Most cash flow problems in small companies are not really cash flow problems. The money was there; it was spent because it looked available. Tax that has been collected but not yet paid over is the single biggest cause, and it is also the easiest to fix, because the fix is mechanical rather than clever.
The principle
VAT you charge is not your money. PAYE and National Insurance deducted from staff pay is not your money. Corporation tax on profit already earned is a liability that exists whether or not the bill has arrived. A bank balance that includes all three tells you nothing useful about what you can spend.
Savings pots (Spaces in Starling, Pots in Monzo, sub-accounts or a linked business savings account elsewhere) let you separate those amounts physically rather than mentally. It sounds trivial. It is the intervention we see change behaviour most reliably.
How to set it up
Three pots covers most companies: VAT, payroll taxes, and corporation tax.
For VAT, move the VAT element out on the day the money lands rather than at quarter end. If you are on the flat rate scheme, move the flat rate percentage instead, and remember the difference is taxable income.
For payroll, move the PAYE, employee NI and employer NI on the day you run payroll. The figures come straight off the payroll report.
For corporation tax, a percentage of profit rather than of turnover. The right percentage depends on your rate, so take the figure from your accountant rather than guessing; on a company paying the small profits rate, nineteen percent of monthly profit is the starting point.
Personal tax is the one people forget
If you take dividends, the tax on them is payable by you, often many months later, and nothing deducts it at source. The same applies to sole traders and landlords, where a full year of profit can arrive before the first payment on account is due.
A personal pot, funded at the point you take the money out, avoids the January conversation where a client discovers their tax bill exceeds their current account balance. For anyone caught by Making Tax Digital for Income Tax, quarterly updates make the liability visible more often, which helps only if something is being set aside.
What a pot does not do
Ring-fencing is a discipline, not a legal protection. Money in a savings pot is still the company's money and still available to creditors. It does not change when tax is due, it does not reduce what is owed, and it will not save a company that is genuinely unprofitable. It will only reveal that fact sooner, which is itself worth something.
One caution: interest earned in a business savings pot is taxable income and needs to be in the accounts. And do not set money aside so enthusiastically that you cannot pay suppliers. The point is to see the real position, not to hide money from yourself.
The test
If you cannot answer "how much of this balance is actually mine" in under ten seconds, the pots will earn their keep in the first quarter.
