MTD Late Filing: What Happens If You Miss a Deadline?
Life gets busy. Deadlines slip. And with Making Tax Digital introducing four quarterly submission deadlines per year instead of one annual return, the chances of missing a deadline have arguably increased. So what actually happens if you file late?
The answer is more nuanced than you might expect. HMRC has introduced a new points-based penalty system for MTD that is fundamentally different from the old Self Assessment late filing penalties. This article explains how it works, what the consequences are, and how to avoid problems.
The New Penalty Points System
Under the old Self Assessment system, missing the filing deadline by even one day triggered an automatic £100 penalty. Under MTD, HMRC has replaced this with a points-based system that is more forgiving for occasional slip-ups but harsher for persistent late filers.
How Points Work
Each time you submit a quarterly update, End of Period Statement, or Final Declaration late, you receive one penalty point. Points accumulate over time.
For MTD for Income Tax, you have a quarterly submission obligation, which means your penalty point threshold is four points. Once you reach four points, every subsequent late submission triggers a £200 penalty.
Here is how it plays out:
| Late Submission | Points Total | Penalty |
|---|---|---|
| First late filing | 1 point | No financial penalty |
| Second late filing | 2 points | No financial penalty |
| Third late filing | 3 points | No financial penalty |
| Fourth late filing | 4 points (threshold reached) | £200 |
| Fifth late filing | 4 points | £200 |
| Sixth late filing | 4 points | £200 |
Once you hit the threshold, you are charged £200 for every late submission until you reset your points.
How to Reset Your Points
To reset your points to zero, you need to meet two conditions:
- Achieve a period of compliance — submit all required updates on time for a consecutive 24-month period
- Be up to date — all outstanding submissions must have been filed
This means that once you accumulate four points, you need two full years of perfect compliance to reset. This is a strong incentive to take deadlines seriously from the start.
Late Payment Penalties
Separately from late filing penalties, MTD also has penalties for late payment of tax. These work differently:
- Up to 15 days late: No penalty
- 16-30 days late: A penalty of 2% on the tax outstanding at day 15
- 31+ days late: A further 2% on the tax outstanding at day 30, plus a daily penalty calculated at 4% per year on the outstanding amount
The 15-day grace period is designed to give people a buffer — but beyond that, penalties accumulate quickly.
Note: Late payment penalties apply to the annual tax payment, not to the quarterly updates. Quarterly updates are reporting obligations — you do not pay tax with each quarterly submission.
Interest on Late Payments
In addition to penalties, HMRC charges interest on any tax paid late. The interest rate is set at the Bank of England base rate plus 2.5%. Interest accrues from the original payment due date until the date you pay.
What If You Genuinely Cannot File on Time?
HMRC recognises that there are legitimate reasons for missing a deadline. If you have a reasonable excuse, you can appeal a penalty point. Reasonable excuses include:
- Bereavement — the death of a close relative near the filing deadline
- Serious illness — a health condition that prevented you from filing
- IT failures — HMRC's systems being unavailable near the deadline (documented)
- Fire, flood, or natural disaster — destroying your records or equipment
- Unexpected postal delays — if relevant to paper-based elements
What is not a reasonable excuse: - Forgetting the deadline - Being too busy - Finding the software difficult to use - Your accountant failing to file on time (this is still your responsibility) - Not knowing about the deadline
If you believe you have a reasonable excuse, contact HMRC as soon as possible. Do not wait for the penalty notice.
Practical Tips to Avoid Late Filing
1. Set Calendar Reminders
The quarterly deadlines are predictable — 7 August, 7 November, 7 February, and 7 May. Set reminders in your calendar two weeks before each deadline and again one week before. This gives you time to prepare without last-minute panic.
2. Keep Records Up to Date
The most common reason for late filing is not having your records ready. If you enter transactions weekly, your quarterly submission takes minutes — you just review the summary and submit. If you leave everything to the deadline, you are trying to reconstruct an entire quarter from bank statements and memory under time pressure.
3. Submit Early
There is no advantage to waiting until the deadline. You can submit your quarterly update any time during the quarter. If your records are up to date by the end of the quarter, submit immediately — do not leave it until the deadline month.
4. Use Software That Reminds You
Good MTD software will notify you when a deadline is approaching and make the submission process straightforward. If your current tool does not do this, consider switching to one that does. For a comparison of options, see our MTD software comparison.
5. Have a Backup Plan
If your usual process fails (your computer breaks down, your software has an issue, you are travelling), have a backup plan. Can you access your software from a different device? Do you have your Government Gateway credentials accessible? Can your accountant submit on your behalf in an emergency?
The First Year: Will HMRC Be Lenient?
The 2026-27 tax year is the first year of MTD for Income Tax for most people. Historically, HMRC has shown some leniency in the first year of new programmes — acknowledging that people are adapting to new processes.
However, there is no formal "first year exemption" from penalties. The points system applies from the start. HMRC has stated that the points-based approach itself provides sufficient leniency — you get three late submissions before any financial penalty. They consider this the built-in grace period.
The pragmatic approach is to treat deadlines as firm from day one. Build good habits in the first year and you will not need to rely on any informal leniency.
What If You Have Already Missed a Deadline?
If you have already missed a quarterly deadline:
- Submit as soon as possible — the late submission generates a penalty point regardless of how late it is, so there is no advantage to delaying further
- Check your points — log into your HMRC account to see your current penalty points status
- Review your processes — understand why you missed the deadline and fix the underlying issue
- File everything else on time — with the points system, one or two late filings are manageable. It is the pattern of lateness that triggers financial penalties
For more detail on the overall penalty framework, see our article on MTD penalties for late submission. Also worth reading: the MTD soft landing for 2026 explains which penalties are waived in the first year.
ClearMTD Helps You Stay On Track
ClearMTD is designed to make quarterly submissions quick and stress-free. With a simple interface, clear deadline reminders, and a submission process that takes minutes when your records are current, there is no reason to miss a deadline.
The best way to avoid MTD penalties is to use software that makes compliance easy. Record your transactions regularly, review your quarterly summary, and submit before the deadline. It really is that straightforward.
Create your free ClearMTD account and take the stress out of quarterly deadlines.
Frequently Asked Questions
Do penalty points expire automatically?
Penalty points do not expire with time alone. You must achieve a 24-month period of full compliance with all submissions made on time, and all outstanding submissions must be filed. Only then are your points reset to zero.
Can my accountant be penalised for filing late on my behalf?
No. The penalty points are applied to you as the taxpayer, even if your accountant was responsible for the late submission. You can take this up with your accountant privately, but HMRC holds you accountable.
Is there a maximum number of penalty points?
The points stop accumulating at the threshold (four for quarterly obligations). Once you reach four points, you do not get a fifth, sixth, or seventh point — instead, you get a £200 financial penalty for each additional late submission.
What if HMRC's systems are down when I try to submit?
If HMRC's systems are genuinely unavailable on the deadline day and you can document this (e.g. HMRC's own service status page showing an outage), this would normally constitute a reasonable excuse for late filing. Submit as soon as the systems are available again and keep evidence of the outage.
Are the penalty rules the same for the Final Declaration?
Yes. Late submission of the End of Period Statement and Final Declaration also generates penalty points under the same system. All MTD submission obligations are treated equally in the points framework.