21/10/2026
Once the tax money, the profit slice and your own pay are out of the way, whatever is left in the operating account is the real size of your business.
That is an uncomfortable sentence for most owners the first time they read it.
Here is what it looks like in practice. A company turning over £250,000, moving 30% to tax, 5% to profit and paying the owner £3,500 a month. That leaves £120,500 a year to run everything else. Rent, software, insurance, the van, wages, the accountant, the bit that goes wrong in March.
If £120,500 will not do it, one of four things is true. The price is too low. The costs are too high. The owner's pay is unrealistic. Or the turnover is not what you thought it was because a chunk of it is VAT you were treating as income.
That fourth one accounts for more of the shortfalls I see than the other three put together.
The value is not that the operating account solves anything. It is that it stops you finding out in nine months. A number that goes down every month is telling you something now, while October is still a month you can do something with.
Look at yours this week. Reply to this if what you find does not make sense.