What happens if you miss an MTD deadline

MTD replaces an instant fine for lateness with a points-based system. One missed deadline rarely costs anything directly; a pattern of them does.

How the points system works

Missing a quarterly update or tax return deadline adds one penalty point — capped at one per deadline, even if multiple income sources are missed on the same date. Reaching four points triggers a £200 financial penalty, with a further £200 for each subsequent missed deadline.

Below four points, each point expires automatically 24 months after the deadline it came from, on a rolling basis regardless of what happens afterward. Once four points are reached, automatic expiry stops. Clearing the points at that stage requires actively meeting two conditions: everything filed on time for 12 months running, and no outstanding quarterly updates or tax returns from the previous 24 months. Below the threshold, time alone resolves things; above it, resolution has to be earned.

The soft landing covers one year, for one group

HMRC has confirmed that the first mandated group — over £50,000, joining from April 2026 — will not receive penalty points for late quarterly updates during the 2026/27 tax year. Two limits apply. The easement is tied specifically to the 2026/27 tax year for this cohort, not to a taxpayer's first 12 months on MTD generally — nothing published so far extends it to those joining at the £30,000 threshold in 2027 or the £20,000 threshold in 2028. And it covers only late quarterly updates, not the Final Declaration.

The Final Declaration is not covered

Missing the Final Declaration — due 31 January following the tax year, 31 January 2028 for 2026/27 — triggers normal penalty points from day one, regardless of the quarterly soft landing. This is functionally the same deadline, and the same consequence, as missing the old Self Assessment return under its previous name.

Late payment runs on a separate track

The points system above concerns late filing, not late payment. Unpaid tax is subject to a different penalty regime entirely, based on days late, applied regardless of whether filing was on time. Filing on time does not protect against a late payment, and paying on time does not protect against a late filing.

Reducing the risk

Reminders set ahead of each deadline — 7 August, 7 November, 7 February, 7 May, and 31 January for the Final Declaration — outperform reminders set on the day. Weekly reconciliation avoids the more common failure mode: most late submissions happen because records weren't ready, not because the date was forgotten. A submission made a few days late is treated differently from a pattern of missed deadlines, so filing late is still worth doing rather than skipping. HMRC does allow appeals against a penalty where there is a genuine reason for missing a deadline — illness, bereavement, or a system failure outside the taxpayer's control.

Where the real risk sits

For most freelancers in the first year, the quarterly points system is the smaller risk. The larger one is treating the soft landing as covering everything, when the Final Declaration and payment deadlines remain fully live throughout.

Check the calendar

Our MTD Readiness Checker confirms an MTD start date and the full set of deadlines that follow.

Related reading:

This is general guidance, not professional tax advice. Penalty rules can change — check current guidance on GOV.UK.