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Is iXBRL filing with the Chamber of Commerce mandatory? Discover the ultimate (i)XBRL solution for your Chamber of Commerce financial statements

Large companies in the Netherlands are required to file their financial statements digitally with the Chamber of Commerce (KVK) in XBRL or iXBRL format (via Standard Business Reporting/SBR).

SureSync offers a plug-and-play (i)XBRL solution that converts your existing data or PDF of the financial statements into a compliant (i)XBRL file, which you can then securely file with the KVK yourself. If the KVK or Digipoort rejects a submission, the portal translates the error message into plain language and explains what you need to do—without any additional IT complexity. Starting at €1,700 per year.

Schedule a consultation right away How does our solution work?
Blog Image: Kel

Why SureSync Reporting?

From source data to validated (i)XBRL filing

Our software handles the entire process of filing financial statements: from existing data or a PDF to a complete (i)XBRL file that you can file with the Chamber of Commerce yourself via a secure connection to Digipoort. Manual tagging and additional accounting costs are unnecessary, as is technical expertise. Our solution takes the complexity out of SBR and (i)XBRL.

Easy & Reliable

An error message from the Chamber of Commerce (KVK) or Digipoort is usually a technical code. The portal translates it into plain language, along with advice on how to resolve the issue. If you’re unable to resolve it, our service desk will assist you within the terms of our SLA. Are you filing for multiple entities? A single overview shows the status for each set of financial statements.

Efficient & Future-Proof

No expensive software and no heavy strain on your IT infrastructure. We automatically process changes to the Dutch Taxonomy, so you always report in accordance with the Chamber of Commerce’s current requirements. Would you prefer to submit your reports from your own system? Then you can connect via our OpenAPI. Do you submit in XBRL? The portal pre-fills your annual financial statements with last year’s data, and the search function lets you jump directly to the section you’re looking for.

The (i)XBRL expert in the Netherlands

Every report goes through an (i)XBRL-certified validator before it is submitted to the Chamber of Commerce. A complete audit trail shows who did what and when. In addition, we have ISO 27001 certification, MFA login, and a secure Digipoort connection. We are the only Dutch organization that is (i)XBRL-certified. You can read more here.

How does the XBRL solution work?

  1. The reporting entity uploads the financial statements to the SureSync portal. The portal converts them into an XBRL file.
  2. The reporting entity sends the XBRL file to the auditor for signing.
  3. The auditor adds a digital auditor’s signature and an auditor’s report. The reporting entity uploads the three files to the SureSync portal.
  4. The files are validated by the SureSync portal.
  5. The reporting party can track the progress in the SureSync portal. The entire validation process is clearly indicated.
  6. The portal automatically submits the files to the Chamber of Commerce (KVK). If an error message is returned by the KVK or Digipoort, you’ll see it in plain language, along with advice on how to resolve it. You can view the status in the portal.
  7. If desired, the reporting party can download a PDF file.

Schedule a consultation right away

In a brief conversation, we’ll work with you to explore how your financial statements can be filed with the Chamber of Commerce easily and securely via SBR. We’ll discuss your current workflow, answer any questions, and show you what SureSync can do for you.

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FAQ

As iXBRL specialists, we regularly receive questions about the electronic filing of financial statements with the Chamber of Commerce. Here you’ll find the most frequently asked questions and answers to help you understand the process and your obligations. Can’t find your question here? Contact us, and we’ll be happy to help!

FAQ Kelly

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An organization is considered a large legal entity if, on two consecutive balance sheet dates, it meets two of the following three criteria:

  • Balance sheet value > €25 million
  • Net revenue > €50 million
  • Number of employees > 250

The content of the financial statements remains unchanged. What does change, however, is the method of submission. Large legal entities are required to file their financial statements digitally and in a structured format so that they can be processed automatically.

While micro, small, and medium-sized legal entities have been required to comply with this for some time, this requirement now also applies to large legal entities. The financial statements are submitted in an electronic format via Standard Business Reporting (SBR).

Starting with the 2025 fiscal year, all large companies registered with the Chamber of Commerce (KVK) are required to file their financial statements electronically via SBR. Have you approved your financial statements? If so, you are required by law to file them with the KVK within eight days. For more information, click here.

If your financial statements are prepared in accordance with NL GAAP, you can choose between two electronic formats: XBRL or iXBRL.

XBRL is a file consisting of purely structured data without visual formatting. It is intended to be processed directly by software (machine-readable).

iXBRL (Inline XBRL) is a visually readable document (XHTML) that you can open in a browser, just like a web page. The XBRL data is “embedded” in this document via tags. This makes the file readable by both people and computers.

SureSync supports both XBRL and iXBRL.

In that case, you’ll usually receive a technical error message from the Chamber of Commerce (KVK) or Digipoort. In the SureSync portal, we translate that into plain language and provide guidance on how to resolve the issue. If you’re still having trouble, our service desk will be happy to assist you.

SureSync Reporting supports the filing of annual financial statements in accordance with the KVK Annual Financial Statements 2025 NLGAAP entry points for the following categories of legal entities and disclosure documents:

  • Limited partnerships and general partnerships
  • Cooperatives
  • Fundraising organizations
  • Large legal entities
  • Small legal entities – disclosure documents
  • Micro legal entities – publication documents
  • Medium-sized legal entities
  • Medium-sized legal entities – plus
  • Medium-sized legal entities – publications
  • Nonprofit organizations – medium and large legal entities
  • Foundations
  • Authorized public housing institutions

This means that SureSync Reporting is configured to generate the correct SBR/XBRL entry points and support technical reporting structures for the above categories, ensuring that electronic filing with the Chamber of Commerce proceeds correctly.

In addition to these standard entry points, additional entry points can be integrated to support other reporting or filing scenarios.

You can start preparing now: with our sustainability solutions, you can collect the data and report in accordance with the CSRD (Corporate Sustainability Reporting Directive). You cannot yet file sustainability information as part of your financial statements, because the requirement to do so has not yet taken effect in the Netherlands. Once it takes effect for your organization, we’ll incorporate the CSRD into the tagging and filing of your financial statements. Want to get started now? Check out our sustainability solutions.

Validating and filing financial statements in (i)XBRL via SureSync Reporting starts at €1,700 per year.