Belgium's e-invoicing mandate: What changed for businesses and where the gaps remain

Belgium is going through a shift that touches every B2B business in the country.

Since January 2026, e-invoicing has been mandatory. That means that since then, invoices are not only electronic, but also structured, machine-readable data sent directly to software systems, replacing the PDFs and email attachments that most companies relied on for years. According to the European Commission's eInvoicing in Belgium report (2026), over a million Belgian businesses had to adapt to these changes, and for many of them, it has been a steep learning curve.

Belgium had a VAT problem common to many countries: when invoices are PDFs sent by email, there's no way for tax authorities to verify transactions in real time. Businesses could underreport revenue, manipulate amounts, or simply 'forget' to declare certain invoices.

The result? A €4.6 billion VAT gap, according to the European Commission's VAT Gap Report (2023). That’s why they decided to implement e-invoicing, where every invoice becomes structured data that flows through a monitored network, creating a permanent, auditable record the moment it's sent. However, the timeline was tight: the Royal Decree confirmed the final technical specifications only in July 2025, giving businesses and platforms just six months before the e-invoicing went live, and many of them struggled to adapt in time.

If you build software for Belgian businesses, this shift actually creates an opportunity. Your users must comply with  a new invoice workflow, and they are looking for the tools that make it simpler. But reviewing, approving, paying, and matching invoices to transactions are still manual processes that happen partially outside your product. The platforms that can integrate these steps into their product will become the tool they rely on.

Also, the changes in Belgium’s financial ecosystem won’t stop with the e-invoicing mandate. E-reporting is expected to follow in 2028, and it will have a significant impact on businesses’ financial operations.

In this article, we’ll cover what e-invoicing actually changes for businesses, where the gaps remain, and how embedded banking helps close the loop before e-reporting raises the stakes even higher.

Understanding the Belgian e-invoicing reality and Peppol

Before e-invoicing, the standard process was simple: send a PDF by email, wait for someone on the other end to open it and re-enter the details into their own system. It worked, but it was slow, it created errors and it left €4.6 billion in VAT uncollected annually. Belgium decided to fix that.

The e-invoicing mandate came into effect in January 2026, and it established that every invoice exchanged between two VAT-registered businesses has to be structured digital data: a file that software reads and processes automatically, the moment it arrives, without anyone touching it. The amount, the supplier details, the payment reference and the VAT amount due, of course, should all be extracted instantly into the accounting system.

The Federal Public Service Finance (FPS Finance), Belgium's federal tax authority, oversees the mandate. FPS BOSA, a separate government body, manages the technical side and certifies the providers businesses use to send and receive invoices.

Those providers all plug into the same shared European network called Peppol. Every business that joins gets a unique address on the network, a Peppol ID, tied to their company registration number. Once connected, you can exchange invoices with any other business on the network, whatever software they use.

The connection happens through Access Points. Think of them as translators: they convert your invoice into a universal digital language, the Peppol BIS format, so that any connected system on the other side can read it correctly.

That is a solid foundation, but the e-invoicing workflow only covers the invoice itself. To pay the bill, someone still has to leave the software, open a bank portal, and manually enter the IBAN and payment details. The invoice is digital, but the payment process isn’t. That is the gap where over one million Belgian businesses are still losing time every week.

Connecting invoices to payments inside the same platform

Software platforms can make a real difference for their users: by embedding financial services directly into their product, they can turn a broken two-step process into a single, connected workflow where invoices and payments link together. Instead of switching tools, retyping details, and double-checking references, the software automatically creates a payment draft with the correct amount, IBAN, and payment reference, ready for the user to review and approve.

What changes when e-invoices are processed together with payments?

1. Payments become easier. When an invoice arrives, the platform fills in the amount and reference automatically, creates a draft, and routes it to the right person for approval. Users still approve before money moves, but the copy-paste work disappears.
2. Reconciliation happens in real time. The platform can match each transaction to the right invoice automatically, so it is always clear what has been paid and what is still outstanding.

For platforms, the opportunity goes beyond better UX: every invoice paid inside your product is a transaction that can generate revenue from balances and interchange fees. Fixing the workflow gap does not just make your product stickier, it makes it profitable in a way it was not before.

The real example: How Accountable turned Belgium e-invoicing into an end-to-end workflow

Accountable, a tax and finance platform for Belgian freelancers, had built everything a self-employed professional needed to stay on top of their finances: invoicing, expense tracking, automated tax calculations. Despite covering every stage of financial management, they realised the workflow wasn’t end-to-end as payments were still happening elsewhere.

That is why they launched Accountable Banking, embedding a business account and cards directly into their product to connect invoices and payments together.

By doing that, Accountable gave Belgian freelancers everything they need in one place: unlimited e-invoices, a local IBAN, a main account and a sub-account with automatic tax reserves, and a clear, real-time view of cash flow. Tax planning stopped being a source of stress and became the seamless experience for users.

"With Accountable Banking, we're bringing those two worlds together, removing many worries and giving them space to focus on what really matters: their work."   —  Nicolas Quarré, CEO and co-founder of Accountable

E-reporting is next: The infrastructure you build now matters

The next step after e-invoicing is already on the horizon, and it goes further than most platforms have prepared for.

Right now, Belgian businesses report their transactions to FPS Finance once a year through the annual customer listing: a document that summarises every B2B transaction made over the previous twelve months. By the time the tax authority reviews it, some of those transactions are almost a year old. That’s a loooong time for fraud to go unnoticed.

From January 2028, Belgium is introducing near real-time e-reporting. Every invoice exchanged between VAT-registered businesses will automatically be shared with FPS Finance the moment it is sent. The government will see each invoice as soon as it happens, because it will be built directly into the Peppol network.

Today, Peppol connects four parties: sender, sender's Access Point, receiver's Access Point, and receiver. The 5-corner model will add FPS Finance as a fifth active participant. Every invoice that goes through Peppol will automatically send a copy to the tax authority at the same time. When the government monitors invoices in real time, gaps in your users' workflow will be visible immediately.

This is where the connection between invoices, payments, and reporting becomes critical. When invoices and payments are already connected in the same workflow, the data stays consistent, making reporting reliable and compliant.

The companies that integrate embedded banking into their software now will then have a competitive advantage. They will be ready for 2028 instead of rebuilding their processes under deadline pressure. From day one, they will have a smooth, integrated experience that keeps them stress-free when new regulations take effect.

Market opportunity: Now is the right time for your business

Belgium isn't the first country to push e-invoicing, and it won't be the last.

This represents a massive opportunity for businesses to turn regulatory change into better workflow. Your value as a platform increases because users stay in your product throughout the entire process. You also open new revenue channels: transaction fees, interchange sharing, and revenue sharing from the financial operations your users complete inside your platform.

And in Belgium, local requirements carry real weight. Businesses have clear expectations with specific payment standards and conventions. Any Belgian accountant will tell you: the structured communication reference isn't a minor formatting requirement. When it's missing or incorrect, transactions stall and finance teams spend hours fixing the problems that should never have happened. Software that handles this correctly earns trust from the first transaction.

The most efficient way to get this right is to partner with an embedded banking provider. At Swan, we hold the licences, manage AML and fraud prevention, and handle compliance from day one. As a true partner, we're close to businesses from roadmap to go to market,  anticipating regulatory shifts, and making sure the product stays compliant. As a licensed EMI across the EEA, we handle all of that so platforms stay focused entirely on their product.

The market opportunity is open and the companies that move now will own both the workflow and the market share. That's the real competitive advantage.

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