Break-Even Calculator

Your break-even point is the sales volume where total contribution from units sold exactly covers fixed costs. Below that level, the business is losing money on operations before tax. Above it, each additional sale adds profit once fixed overheads are paid.

Break-even analysis is most useful when a decision changes price, cost structure, or fixed commitments. Launching a product, hiring staff, signing a lease, or increasing advertising spend all raise the same question: how many sales are needed before this starts paying for itself?

This calculator uses three inputs — fixed costs, selling price per unit, and variable cost per unit — to estimate break-even units, break-even revenue, and contribution margin . It is a planning estimate, not a substitute for full accounting or tax advice.

Suppose a product sells for £50 and costs £30 in materials, packaging, and fulfilment per unit. The contribution margin is £20 per unit — the amount each sale puts towards fixed overheads.

With fixed costs of £10,000 per month, break-even is 500 units (£10,000 ÷ £20). Break-even revenue is £25,000 (500 × £50). The contribution margin percentage is 40%, because £20 of every £50 sale is available before fixed costs.

If the business sells 400 units, it has generated £8,000 of contribution — still £2,000 short of covering fixed costs. At 600 units, contribution totals £12,000, leaving £2,000 towards profit after overheads are paid. That gap is why break-even is a sales target worth checking before costs rise.

Break-even units = fixed costs ÷ (selling price − variable cost per unit). The bottom part of the formula is contribution margin per unit: what one sale leaves behind after direct variable costs.

Break-even revenue is simply break-even units × selling price. Some teams find revenue easier to track because sales reports often show turnover before unit counts are clear.

If contribution margin is zero or negative, break-even does not exist for that offer on its own. That is a signal to revisit pricing, supplier costs, product mix, or whether the sale should be bundled with a higher-margin item. If the business sells several products with different margins, use the multi-product break-even calculator instead of forcing everything into one average product.

Run break-even before you add fixed cost that depends on sales volume being hit — new hires, larger premises, long advertising contracts, or equipment leases. The output turns a pricing spreadsheet into a concrete target: sell X units or £Y revenue.

It is also useful when comparing two pricing strategies. A lower price may look easier to sell, but if contribution per unit falls sharply, the required volume can jump. A higher price with fewer sales might reach break-even sooner even if it feels harder to market.

Businesses with high fixed costs and thin margins need reliable volume. Leaner models with lower fixed costs can survive slower months, but only if contribution margin on each sale is genuinely healthy.

Raise price where customers still see value — even a small increase can reduce required units if variable cost stays flat. Cut variable cost through better supplier terms, less waste, or simpler fulfilment. Both levers widen contribution margin per unit.

Reduce fixed costs by delaying non-essential hires, renegotiating rent, or avoiding long contracts until volume is proven. Improve product mix towards items with stronger margin shifts the average contribution across the business.

Finally, test conservative sales assumptions before committing. A plan that only works at optimistic volume becomes stressful quickly. If break-even looks unrealistic, change the offer before changing the forecast.

Break-even analysis fails when fixed costs are understated, variable costs omit payment fees or fulfilment, or price changes are tested without recalculating contribution per unit.

Enter the figures you already know from forecasts, ad dashboards, or management accounts, then read the headline output before changing multiple inputs at once.

Use it before hiring, signing a lease, launching a product, or comparing a lower-price strategy against a higher-margin offer.

If the result drives hiring, fundraising, or pricing, rerun with conservative assumptions as well as your base case.

At £50 price, £30 variable cost, and £10,000 fixed costs, contribution is £20 per unit and break-even is 500 units — £25,000 revenue before profit begins.

Change one lever at a time — price, variable cost, burn, cash balance, or funnel volume — to see which assumption moves the outcome most.

Compare the calculator output to a recent month of real data; material gaps usually trace to misclassified costs or mismatched time periods.

Re-run after major decisions land — new pricing, a campaign scale-up, or a headcount change — because static estimates go stale quickly.

Mixing monthly and annual figures, or folding one-off costs into recurring burn, is the fastest way to misread runway and break-even targets.

Optimistic conversion or sales volume assumptions can make a plan look viable on paper while cash still runs down in reality.

This is a planning estimate, not audited accounts. Confirm cost classification with your bookkeeper and revisit assumptions when mix, seasonality, or supplier terms change.

This page should target break-even calculator, break-even point calculator, break-even units, break-even revenue, and fixed cost break-even searches.

It calculates break-even units, break-even revenue, contribution per unit, and contribution margin from fixed costs, selling price, and variable cost per unit. It does not model multi-product mix, cash timing, taxes, capacity constraints, seasonality, or probabilistic sales forecasts.