Profit vs Cash: Why Your Bank Balance Doesn’t Match Your Accounts

Good month on paper. Empty-looking bank account. Sound familiar?

It’s a common issue for businesses across the UK currently. The accounts say the business made money. The bank balance says otherwise. And if nobody can explain the difference, it starts to feel like the numbers can’t be trusted.

They can. Profit and cash flow simply measure different things, and the gap between them catches out a lot of business owners — including well-run, profitable businesses. It almost always comes down to one of three causes.

Profit and Cash Answer Different Questions

Your profit and loss account asks: did the business earn more than it spent this period? It records sales when you invoice them and costs when you incur them, regardless of when any money actually moves.

Your bank balance asks something else entirely: how much cash is here right now?

Both are correct. They’re just rarely in sync.

1. You’ve Been Paid on Paper, Not in the Bank

Raise an invoice today and it counts as a sale today. The money itself turns up 30, 60, sometimes 90 days later — if the client pays on time. Until then, your profit is sitting in other people’s bank accounts.

Counterintuitively, this gets worse when things are going well. A growing business raises more invoices each month, which means more cash locked up in unpaid sales at any one time. Plenty of businesses have run out of cash while growing profitably — the work was there, the money just hadn’t arrived yet.

If your debtor balance keeps climbing, that’s your profit. You just can’t spend it yet.

Which is why your debtor list deserves a regular review — not just when cash feels tight. Look at who owes what each month and chase the overdue ones early, before they drift from 30 days to 90. And it’s worth asking whether your payment terms are actually reasonable for your business: if 60-day terms are quietly starving you of cash, that’s something to renegotiate — especially with new clients.

2. Tax Is Building Up Quietly

The second cause is money sitting in your account that was never really yours.

VAT is the obvious one. If you’re VAT registered, a slice of every payment you bank belongs to HMRC. It looks like cash — right up until the quarterly return is due and a chunk of your balance disappears in one go.

Corporation Tax works the same way, on a longer fuse. It accrues all year as you make profit, whatever the payment date says. A good year quietly builds a good-sized tax bill, and if nothing’s set aside along the way, it lands on whatever happens to be in the account months after year end.

None of this is a surprise in the accounts. It’s only a surprise in the bank — and only if nobody’s tracking it.

3. Money Is Leaving That Profit Never Sees

The third cause runs the other way: cash going out that barely touches the P&L.

Add these up and it’s entirely possible to make £50,000 of profit in a year and end it with less cash than you started. Nothing has gone wrong. The money has just gone to places the P&L doesn’t show.

The Fix Is Simpler Than It Sounds

You don’t need complicated software or a finance team. You need a clear picture, updated monthly:

1. What’s coming in

   Invoices raised, when they’re actually due, and who’s overdue.

2. What’s going out

   Wages, suppliers, loan repayments — the lot.

3. What’s already accounted for

   VAT collected, Corporation Tax accruing — money that’s in the account but spoken for.

Once you can see all three, the gap between profit and bank balance stops being a mystery. You can see the tax bill forming months ahead, spot slow payers before they become a problem, and know what’s safe to take out of the business — and when.

The businesses that get caught out aren’t the unprofitable ones. They’re the ones flying blind between year-end accounts, finding out where the cash went twelve months after it left.

This post is intended as general guidance only. Always seek specific advice tailored to your own circumstances and refer to the latest HMRC guidance.