UK e-invoicing mandate: 1 April 2029 start and the spring 2027 consultations

Summary. From 1 April 2029, every UK VAT-registered person, public bodies included, must be able to issue and receive VAT invoices as structured e-invoices unless a specific exemption applies. That date is fixed. Most of what a software team builds against is not. The roadmap that HMRC and the Department for Business and Trade (DBT) published with Budget 2026 on 28 October 2026 confirms Peppol as the UK's interoperability framework, makes HMRC the future UK Peppol Authority and promises two technical consultations in spring 2027: one on the UK e-invoicing standards, one on Access Point certification. Final requirements, business identifiers and software-provider rules follow between October 2027 and April 2028, at least 12 months before the start. The government is taking the enabling powers in Finance Bill 2026-27, which had its Commons first reading on 3 November 2026. A separate HMRC consultation on digital reporting of invoice data is open until 20 January 2027; no decision has been taken, and real-time reporting will not arrive with the 2029 mandate. Our verdict: 2027 is a design-and-respond year. Clean customer and supplier master data, map invoice fields, choose an Access Point route and answer the spring consultations before the rules are fixed. On 13 November 2026, 870 days remain.

About this article. For finance, ERP, accounts payable and tax teams and software vendors with UK VAT-registered entities, including overseas groups. On 13 November 2026 we checked every date and figure against HMRC and DBT publications, the UK Parliament bills record and OpenPeppol, and the European comparison against German, French and Spanish official sources. Where the government has not decided something, we say so. This is general information, not tax or legal advice. Researched with AI assistance and reviewed by our editorial team.

What the government confirmed on 28 October 2026

Budget 2026 was delivered on 28 October 2026, and HMRC published three e-invoicing documents the same day. The first is the implementation roadmap, a joint HMRC and DBT report setting the milestones to 2029. The second is the tax information and impact note (TIIN) on VAT electronic invoicing, which explains the Finance Bill powers. The third is an open consultation on e-invoicing digital reporting, which asks whether HMRC should make any future use of invoice data and closes at 11:59pm on 20 January 2027.

These build on the 2025 consultation, which closed on 7 May 2025. The government's response of 26 November 2025, published with the Budget 2025 announcement of the mandate, kept the decentralised model and ruled out real-time reporting at launch. Peppol was confirmed at Tax Update Day 2026. Treat every undecided row below as a design risk to track, not a gap to fill with assumptions.

The TIIN's Exchequer line, certified by the Office for Budget Responsibility, shows the compliance gain HMRC expects: £0 in 2026-27, £10 million in 2027-28, £55 million in 2028-29, £140 million in 2029-30, £160 million in 2030-31 and £150 million in 2031-32. HMRC puts its own implementation cost at about £19 million, plus a cost of moving the Peppol Authority to HMRC that it has not yet quantified.

The timeline from now to 1 April 2029

Planned means the government intends to act in that window; expected means the outcome depends on Parliament. The 2026 dates come from the Parliament record, the rest from the roadmap.

The government says it does not plan to change the requirements after April 2028, and it will publish updated VAT guidance by then even if secondary legislation is still pending. Your build specification should therefore be stable by mid-2028 at the latest.

Scope: which invoices and which organisations

The mandate changes the format of an existing obligation rather than creating a new one. Under Schedule 11 to the Value Added Tax Act 1994 and regulations 13 to 20 of the VAT Regulations 1995, a VAT-registered person must normally issue a VAT invoice when making a taxable supply to another VAT-registered person. From 1 April 2029 that invoice must be an e-invoice, and every VAT-registered person must be able to receive one. The rules on when a VAT invoice is due and what it must contain do not change.

That gives a simple scoping test for each invoice stream:

• In scope. Taxable supplies between UK VAT-registered persons where a VAT invoice is required, covering businesses, sole traders, partnerships, charities and VAT-registered public bodies. The TIIN adds anyone who must receive a VAT invoice to recover input tax, including public bodies that are not VAT-registered.

• Allowed but not required. Invoices from businesses that are not VAT-registered, and exempt, zero-rated or out-of-scope transactions where no VAT invoice is needed.

