Real-World Lessons from Global E-Invoicing Mandates: Your Questions Answered

As e-invoicing becomes a global standard, businesses are facing a complex web of new mandates and deadlines. On March 24, 2026, we hosted a webinar with experts from Comarch and PwC to break down the first waves of mandate implementations and discuss what businesses must prepare for next. 

The session sparked a lot of discussion, and we weren’t able to address every question during the live event. That’s why we've compiled the remaining questions and had our experts answer them below.

1. What specific lessons have organizations that have already implemented e-invoicing learned so far? Are there any case studies or best practice examples you can share to help other companies avoid common mistakes?

First and foremost, you should organize and evaluate your data early. Furthermore, it is crucial to ensure your team is fully available to troubleshoot and fix issues during the “hypercare” phase immediately after you first go live.

2. How should organizations prioritize resources and efforts to meet the 2026–2027 e-invoicing deadlines while avoiding team overload?

To avoid internal overload and streamline your transition, you can outsource the technical setup to specialized providers, join available pilot phases to refine your data processes early, and implement a single base invoice specification that can be adapted for all EU countries.

3. Will there be any updates on France? Are there expected delays or grace periods, and what might they mean?

While a three-month postponement of the September go-live is legally possible, our internal assessment suggests it is unlikely.

Learn more about e-invoicing in France

4. What has been the typical timeline for implementation in the UAE?

The UAE e-invoicing mandate begins with a pilot phase on July 1, 2026, with full implementation rolled out in phases. Large businesses go live on January 1, 2027. Typical project implementation time varies, but it generally takes around 3–5 months.

Learn more about e-invoicing in the UAE

5. Will Comarch also be certified by the government in Slovakia?

Comarch has been aligning its platform with the specific technical requirements set by the Slovak Financial Administration. We are scheduled to submit our formal accreditation application to the Financial Directorate in the coming weeks, as the sworn translation of the required documents is currently in progress.

Learn more about e-invoicing in Slovakia

6. Do you expect eReporting in Belgium to be similar to France’s or to take a lighter touch?

It is widely expected that the Belgian e-invoicing and e-reporting framework will be significantly less complex than the French model, as the Belgian mandate places less focus on the invoice lifecycle.

Learn more about e-invoicing in Belgium

7. When will the Netherlands’ e-invoicing mandate go live?

Based on the evaluation report submitted to the Dutch Parliament in March 2026, the Netherlands is most likely to go live with mandatory domestic B2B e-invoicing in January 2030.

Learn more about e-invoicing in the Netherlands

If you need help navigating varying regional compliance laws, our experts are here to help. Reach out to our team to ensure your infrastructure is ready for 2026 and beyond.