MTD quarterly updates explained

What an update actually is

A quarterly update is a summary, not a tax return. Your software sends HMRC totals for each income and expense category you use, drawn from the digital records you keep during the period. HMRC does not receive individual invoices, receipts or customer names - only the category totals.

You send one update per business. A sole trader who also lets a flat sends two: one for the trade, one for the UK property business. Foreign property is a separate business again. If a period had no activity at all, you still submit a nil update rather than skipping it.

Nothing about the update is a tax calculation. Your software may show an estimate afterwards, but that estimate is exactly that. The real figures come at the end of the year.

The deadlines

There are two sets of period dates, and the deadlines are identical either way. The standard quarters follow the tax year. The calendar quarters end on the last day of the month, which is simpler if your bookkeeping already runs on calendar months. You choose in your software before your first update of the year.

Deadlines as published in HMRC guidance on sending quarterly updates. The fourth update is due on 7 May in the following tax year.

Why cumulative filing helps you

Each update runs from the start of the tax year, not from the start of the quarter. The November update covers 6 April to 5 October, and it includes the July figures again. That sounds like duplication but it is the single most forgiving feature of the regime: if you discover in October that a July invoice was categorised wrongly, you fix it in your records and the correction flows through automatically. There is no amendment process to learn and no resubmission to make.

It also means the deadline pressure is lower than it looks. An imperfect update filed on time is better than a perfect one filed late, because the imperfection can be corrected later and the lateness cannot.

What happens at the end of the year

Quarterly updates do not replace the tax return. After the fourth update you complete the year-end process in your software, adding everything the quarterly updates never captured: employment income, savings interest, dividends, pension contributions, Gift Aid, capital allowances, private use adjustments and any accounting adjustments. You then submit the return and make your final declaration by 31 January, exactly as before.

Payment dates are unchanged too. Tax is due on 31 January with payments on account on 31 January and 31 July where they apply. Quarterly reporting does not mean quarterly paying.

Penalties

Late submission uses a points system. One point per missed deadline, with a maximum of one point per deadline no matter how many businesses you run. At four points a £200 penalty applies, and a further £200 for each subsequent missed deadline. Individual points expire 24 months after the deadline they relate to. Once you have hit four points, clearing them requires twelve months of on-time submissions and all outstanding submissions from the previous 24 months.

Importantly, HMRC has confirmed there are no penalties for missing quarterly update deadlines in the 2026/27 tax year. That is a grace period for the first mandated group, not a permanent exemption, and it does not remove the requirement to send the updates before you can file your return.

Late payment penalties are separate and are not points-based. They escalate with time: nothing in the first 15 days, then a percentage charged at day 15 and again at day 30, then a daily rate from day 31 until the balance is cleared, with late payment interest running from the first day. Current rates are on the gov.uk penalties page.

The mistakes people make

1. Assuming profit decides mandation. It is qualifying income, meaning gross turnover from self-employment and property before any expenses.
2. Forgetting the second business. Trade and property are separate submissions, and missing one is still a missed deadline.
3. Skipping a nil quarter. A period with no activity still needs an update.
4. Treating the software estimate as a tax bill. It ignores everything outside the business, including employment income and personal reliefs.
5. Leaving categorisation until year end. It is far easier to keep records clean quarterly than to reconstruct twelve months of receipts in January.
6. Choosing a period type in the first quarter and trying to change it later.
7. Assuming an accountant is filing for you without confirming it. Agent authorisation for MTD is separate from existing Self Assessment authority.

Next steps

Check whether the rules apply to you with the MTD checker, then pick software that suits the size of your business using choosing Making Tax Digital software. If you are weighing self-employment against a salary in the first place, self-employed vs employed sets out the full picture.

Common questions