/month of break-even revenue. Cumulative across a year that is roughly €4,900 of margin that did not need to be earned. Combine the three levers — €300/month off fixed costs, 5% price rise, 3-point margin improvement — and break-even revenue often drops by 15-25% without changing the shop's fundamental operations.

Break-even is not profit — it is the floor

Break-even is not the target. Break-even is the floor below which the shop loses money. The target lives above break-even — at the revenue level that produces the profit you need the shop to generate, not just enough to keep the lights on.

A useful mental model: there are three operating revenue levels for any small shop.

• The floor (break-even): the revenue at which the shop covers all costs and produces zero profit. Lights stay on, owner gets paid, nothing is built.
• The buffer level: 10-20% above break-even. Generates a modest profit margin, builds a small reserve, lets the owner take a holiday without bleeding the week.
• The target level: the revenue at which the shop produces the profit the owner actually wants — typically 25-50% above break-even, generating an EBIT margin in the healthy range for the sector (cafe 8-12%, retail 10-15%, salon 15-20%, ecom 8-15%).

Owners who set their monthly revenue target at break-even drift in and out of profitability month-to-month — one slow week pushes them below, one good week pushes them above, neither produces real margin. Owners who set the target 25-40% above break-even produce real profit consistently and can absorb a slow month without losing money on the year.

A worked example: the cafe with €6,000 fixed costs and 65% contribution margin breaks even at €9,231/month. If the owner wants €1,500/month of EBIT, the target revenue becomes (€6,000 + €1,500) ÷ 0.65 = €11,538/month — about 25% above break-even. That is the number that should be on the wall. Break-even is the safety net underneath it, not the goal.

Break-even across five small-business types

Different sectors live in different break-even profiles because their fixed-cost shape and contribution margin shape look nothing alike. Five realistic profiles below, all using the formula above with sector-appropriate inputs.

The patterns. Salons have the lowest absolute break-even revenue because contribution margin is high (thin product cost) and ticket size is meaningful. Restaurants have the highest because fixed costs are large (kitchen brigade, full FOH, larger premises) and contribution margin is constrained by food cost percentages industry-wide. Shopify stores sit in the middle on revenue but have the most fragile structure because contribution margin is lowest — every percentage-point shift in CAC, return rate or shipping cost moves break-even meaningfully. Cafes live in a high-volume low-ticket model where the daily transaction count (73-85/day) is the operational metric that matters more than monthly revenue.

How nouz makes break-even visible monthly and daily

Computing break-even once in a spreadsheet and checking it quarterly is roughly the same as not computing it at all. The number drifts (rent escalates, suppliers raise prices, subscriptions creep), the contribution margin shifts (product mix changes, COGS moves, card fees change with card mix), and by the time the quarterly check happens, the shop has already drifted off-target for three months.

nouz computes break-even from the same inputs you enter for the daily P&L — there is no separate setup. The mechanics:

1. Fixed costs: entered once with start dates and optional end dates. The daily slice (monthly total ÷ 30.4375) drops into every day's P&L automatically and recomputes the moment a fixed cost is added, edited or ended.
2. Contribution margin: derived live from the last 30-90 days of actual revenue minus actual variable costs (COGS snapshots at moment of sale, card fees on card revenue only, packaging and other variable lines as you log them).
3. Break-even revenue: recomputed every evening from current fixed total ÷ current contribution margin %. If you added a SaaS subscription on Tuesday, your break-even number lifts on Tuesday — not in next quarter's P&L review.
4. Daily progress against break-even: a running monthly revenue figure compared to the recomputed break-even number, so you know at any point in the month whether the trajectory clears the floor.

The reason this matters operationally: break-even drift is the single most common reason small shops underperform their own assumptions. The owner believes break-even is €8,500/month because that is what the spreadsheet said in February. By August, after two supplier price rises, one rent escalation and three new app subscriptions, actual break-even is €9,400/month — and the shop has been quietly losing money on average days for four months without anyone noticing. nouz catches that drift the week it starts because the calculation runs every evening with the inputs you logged that day.

Use the free small-business break-even calculator to run the formula on your own numbers without signing up — plug in monthly fixed costs, average ticket and contribution margin and get the answer in 30 seconds. For the cafe-specific version with sector-appropriate defaults, use the cafe break-even calculator. For the AOV-focused Shopify version, use the AOV break-even calculator for Shopify. For the underlying margin math, the profit margin calculator covers contribution and gross margin side by side.

For the wider reading: fixed costs vs variable costs for small shops covers the categorisation that drives the formula's inputs. EBIT explained covers the daily profit number that sits one step beyond break-even, and the daily P&L pillar guide is the cross-vertical synthesis. I make sales but no profit walks through the seven leaks that quietly push a shop below break-even without anyone noticing. Why is my cafe not making money, how many clients does a salon need to break even, and break-even AOV for ecommerce apply the same formula to specific verticals in depth.

If you want the calculation running against your real numbers every evening — instead of in a spreadsheet you re-open quarterly — nouz is monthly with no contract. Setup takes about ten minutes: enter your fixed costs once, your VAT rate, your product catalogue with cost prices. From the first evening close, your break-even number is live and recomputes every time the inputs change.

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