• Outside the mandate. Sales to consumers, where VAT invoices are not required, and cross-border transactions. Businesses may still agree to exchange e-invoices with overseas customers.

• Exempt persons. An exemption for digitally excluded VAT-registered persons, modelled on the Making Tax Digital (MTD) for VAT criteria, with details due by April 2028.

Non-established taxable persons (NETPs), meaning overseas businesses registered for UK VAT, follow the same rules as UK entities.

On format, the roadmap is explicit: an e-invoice is structured data exchanged between the supplier's and the buyer's systems. PDFs, word-processed files, images, HTML invoices and faxes do not qualify. That breaks with current HMRC guidance in VAT Notice 700/63, which treats a PDF as an electronic invoice today.

For business-to-government (B2G) invoicing, the public sector is partly ahead. Bodies covered by the Public Procurement Act 2023 must already accept e-invoices that comply with BS EN 16931, and NHS Supply Chain requires its suppliers to send e-invoices over Peppol. The roadmap cites NHS Shared Business Services figures showing e-invoices paid on average 26 days faster than paper or email invoices. If you already invoice the NHS through Peppol, you have a working test case.

The model: Peppol four-corner, HMRC as Peppol Authority and the fifth corner

Peppol is an international framework, governed by OpenPeppol, built on a four-corner model in which buyers and suppliers connect through any accredited service provider instead of a shared one. The supplier (corner 1) sends invoice data to its Access Point (corner 2), which delivers it to the buyer's Access Point (corner 3) and on to the buyer's system (corner 4). The roadmap expects most businesses to reach Peppol through their existing accounting or ERP provider, which runs its own Access Point or uses a third-party one.

Each Peppol country has a national Peppol Authority. In the UK that function sits today within Supply Chain Coordination Limited, which operates NHS Supply Chain. The Finance Bill measure gives HMRC the functions to take over, but when it becomes the Authority is not yet determined. The Peppol Authority will not receive copies of VAT invoices for business transactions.

A five-corner model adds the tax authority as a fifth party that receives invoice data in or near real time. Many respondents to the 2025 consultation favoured decentralised four-corner or five-corner approaches built on Peppol. The government's position on 13 November 2026:

• 2029. Four-corner exchange only. The government will keep exploring real-time reporting but will not introduce it alongside the 2029 mandate; any later requirement would build on the e-invoicing infrastructure.

• Later. Not decided. The digital reporting consultation asks whether selected e-invoice data could be shared with HMRC for defined purposes, such as faster VAT repayment checks. It sets out no preferred model and says digital reporting would not mean HMRC automatically receives every e-invoice.

For ERP architects, the safe assumption is four-corner exchange in 2029, with an invoice data model clean enough that your Access Point provider could add a reporting feed later without re-engineering the ERP.

EDI users get partial comfort. Businesses can keep existing EDI arrangements alongside the UK framework but must also be able to exchange e-invoices through it, and guidance on how the two coexist is promised for autumn 2027.

What the spring 2027 consultations will cover

The roadmap commits to two public technical consultations in spring 2027. Anyone may respond, but HMRC expects the technical content to matter most to software providers.

1. The proposed UK e-invoicing standards. The government will build on established international standards, including those already used in Peppol, and add a small number of UK-specific requirements only where domestic VAT, business or operational needs call for them. The standards package is expected to include:

• core standards defining what an e-invoice must contain and how it is structured;

• technical specifications for exchanging e-invoices and related documents between systems and networks;

• any UK-specific requirements for domestic VAT and business needs;

• rules on business identifiers, validation and other supporting controls;

• guidance and supporting materials.

The roadmap names no syntax or existing specification as the UK core. Peppol's billing specifications and BS EN 16931, already used in UK public procurement, are the likely starting points. The 2025 response said the government would weigh adopting an existing standard against designing a UK-specific one, and would design extensions for sector-specific needs.

2. Access Point certification requirements. Today an Access Point provider prepares its systems, applies through OpenPeppol, completes conformance testing and is certified; the UK consultation will set out any extra UK requirements. The roadmap's annex lists the themes a UK Peppol Authority could cover in its Peppol Authority Specific Requirements (PASRs): business identifiers, security and verification, reporting of network activity, service levels, local interoperability with UK document types, and software-provider accreditation. A separate framework will cover software providers that do not run an Access Point, with a decision on any extra authorisation or accreditation due in spring 2028.

