Break-Even Analysis for UK Small Businesses in 2026: Formula, Examples and How to Use It

Why Break-Even Analysis Matters for UK Small Businesses

Starting or running a small business requires making dozens of pricing and cost decisions. Break-even analysis gives you a clear, quantitative answer to one of the most fundamental questions: how much do I need to sell just to cover my costs?

Without knowing your break-even point, you are essentially guessing whether a price is sustainable or whether a new cost is manageable. With it, you can make informed decisions about pricing, staffing, premises, and whether a business idea is viable at all.

In the UK context, break-even analysis also needs to account for some costs that are less prominent in other countries: business rates, the employer National Insurance contribution, the apprenticeship levy (for larger businesses), and the VAT registration threshold. Each of these can significantly shift your numbers.

The Break-Even Formula

The core formula is straightforward:

Break-Even Point (in units) = Fixed Costs / (Selling Price per Unit -- Variable Cost per Unit)

The denominator -- selling price minus variable cost -- is called the contribution margin per unit. It tells you how much each sale contributes toward covering your fixed costs.

You can also express break-even as a revenue figure:

Break-Even Revenue = Fixed Costs / Contribution Margin Ratio

Where the Contribution Margin Ratio = (Selling Price -- Variable Cost) / Selling Price.

Fixed vs Variable Costs: Getting the Split Right

The most important -- and most commonly misunderstood -- step in break-even analysis is correctly classifying costs as fixed or variable.

Fixed costs do not change with the level of output in the short term. If you rent a shop for £1,500 per month, that cost exists whether you serve ten customers or five hundred. Other typical fixed costs for a UK small business include:

• Rent and service charge
• Business rates (after any relief)
• Business insurance
• Accountancy and bookkeeping fees
• Software subscriptions
• Loan repayments
• Any salaried employees (including yourself, if you pay yourself a salary)
• Utilities at a base level

Variable costs move in line with sales. If you make each product for £4, and you sell 100, your variable costs are £400; sell 200 and they are £800. Variable costs include materials, packaging, per-unit delivery costs, and sometimes hourly labour.

Some costs are semi-variable -- they have a fixed element and a variable element. Phone bills, for example, might have a £30/month line rental (fixed) plus a charge per call. For simplicity, you can either split these into their components or classify them as fixed if the variable element is small.

Worked Example 1: A Coffee Shop

Sarah runs an independent coffee shop in a market town. Her monthly fixed costs are:

• Rent: £1,400
• Business rates (after small business relief): £0
• Insurance: £120
• Staff (one part-time employee): £900
• Accountancy: £80
• Equipment lease: £150
• Total fixed costs: £2,650/month

Her average selling price per drink (across coffees, teas, and cold drinks) is £3.20. Her average variable cost per drink (coffee beans, milk, cups, lids, napkins) is £0.80.

Contribution margin per drink = £3.20 -- £0.80 = £2.40

Break-even in drinks per month = £2,650 / £2.40 = 1,104 drinks per month

That is roughly 37 drinks per day over a 30-day month -- a useful, concrete target to aim for.

Worked Example 2: A Self-Employed Consultant

James is a self-employed management consultant. He charges £600 per day. His costs are almost entirely fixed: he works from home (no rent) but has insurance of £80/month, professional subscriptions of £120/month, software of £50/month, and accountancy of £100/month. His variable costs per day of consulting are negligible -- perhaps £10 for travel and printing.

Fixed costs per month: £350

Contribution margin per day = £600 -- £10 = £590

Break-even in billable days = £350 / £590 = 0.6 days per month

This tells James he only needs to bill less than one day a month to cover his overhead -- anything above that is profit before tax. His real constraint is not breaking even; it is generating enough days at his rate to replace a salaried income after income tax and National Insurance. Our

can help model that.

Worked Example 3: A Small Product Business

A maker of handmade skincare products sells primarily through a market stall and their own website. Their monthly fixed costs total £1,800 (rent on a small unit, packaging design subscription, insurance, Etsy and Shopify fees at a flat rate, and one part-time helper at £600/month).

Their average product sells for £18. Variable costs (ingredients, packaging, postage) average £6 per item.

Contribution margin per item = £18 -- £6 = £12

Break-even = £1,800 / £12 = 150 units per month

How the VAT Registration Threshold Changes Everything

One of the most important UK-specific break-even considerations is the VAT registration threshold. Once your taxable turnover crosses £90,000 in a rolling twelve-month period (2026 figure), you must register for VAT.

If you sell to consumers (private individuals), adding 20% VAT to your prices is difficult because it immediately makes you 20% more expensive than competitors who are below the threshold. You have three choices: absorb the VAT within your existing price (reducing your contribution margin by up to one-sixth), raise prices (risking volume loss), or find efficiencies elsewhere.

For the skincare business above, if they were selling each item at £18 inclusive and had to add VAT at the standard rate, the effective revenue per item would drop to £15 once they remit VAT -- reducing the contribution margin from £12 to £9. The break-even would jump from 150 units to 200 units per month.

This so-called "VAT cliff edge" is a real planning issue for growing small businesses.

The Margin of Safety

Once you know your break-even point, you can calculate your margin of safety -- how far your sales can fall before you slip into loss.

Margin of Safety = (Actual or Projected Sales -- Break-Even Sales) / Actual or Projected Sales, expressed as a percentage.

If Sarah's coffee shop serves an average of 1,400 drinks per month but needs 1,104 to break even, her margin of safety is (1,400 -- 1,104) / 1,400 = 21%. That means a drop in customers of around a fifth would put her in the red.

A higher margin of safety means a more resilient business. If you are operating with a margin of safety of only 5-10%, you have very little room for a slow month, a price increase from a supplier, or unexpected costs.

Using Break-Even to Set Prices and Plan Growth

Break-even analysis is not just a one-time exercise -- it is a tool you should revisit whenever your costs or pricing change. In the current environment, many UK small businesses have seen fixed costs rise due to increases in the National Living Wage (£12.21 per hour from April 2025) and employer National Insurance.

If you employ staff, the employer NI rate of 13.8% on earnings above the secondary threshold adds a meaningful fixed cost. For a part-time employee earning £900 per month, employer NI is around £50-70 per month depending on their exact earnings -- this should be in your fixed cost calculation.

Use break-even analysis to answer questions like:

• Can I afford to hire another member of staff?
• Should I raise my prices?
• Can I take on a more expensive premises?
• What sales target do I need to hit this month?

For limited company owners, corporation tax at 25% on profits above £50,000 (small profits rate of 19% up to £50,000) is another layer to account for when calculating what you actually keep. Our

helps you model your net position after tax.