The 31 July tax bill that catches self-employed beauty pros out

You filed your tax return in January, paid what you owed, and got back to your clients. Then a reminder lands: HMRC wants another payment by 31 July, and you never filed anything to trigger it.

That payment is the second payment on account. It is not a new tax, not a penalty, and not a mistake. It is the second half of an advance HMRC already asked you for in January, put towards next year's bill. For a lot of self-employed beauty pros it is the most confusing bill of the year, because it turns up with no return attached to explain it, and often in a quiet stretch when the chair or room rent still has to be paid.

Here is the point. If your income has held steady, this is just tax you owe early, so budget for it and pay it. If your income has dropped, you may be handing over more than you need to, and you can do something about it before 31 July.

The short version

• The second payment on account is due by midnight on Friday 31 July 2026. It is half of last year's tax bill, paid in advance towards this year's.
• It is not a new or extra tax. It covers your Income Tax and your Class 4 National Insurance, billed early in two halves. The first half was due on 31 January.
• You only have payments on account if last year's tax bill was £1,000 or more and less than 80% of your tax was collected at source.
• If you expect to earn less this year, you can reduce both payments through your Self Assessment account or form SA303. Do not over-reduce, because HMRC charges interest on any shortfall.
• Miss 31 July and interest runs from 1 August at 7.75% a year. If you cannot pay, ask HMRC about a Time to Pay arrangement rather than going quiet.

What is the 31 July payment on account?

It is an advance payment towards your next Self Assessment tax bill. HMRC collects it in two instalments: the first by midnight on 31 January with your tax return, the second by midnight on 31 July. Each instalment is half of the tax you owed the year before.

So if last year's tax came to £2,000, HMRC assumes you will owe roughly the same again and asks for it in two £1,000 chunks. The July payment is that second chunk. It covers your Income Tax and, because you are self-employed, your Class 4 National Insurance.

Why does the July bill sting when the chair rent still has to be paid?

Because it arrives on its own, with no return and no fresh calculation, often in a slower summer stretch. The January payment is easier to stomach because you can see the maths next to your return. The July one is just a demand for money on income you may not have earned yet.

In beauty the income is rarely a flat line. A busy December and a dead January, a run of cancellations, a few weeks off, and the months look nothing alike, but the chair or room rent does not stop. That is what makes a payment on account a cashflow trap if nobody warned you it was coming. It helps to set tax aside as you earn, so July is not a shock. Our guide to managing cash flow on irregular income walks through how.

Do you actually have to pay it?

You do not make payments on account if either of these is true: last year's tax bill was under £1,000, or more than 80% of your tax was already collected at source, for example through PAYE on an employed job alongside your beauty work.

If neither applies, payments on account are automatic. You do not opt in. HMRC sets them up the first time your bill crosses the threshold, which is why so many people meet them by surprise in their second year of self-employment.

Can you reduce your payment on account?

Yes, if you genuinely expect to earn less this year than last. You can ask HMRC to lower both instalments through your online Self Assessment account or by filing form SA303. You tell them what you realistically expect to owe, and they reduce the payments to match.

This matters in beauty because your year is not fixed. If you have cut your hours, gone part-time around family, lost a chair, or simply had a slower year, you should not be taxed as if last year repeats exactly. There is a catch. If you reduce the payments too far and it turns out you did owe the money, HMRC charges interest on the shortfall, backdated to the original due dates. So reduce it because your income genuinely fell, not because July is an awkward month to pay.

What happens if you miss the 31 July deadline?

HMRC charges interest from 1 August until you pay. The late-payment interest rate is 7.75% a year as of 9 January 2026, set at the Bank of England base rate plus 4%, so it moves when the base rate moves. Interest runs daily, so a payment that is weeks late costs more than one that is days late.

If you cannot pay in full, the better move is to pay what you can and ask HMRC about a Time to Pay arrangement rather than going quiet and letting it build.

The bottom line

The 31 July payment on account is not a trap and not a bonus tax. It is next year's tax, paid early, in two halves. If your income is steady, budget for it and pay on time. If it has fallen, check whether you can reduce it before you hand over money you may not owe. The worst version of this is finding out it exists on 30 July. Our full guide to payments on account walks through the numbers and the reduction process.

New to all this and not long self-employed? Start with registering as self-employed, which covers the whole setup so payments on account stop appearing out of nowhere.

This is general guidance, not personal tax advice. Your own figures and circumstances decide what you owe, so check your Self Assessment account or speak to HMRC if anything here does not match your situation.