Break-even: the first number a small business should know
Break-even tells you how many sales cover your costs. Here is how to work it out, and why raising price beats cutting overheads almost every time.
Ask a small business owner their revenue and they will answer instantly. Ask how many units they must sell before they earn anything and the answer is often a pause. Break-even is the more useful number of the two, because it converts a pile of costs into a single target you can actually aim at.
Two kinds of cost, one calculation
Every cost is either fixed — rent, insurance, salaries, software, things you pay whether or not you sell anything — or variable, incurred only when you make a sale: materials, packaging, payment fees, shipping.
Each sale contributes its price minus its variable cost toward covering the fixed pile. That figure is the contribution margin, and break-even is simply how many contributions it takes to cancel the fixed costs out.
A business with $50,000 in fixed costs, selling at $40 with $15 of variable cost, contributes $25 per sale. Fixed costs ÷ contribution = 50,000 ÷ 25 = 2,000 units. Sale number 2,001 is the first that makes money — and it makes the full $25, because the fixed costs are already paid.
Which lever moves it most
This is where break-even earns its keep, because the intuitive lever is the weakest one. Starting from that same business:
| Change | New break-even | Improvement |
|---|---|---|
| Baseline: $50k fixed, $40 price, $15 variable | 2,000 units | — |
| Raise price by $5 (+12.5%) | 1,667 units | −333 units |
| Cut variable cost by $3 (−20%) | 1,786 units | −214 units |
| Cut fixed costs by $5,000 (−10%) | 1,800 units | −200 units |
A $5 price rise beats a $5,000 overhead cut. The price change costs nothing to implement and improves every future sale; the overhead cut is a one-off saving that took real effort. Price is almost always the most powerful lever available, and it is the one owners are most reluctant to touch.
Getting the inputs right
Break-even is only as good as the cost split, and two mistakes are common. The first is forgetting your own wage: if you are not paying yourself, your break-even is fictional and the business is subsidised by unpaid labour. Put a realistic salary in the fixed costs.
The second is treating payment fees as fixed. Card processing, marketplace commissions and shipping scale with sales, so they belong in variable costs. Misfiling them flatters the contribution margin and puts break-even lower than it really is.
The number tells you more than a target
- Feasibility. If break-even needs 2,000 units and your market realistically buys 500, the problem is the business model, not the marketing.
- Safety margin. Selling 3,000 against a break-even of 2,000 means sales could fall a third before you lose money. That is your real resilience.
- Risk profile. High fixed costs mean a high break-even and a steep climb — but every sale past it is very profitable. Low fixed costs break even early and grow more slowly.
- Pricing floor. If price is below variable cost, contribution is negative and no volume will ever help. Each sale simply loses money faster.
Recalculate more often than feels necessary
Break-even is not a figure you compute once at launch. Rent rises, suppliers reprice, a new subscription joins the fixed pile, shipping costs move. Any of those shifts the target, usually upward and usually unnoticed. Running the numbers quarterly turns it from a founding exercise into an early-warning system.
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