The Break-Even Point Is Where Sales Finally Cover the Whole Machine

Three months in, the food truck sells out most Saturdays, and the owner still can't pay herself a dime. The line she's chasing has a name: the break-even point, where sales finally cover every cost.

The break-even point is the sales level where total revenue equals total cost. One sale below it, the business loses money; past it, each additional sale starts producing profit.

The formula

Break-even units = fixed costs ÷ (price − variable cost per unit).

The bottom of that fraction — price minus variable cost — is the contribution margin. It's what each sale contributes toward the fixed bills after paying for itself.

A worked example

Say fixed costs run $60,000 a month, the product sells for $50, and each unit costs $30 to make and deliver. Every sale contributes $20, so break-even is $60,000 ÷ $20 = 3,000 units.

At 2,500 units, contribution totals $50,000 and the month ends $10,000 short. At 3,500 units, the same math leaves $10,000 of operating profit.

You can state the same threshold in dollars instead of units. Divide fixed costs by the contribution-margin ratio — here $20 ÷ $50 = 40%, so break-even revenue is $150,000.

What moves the number

Raise the price or trim variable costs and break-even falls, because each sale contributes more. Add a fixed expense — a second lease, salaried staff — and the bar jumps.

That link between cost structure and profit shows up later in the profit margin. High-fixed-cost businesses look terrible below break-even and wonderful above it.

Where the tidy math bends

The formula assumes one product, one price, and a constant variable cost. Discounts, returns, a shifting sales mix, and step-up costs — a second oven, a third employee — all move the real threshold.

It also ignores the past. Reaching break-even stops the bleeding; it doesn't repay prior losses or reward anyone for the risk taken.

The SBA's break-even guide includes a calculator for testing your own numbers.

Run the formula before you set the price — not after the lease is signed.