Business identifiers deserve early attention because they touch every customer and supplier record. Every participant will need a registered identifier as part of its Peppol identity. The UK has no single identifier that covers every type of organisation, and the annex gives VAT registration numbers as one example. A decision is due between October 2027 and April 2028.

Software vendors and Access Point providers should respond, and so should large businesses with heavy EDI, self-billing or credit-note volumes, because those edge cases are where a UK extension helps or hurts. The roadmap also lists an HMRC engagement mailbox for organisations that want to help test the policy and standards.

How the UK compares with Germany, France and Spain

We have covered the three nearest European regimes in detail: Germany's 2027 B2B mandate and ERP checklist, France's September 2027 step for SMEs and Spain's Verifactu deadlines. The UK is different on timing, network and certainty.

In Germany, section 27(38) of the VAT Act lets a business with prior-year turnover of €800,000 or less keep sending paper or other formats for 2027 supplies, and lets any business keep using EDI with the buyer's consent until the end of 2027. An e-invoice must follow EN 16931 or an agreed format that can be extracted into it. In France, SMEs and micro-firms must issue e-invoices through an approved platform and transmit transaction and payment data from 1 September 2027. Spain's current Verifactu deadlines come from Real Decreto-ley 15/2025, and sending billing records to the tax agency is optional. The Finance Ministry said on 5 October 2026 that it plans to move the pending obligations to October 2028, alongside mandatory e-invoicing for businesses with turnover up to €8 million. No decree making that change had appeared in Spain's official gazette by 13 November 2026.

A German or French project leaves reusable assets: EN 16931 mapping, validation and supplier onboarding playbooks. The UK roadmap does not phase the start by turnover, so smaller UK subsidiaries cannot wait behind the main entity. And because the UK has chosen a network as well as a format, your Access Point provider's UK certification matters as much as your ERP's output.

What finance and ERP teams should prepare in 2027

HMRC says there is no need to start implementing e-invoicing before the detailed requirements are published, and suggests researching providers and talking to advisers meanwhile. That is right for production builds, but the slow work is data and supplier readiness, not code. A sensible plan runs in four stages.

November 2026 to January 2027: inventory and the first response window.

• List every UK VAT-registered legal entity, including NETP registrations held by overseas group companies.

• List every system that creates or receives VAT invoices: ERP, billing, procurement portals, self-billing runs, EDI gateways and spreadsheets.

• Count outbound and inbound VAT invoices and credit notes by entity, channel and format.

• Decide whether to answer the digital reporting consultation by 20 January 2027, especially if you handle VAT repayment claims.

Spring 2027: answer the technical consultations.

• Have tax, finance systems and procurement read both consultations together.

• Test the proposed data model against your hardest documents: self-billed invoices, credit and debit notes, multi-rate invoices and reverse-charge cases.

• Check the proposed identifier options against what you hold in master data.

Summer 2027: fix master data and processes.

• Validate UK VAT registration numbers for customers and suppliers.

• Map ERP invoice output to the VAT invoice particulars in VAT Notice 700 section 16, then to the draft UK standard.

• Design an accounts payable check that compares invoice bank details with those previously used by the same supplier, a fraud control the roadmap highlights.

Autumn 2027 onwards: vendor decisions and build planning.

• Read the autumn 2027 EDI guidance and decide, partner by partner, between moving to Peppol and running both.

• Put the questions in the table below to your ERP, AP automation and Access Point providers, and get UK commitments in writing.

• Plan the build to start when final requirements land between October 2027 and April 2028, ahead of HMRC's summer 2028 readiness testing.

Smaller businesses may not need a separate product: several MTD software providers already offer e-invoicing, and some have committed to include it in their core package at no extra cost once it is required. If you are choosing accounting software in 2027, our comparison of Xero, QuickBooks and Sage for Making Tax Digital covers the MTD side; add e-invoicing to your questions.

Worked example: a UK wholesaler with £40 million turnover

The figures below are assumptions chosen to show the arithmetic. Substitute your own.

