Practical guide
Break-Even Analysis for a Small Business
Break-even analysis estimates the sales volume required for contribution from sales to cover fixed costs.
Published and reviewed by FBM Calculators Hub on .
What break-even analysis answers
Break-even analysis asks how many units must be sold before the contribution from those units covers fixed costs. At the break-even point, the simplified model reports neither profit nor loss.
The calculation is useful for comparing prices, variable costs, capacity plans, and fixed-cost commitments. It is an estimate, not proof that the forecast sales volume can be achieved.
Formula and variable definitions
Break-even units equal fixed costs divided by selling price per unit minus variable cost per unit. The amount in parentheses is contribution per unit.
Fixed costs do not change directly with each unit in the modeled range. Variable costs increase with each unit. If price is not greater than variable cost, each additional sale contributes nothing toward fixed costs and no finite break-even volume exists.
Worked example
A small business has $10,000 of fixed costs for the period. It sells one product for $50, and the variable cost is $30. Contribution is therefore $20 per unit.
$10,000 divided by $20 gives 500 units. Multiplying 500 by the $50 price gives $25,000 of break-even revenue. If only whole units can be sold, a fractional result should be rounded upward for planning.
Stress-test the result
A single break-even answer can hide uncertainty. Recalculate with a lower achievable price, higher variable cost, or higher fixed-cost estimate. This creates a useful range rather than treating one forecast as certain.
- Confirm every input covers the same time period
- Separate costs that change per sale from period fixed costs
- Model discounts and channel fees if they reduce realized price
- Check whether production or staffing capacity can support the volume
- Run separate scenarios when products have materially different contribution
Limits of a one-product model
A simple unit calculation assumes a stable price and variable cost and works best for one product or a consistent sales mix. A multi-product business may need weighted-average contribution and additional cash-flow planning. Taxes, financing timing, inventory purchases, and delayed customer payments can also create cash pressure before accounting break-even is reached.