Best Invoicing Software in Belgium for the 2026 Peppol Mandate

Since January 2026, Belgian B2B invoicing must go through the PEPPOL network. If you are a freelancer, sole trader, or run a small company, you need software that can send and receive Peppol e-invoices out of the box. This is a practical round-up, not a generic comparison.

We are focused on tools that are actually available in Belgium today, have a certified Peppol access point, and serve businesses that are not running a finance department.

For a deeper look at what Peppol is and why it is now mandatory, read our complete guide to the Belgian e-invoicing mandate.

What to look for in 2026

Before diving into the tools, here is the minimum bar for a Belgian business in 2026:

• Peppol send and receive: both directions matter. Receiving is mandatory from January 2026, not just sending.
• Certified access point: the software must connect through a certified Belgian Peppol access point. Using a generic PDF export does not count.
• UBL / BIS 3.0 format: the Belgian mandate requires structured XML (UBL 2.1, BIS 3.0 profile), not a scanned PDF.
• Registration handled for you: getting your enterprise number registered on the Peppol network should not require manual steps.

Beyond compliance, think about your day-to-day: OCR for incoming documents, a dashboard showing what is unpaid and what VAT you owe, and a way to give your accountant read-only access without paying for an extra seat.

The tools worth considering

Feen: built for Belgian SMEs and freelancers

Feen is a Belgian invoicing and document platform that handles Peppol through a partnership with Recommand.eu, a certified Belgian access point. Setup is a single click. It reads incoming documents with OCR and AI, gives you a live cash and VAT dashboard, and lets your accountant log in without an extra charge.

Pricing starts at €7/month ex-VAT for the Inbox plan (receive Peppol invoices, manage incoming documents). The Pro plan is €15.70/month ex-VAT (€19 incl. VAT) and includes outbound invoicing, quotes, credit notes, OCR, the VAT dashboard, and multi-user access. Bank statement import works via CSV or PDF upload, with live bank sync coming soon.

What Feen does not have yet: recurring invoices (coming soon), live API integrations (coming soon), multi-currency (coming soon). If those are blockers for your business, read on.

Internal links: Feen vs Billit | Feen vs Dexxter | Feen vs Exact Online | Best software for self-employed

Billit: strong Peppol coverage, volume-metered pricing

Billit is a Belgian-made platform serving freelancers up to enterprise and also white-labelling to accountants. Peppol send and receive are included. The free plan gives Peppol send only. Their Starter plan starts at €7.50/month ex-VAT (capped at 25 documents). Premium tiers run from €17/month upward and are slider-priced by document volume, which makes cost projection harder.

The platform has strong integrations with Belgian accounting packages (30+) and 180+ integrations overall. It is a good fit if you want to stay inside a connected Belgian ecosystem and your accountant already uses it.

Watch out for: quarterly or annual billing only (no monthly rolling), per-document metering on higher tiers, and an opaque volume-to-price mapping on the premium range.

Compare: Feen vs Billit

Dexxter: sole proprietorships, Belgian-first

Dexxter targets Belgian sole proprietorships specifically. It does not support BV or NV structures. Peppol send and receive are included. Pricing is €20/month (monthly) or €15/month (annual) for non-VAT liable, and €25/month (monthly) or €20/month (annual) for VAT-liable businesses, ex-VAT.

The 30-day trial and 60-day money-back on annual plans make it low-risk to try. It has 400 to 500 accountant partners in Belgium and a fine-protection guarantee for its calculations. The main limitation is that it serves strictly sole proprietorships only, with bank connections capped at two and no public API.

Compare: Feen vs Dexxter

Exact Online: accountant-first, enterprise scale

Exact Online is the dominant Benelux accounting package, used by 400,000+ SME files managed through 6,700 accountants. Their Peppol integration is solid. The entry-level accounting plan starts at €49/month ex-VAT, and their suite runs up to €299/month ex-VAT for premium tiers, with extra users at €49/month each and an implementation fee of €500 to €2,500.

This is the right tool if your accountant already works in Exact Online and you want everything in one ecosystem. It is significantly over-specced (and over-priced) for a freelancer or small team that just needs to invoice and receive Peppol documents.

Compare: Feen vs Exact Online

Octopus: accountant portal, client pays the licence

Octopus is a Belgian accounting platform where the accountant subscribes to the portal (€21/month for the accounting program) and the SME client pays a separate client licence. Peppol is free in all licences. The model is efficient if your accountant is already on Octopus; otherwise the onboarding requires going through their partner network. There is a €50 one-time setup fee and billing is annual.

Compare: Feen vs Octopus

Winbooks: traditional accounting software going digital

Winbooks is a long-established Belgian accounting package used predominantly by accountants. Peppol is available as a paid add-on (send €4.95 to €9.95/month, receive €5.95 to €19.95/month, send+receive €9.95 to €24.95/month), on top of software licences that run from €60/month for the classic tier. OCR is a separate cartridge at €0.12 to €0.39 per invoice.

Compare: Feen vs Winbooks

Quick comparison table

Prices ex-VAT, HTVA. Always verify current pricing on the vendor's website.

How to choose

You are a freelancer or sole trader who just needs to be compliant: Feen Inbox at €7/month covers Peppol receive. Upgrade to Pro at €15.70/month ex-VAT when you need to send invoices and want OCR on your incoming documents.

You are a sole proprietorship in Belgium and want a dedicated tool: Dexxter was built specifically for you. The 30-day trial costs nothing.

Your accountant already works in a specific package: check with them first. If they are on Octopus, Exact Online, or Winbooks, using the same ecosystem reduces friction and manual re-entry.

You are a growing SME with 5+ users and complex invoicing workflows: Billit's premium tiers or Exact Online are worth evaluating, with the caveat that document-volume metering and per-user pricing add up quickly.

Already know what you need? Send your first Peppol invoice with Feen in under 5 minutes.

FAQ

Is Peppol invoicing mandatory for all Belgian businesses? Yes. Since January 1, 2026, all VAT-registered businesses in Belgium must be able to send and receive B2B invoices via the PEPPOL network. Fines can reach €5,000 per offense.

Can I use a PDF invoice instead of a Peppol e-invoice? No. The 2026 mandate requires structured UBL/XML format delivered through a certified Peppol access point. A PDF emailed to a client is no longer compliant for B2B transactions.

What is the cheapest way to become Peppol-compliant? Feen's Inbox plan at €7/month ex-VAT covers Peppol receive, which is the minimum requirement. To also send Peppol invoices (which you will need to do), the Pro plan at €15.70/month ex-VAT handles both directions.

Do I need a separate Peppol registration? No, if your software handles it. Feen, Billit, and Dexxter all handle PEPPOL registration as part of onboarding. You do not need to contact the government directly.

Is invoicing software tax-deductible in Belgium? Yes. Invoicing software is a professional expense and fully deductible. In Belgium, sole traders and companies can deduct it at 100% as a professional cost.