How many units must be sold before fixed and variable costs are covered?
Unit break-even divides fixed cost by contribution per unit. Contribution is selling price minus variable cost, so only the amount left from each sale is available to recover fixed costs.
Finding contribution before counting units
Price per unit minus variable cost per unit gives the contribution available to cover fixed costs. Fixed costs divided by that contribution produces the break-even unit count.
Break-even revenue multiplies the unrounded unit result by selling price. If contribution is zero or negative, selling more units cannot cover fixed costs under the entered figures.
The sales volume that covers the cost base
The default case calculates contribution per unit first, then determines the unit count and corresponding revenue required to cover the entered fixed cost.
Which inputs move break-even fastest
A higher selling price or lower variable cost increases contribution and reduces break-even units. Higher fixed cost raises the required volume without changing unit economics.
Fixed costs divided by contribution per unit
Contribution per unit = Price − Variable costBreak even units = Fixed costs ÷ Contribution per unitBreak even revenue = Break even units × PriceWhen no positive unit break-even exists
If variable cost equals or exceeds selling price, each additional sale contributes nothing—or makes the shortfall worse—so a normal break-even quantity does not exist.
- Selling price and variable cost per unit remain constant.
- Every unit produced is sold within the modelled period.
- Capacity constraints, stepped fixed costs and product mix are excluded.
Calculations related to break even point
The following tools examine neighbouring parts of the same calculation without changing the inputs or assumptions used above.
Quick answers
Frequently asked questions
What costs belong in fixed costs?
Use costs that do not change directly with unit volume, while per-unit costs belong in the variable-cost input.
Why does a lower variable cost reduce break-even units?
It increases contribution per unit, so each sale covers a larger part of fixed costs.
Should break-even units be rounded up?
Operationally, a fractional unit cannot usually be sold, so the next whole unit may be required even though the calculator displays the direct formula result.
Educational content only. This guide is not financial advice.