Every January, thousands of sole traders have exactly the same conversation. “I thought my tax bill was £3,000.” “So why does HMRC want £4,500?”
The answer is often payments on account. And while the name sounds technical, the concept is surprisingly simple.
What Are Payments on Account?
Payments on account are advance payments towards your next tax bill. HMRC uses them because self-employed people pay tax after earning income, rather than having it deducted as they go through PAYE. The system is designed to bring the self-employed broadly into line with employees who pay tax in real time.
Why the Bill Looks So Big
Imagine your tax bill for the previous year is £4,000. HMRC may ask for:
- £4,000 for the previous year
- £2,000 as a first payment on account towards next year
That makes a total of £6,000 due in January. This catches many people out, because they only expect the first figure. A second payment on account then typically follows in July.
Are You Paying More Tax?
Not necessarily. Part of the amount is simply being paid earlier. Future bills are adjusted to account for these advance payments, so you are not being taxed twice — you are being asked to pay sooner.
Why Sole Traders Get Caught Out
Most people discover payments on account for the first time when the bill arrives. The concept is rarely explained beforehand. The result is panic, confusion and a lot of frantic Googling in late January.
The Bottom Line
Payments on account are not an extra tax. They are advance payments towards future tax liabilities. Understanding how they work removes much of the shock and helps sole traders plan cashflow throughout the year.
123Tax helps you set money aside as you earn, so the January bill — payments on account included — is something you have already planned for rather than something that ambushes you.