What happens if I miss an MTD quarterly update?

Late submissions are handled by a points-based system: you collect a point each time you miss a deadline, and once your points reach HMRC's threshold a fixed penalty is charged. Points expire after a period of compliance. The exact threshold and penalty amount are set by HMRC and published on GOV.UK.

Are the penalties for late payment different from late filing?

Yes — they're two separate systems. Missing a submission deadline earns penalty points; paying your tax late attracts late-payment penalties plus interest, which build up the longer the tax stays unpaid. You can be charged under both at once.

Will I be fined the moment I'm mandated?

No. Penalties only apply once you miss an actual deadline. The single best way to avoid them is to have HMRC-recognised software in place and a routine for sending each update on time before your mandation date.

Do penalty points reset?

Points are designed to clear after a sustained run of on-time submissions, so an occasional slip doesn't haunt you forever. The precise reset rules are on GOV.UK and depend on your submission frequency.

MTD for Income Tax penalties, explained

Under Making Tax Digital for Income Tax there are more deadlines than the old once-a-year return, so it's worth understanding how HMRC penalises late filing and late payment. The good news: the system is designed to be forgiving of the occasional slip, and the penalties are easy to avoid once you have software and a routine in place.

Two separate systems

It helps to keep two things apart. Late submission — missing a quarterly update or your final declaration — is dealt with by penalty points. Late payment — not paying the tax you owe on time — is dealt with by separate penalties plus interest. They run independently, so a late update and a late payment can both be charged for the same period.

How the points system works

Instead of an immediate fine for one missed deadline, HMRC gives you a pointeach time a submission is late. Once your points reach a set threshold, a fixed penalty is charged — and a further penalty for each later default while you're at the threshold. Keep submitting on time and the points eventually clear. The exact threshold, penalty amount and reset period are set by HMRC and published on GOV.UK; we deliberately don't reproduce the figures here so they can't go stale.

Late-payment penalties and interest

Paying late is treated separately. The longer the tax stays unpaid, the more it costs: a late-payment penalty that escalates with time, plus interest charged on the outstanding amount. Even if you can't pay in full, filing on time and talking to HMRC about a payment plan is almost always cheaper than going quiet.

When this starts mattering for you

Penalties only bite once you're mandated and a real deadline passes. MTD for Income Tax is phased in highest incomes first (April 2026 (£50k+), then April 2027 (£30k+), then April 2028 (£20k+)), so check the deadlines & who's affected page for your exact start date, and see how the quarterly updates work so none of those deadlines take you by surprise.

The simplest way to avoid them

Have HMRC-recognised software ready before your mandation date, not after.
Keep records as you go, so each quarterly update is a five-minute job, not a scramble.
Set a reminder a week before each deadline rather than relying on memory.
File on time even if you can't pay in full — the two penalties are separate.

The finder shows the cheapest recognised tool that fits your situation, so being compliant needn't be expensive.

Frequently asked questions

What happens if I miss an MTD quarterly update?: Late submissions are handled by a points-based system: you collect a point each time you miss a deadline, and once your points reach HMRC's threshold a fixed penalty is charged. Points expire after a period of compliance. The exact threshold and penalty amount are set by HMRC and published on GOV.UK.
Are the penalties for late payment different from late filing?: Yes — they're two separate systems. Missing a submission deadline earns penalty points; paying your tax late attracts late-payment penalties plus interest, which build up the longer the tax stays unpaid. You can be charged under both at once.
Will I be fined the moment I'm mandated?: No. Penalties only apply once you miss an actual deadline. The single best way to avoid them is to have HMRC-recognised software in place and a routine for sending each update on time before your mandation date.
Do penalty points reset?: Points are designed to clear after a sustained run of on-time submissions, so an occasional slip doesn't haunt you forever. The precise reset rules are on GOV.UK and depend on your submission frequency.

Keep reading

Penalty rules and figures are set by HMRC and current details are on GOV.UK. This is general information, not tax advice — confirm your own position with HMRC or a qualified accountant.