MTD Penalties
Explained

How HMRC Will Penalise Late Filing Under MTD for Income Tax

Missing a deadline under Making Tax Digital for Income Tax won't result in an immediate fine. HMRC uses a points-based penalty system, the same framework already used for VAT. You accumulate points for missed submissions, and only once you hit a threshold do financial penalties kick in.

That said, the penalties are real once the grace period ends, and for sole traders and landlords already stretched thin, they're worth understanding now rather than after the fact.

The Points-Based Penalty System

Every time you miss a required MTD submission (a quarterly update or your end-of-period statement), HMRC adds one penalty point to your record. Points expire after a period of good compliance, but if you accumulate too many before they drop off, you'll be hit with a flat financial penalty.

The threshold depends on how frequently you're required to submit:

• Quarterly submissions (most sole traders and landlords): threshold is 4 points
• Annual submissions: threshold is 2 points

Once you hit the threshold, every subsequent missed submission triggers a £200 fine, on top of your existing points. The points themselves don't reset until you've filed everything on time for a sustained period.

When Do You Get a Penalty Point?

A point is triggered each time you miss a filing deadline without a valid excuse. Under MTD for Income Tax, that means:

• Missing a quarterly update (you'll have four per tax year, covering income and expenses from each quarter)
• Missing your end-of-period statement (the annual finalisation, due by 31 January)
• Missing the final declaration (replacing the Self Assessment return)

Points don't expire quickly. HMRC requires a full period of clean compliance, typically 24 months of consecutive on-time submissions, before your points count resets to zero.

Financial Penalties: The Actual Numbers

Once you've hit the threshold (4 points for quarterly filers), each further missed submission costs £200.

There are also separate late payment penalties, which are not points-based:

• Day 1–15 late: no penalty if paid in full by day 15
• Day 16–30 late: 2% of the unpaid tax
• Day 31+: 4% of the unpaid tax (annualised daily rate from day 31)
• Day 31 onwards: a further 4% annualised rate begins accruing daily on any outstanding balance

HMRC also charges late payment interest separately, currently at the Bank of England base rate plus 2.5%. These charges stack, so a large unpaid bill left unaddressed becomes expensive quickly.

Who Does This Apply To?

The penalties apply from the date MTD for Income Tax becomes mandatory for your income level:

• Wave 1, April 2026: sole traders and landlords with gross income over £50,000
• Wave 2, April 2027: gross income over £30,000
• Wave 3, April 2028 (planned): gross income over £20,000 (subject to legislation)

Your gross income is the total from all self-employment and property sources before expenses. If you're close to a threshold, don't assume you're safe; HMRC uses your prior year's figures to assess whether you need to comply.

Reasonable Excuse: When HMRC May Waive a Penalty

HMRC won't always enforce penalties if you have a reasonable excuse, a genuine, unexpected reason you couldn't file on time. This isn't a loophole; it's a proper statutory provision.

HMRC considers the following as potentially valid reasonable excuses:

• Serious illness or hospitalisation of yourself or a close family member
• Bereavement of a close family member shortly before the deadline
• Unexpected IT failure by HMRC's own systems
• A fire, flood, or theft that destroyed relevant records
• Postal delays outside your control (less relevant under MTD, but still applicable to correspondence)

What HMRC does not accept as reasonable excuse:

• "I didn't know the deadline": ignorance of the law is not accepted
• Pressure of work or being too busy
• Relying on an accountant who missed the deadline (you remain responsible)
• Software difficulties that you could have resolved in time
• Lack of funds to pay the tax owed

The bar is genuine, unavoidable, and unforeseeable. If you think you have a reasonable excuse, act quickly; claims should be made promptly after the missed deadline.

How to Appeal an MTD Penalty

If you receive a penalty notice and believe it was issued incorrectly, or you have a reasonable excuse, you have the right to appeal. Here's how:

Step 1: Request a Review

Within 30 days of the penalty notice date, write to HMRC requesting a statutory review. You can do this through your HMRC online account or by post. State clearly that you're appealing, give your UTR, and explain your grounds, either that the penalty was issued in error, or that you have a reasonable excuse.

Step 2: HMRC Internal Review

HMRC will appoint an officer not involved in the original decision to review your case. They have 45 days to respond (extendable by agreement). They can uphold, reduce, or cancel the penalty.

Step 3: First-tier Tax Tribunal

If HMRC's review goes against you, you can escalate to the First-tier Tax Tribunal, an independent body. This is free to apply to, and you don't need a lawyer, though the process is formal. Apply within 30 days of the review conclusion. The Tribunal can override HMRC entirely.

Don't delay appealing. The 30-day window from the penalty notice is strict. If you miss it, you'll need to apply for a late appeal and demonstrate a good reason for the delay.

The Smartest Way to Avoid All of This

The points system rewards consistency. File on time, every time, and you'll never accumulate points. The best way to make that easy is to use MTD-compatible software that connects directly to HMRC, reminds you of quarterly deadlines, and submits on your behalf with a few clicks.

We've compared the leading options, from full-featured platforms like QuickBooks and Xero to lightweight tools built specifically for sole traders and landlords. See our MTD software comparison to find the one that fits how you work, and remove the penalty risk entirely before your wave goes live.