DORA reporting to the AFM in 2026: how Dutch firms can convert Excel Register of Information files to XBRL-CSV

If you are looking for DORA reporting software in the Netherlands for your AFM Register of Information submission, the key change for 2026 is simple: the AFM no longer accepts Excel for the 2026 Register of Information filing. For this cycle, the AFM requires firms to submit the file in XBRL-CSV format, uploaded as a ZIP file through the AFM Portal. In 2025, the AFM offered a one-time conversion service from Excel to XBRL-CSV, but that service is no longer available for the 2026 submission.

That means many compliance, risk, and regulatory reporting teams now need a practical way to turn their existing Excel RoI templates into the correct XBRL-CSV DORA filing format for the Dutch regulator. This is exactly the problem Olive Octagon is built to solve: Olive Octagon converts a set of Excel Register of Information templates into the XBRL-CSV output needed for DORA reporting workflows.

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What changed for AFM DORA reporting in 2026?

The AFM has stated that, for the 2026 Register of Information request, firms must submit the RoI themselves in the correct format. The AFM’s published guidance is explicit: for 2026, it is only possible to submit the Register of Information in XBRL-CSV format. The regulator also says that if it receives the register in another format, it cannot forward it and will need to ask for a new version.

For firms that managed DORA RoI data in spreadsheets last year, this creates a very specific software need:

• Excel to XBRL-CSV conversion
• AFM-compatible DORA submission files
• Support for the EBA taxonomy
• Correct ZIP packaging for upload to the AFM Portal

That’s why many Dutch firms are now searching for an AFM Register of Information converter that allows them to report DORA XBRL-CSV to the AFM in the Netherlands.

What does the AFM require for the 2026 Register of Information submission?

According to the AFM, if your firm is required to submit the Register of Information, the reporting obligation is available in the AFM Portal in January 2026, and you can only upload the document in XBRL-CSV format as a ZIP file. The AFM also notes that firms receive feedback from the EBA through that reporting workflow.

The AFM also gives specific guidance on what a suitable converter must do. If you use software to convert your RoI into XBRL-CSV, the AFM says you should check that:

• it converts to XBRL-CSV, not iXBRL
• it supports the EBA taxonomy
• the resulting XBRL-CSV file meets the required technical format expectations

That is important because not every XBRL tool is suitable for DORA Register of Information reporting. Many general-purpose XBRL tools are built for other filing regimes, while DORA RoI reporting has its own data model, technical package, validation rules, and sample files published by the EBA.

Why Excel is still central, even though AFM now requires XBRL-CSV

In practice, many firms still maintain their DORA Register of Information in spreadsheet form. That is not surprising. The 2024 ESA dry run used Excel templates, and the EBA published Excel-based materials and tools during that preparatory phase.

So the real operational challenge for 2026 is not whether teams use spreadsheets internally. It is how they convert those spreadsheet-based RoI records into the regulator-ready XBRL-CSV package required by the AFM.

This is where firms often get stuck:

• mapping Excel fields to the DORA data model
• handling the technical structure required for XBRL-CSV
• packaging files correctly for submission
• avoiding format errors that trigger rework close to the deadline

Olive Octagon’s approach: purpose-built Excel-to-XBRL-CSV software for DORA RoI

Olive Octagon is designed for the specific use case Dutch firms now face: converting a set of Excel DORA Register of Information templates into an XBRL-CSV output for AFM submission workflows.

That matters because firms do not need just any “XBRL software.” They need DORA Register of Information software that is relevant to:

• the AFM
• the Netherlands
• the EBA taxonomy
• the XBRL-CSV filing format
• the reality that their source data often starts in Excel

If your internal process is still spreadsheet-based, Olive Octagon gives you a direct bridge from Excel RoI templates to XBRL-CSV for DORA reporting, without forcing your team to rebuild the whole process around generic XBRL tooling.

What to look for in DORA XBRL-CSV software in the Netherlands

If you are comparing options for AFM DORA reporting software, these are the practical questions to ask:

1. Is it built for XBRL-CSV, not just “XBRL”?

The AFM explicitly says the file must be XBRL-CSV, not iXBRL. A tool that only supports other XBRL formats is not enough.

2. Does it align with the EBA reporting framework?

The EBA provides the official technical package for DORA RoI reporting, including the data model, taxonomy package, sample files, filing rules, and validation resources. Your software should be designed around that framework.

3. Does it fit an Excel-first operating model?

Most compliance teams are not trying to abandon Excel overnight. The best DORA reporting software is the one that lets you keep your operational spreadsheets and reliably convert them into the submission format the AFM wants.

4. Is it suitable for recurring annual DORA submissions?

The AFM states that the Register of Information is requested annually. This is not a one-off process, so repeatability matters.

Timing matters: the 2026 AFM deadline

The AFM said that firms required to submit the Register of Information would receive a formal request in December 2025 and asked for the complete register no later than 22 March 2026.

That creates a narrow filing window. If your team is still working from Excel-based RoI templates, leaving conversion until the last minute increases the risk of avoidable technical issues and re-submissions.

FAQ: AFM DORA Register of Information filing in 2026

Can I submit the 2026 Register of Information to the AFM in Excel?

No. The AFM says that for 2026, the Register of Information can only be submitted in XBRL-CSV format. In 2025, the AFM facilitated a one-time conversion service, but that does not apply to the 2026 filing.

What format does the AFM require for DORA RoI submission?

The AFM requires the RoI to be uploaded as an XBRL-CSV file in a ZIP package via the AFM Portal.

What should an AFM DORA XBRL-CSV converter support?

The AFM says the converter should produce XBRL-CSV (not iXBRL), support the EBA taxonomy, and generate output that meets the required technical format.

When is the AFM deadline for the 2026 Register of Information?

The AFM asked firms to submit their complete Register of Information by 22 March 2026.

Why are firms searching for Excel to XBRL-CSV software for DORA?

Because many firms still maintain their Register of Information in spreadsheet form, but the AFM now requires a formal XBRL-CSV submission.

Need DORA reporting software for the AFM?

If your team is preparing a 2026 AFM DORA Register of Information submission and your source data lives in Excel, Olive Octagon is built for the exact gap between those two realities: Excel in, XBRL-CSV out.

For Dutch firms searching for:

• DORA reporting software Netherlands
• AFM Register of Information software
• Excel to XBRL-CSV converter AFM
• DORA XBRL-CSV software
• AFM RoI converter
• Register of Information XBRL-CSV tool

Olive Octagon is the specialist solution designed around that workflow.

Try our DORA reporting tool for free right now, or get in touch below to request a product demonstration from our sales team.