Break-Even Sales Calculator
Calculate how many sales, orders or client jobs you need to cover fixed costs, variable costs, platform fees, refunds, VAT display and a target monthly profit.
Enter Sales And Cost Assumptions
Break-Even Result
Sales needed each month to cover fixed costs.
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What This Break-Even Sales Calculator Measures
Break-even sales are the number of orders, products, appointments, covers or client jobs needed for contribution to cover fixed costs. Contribution is the money left from each sale after variable costs, payment fees and expected waste or refunds. Once contribution has paid fixed costs, additional sales start moving towards profit.
The calculator is designed for small UK businesses that need a quick decision model before changing prices, hiring staff, opening longer hours, taking a premises, buying stock or committing to advertising. It does not replace cash-flow forecasting, bookkeeping, tax advice or management accounts. It is a planning lens: if the break-even result is above capacity, the business model needs a change before more fixed costs are added.
Break-Even Formula
The core break-even formula divides fixed costs by contribution per sale. This version also adjusts contribution for platform fees, fixed transaction fees and a refund or waste allowance.
Contribution per sale = price - variable cost - card or platform fee - fixed pence fee
Effective contribution = contribution per sale x (1 - refund or waste rate)
Break-even sales = fixed costs / effective contribution
Target-profit sales = (fixed costs + target profit) / effective contribution
If contribution is zero or negative, the result is not a valid break-even point. Every sale would add too little or lose money before fixed costs are covered.
Fixed Costs Versus Variable Costs
Fixed costs are bills that usually exist even if sales are low: rent, base wages, subscriptions, software, insurance, accounting, web hosting, vehicle lease, loan repayments and standing charges. Variable costs rise with sales: stock, ingredients, packaging, shipping subsidy, direct labour, card processing, marketplace commission and refunds.
Keep the split honest. If a kitchen uses more electricity for every order, some energy cost may belong in variable cost. If a subscription is paid regardless of orders, it belongs in fixed cost. The break-even number can look attractive if too many costs are hidden outside the model.
Worked Examples
A £45 order with £18 stock and packing cost, 2.5% fee, 20p fixed fee and 4% refund allowance leaves about £24.65 effective contribution. With £3,200 fixed costs, break-even is about 130 orders.
A £85 appointment with £12 direct cost and low card fees can carry more contribution, but admin time and no-shows should still be included.
A cafe must watch food cost, staff scheduling, waste and table capacity. Break-even covers may be possible on paper but impossible during quiet weekdays.
Sales Capacity And Margin Of Safety
A break-even number only helps if the business can physically deliver that number of sales. A solo consultant might only have 80 billable appointments a month. A cafe may have enough seats for 1,000 covers but not enough staff or demand. A maker may sell out because production time is the bottleneck. Enter a capacity figure so the calculator can flag whether the target sits inside a realistic operating range.
Margin of safety compares current sales with break-even sales. If current sales are well above break-even, there is more room for a slow month. If current sales are close to break-even, a small rise in fixed costs, refunds or stock prices can push the business into loss.
VAT Threshold And Price Display
GOV.UK says a business must register for VAT if taxable turnover for the last 12 months goes over the registration threshold, currently £90,000, or if it expects to go over the threshold. This calculator shows annualised revenue from the break-even and target-profit sales counts as a prompt only. VAT rules depend on taxable turnover and the type of supply, so use GOV.UK or an adviser if turnover is approaching the threshold.
If VAT registered, the calculator shows a VAT-inclusive customer price. A business-to-business client may focus on the VAT-exclusive price if they can reclaim VAT. A consumer may focus on the total paid. Price testing should use the number your customer actually sees.
Break-Even Sensitivity Table
| Change | What Happens | Why It Matters | Possible Response |
|---|---|---|---|
| Price increases | Contribution rises if volume holds. | Break-even sales fall, but demand may change. | Test price, bundle value or improve offer clarity. |
| Variable cost rises | Contribution falls. | More sales are needed to cover the same fixed costs. | Renegotiate stock, reduce waste or alter product mix. |
| Fixed cost rises | Contribution per sale stays the same. | Break-even sales rise immediately. | Check capacity before taking a lease or hiring. |
| Refunds or waste rise | Effective contribution falls. | Reported sales may look healthy while profit leaks. | Improve quality control, descriptions, delivery or booking policy. |
| Platform fee rises | Every sale gives away more margin. | Marketplace growth may hide weak direct profit. | Compare direct, marketplace and wholesale channels separately. |
How To Use The Result Before Making Decisions
- Run a base case, a pessimistic cost case and a lower-sales case.
- Check whether the break-even sales count is below realistic capacity.
- Compare break-even revenue with cash-flow timing, because invoices and bills do not always land together.
- Separate product lines if they have very different margins.
- Do not add a fixed cost unless the extra contribution can cover it in a slow month.
- Review the model whenever prices, stock costs, wages, rent, VAT status or platform fees change.
FAQ
What is the break-even point in sales?
It is the number of sales needed for total contribution to cover fixed costs, leaving neither profit nor loss before tax and drawings.
Should I include my own wages?
Yes if the business needs to pay you. Owner pay can be treated as a fixed cost or target profit, depending on how you manage accounts.
Does break-even mean I have enough cash?
No. Break-even is profit arithmetic. Cash flow also depends on when customers pay, when suppliers are paid, loan repayments, tax bills and stock purchases.
How do I calculate break-even revenue?
Multiply break-even sales by the selling price. The calculator also shows annualised revenue so VAT threshold and capacity checks are easier.
What if contribution per sale is negative?
There is no useful break-even point. You need to raise price, reduce variable costs, cut fees or change the offer before fixed costs can be covered.
Can I use this for a service business?
Yes. Treat one appointment or client job as the sales unit and include direct labour, travel, software use, payment fees and no-show risk where relevant.
Sources
- GOV.UK. (2026). Register For VAT: When To Register For VAT. GOV.UK. https://www.gov.uk/register-for-vat/when-register-for-vat
- Business.gov.uk. (2026). Setting Up Business Accounting And Finance. Department for Business and Trade. https://www.business.gov.uk/support/business-tax-and-reporting/setting-up-business-accounting-and-finance/
- GOV.UK. (2026). Finance And Support For Your Business. GOV.UK. https://www.gov.uk/business-finance-support
- U.S. Small Business Administration. (2024). Break-Even Point. SBA. https://www.sba.gov/business-guide/plan-your-business/calculate-your-startup-costs/break-even-point