Making Tax Digital: the £50,000 line is turnover, not profit

The first Making Tax Digital quarterly update is due on 7 August. The threshold is not what most people think it is, the penalties are gentler than feared, and the figures you send say more about your customers than your accounting.

On 7 August 2026, several hundred thousand people will file something they have never filed before.

It is the first quarterly update under Making Tax Digital for Income Tax, covering 6 April to 5 July 2026. HMRC puts more than 864,000 sole traders and landlords in scope. For most of them it will take a few minutes. The part worth understanding is not the filing. It is who has to do it, and what the numbers show.

The £50,000 line is turnover, not profit

This is the single most misread rule in the whole regime, and it is the one that catches people out.

Making Tax Digital for Income Tax applies if your qualifying income is over £50,000. Qualifying income is your total income from self-employment and property before expenses. It is turnover, not profit.

HMRC's own example makes the point plainly: £25,000 of rental income plus £27,000 of self-employment income is £52,000 of qualifying income, and that is over the line. It does not matter that the profit after costs might be a fraction of it.

So a trade business turning over £60,000 with £18,000 of profit is in. A landlord with two properties and a small consulting sideline may well be in. Plenty of people who think of themselves as earning nowhere near £50,000 are in, because the threshold was never measuring what they earn.

HMRC works it out from the Self Assessment return you filed for the previous tax year. Worth checking yourself rather than waiting to be told.

Two things it does not apply to. It is income tax, so limited companies are not affected: if you trade through a company, this is not your deadline. And it is based on your own qualifying income, not your customers' size.

What the update actually is

Less than people fear.

A quarterly update is a set of totals for each income and expense category. You are not sending HMRC your invoices, your receipts, or your customer names. There is no line-by-line transmission of your books.

It is not a tax return. It does not calculate what you owe. The tax return deadline is still 31 January, and the payment dates have not moved.

The detail most people miss is that updates are cumulative. Each one runs from the start of the tax year to the end of that update period, not just the three months since the last one. That sounds like extra work and is actually the opposite: if you got something wrong in the first update, you fix it in the next one rather than resubmitting.

Four deadlines a year, on the seventh of the month: 7 August, 7 November, 7 February and 7 May. If your records run to calendar months you can use 1 April to 30 June periods instead, with the same deadlines.

The penalty position is gentler than the noise suggests

Worth saying clearly, because the opposite is being repeated a lot: HMRC will not issue penalty points for late quarterly updates during the first year of Making Tax Digital for Income Tax.

That is a deliberate soft landing while people learn the system. It does not mean deadlines are optional, and it does not extend to paying your tax: the payment deadlines and the penalties attached to them are unchanged. But if the fear in your stomach is about getting the first one slightly wrong, that fear is larger than the facts.

The part nobody mentions: your update is a collections scoreboard

Here is where quarterly reporting quietly changes something, and it depends on how you keep your books.

If you are on the cash basis, which is the standard method for sole traders and partnerships, you record income when the money actually arrives. Your quarterly update therefore shows what you were *paid* between April and July, not what you *invoiced*. Every customer who is sitting on your invoice makes that number smaller.

That is good news for your tax bill. It is also a quarterly, official, written-down measure of how well you collect. Four times a year, you now put a figure in front of HMRC that is really a report on your debtors.

If you use traditional accruals accounting, the opposite applies. Income counts from the date you invoiced, whether or not anyone paid. As HMRC puts it, cash basis means "you'll not need to pay Income Tax on money you have not yet received". The corollary is blunt: on the accruals basis, you do. You are taxed on invoices that are still outstanding.

Either way, late payment stopped being a private annoyance and became a number you report. Which basis suits you is a genuine question for your accountant, not something to switch on the strength of a blog post.

What to do before 7 August

Check your qualifying income on turnover, not profit. Add gross self-employment and gross property income from last year's return. If it clears £50,000, you are in, whatever the profit says.
Confirm your software is recognised by HMRC. Not every package that does bookkeeping can file MTD updates.
Bring your records up to 5 July. The update covers April to early July, so anything unreconciled is work you are doing twice.
Reconcile what you were actually paid, not what you invoiced. On the cash basis this is the number, and it is the step where most of the surprises turn up.
Pull your aged debtor list while you are in there. You are already looking at who paid and who did not. That list is the most useful by-product of the whole exercise.
Do not panic about getting it perfect. Updates are cumulative and year one carries no penalty points for late updates. File, then correct.

What August is really the start of

The thresholds keep coming down. £30,000 from April 2027. £20,000 from April 2028. Each step pulls in a much larger group of smaller businesses, and by then the soft landing on penalties will be behind us.

The lasting change is not digital record keeping. It is the rhythm. Cash flow used to be something you could look at properly once a year, in a panic, in January. Now there is a moment every quarter where you have to look at what came in.

Most businesses will find the filing easy and the figures uncomfortable. Not because the tax is wrong, but because seeing four times a year exactly how much of your invoiced work turned into money is a harder read than seeing it once.

That gap between what you invoiced and what you were paid is not an accounting problem. It is a chasing problem, and it is the one thing on this page that no software deadline will fix for you.

That is what we built Penny for. She watches every invoice, chases the overdue ones by email and text, and when someone keeps ignoring it, she picks up the phone and has the conversation. By the time your next update comes round on 7 November, the number you report is the number you earned.

*This is general information, not tax advice. Your accountant knows your circumstances, and the cash basis question in particular is worth a conversation.*