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XBRL Reporting Requirements: What Companies Need to Know
Financial reporting is undergoing a fundamental shift. Regulators globally are moving away from static, document-based filings toward structured, data-driven reporting.
One clear example of this is XBRL (eXtensible Business Reporting Language), a standardized format that allows financial information to be submitted in a machine-readable way. It is changing not just how companies file information, but how regulators receive, analyze and act on it.
For businesses operating across multiple jurisdictions, XBRL is no longer a future consideration. It is already embedded in many reporting frameworks and continues to expand at pace.
What is XBRL?
XBRL is a digital reporting language that allows financial and tax data to be tagged in a structured format. It is based on XML (extensible Markup Language) and is specifically designed to structure, store and exchange financial information.
Rather than submitting static documents, companies tag individual data points (for example revenue, assets or tax adjustments), align them to a regulator-defined taxonomy, and submit filings as structured, machine-readable data (typically in XBRL or iXBRL format) that can be automatically processed.
These filings are not traditional documents like PDFs or Excel spreadsheets, but structured files designed for system-to-system reporting.
XML, XBRL and iXBRL: understanding the difference
Although often referred to collectively as “XBRL”, requirements vary in practice.
- XML (eXtensible Markup Language) is the underlying technology used to structure data in a machine-readable format
- XBRL (eXtensible Business Reporting Language) is a financial reporting standard built on XML that applies defined tags and taxonomies to financial information
- iXBRL (Inline XBRL) combines XBRL tagging with a human-readable document, allowing a single filing to be viewed by both people and systems
This distinction matters, particularly for multinational businesses, as the required format can differ depending on the regulator, filing type and submission platform.
Why is XBRL being introduced?
The move towards XBRL is being driven by regulators seeking more consistent, reliable and usable data.
Key drivers include:
- Improved transparency: Provides greater visibility into corporate financial information
- Greater accuracy: Built-in validation rules reduce reporting errors
- Regulatory efficiency: Automation enables faster review and audit processes
- Real-time or near-real-time oversight: Supports more frequent and granular reporting
- Data comparability: Enables consistent comparison across companies and jurisdictions
- Digital supervision: Supports more proactive, data-driven regulatory oversight
- AI-driven analytics: Unlocks deeper insights through automated data analysis
Increasingly, structured reporting is also viewed as an important foundation for advanced regulatory analytics, automation, and future digital reporting initiatives, including sustainability and ESG reporting frameworks.
How reporting is changing
XBRL does not just change the format of submission; it changes when and how data is structured.
Under a traditional model, financials are prepared, converted into static formats and submitted periodically. Under an XBRL-based approach, data needs to be structured earlier, aligned to specific taxonomies and validated before submission.
For legal, corporate secretarial and compliance teams, this introduces greater expectations around:
- Consistency of data across finance, tax and statutory filings
- Alignment between different reporting outputs submitted to regulators
- Stronger internal governance and controls over the accuracy of reported data
What does the XBRL process involve?
While requirements vary by jurisdiction, the core process typically includes:
1. Data Preparation: Extract financial and tax data and ensure it aligns with local requirements
2. Tagging and Mapping: Map data points to the relevant taxonomy and apply tags
3. Validation: Run checks and resolve errors before submission
4. Submission: File through the regulator’s designated platform or portal
5. Ongoing maintenance: Update for taxonomy changes and evolving rules
Whose responsibility is XBRL compliance?
XBRL reporting sits across multiple functions and does not always have a single owner.
Finance and tax teams are responsible for the underlying data, IT supports extraction and systems integration, and legal, compliance and corporate secretarial teams play a key role in oversight and ensuring that local filing obligations are met.
In many cases, external providers are also involved, particularly where requirements differ across jurisdictions.
In practice, the challenge is less about ownership and more about coordination. Without a joined-up approach across functions and jurisdictions, inconsistencies can arise quickly, increasing the risk of errors or non-compliance.
Which jurisdictions have implemented XBRL?
Adoption of XBRL and iXBRL for statutory financial statement filing is increasing globally. While requirements vary, the trend is clear – a growing number of company registries and government authorities now require, or are moving towards requiring, structured digital financial reporting.
Although the underlying objective is similar, implementation differs considerably in terms of format, filing thresholds, taxonomies, software requirements and submission processes.
For example:
- United Kingdom: Companies are required to file corporation tax returns and accompanying accounts with HMRC in iXBRL format. Further reforms are underway, with Companies House introducing mandatory digital accounts filing in iXBRL from April 2028.
- Singapore: Many companies are required to file financial statements with ACRA using structured XBRL-based reporting, although the filing requirements and templates vary depending on company size and type.
- Malaysia: The Companies Commission of Malaysia (SSM) has implemented XBRL-based digital financial reporting through its Malaysian Business Reporting System (MBRS).
- South Africa: Qualifying entities are required to submit annual financial statements to the Companies and Intellectual Property Commission (CIPC) using iXBRL.
- Netherlands: One of the most mature digital reporting environments globally, using Standard Business Reporting (SBR) and XBRL to streamline reporting to multiple government authorities.
- India: XBRL reporting requirements apply to specified categories of companies through the Ministry of Corporate Affairs, with filing obligations determined by company type and reporting criteria.
Rather than a single global standard, what is emerging is a patchwork of local rules, formats and regulatory expectations.
Key challenges for multinational businesses
As XBRL requirements expand, several challenges are becoming more pronounced:
- Fragmentation across jurisdictions (formats, taxonomies and timelines)
- Data consistency issues between finance and tax reporting
- Internal capability and resourcing gaps
- Keeping pace with regulatory change
Conclusion
XBRL reflects a broader move towards structured, data-led compliance.
As requirements continue to expand, organizations that take a more coordinated approach to data, processes and governance will be better placed to manage complexity and reduce compliance risk.
Vilius Kalvatis
Senior Legal Team Manager, Mercator® by Citco, Citco Mercator, UAB
How Mercator® by Citco Can Help
The adoption of XBRL is part of a broader shift towards digital reporting and data-driven compliance.
With coverage across 185+ jurisdictions, Mercator® by Citco helps organizations stay on top of regulatory developments, understand local filing requirements and maintain oversight of global compliance obligations.
For more information, contact contact [email protected].
