Compliance · 🇬🇧 United Kingdom Phased rollout

United Kingdom — Making Tax Digital, NHS Peppol & e-invoicing consultation

MTD VAT reporting universal · NHS Peppol B2G · No general B2B mandate — regulator: HM Revenue & Customs (HMRC). Facts last refreshed: 2026-05-05.

Coverage model

Flowie operates a registered Peppol Access Point in this jurisdiction directly where we hold national accreditation, or via a vetted local partner registered with the in-country regulator where on-the-ground presence is required (KSeF, SDI intermediario, ZATCA service-provider, etc.). Either way, you call the same POST /v1/documents/send.

TL;DR

Making Tax Digital (MTD) for VAT is universal — every VAT-registered UK business submits quarterly VAT data via API.
NHS Peppol mandate (PEPPOL) requires healthcare suppliers to use Peppol BIS for NHS B2G since 2021.
No general B2B e-invoicing mandate; HMRC consultation closed February 2025, results expected during 2026.
Cross-border: Peppol BIS via Flowie's UK AP.

Deadlines

Date	Who	What
2019-04-01	All VAT-registered UK businesses	MTD for VAT launched.
2021-04-01	NHS suppliers	Peppol BIS mandatory for NHS England trading.
≥ 2027	General B2B mandate (under consultation)	HMRC reviewing — Italy-style or France-style framework not yet selected.

Background

The UK is in flux. MTD has digitised VAT reporting for years, but the underlying invoice can still be paper. The 2025 HMRC consultation on full B2B e-invoicing closed in February with high response volume; the government is now sifting between a France-PDP-style decentralised model and an Italy-SDI-style central clearance model. A decision is expected during 2026.

In the meantime, NHS Peppol (often just called PEPPOL within the NHS) is the most mature B2G regime — every supplier to NHS England must transact via Peppol BIS.

Format profile

Peppol BIS 3.0 for NHS B2G and cross-border.
MTD VAT JSON for HMRC quarterly returns (separate from invoice format).
UK VAT: GB + 9 digits.

Required fields

seller.vatNumberstringrequired

Format GB123456789.

Public sector (B2G)

Hub	Peppol identifier scheme	Lookup
NHS Peppol (NHS England)	`0088:GB-NHS-<ods-code>`	https://digital.nhs.uk/services/spine

NHS providers identified by ODS code; all NHS suppliers must transact via Peppol.

B2B reporting / clearance

HMRC MTD — Quarterly VAT return via API; not invoice-level.

Error codes

Generic Peppol BIS schematron error codes apply (BR-*, EN16931-*); no country-specific overlays.

Testing in sandbox

What you want to test	How
UK NHS Peppol	Recipient `0088:GB-NHS-RR8`; sandbox returns 201.
MTD return submission	`POST /v1/compliance/uk/mtd` with the VAT period.

FAQ

Will the UK adopt the EU's ViDA framework?

Unclear. Post-Brexit, the UK is free to chart its own course; HMRC has been studying both EU and non-EU regimes (Australia's Peppol-by-default, Singapore's InvoiceNow). The 2026 decision will reveal which way they go.

References

Primary sources (government / regulator / standards body):

GOV.UK · Promoting electronic invoicing consultation response — HMRC/DBT 2025 consultation response.
GOV.UK · e-invoicing overhaul announcement — Official 2025 government announcement.
HMRC · His Majesty's Revenue and Customs — Tax authority owning future mandate.
OpenPeppol · England NHS profile — NHS Peppol Authority — only UK profile.

Industry analyses (vendor trackers — useful for cross-referencing):

ICAS · Autumn Budget 2025 e-invoicing — Industry analysis — April 2029 mandate.
vatcalc · UK 2029 mandatory B2B e-invoicing — Industry tracker — UK 2029 timeline.