Making Tax Digital for Income Tax: the quarterly update routine, explained

 


From April 2026, Making Tax Digital for Income Tax changes how hundreds of thousands of sole traders and landlords report to HMRC. The annual self-assessment ritual is not disappearing, but it is being joined by something new: quarterly updates of income and expenses, submitted through compatible software. If your qualifying income is above 50,000, you are in the first wave. Here is what the routine actually looks like, and how to make it painless.

Who is in scope, and when

MTD for Income Tax applies to individuals with qualifying income above 50,000 from self-employment, property, or both combined. From 6 April 2026, that group must keep digital records and send quarterly updates to HMRC. Those with qualifying income above 30,000 follow from April 2027. Partnerships come later, and the government has confirmed the timetable in stages, so check where your income sits before assuming you are exempt.

Qualifying income means gross income before expenses, not profit. A landlord with 35,000 of rental income and a 20,000 freelance sideline has 55,000 of qualifying income and is in scope from day one, even if expenses bring profit well below the threshold.

What a quarterly update actually involves

Each quarter, you send HMRC a summary of your income and expenses for the period, generated from your digital records through MTD-compatible software. The quarters follow the tax year: 6 April to 5 July, 6 July to 5 October, 6 October to 5 January, and 6 January to 5 April. Each update is due one month and seven days after the quarter ends, though you can choose calendar quarters if that suits your bookkeeping better.

This is not four tax returns. You do not calculate your tax bill each quarter, and you do not pay anything at this stage. The quarterly update is a progress report. Your final tax position is still settled through the end-of-year finalisation, which replaces the self-assessment return for those in MTD, due by the following 31 January with payment as normal.

The routine that makes it painless

The businesses that will struggle with MTD are the ones that treat each quarter as a mini year-end scramble. The ones that will barely notice it are the ones with a steady routine. Four habits make the difference.

Keep digital records from day one. MTD requires digital records, kept in compatible software or bridged with bridging tools. Spreadsheets alone no longer count unless they connect to HMRC through approved bridging software. If you are still running the business on a paper shoebox or a standalone spreadsheet, now is the time to move. Xero, QuickBooks and Sage all have MTD-ready paths, and the migration is far less painful than most people fear.

Reconcile monthly, not quarterly. Waiting until the week before the deadline to categorise three months of transactions is how mistakes happen. A 20-minute monthly reconciliation, matching bank feeds to invoices and receipts, means the quarterly update is nearly assembled already. This is the single highest-value habit in the whole MTD regime.

Review before you submit. Because the quarterly figures feed HMRC's view of your income, a quick sense-check before each submission matters. Compare the quarter against the previous one. If income has halved or expenses have tripled, find out why before the numbers go to HMRC. Errors can be corrected in later updates, but clean submissions build a cleaner record.

Keep a tax reserve. Quarterly updates give you, perhaps for the first time, a running view of your taxable income through the year. Use it. Setting aside 20 to 30 percent of profit each month into a separate tax account turns the January payment from a shock into a formality. Tax compliance services that include MTD-ready bookkeeping make this automatic rather than aspirational.

What happens if you miss a deadline

MTD uses a points-based penalty system. Miss a quarterly deadline and you collect a penalty point; accumulate enough points and a financial penalty follows. Points expire after a period of good compliance. The message from HMRC is consistent: the system punishes persistent lateness, not the occasional slip, but the safest strategy is simply to never test it.

Where outsourced bookkeeping fits

For many sole traders and landlords, MTD is the nudge that finally professionalises their records. An outsourced bookkeeping team keeps the digital records current, runs the monthly reconciliation, prepares each quarterly update for your review, and flags the tax reserve figure, all inside your own software. Providers like Finex Outsourcing, a Global Business Services firm supporting UK businesses and accountants, run exactly this routine across their client base.

The April 2026 deadline is now a matter of months. The businesses that start the routine now will file their first quarterly update as a non-event. The ones that wait will discover, in July 2026, what a scramble feels like.


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