If you've been hearing more about e-invoicing lately, you're not imagining it. The UK government has confirmed that mandatory e-invoicing is coming for VAT-registered businesses, and Microsoft has already started building the capability into Dynamics 365 Business Central. Neither of these things needs to be alarming. But they are worth understanding now, while you still have time to prepare rather than scramble.

This article covers what e-invoicing actually means, where UK government policy currently stands, how Business Central already supports it, and the practical steps SMEs can take today to be ready.

What e-invoicing actually means

The phrase "e-invoicing" gets used loosely, and that's causing some confusion. Emailing a PDF invoice to a customer is not e-invoicing, at least not in the sense that regulators mean. A PDF is still a document designed to be read by a person. Someone at the other end still has to open it, read the numbers, and key them into their own system, or hope their software can extract them reliably.

True e-invoicing means structured, machine-readable invoice data that passes directly between the supplier's system and the buyer's system, with no manual re-entry involved. The invoice is generated in a standard format, transmitted electronically, and received by software that can read it, validate it, and post it automatically. Peppol, the international network already used across much of Europe and by parts of the UK public sector, is the framework most commonly associated with this exchange model.

This distinction matters for Business Central users specifically, because it changes what "sending an invoice" means operationally. Instead of a document that a human interprets, you're producing a structured file that another system consumes. Get the underlying data wrong, a missing VAT number, an inconsistent address, an unmatched product code, and the invoice can fail validation before it ever reaches the right person.

Where UK government policy currently stands

HM Revenue and Customs, working with the Department for Business and Trade, ran a public consultation on e-invoicing adoption across UK businesses and the public sector in the first half of 2025. At the Autumn Budget in November 2025, the government confirmed the direction of travel: e-invoicing will become mandatory for all VAT invoices from April 2029, giving businesses several years' notice rather than a sudden change.

Since then, the shape of the regime has become clearer. The government has confirmed Peppol as the core interoperability network underpinning UK e-invoicing, giving software providers and businesses a firmer basis for planning. The approach looks set to follow a decentralised model, meaning invoices pass directly between trading partners' chosen software or Peppol access points, rather than through a central government platform for validation. A fuller implementation roadmap, including technical standards and file formats, is expected at Budget 2026, with ongoing stakeholder engagement continuing through the year via HMRC, the Department for Business and Trade, and a dedicated Peppol UK working group.

Two things are worth flagging for SMEs specifically. First, this is still evolving policy. The broad direction, mandatory e-invoicing by April 2029 on a Peppol-based network, is settled, but some technical detail is still being worked through and confirmed. Second, nothing about this requires action today. There's no penalty for not e-invoicing right now. What there is, is a multi-year runway that rewards businesses who start getting their systems and data in order early, rather than those who wait until the deadline is close.

How this already features in Business Central

You don't need to wait for the UK mandate to start using e-invoicing in Business Central. Microsoft's 2026 release wave 1 included a rebuilt E-Documents and Peppol framework, extending capability that Business Central has been building on for several release cycles.

Business Central includes native support for the Peppol BIS 3.0 format, and connects to certified access point providers, including names such as Avalara, Continia, Pagero and others, through the E-Document Service setup. Sales invoices and credit memos can be sent electronically without additional configuration for the format itself. Release wave 1 also added a purchase draft page that lets your team preview incoming Peppol e-invoices before they're posted, which is a useful control step when a supplier's data doesn't map cleanly to your chart of accounts or item list. Support for additional connectors, including ForNAV, has also broadened the choice of providers available.

In short, the infrastructure is already there. What most SMEs haven't done yet is switch it on, connect a provider, and start testing it with real trading partners. We covered the fuller set of Wave 1 changes, e-invoicing included, in our <a href="https://www.creative-computing.co.uk/resources/business-central-wave-1-features-for-finance-and-operations-teams">roundup of Business Central Wave 1 2026 features for finance and operations teams</a>, if you want the wider picture.

Practical steps SMEs can take now

You don't need to overhaul your finance function to get ahead of this. Three things make the biggest difference.

Enable the functionality and test it. If you're on Business Central, the E-Document framework is available now. Choose a connector, run through the setup, and send or receive a test invoice with a willing supplier or customer. Doing this now, with no deadline pressure, means any teething issues get worked out while the stakes are low.

Talk to your key suppliers and customers. E-invoicing only works when both sides of the transaction are ready. Start a conversation with your largest or most frequent trading partners about their own e-invoicing plans and timelines. Some may already be ahead of you, particularly if they trade internationally or supply the public sector, where Peppol has been in use for longer.

Clean up your master data. This is the step SMEs most often underestimate, and the one that causes the most friction later. Structured e-invoices depend on accurate, consistent data: correct VAT numbers, complete addresses, matching item and G/L codes, and up to date contact details for every customer and vendor. An invoice with a typo in a VAT number might still get read and understood by a person. It's far more likely to be rejected by a system expecting exact, structured fields. Reviewing and tidying your customer and vendor records now, before you're doing it under deadline pressure, is one of the most useful things a finance team can do this year.

Where to start

None of this needs to happen overnight, and the government's own timeline reflects that. But the businesses that get the most value from e-invoicing, lower processing costs, fewer manual errors, faster payment cycles, tend to be the ones who treat the next few years as a runway rather than a deadline.

If you're already running Business Central, get in touch with the Creative team to talk through how e-invoicing works inside your current setup, what's already switched on, and what a sensible next step looks like for your business. Speak to the Creative Computing team about your Business Central environment, or take a look at our consultancy services if you'd like a fuller review of where your processes stand today.