Cash flow & operations
Break-Even Point Explained: How to Find the Number That Actually Matters
Your break-even point is the exact sales volume where you stop losing money and start making it. Here's how to calculate it, why revenue alone can't tell you, and what to do once you know the number.
6 min read · Published May 2026
Key Takeaways
- Break-even is the sales volume where contribution margin (price minus variable cost) exactly covers your fixed costs — not a dollar less, not a dollar more.
- Revenue alone doesn't tell you if you're profitable. Two businesses with the same revenue can have completely different break-even points depending on their cost structure.
- The formula: break-even units = fixed costs ÷ contribution margin per unit.
- Margin of safety is how far current sales are above break-even — a small number means a slow month turns into a loss.
- Every business has a break-even point whether or not anyone's calculated it. Not knowing yours means you find out the hard way, usually in a bad month.
Revenue doesn’t tell you if you’re making money
A business doing $40,000 a month in revenue could be comfortably profitable or bleeding cash — revenue alone doesn’t say which. What determines it is the relationship between three numbers: fixed costs, price, and variable cost per unit. Break-even is where those three numbers cross.
Break-even point is the sales volume at which total revenue exactly equals total costs. Below it, you’re losing money. Above it, you’re making it. It’s not a vague target — it’s a specific, calculable number of units or dollars.
The two kinds of costs that matter
Every cost in a business falls roughly into one of two buckets:
- Fixed costs — rent, salaries, software, insurance. These show up whether you make one sale or a thousand this month.
- Variable costs — materials, payment processing, delivery, hourly labor tied to a specific job. These scale directly with volume.
The gap between your price and your variable cost per unit is your contribution margin — what’s left over from each sale to put toward fixed costs and, eventually, profit.
The formula
Break-even in units:
Sell 73 units this month and you're at zero — not a profit, not a loss. The 74th unit is the first one that's pure profit, since fixed costs are already covered.
In revenue terms, that’s 73 units × $150 = roughly $10,900/month — the minimum revenue this business needs before anything is actual profit.
Margin of safety: how much room you actually have
Once you know your break-even point, compare it to what you’re actually selling. The gap is your margin of safety — how far sales could drop before you’re back at a loss.
A business selling 90 units against a 73-unit break-even has a margin of safety of about 19%. A business selling 75 units against that same break-even has a margin of safety of around 3% — one slow month and they’re underwater. Same “profitable” label, very different risk.
Fixed costs aren't actually fixed forever
Why this matters more than revenue growth alone
A common mistake is chasing revenue growth without checking whether it’s moving the break-even point in the right direction. A discount that grows volume but shrinks contribution margin per unit can actually raise your break-even point — you need to sell more just to cover the same fixed costs. Growth that lowers your price without a corresponding cost reduction is growth that makes your business more fragile, not less.
The businesses that handle a bad month well aren’t the ones with the highest revenue — they’re the ones with the widest margin of safety.
Find your actual break-even point
Enter your fixed costs, price, and variable cost to see the exact number.
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Frequently asked
Questions owners actually ask
- What's the difference between fixed and variable costs?
- Fixed costs don't change with how much you sell — rent, salaries, software subscriptions, insurance. You pay them whether you make one sale or a thousand. Variable costs scale with volume — materials, payment processing fees, shipping, hourly labor tied directly to a job. Some costs are semi-variable (a phone plan with overage charges) — for break-even purposes, put them wherever the bulk of the cost behaves.
- What if I sell more than one product or service?
- The simple formula assumes one product with one price and one variable cost. With multiple products, either run break-even separately for your main product line, or use a blended contribution margin — weighted by the sales mix you actually expect. For a rough gut-check, the single-product version usually gets you close enough to be useful.
- Is break-even the same as being profitable?
- No — break-even means zero profit and zero loss. It's the floor, not the goal. Once you're past it, every additional unit contributes its full margin straight to profit, since fixed costs are already covered. That's why the units right after break-even are the most valuable ones you sell all month.
- How often should I recalculate this?
- Any time a fixed cost changes materially (a rent increase, a new hire, a new software subscription) or your pricing or variable costs shift. For most small businesses, a quarterly check is enough — but recalculate immediately before a big decision like hiring, moving, or a price change.
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Educational content only. This article is for informational purposes and does not constitute tax, legal, or financial advice. Every situation is different — consult a qualified professional before acting on anything here.