MTD ITSA introduced a new penalty regime alongside the new filing obligations. Miss a quarterly deadline and you earn a penalty point. Accumulate four points and HMRC issues a £200 fine — with another £200 for every further late filing until you get back on track. Miss a payment deadline and a separate set of penalties kicks in, starting the moment you're 15 days late.
With the first Q1 deadline approaching on 7 August 2026, now is the time to understand exactly how the penalties work — and what steps will keep you clear of them.
HMRC will not issue penalty points for late quarterly updates during the 2026/27 tax year. This is an administrative decision to ease the transition. However, if you miss the 31 January 2028 annual declaration deadline, a penalty point will be issued. The soft landing does not apply to late payment penalties — those are live from day one.
Part 1: Late Submission — The Points-Based System
The old MTD penalty model was binary: file late, pay a fine. The new system is graduated. You accumulate points, and only face a financial penalty once you reach the threshold. Here's how it works for quarterly filers:
How penalty points accumulate
Every missed quarterly update or annual declaration earns you one penalty point. It doesn't matter how many businesses you have or how late you file — one missed deadline is one point. Points for income tax are tracked separately from any VAT penalty points you may have.
The threshold for quarterly filers is 4 points. Hit it and HMRC issues a £200 financial penalty. Every subsequent late filing — while you still have 4 or more points — triggers another £200. There's no cap; miss every deadline for a year and you're looking at multiple hundreds of pounds in fines, on top of any payment penalties.
| Points accumulated | What happens | Financial penalty |
|---|---|---|
| 1–3 points | Points recorded, no fine issued yet | £0 |
| 4 points (threshold) | Financial penalty issued | £200 |
| Each late filing after threshold | Additional penalty per missed deadline | £200 each |
How to reset your penalty points to zero
Points don't disappear automatically. To have your points reset, you must meet two conditions simultaneously:
- All outstanding submissions have been filed on time for a continuous 12-month period
- All submissions due in the preceding 24 months have been received by HMRC
In practice: if you have 3 points, you can't just file on time for one quarter and wipe the slate. You need a full year of clean submissions with no gaps in the prior two years. This is why points are far more dangerous than they first appear — they're easy to accumulate and slow to clear.
The threshold system is designed to appear lenient. Three missed deadlines and you're fine — on paper. But those three points may take over a year of perfect compliance to clear, and all it takes is one more slip to trigger a £200 fine with more following. The buffer is not an invitation to file casually.
Part 2: Late Payment Penalties
Late payment penalties are entirely separate from the points system — and they kick in faster. They apply to any tax you owe that isn't paid by the due date, including balancing payments and amounts due after an amended return. They do not apply to payments on account.
| Days overdue | Penalty applied |
|---|---|
| 1–15 days late | No penalty — pay in full within 15 days to avoid all charges |
| 16–30 days late | 2% of the outstanding tax |
| 31+ days late | 2% of tax unpaid at day 30, plus an additional daily rate of 4% per annum on the remaining balance |
The design is deliberate — the first 15 days are penalty-free to encourage prompt payment. After that, the costs escalate progressively. A £5,000 tax bill paid 45 days late would attract a 2% charge at day 16 (£100) plus approximately 4% annualised on the remaining balance for the days beyond day 30.
On top of late payment penalties, HMRC charges interest on all unpaid tax from the day it becomes overdue. The rate is the Bank of England base rate plus 4%. This updates automatically whenever the base rate changes. Interest accrues daily until you clear the balance — there's no cap, and it doesn't stop if you enter a Time to Pay arrangement (though penalties do).
Part 3: Record-Keeping Failures
MTD also creates an obligation to maintain digital records in HMRC-compatible software. If HMRC finds that you have failed to keep digital records or that there are gaps in your digital links, it can issue a £3,000 penalty.
This penalty isn't automatic — HMRC must investigate and actively charge it. But it's a significant exposure for sole traders who are keeping records in spreadsheets, paper books, or non-compatible software. If your records aren't in software that connects directly to HMRC's API, you're at risk.
The Key Deadlines: 2026/27
MTD ITSA operates on four quarterly deadlines plus an annual declaration. Here are the dates for the first year of mandatory filing:
Q1: 6 April – 5 July 2026 → Due 7 August 2026
Your first MTD quarterly update. The Q1 deadline is 87 days from today. Note: during 2026/27, HMRC will not issue penalty points for late quarterly submissions (soft landing) — but payment penalties still apply.
Q2: 6 July – 5 October 2026 → Due 7 November 2026
Second quarterly update. The submission routine should feel familiar by this point.
