Mandatory e-invoicing in the UK from 2029: what VAT-registered businesses need to know

What has been decided

After consulting from February to 7 May 2025 ^[2], the government confirmed that the UK will introduce mandatory e-invoicing for all VAT invoices from 2029 ^[1]. VAT invoices are typically issued between businesses and to government, so the change mainly affects B2B and B2G trade ^[1].

An e-invoice is not a PDF attached to an email: it is structured data sent from one system to another, which the receiving software can process without retyping.

What is still to come

• A roadmap to implementation, due at Budget 2026 ^[1].
• Technical standards and the transmission model — many respondents asked for alignment with international frameworks such as Peppol ^[1].
• Guidance and support, with the government committing to give businesses clear lead time ^[1].

Why the government is doing it

The government cites research estimating an annual saving of £11,300 for small firms and faster processing, and notes figures from New Zealand showing an e-invoice costs 38% as much to process as a paper invoice ^[1]. Some small business respondents also highlighted its potential in tackling late payment ^[1].

How to prepare now

• Use accounting software rather than word-processed invoices, so your invoice data is already structured.
• Keep customer records complete — legal name, address and VAT number.
• Ask your software provider about its e-invoicing plans once the standards are published.

Structured invoice data also makes chasing more reliable: Nemexio reads due dates and balances directly from your software, so nothing depends on a PDF being opened.