The café has been open eleven months. It is busy at lunchtime, the reviews are good, and the owner works six days a week. In August she took £19,400 through the till, which felt like a strong month, and at the end of it there was £700 less in the bank than at the start.
She knows the business is not working. What she does not know is how far off it is, because turnover is a number that tells you almost nothing on its own.
Sort the costs by what happens when you sell one more
Break-even needs your costs split into two kinds, and the test is a single question: if I sell one more, does this cost go up.
Rent does not. Business rates do not. Insurance, the accountant, the broadband, the alarm contract, the equipment finance and the licence fees do not. Those are fixed, and they arrive whether you open the door or not.
Food cost goes up. Packaging goes up. Card processing fees go up. Materials on a job go up. Those are variable, and they are incurred per unit sold.
Some costs sit in the middle. Staff are the big one. A rota that never changes is a fixed cost. Hours added on a busy Saturday are variable. Utilities behave the same way: a standing charge and a base load that are fixed, and consumption that moves with trade. Split them by estimate rather than agonising. Put the rota you run at minimum staffing into fixed, and the extra shifts into variable, and the answer will be close enough to act on.
Contribution per unit, then per customer
What is left of a sale after its variable costs is the contribution. It is the money that unit contributes towards covering the fixed costs, and once the fixed costs are covered, the contribution on every further sale is profit.
If the average lunch bill is £11.40 and the food, packaging and card fees on it come to £4.30, the contribution is £7.10 per customer. If fixed costs, including the owner's wages, are £11,800 a month, break-even is 11,800 divided by 7.10, which is 1,662 customers a month. Across twenty-six trading days that is sixty-four customers a day, every day, before the business makes a penny.
That number is the point of the exercise. Sixty-four is a fact about the premises, the opening hours and the number of seats. You can stand in the room and ask whether sixty-four people a day is plausible, and then ask how many you actually served yesterday. Nobody can do that with a break-even expressed as £226,000 of annual turnover.
Run the same arithmetic in whatever unit your trade measures itself in. Chargeable days a month for a consultant. Jobs a week for a plumber. Rooms a night for a small hotel. Cars a day for a garage. If the break-even number is higher than the physical capacity of the business, no amount of marketing fixes it, and you are looking at a pricing problem or a cost problem rather than a demand problem.
Your own wages are a fixed cost
The most common way to get this wrong is to leave the owner out. A business that breaks even without paying its owner has not broken even, it has employed somebody for nothing and called it profit.
Put a market salary for the work you do into fixed costs. If you are working sixty hours a week doing a job you would otherwise pay somebody £34,000 to do, £34,000 plus employer National Insurance goes in the fixed column. The break-even number that comes out is the real one, and it is usually a shock the first time.
While you are in there, add the things that are certain and annual but do not feel like monthly costs. The accountant's fee. The insurance renewal. The equipment that will need replacing, divided by the years it lasts. The Corporation Tax on the profit you are aiming at. A business that breaks even before tax and before replacing anything is a business that shrinks slowly.
The margin of safety is the number to watch
Once you know break-even, the useful ongoing measure is how far above it you are running. Sales, less break-even sales, as a percentage of sales, is the margin of safety, and it tells you how much trade you could lose before you are into losses.
A margin of safety of 5% means a bad fortnight is a loss. At 30% you can absorb a competitor opening across the road, a wet July or a roadworks scheme outside the door. Different trades sit in different places naturally, and businesses with high fixed costs and high contribution per unit, such as hotels, gyms and restaurants, have violent operating leverage: they lose money fast below break-even and make it fast above it. A jobbing trade with almost no fixed costs barely notices a quiet month.
Recalculate when anything structural changes, which means at rent review, when you take on a member of staff, when you buy equipment on finance, and when your supplier puts prices up. A wage increase or a rates revaluation from the Valuation Office Agency does not change your turnover, it moves the number of customers you need, and it moves it immediately.
Then use it forwards. The question is not only whether you break even now. It is what the break-even becomes if you take the bigger unit, hire the second person or open on Sundays, and whether the extra trade that decision brings is bigger than the extra fixed cost it commits you to. Most bad expansions in small businesses are a fixed cost signed for on the strength of a good quarter.
Where this shows up in the game
Business Baron makes the fixed cost base visible and then makes you live in it. Rent, rates, staffing at the level you have committed to and the finance on the equipment all leave the account whether or not anybody came in, and the trade-specific models mean a restaurant and a plumbing round behave nothing like each other around the same turnover. Players who expand on a good quarter, and move their break-even without noticing, tend to find out in the following January.