Q3: 6 October 2026 – 5 January 2027 → Due 7 February 2027
Third update. Covers the Christmas period — plan record-keeping ahead of any holiday disruption.
Q4: 6 January – 5 April 2027 → Due 7 May 2027
Final quarterly update of the 2026/27 tax year.
Annual Declaration → Due 31 January 2028
The End of Period Statement and Final Declaration. This replaces the old Self Assessment return. A penalty point will be issued if you miss this — the soft landing does not cover the annual declaration.
How to Avoid Penalties
There are three things that make missed deadlines almost inevitable: records left until the last week, forgetting when the deadline is, and using software that makes submission difficult. Remove those three causes and the risk drops to near zero.
1. Keep records current throughout the quarter
The single most effective thing you can do is reconcile your bank transactions regularly — weekly or fortnightly — rather than once at the end of the quarter. When your records are current, the quarterly submission takes minutes. When they're left to pile up, it becomes a stressful multi-hour project that's easy to defer past the deadline.
2. Set calendar reminders for every deadline
Put all five dates in your calendar now: 7 August, 7 November, 7 February, 7 May, and 31 January. Set a reminder 10 days before each one. By the time the reminder fires, your records should already be current — you just need to review and submit.
3. Use software that connects directly to HMRC's API
The MTD requirement isn't just about record-keeping — your software must be able to submit directly to HMRC. If you're using a spreadsheet, accounting software that lacks API connectivity, or a workaround solution, you're adding friction to every deadline and leaving yourself exposed to record-keeping penalties. Use software like Neatly that keeps your records in the correct format and submits with one click.
4. If you can't pay, contact HMRC immediately
If tax is due and you can't pay in full, don't wait. Contact HMRC to arrange a Time to Pay (TTP) agreement before the deadline — or as soon as possible after. A TTP agreement stops late payment penalties from accruing further (though interest continues). Ignoring a payment due date is the most expensive thing you can do.
HMRC allows you to appeal a penalty point if you have a reasonable excuse — for example, a serious illness, a bereavement, or a technical failure with HMRC's own systems. "I forgot" or "I was busy" are not reasonable excuses. If you believe you have grounds, appeal promptly using HMRC's online service or by writing to HMRC within 30 days of the penalty notice.
What to Do If You've Already Missed a Deadline
If you missed a quarterly deadline, the damage is limited at this stage — but only if you act now.
- File the overdue submission immediately. There's no benefit to waiting. The longer you delay, the more risk you carry of hitting the points threshold. During 2026/27, you won't receive a penalty point for late quarterly submissions — but the annual declaration is not covered by this protection.
- Check your penalty point balance. Log into your HMRC online account and review your current penalty points. If you're at 3, the next late filing triggers a £200 fine.
- Catch up any overdue payments. If tax was owed and unpaid, calculate the interest and late payment penalty you may owe. Pay the full amount including penalties to stop further charges accruing.
- Set up a compliance routine going forward. One missed deadline is recoverable. A pattern of missed deadlines is expensive. Use this as the moment to get your record-keeping into a regular rhythm.
If you've reached 4 points and received a £200 fine, pay the penalty promptly (within 30 days of the notice) to avoid further interest. Then focus on 12 consecutive months of on-time submissions — that's the minimum track record needed before your points can be reset to zero.
Frequently Asked Questions
Does the soft landing mean I don't need to file Q1 quarterly updates?
No. You still need to file all four quarterly updates to complete your 2026/27 tax year correctly — HMRC requires them before you can submit your annual declaration. The soft landing only means you won't receive a penalty point for late quarterly submissions during 2026/27. It is not a waiver of the obligation to file.
Will I get a penalty if I submit a nil return late?
Yes. Even if you have zero income and zero expenses for a quarter, you still need to submit a quarterly update. A missed nil return earns a penalty point exactly the same as a missed return with figures.
Are penalty points the same as VAT penalty points?
No. Income tax penalty points for MTD ITSA are tracked entirely separately from VAT penalty points. They don't combine or affect each other.
Can my accountant file on my behalf and prevent penalties?
Yes, an authorised accountant can file quarterly updates and the final declaration on your behalf through HMRC's Agent Services portal. However, if they file late, the penalty point is issued to you — not them. The responsibility for timely filing remains yours, even when delegated.
What if HMRC's systems are down on the deadline day?
If HMRC's technical problems prevent you from filing on time, this is a reasonable excuse and grounds for appeal. Document the issue carefully — screenshots, HMRC service status notices — and appeal within 30 days of receiving any penalty notice.