If your customers operate in markets with active or upcoming mandates, e-invoicing should already be on your roadmap. The earliest deadlines in Europe have already gone, the next wave is coming in 2027, and the EU-wide ViDA requirements land by 2030.

Most SaaS teams underestimate the lead time required to build, test, and roll out e-invoicing functionality across multiple jurisdictions.

Adding it to the roadmap one or two years ahead of your customers' deadlines is a realistic minimum.

ViDA, short for VAT in the Digital Age, is a legislative package from the European Commission designed to modernise the EU's VAT system.

It introduces mandatory e-invoicing and near-real-time digital reporting for all cross-border B2B transactions within the EU by 2030, and it allows individual member states to make e-invoicing mandatory for domestic transactions too.

For SaaS companies, ViDA does two things at once: it accelerates the adoption of e-invoicing across Europe, and it introduces a real-time reporting layer that most products have not yet been built to handle.

Peppol is a network and a set of standards that allow businesses to exchange electronic documents, including invoices, securely and interoperably across borders. It is not the same as e-invoicing.

E-invoicing is the broader concept of exchanging invoices in a structured digital format. Peppol is one of the most widely adopted infrastructures used to do that, particularly across Europe.

A SaaS company can support e-invoicing through Peppol, through national networks, or through both, depending on the markets it serves.

A national mandate is a legal requirement set by an individual country, specifying who must send and receive e-invoices, in what format, and through which channels. Peppol is a cross-border network that many European countries have adopted as either the required or recommended channel for meeting those mandates.

The two are connected but distinct. A SaaS company supporting customers in multiple European countries usually needs both: alignment with each country's specific requirements, and connectivity through Peppol where it applies.

Not every SaaS company, but more than currently do.

The question is whether your customers should be able to invoice through compliant electronic formats, and whether your software is positioned in the workflow where that happens.

ERP, accounting, billing, and finance-adjacent SaaS products almost certainly need it.

Adjacent categories like CRM, project management, or vertical SaaS often need it too, because customers increasingly expect end-to-end invoicing to be part of the product they're already using.

It depends heavily on whether the team builds it in-house or partners with a specialised provider.

Building in-house, especially across multiple markets, typically takes 12 to 24 months and ongoing engineering investment to maintain compliance as regulations evolve.

Partnering with a specialised provider can shorten the timeline considerably: with Maventa, for example, integration through the API typically takes days to weeks rather than months.

The right choice depends on the strategic weight your product places on invoicing infrastructure versus your core domain.

Three risks tend to come up. The first is regulatory churn. E-invoicing rules change frequently across European markets, and keeping a self-built solution compliant requires permanent engineering attention. The second is the multi-market problem. Each country has its own formats, reporting requirements, and connections to national networks. Building once is rarely enough. The third is the maintenance tail. Even after the initial build, support, monitoring, error handling, and certification across networks like Peppol continue to draw engineering capacity away from the core product.

A few things tend to matter most. Coverage of the markets your customers operate in today and the ones you plan to expand into. A modern, developer-friendly API that fits your existing stack rather than working against it. Support for the main e-invoicing formats and networks, including Peppol where relevant. A clear position on ViDA and digital reporting, since these will shape the next few years.

And, less tangibly, a partner that understands what it means to build software, not just to push e-invoices through a pipe.

When a national mandate takes effect, businesses in that country are required to send and receive e-invoices in the prescribed formats by the deadline. If your software is the system your customers use to invoice, they will expect it to support the new requirement.

The risk for SaaS companies is that customers who can't issue or receive compliant invoices through their existing product start looking for one that lets them. The window between a mandate being announced and a mandate being enforced is the practical planning horizon for most product teams.

Several non-EU European countries have already moved on e-invoicing, including Norway, where Peppol is well established for B2G and is being extended further.

The broader pattern is that European e-invoicing adoption is no longer limited to the EU. SaaS companies serving Nordic, UK, or Swiss customers should not assume that being outside the EU means being outside the trend. Many of the same standards, including Peppol, are gaining traction across the wider European market.