Break-Even Point Calculator: Find Exactly When Your Business Turns a Profit

Every business has a specific point where revenue finally catches up to costs. Before that point, every sale is technically funding a loss. After it, every additional sale is pure profit. That point has a name: the break-even point (BEP) — and it's genuinely simple to calculate once you know the formula.

What Is the Break-Even Point?

The break-even point is the sales volume — in units or in dollars — where total revenue exactly equals total cost. At that volume, profit is exactly zero: not a loss, not a gain. Sell one unit less than break-even, and you're in the red. Sell one unit more, and you're finally making money.

The Break-Even Formula

Break-even analysis rests on three inputs: fixed costs (rent, salaried wages, insurance — expenses that stay the same no matter how much you sell), variable cost per unit (materials, direct labor, packaging — cost that scales with each unit), and selling price per unit.

Contribution Margin = Selling Price − Variable Cost
Break-Even Point (units) = Fixed Costs ÷ Contribution Margin
Break-Even Point (revenue) = Break-Even Units × Selling Price

The "contribution margin" is the key idea — it's how much of each sale is actually left over to cover fixed costs, once that unit's own variable cost is paid. The faster each sale contributes toward covering fixed costs, the sooner you reach break-even.

A Worked Example

Take a small product business with fixed costs of $10,000 a month, a variable cost of $15 per unit, and a selling price of $25 per unit.

• Contribution margin = $25 − $15 = $10 per unit
• Break-even point = $10,000 ÷ $10 = 1,000 units
• Break-even revenue = 1,000 × $25 = $25,000

In plain terms: this business needs to sell exactly 1,000 units — bringing in $25,000 — before it covers all its costs for the month. Unit 1,001 is the first one that actually generates profit.

Why This Matters Beyond the Number Itself

Once you know your break-even point, a few other useful questions become easy to answer. Add a target profit to fixed costs before dividing by the contribution margin, and you get the exact volume needed to hit that goal. If you're currently selling above break-even, the gap is called your "margin of safety" — how far sales could drop before you'd start losing money again. And if a proposed price barely clears your variable cost, your break-even point balloons — sometimes to a volume you'll never realistically hit.