The contribution per unit tells you how much profit each sale generates before fixed costs are taken into account. It is calculated by subtracting variable costs from the selling price.
This is one of the most important metrics in pricing and business planning because it directly impacts how quickly your business reaches break-even and becomes profitable.
If your contribution per unit is too low, you will need to sell a high volume of products just to cover your costs. If it is high, you can reach profitability much faster.
Your contribution per unit represents how much money from each sale is available to cover fixed costs such as rent, salaries, and software subscriptions.
Once your total contribution covers these fixed costs, your business reaches break-even. After that point, every additional unit sold generates profit.
This makes contribution per unit one of the most important metrics for pricing and sales planning.
Formula:
Contribution per Unit = Selling Price − Variable Cost
Variable costs include production, materials, packaging, shipping, or transaction fees — anything that increases with each sale.
Improving contribution per unit reduces your break-even point and increases overall profitability.
Example 1:
Price = £25
Cost = £10
Contribution = £15
Example 2:
Price = £12
Cost = £7.50
Contribution = £4.50
Example 3 (Ecommerce):
Price = £30
Cost = £18
Contribution = £12
This means £12 from each sale goes toward fixed costs and profit.
It is the amount each sale contributes to covering fixed costs and profit.
It determines how quickly your business reaches break-even.
You are losing money on every sale and need to adjust pricing or costs.