In this article, learn about:
How e-invoice mandate deadlines and formats differ across Belgium, Poland, France, and Germany
Why a document that meets one country's requirements will not work in another
When waiting on the France deadline becomes a real business risk
How a managed solution handles country format updates without involving your team
Why 2026 Is the Year E-Invoicing Gets Serious Across Europe
E-invoicing is the structured digital exchange of invoice documents between businesses, replacing paper and PDF emails with machine-readable formats that meet each country's tax and legal requirements. For most of the last decade, it was something some countries had introduced, others were planning, and most businesses could wait on. In 2026, that has changed.
In 2026 alone, three of Europe's largest trading markets are introducing mandatory e-invoicing for the first time.
Belgium, Poland, and France all have mandates going live this year. Germany required businesses to receive e-invoices from January 2025, with rules on sending e-invoices starting from 2027. The EU's ViDA initiative (VAT in the Digital Age) is pushing all member states toward a common framework by 2030.
European suppliers now face a direct question. Your invoicing process needs to meet the specific requirements of each country where you trade, on the timeline that country has set.
What Each Country Requires in 2026
All four countries are moving in the same direction: structured electronic invoices exchanged through regulated platforms. The requirements, though, differ by country.
Key deadlines at a glance:
Belgium: All VAT-registered businesses, live since January 2026
Poland: Large taxpayers from February 2026; most businesses from April 2026
France: All businesses must receive from September 2026; large enterprises must issue from the same date
Germany: Receiving required since January 2025; issuing phases in from 2027
Here is what each mandate requires in practice.
Belgium: Live since January 2026
All VAT-registered businesses in Belgium must exchange structured e-invoices via the Peppol network. The required format is Peppol-BIS, aligned with the European standard EN 16931. Belgium applied its mandate to all businesses at the same time, regardless of company size.
Poland: Phased rollout from February 2026
Poland's national e-invoicing platform, KSeF, became mandatory for large taxpayers (annual turnover above PLN 200 million) from February 2026. Most other VAT-registered businesses follow in April 2026, with micro-enterprises joining in January 2027. All invoices must be submitted through KSeF in FA(3) XML format before they are legally considered delivered. Poland uses a clearance model: the tax authority approves each invoice before it reaches the buyer.
France: Phased from September 2026
From September 1, 2026, all French businesses must be able to receive e-invoices. Large enterprises (turnover above €1.5 billion) and mid-sized businesses (€250 million to €1.5 billion) must also send e-invoices for domestic B2B transactions from the same date. Smaller businesses have until September 2027 to comply with the sending requirement. France accepts three formats: UBL, CII, and Factur-X, a format that combines machine-readable data with a standard PDF.
If your business trades in France, September 1 is now weeks away. Many businesses have left their implementation late, and e-invoicing solution providers are already seeing more requests than usual as the deadline gets closer. Starting now gives you time to test your setup and fix any issues before the mandate goes live. Waiting means joining a large group of businesses all trying to implement at the same time, with longer wait times for support at exactly the moment you need it most.
Germany: Receiving since January 2025, issuing from 2027
German businesses have been required to accept e-invoices since January 2025. The obligation to send them starts from January 2027 for companies with turnover above €800,000, and from January 2028 for all businesses. The main formats are XRechnung and ZUGFeRD, both meeting the EN 16931 standard.
The Format Problem
Each mandate specifies different formats and platforms. Belgium requires Peppol-BIS via the Peppol network. Poland's KSeF platform uses FA(3) XML, with the tax authority approving each invoice before delivery. France accepts three options: UBL, CII, and Factur-X, a format that combines machine-readable data with a standard PDF. Germany works with XRechnung and ZUGFeRD, both aligned to EN 16931.
Businesses already using EDI invoicing to exchange documents with retail trading partners will recognise the principle of format-specific document exchange. Mandatory e-invoicing extends this to all B2B transactions, across every trading partner, in the format each country's tax authority requires.
A document that meets one country's requirements will not necessarily meet another's. For a supplier active across two or three of these markets, managing format requirements by hand creates ongoing risk. Spain, Slovakia, and Norway will introduce their own mandates in the coming years, adding more formats to the list.
Keeping up with changes over time is the harder part. Requirements change, platforms update, and more countries introduce mandates. SPS Commerce tracks all of this across 50+ countries, updating the solution centrally so connected businesses stay current without having to follow every change themselves.
What This Means for Your Operations
Mandatory e-invoicing changes how finance and operations teams handle documents day to day. Paper invoices and standard PDF emails are no longer accepted in countries where mandates are live. In Belgium and Poland, every invoice sent to or received from a trading partner must go through the required platform in the required format, or it has no legal standing.
For suppliers, the key operational questions to work through:
Do your current invoicing processes meet each country's requirements?
Can your ERP or accounting system produce the correct format for each market?
Are you able to receive and process e-invoices from trading partners in mandate countries?
Do you have compliant e-archiving in place? Most mandates include archive requirements alongside the exchange obligation.
Invoicing automation handles the format conversion and platform submission for each country, removing the manual steps that slow teams down and create errors. One market is manageable without it. Add a second or third with its own format and update schedule, and the amount of work grows quickly.
Choosing an E-Invoicing Solution for Multiple Markets
E-invoicing software ranges from basic single-country tools to managed solutions that cover multiple markets and update automatically when requirements change. Managing one country's requirements internally is possible. Doing this across three or four markets, each with its own format and update cycle, becomes too much for most internal teams to manage well.
What to look for in an e-invoicing solution:
Coverage across all the countries where you trade, not just one or two
Automatic updates when a country's requirements change, without a change request from your team
Peppol Access Point certification for markets that require it
Support for both legal compliance and your trading partners' own invoice requirements
SPS Commerce manages e-invoicing compliance across 50+ countries, including Belgium, Poland, France, and Germany. The solution covers both legal compliance (tax and regulatory requirements) and commercial compliance (the specific document requirements of your trading partners). When country requirements change, SPS updates the solution centrally, without requiring any action from your team.
SPS is also a certified Peppol Access Point, the shared network that connects businesses across Europe for e-invoicing, and the standard behind Belgium's mandate.