Payments on Account: The January Surprise New Sole Traders Miss


 

January is the cruelest month for new sole traders. You file your first Self Assessment, work out your tax bill, pay it, and then HMRC asks for half as much again. Not a penalty, not a mistake: payments on account. Nobody warned you, and suddenly January's tax bill is 150% of what you expected.

If you are in your first year or two of self-employment, read this before January. It will save you a very unpleasant surprise.

What payments on account actually are

Payments on account are advance payments towards next year's tax bill. HMRC requires them from anyone whose Self Assessment tax bill is over £1,000 and who pays less than 80% of their tax through PAYE or other deductions at source. That describes nearly every sole trader.

The maths is simple and brutal. Each payment on account is 50% of the previous year's tax bill. The first is due on 31 January, alongside the balancing payment for the year just ended. The second is due on 31 July. So in your first January as a sole trader, you pay: last year's tax in full, plus half of it again as the first payment on account. That is the 150% surprise.

A worked example

Say your first year of trading produces a £6,000 Self Assessment bill. On 31 January you pay £6,000 as the balancing payment, plus £3,000 as your first payment on account, a total of £9,000 leaving your bank account on one day. On 31 July you pay the second £3,000. Total paid during the year: £12,000, against a £6,000 actual liability. The extra £6,000 is credited against next year's bill, so it is not lost money, but the cash flow hit is real, and for a new business it can be severe.

This is why so many sole traders feel their tax bill doubles in year two. In a sense it does, temporarily, because you are paying this year's tax and prepaying next year's at the same time.

The traps that make it worse

The first trap is spending the tax money. In year one, there is no payment on account because there is no previous year's bill, so your first January bill feels manageable. Many new traders assume year two will be similar, and they have already spent the cash. It will not be similar. From the second January, budget for 150% of your expected bill.

The second trap is the July payment. January gets the attention because it is the bigger day, but the 31 July payment on account sneaks up on people mid-summer, when nobody is thinking about tax. Diary both dates now.

The third trap is assuming you cannot reduce payments on account. You can, and should, if your income is falling. If this year's profits will be lower than last year's, you can apply to HMRC to reduce your payments on account, through your Self Assessment account or by form SA303. Just be careful: if you reduce them too far and underpay, HMRC charges interest on the shortfall.

Planning ahead like a grown-up business

The fix is boring and effective: from day one of self-employment, set aside 25 to 30% of every payment you receive into a separate tax account, and do not touch it. When January comes, the money is already there. Better still, review your position in November or December with your accountant, so you know the exact figure before the Christmas break rather than discovering it on 30 January.

Payments on account stop being a surprise once you understand the rhythm, but they never stop being a cash flow event. If tax planning, Self Assessment and cash flow forecasting are eating your evenings, it is worth getting proper support. Specialist help with Self Assessment and tax compliance takes the calculation, the deadlines and the surprises off your plate. Firms like Finex Outsourcing, a Global Business Services provider, handle exactly this for UK sole traders and small businesses.

Bottom line: your first January bill is 100%. Your second is 150%. Budget for both from day one, diary 31 July, and reduce payments on account if your income drops. The surprise is optional.


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