Business Glossary
How to Calculate Break-Even Units
Break-even units is the number of products or transactions a business must sell to cover all costs with zero profit or loss. It is particularly useful for product-based UK SMEs making pricing and production decisions.
The Formula
Break-Even Units = Total Fixed Costs ÷ Contribution Margin Per Unit
Worked Example — UK SME
A UK manufacturer: selling price £85, variable direct cost £52, contribution margin £33. Monthly fixed costs: £42,900. Break-even = 42,900 ÷ 33 = 1,300 units per month.
UK Benchmark
📊 A 5% price increase raises contribution margin from £33 to £37.25, reducing break-even from 1,300 to 1,152 units — 148 fewer units needed to cover all costs. Price increases have a powerful effect on break-even.
Common Questions
How is break-even units different from break-even revenue?
Break-even revenue = break-even units × selling price. For businesses with variable pricing or mixed product ranges, revenue is more useful. For single-product businesses, units is more intuitive.
What happens to break-even if I raise prices?
Each price increase raises contribution margin, which lowers break-even units. A £5 increase on the above example reduces break-even from 1,300 to 1,070 units.
How do I calculate break-even for a multi-product business?
Use a weighted average contribution margin — weight each product’s contribution margin by its proportion of sales volume, then use the weighted average in the formula.
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