E-invoicing penalties in the UK: what HMRC could charge

No penalties have been announced for the UK e-invoicing mandate. As of 20 October 2026, the government has confirmed that all VAT invoices must be e-invoices from April 2029, but it has not published any penalty regime, grace period or enforcement approach. The consultation response records that respondents wanted "clarity on the compliance framework, focused on the nature and scale of penalties for non-compliance", including whether penalties will "mirror those under MTD". The government did not answer that question.

So anyone quoting a specific e-invoicing fine for the UK today is guessing. What we can say is which existing VAT penalties already apply to invoices and records, because those rules will not disappear.

What is confirmed, and what isn't

Question	Status
A penalty regime specific to e-invoicing	Not announced
Penalty amounts or percentages	Not announced
A soft-landing or grace period	Not announced
Whether penalties will follow the MTD model	Not announced
Whether invalid e-invoices still count as VAT invoices for input tax	Not announced
Existing VAT penalties for invoices and records	In force today

The implementation roadmap is due at Budget 2026 on 28 October 2026. It may set out milestones for legislation, but detailed penalty rules usually come with draft legislation and guidance, which could be later.

Existing penalties that already touch invoicing

These are in force now and are not specific to e-invoicing. They show how HMRC can act on invoicing failures today.

1. Breaches of VAT regulations (section 69, VAT Act 1994)

The VAT invoicing rules sit in the VAT Regulations 1995. Section 69 of the VAT Act 1994 lets HMRC charge a penalty when a person fails to comply with requirements imposed by regulations made under the Act. The penalty is a daily amount of £5, £10 or £15, depending on previous failures in the last two years, for up to 100 days, or £50 if that is greater. A reasonable excuse can cancel it.

The VAT guide also warns retailers that "you may be liable to a financial penalty if you do not issue a VAT invoice when asked to do so by a taxable person."

2. Failing to preserve records (section 69(2))

If you fail to keep records you are required to preserve, the penalty is £500. VAT records, including invoices issued and received, must normally be kept for six years. See how long to keep e-invoices.

3. Invoices showing VAT when you are not registered (Schedule 41, Finance Act 2008)

Issuing an invoice that shows VAT when you are not authorised to do so carries a penalty based on the VAT shown: 30% for non-deliberate cases, 70% if deliberate and 100% if deliberate and concealed. Reductions apply for disclosure.

4. Input tax claimed without valid evidence

A VAT invoice is the main evidence for reclaiming input tax. HMRC's self-billing notice warns that invoices issued without a valid self-billing agreement "are not evidence of your entitlement to input tax" and that "HMRC may assess you for tax and charge you a penalty". Inaccuracy penalties on returns can follow from claiming VAT you are not entitled to.

5. Persistent failure to meet e-invoicing conditions

HMRC's existing electronic invoicing notice (700/63) already says: "If you persistently fail to meet the conditions, you may be liable to a penalty." It covers authenticity, integrity and legibility of electronic invoices and storage.

What a future regime might cover

Without speculating on amounts, a mandate creates new kinds of failure that the law will need to address. Likely questions include:

• Not issuing an e-invoice at all, for example sending a PDF instead
• Issuing an e-invoice that fails validation or is missing mandatory data
• Not being able to receive e-invoices from suppliers
• The buyer's position, whether a non-compliant invoice can support an input tax claim

None of these has been answered officially. The consultation response says the government will design standards and guidance with stakeholders and publish them "well ahead of the mandate taking effect".

Lessons from Making Tax Digital

The consultation response repeatedly points to MTD as a reference point, especially for the role of software providers and accountants, and says the government will work closely with MTD software providers. But MTD is not e-invoicing, and the government has not said MTD's penalty approach will apply. Read e-invoicing vs Making Tax Digital for the differences.

How to reduce your risk

Penalties are unknown, but the risks are predictable:

1. Get your VAT invoices right now. The data required on a VAT invoice will not change because the format does. Good master data, such as customer VAT numbers and addresses, cuts errors.
2. Keep your records. Store e-invoices so you can reproduce them as they were sent or received.
3. Check your self-billing agreements are current and in writing.
4. Test early. Choose software that validates invoices before they are sent.
5. Document reasonable excuses. If something goes wrong, records of what you did and why help.

This is general information, not tax advice. For your circumstances, see HMRC's guidance or speak to an adviser.

What to do now

• Follow the roadmap at Budget 2026 and the timeline for legislation dates.
• Check whether you are in scope with our am I in scope tool.
• Read who is in scope of the mandate.