E-Invoicing for Belgian Freelancers and Self-Employed: The 2026 Peppol Rules

If you're a zelfstandige (self-employed) or freelancer in Belgium, it's tempting to assume the Peppol e-invoicing mandate is a "big company" problem. It isn't. Belgium's mandate — live since 1 January 2026 — was written with no company-size threshold and no small-business carve-out, which makes it stricter than most of the mandates rolling out elsewhere in the EU. See our complete Belgium e-invoicing guide for the full legal background; this page focuses specifically on what it means if you invoice as an individual or a one-person company.

Does the Mandate Apply to You?

If you are a VAT-registered self-employed person established in Belgium, you are in scope for the same rules as a large company: structured e-invoices for domestic B2B transactions, exchanged over Peppol in EN 16931-compliant UBL 2.1 or CII 16B, with no paper or unstructured PDF invoices accepted for B2B sales from your side.

This includes freelancers and sole traders using the small business VAT exemption scheme ("vrijstellingsregeling kleine ondernemingen" / "régime de la franchise", for businesses with turnover under €25,000). Being VAT-exempt from charging VAT on your invoices does not exempt you from the structured-invoicing obligation — you are still a VAT-registered taxable person for the purposes of the e-invoicing rule, and Belgian guidance is explicit that small-business-scheme entrepreneurs fall under the same B2B e-invoicing requirement as any other company.

What does fall outside scope:

• B2C sales — invoices to private consumers are not covered by the mandate
• Transactions with counterparties established outside Belgium (these follow cross-border rules, not the domestic mandate)
• Genuinely non-VAT activity (for example, income that isn't a taxable supply at all)

If you're unsure which category applies to a specific client relationship, this is worth confirming with your accountant rather than guessing — the distinction between "VAT-exempt but still in scope for e-invoicing" and "outside VAT scope entirely" is easy to get wrong.

What You Actually Need to Set Up

Unlike Italy's SDI or Poland's KSeF, there's no government portal to log into and manually create invoices for free at scale (Belgium doesn't run an equivalent to Greece's Timologio). In practice, a freelancer needs three things:

1. A Peppol-connected invoicing tool. Most Belgian accounting and invoicing platforms aimed at freelancers and small businesses added native Peppol sending/receiving ahead of the 2026 deadline — see our software comparison for options.
2. A registered Peppol ID, which for most Belgian businesses is simply your enterprise number (KBO/BCE number) — your software provider or access point typically handles this registration as part of onboarding.
3. A way to receive invoices too — the obligation runs both ways. If a supplier sends you a Peppol invoice, you need to be able to receive and process it, not just issue your own.

For a full walkthrough of registration and access points, see our Peppol access point providers guide.

What Changes Day-to-Day

For most freelancers, the practical change is smaller than it sounds: you're not manually building XML files. Your invoicing software generates the structured invoice from the same data you'd normally enter (client, line items, VAT treatment), and sends it via your access point. The visible difference is mostly that a PDF you email directly, or an invoice you hand over on paper, no longer satisfies the legal requirement for a B2B sale in Belgium — it needs to have gone through Peppol.

Penalties Apply to Everyone Too

Belgium's tolerance period ran through 31 March 2026; since 1 April 2026, graduated penalties apply for non-compliance — starting at €1,500 for a first offence, rising to €3,000 and then €5,000 for repeated breaches within a three-month window. There is no reduced penalty track for sole traders or small-turnover businesses; the enforcement rules are the same regardless of company size.

What to Do Now

1. Confirm your invoicing software supports Peppol sending and receiving — if you're still using a plain PDF/Word invoice template, that's the first thing to replace
2. Register your enterprise number with a Peppol access point (often bundled automatically by accounting software aimed at the Belgian market)
3. Don't assume small-business VAT exemption status excuses you — check with your accountant if you're not certain your specific activity is in scope
4. Test sending and receiving with at least one real client or supplier before you need to rely on it for a real transaction

Source

FPS Finance (SPF Finances / FOD Financiën), Belgian B2B e-invoicing guidance; VLAIO, Verplichte e-facturatie voor bedrijven vanaf 2026.