A wholesaler has 2,400 active customers, of which 1,900 are UK VAT-registered businesses, and 650 suppliers, of which 520 are UK VAT-registered. It issues 52,000 sales invoices and credit notes a year and receives 31,000 purchase invoices.

• Outbound volume in scope. If 85% of sales documents go to UK VAT-registered customers, 52,000 × 0.85 = 44,200 e-invoices a year, or 850 a week.

• Inbound volume in scope. UK VAT-registered suppliers are 520 ÷ 650 = 80% of the base. If invoice volume follows the same split, 31,000 × 0.80 = 24,800 inbound e-invoices a year.

• Total Peppol traffic. 44,200 + 24,800 = 69,000 documents a year. The roadmap gives no Access Point pricing, and some providers have told the government they will include e-invoicing in core packages at no extra cost. As a sensitivity, every 1p per document costs 69,000 × £0.01 = £690 a year.

• Master data work. If 10% of the 1,900 VAT-registered customer records have a missing or mismatched VAT number, that is 190 records to fix before identifiers can be registered. The same 10% across 520 suppliers is 52 more, 242 in total.

• Exception handling. If 2% of documents fail validation in the first months, 69,000 × 0.02 = 1,380 exceptions a year, about 27 a week, each needing someone to correct and resend.

• Time available. If HMRC publishes final requirements at the end of its window, in April 2028, the build and test window to 1 April 2029 is 12 months, with HMRC's readiness testing in summer 2028. If it publishes in October 2027, the window is 18 months.

The point is proportion. The code change may be modest, especially if the ERP vendor supplies a UK Peppol connector; the 242 master-data fixes, the exception workflow and supplier onboarding are where 2027 effort should go.

Questions to put to your ERP, AP automation or Access Point provider

The table reflects the roadmap's certification, accreditation and identifier milestones.

How eCorpIT can help

eCorpIT is a Gurugram-based technology organisation, founded in 2021, assessed at CMMI Level 5 and MSME certified, with senior-led engineering teams working across AWS, Microsoft and Google platforms. Our ERP software development team handles invoice data mapping, Access Point integration and test harnesses for credit notes, self-billing and EDI flows, building to HMRC's rules as published. Talk to us at /contact-us/.

Last updated: 13 November 2026.

References

1. Roadmap for e-invoicing implementation, 28 October 2026 — HM Revenue & Customs and Department for Business and Trade

1. VAT: electronic invoicing, e-invoicing requirements (tax information and impact note), 28 October 2026 — HM Revenue & Customs

1. Finance Bill (bill 4316) stages, Bills API — UK Parliament

1. E-invoicing digital reporting, open consultation, 28 October 2026 — HM Revenue & Customs

1. Promoting electronic invoicing across UK businesses and the public sector: consultation response, 26 November 2025 — HM Revenue & Customs and Department for Business and Trade

1. Budget 2026 tax related documents — HM Revenue & Customs

1. Electronic invoicing (VAT Notice 700/63) — HM Revenue & Customs

1. About OpenPeppol — OpenPeppol

1. E-invoicing digital reporting: consultation on the future use of e-invoicing digital reporting — HM Revenue & Customs

1. Umsatzsteuergesetz, section 27 (transitional provisions) — Federal Ministry of Justice, gesetze-im-internet.de

1. Umsatzsteuergesetz, section 14 (issuing invoices) — Federal Ministry of Justice, gesetze-im-internet.de

1. À partir de quand suis-je concerné par la réforme de la facturation électronique ? — impots.gouv.fr (DGFiP)

1. Je découvre la facturation électronique — impots.gouv.fr (DGFiP)

1. Nota informativa sobre los nuevos plazos de adaptación a los SIF — Agencia Tributaria

1. Preguntas frecuentes: cuestiones generales, ámbitos de aplicación (SIF y VERI*FACTU) — Agencia Tributaria

1. Nota informativa, 5 de octubre de 2026: previsión de modificación de los plazos del Real Decreto 1007/2023 (archived copy) — Ministerio de Hacienda

1. Sumario del BOE, 13 de noviembre de 2026 — Boletín Oficial del Estado