Country-by-Country Reporting: OECD Flags Errors MNEs Must Fix

The Country-by-Country (CbC) Report is one of the strongest tools in the OECD’s Base Erosion and Profit Shifting (BEPS) Action Plan. It shows where a multinational enterprise (MNE) group operates. It shows how much revenue the group earns in each place, and how much tax it pays there. That makes it a data-driven tool of accountability.

But as with any compliance regime, the devil is in the details.

The OECD shared fresh findings in its May 2025 update. They confirm what many tax professionals had quietly suspected. Many CbC reports filed by MNEs carry avoidable errors. Some are technical. Some are serious. These are not just administrative slip-ups. They can distort a risk assessment, trigger a needless audit, or even jeopardize the exchange of tax information between two states.

Let me set out what this means, and why it matters now.

The Ideal vs. The Reality: What CbC Reports Were Meant to Achieve

When the CbC framework launched, the aim was clear. Tax authorities were to get a high-level snapshot. The snapshot shows how profits, taxes, and business activity are spread across jurisdictions at the world’s largest companies.

At its best, the report lets a tax administration spot a mismatch. High profits in a low-tax jurisdiction, with few employees, are one example. The authority can then assess transfer pricing risk before it grows into a long audit or litigation.

Data quality decides whether the tool works. If the numbers do not line up, the analysis fails. If the format is wrong, it fails too. A filing that is inconsistent or inaccurate muddies the water. It does not clear it.

What’s Going Wrong: A Forensic Look at the Most Common Errors

The OECD’s list of recurring errors is long. It is also revealing. Formatting and typos are only part of it. The errors run from the wrong use of Tax Identification Numbers (TINs) to mismatches between Table 1 and Table 2 to the wrong reporting year. They include the use of more than one currency. They include breaches of the XML schema rules, and those breaches block the automated exchange of data.

Take one common error: reporting more than one currency in Table 1. The rule is that all financial data appears in the functional currency of the Ultimate Parent Entity. Break that rule and an automated system may reject the report. Worse, it may misread the data.

Consider next the wrong labeling of permanent establishments. This is a technical error, but it can carry legal weight. A jurisdiction may not recognize the entity in the format submitted.

Then there is the revenue mismatch. Total Revenue should equal Unrelated Party Revenue plus Related Party Revenue. When it does not, the integrity of the whole report is in question.

These are more than spreadsheet errors. They are red flags. They undermine the purpose of CbC reporting.

Why This Matters Now: Risk, Reputation, and Regulatory Scrutiny

For many tax administrations, and especially in developing economies, the CbC report is the fullest view they get of a foreign MNE’s operations. An inaccurate report does more than waste their time. It can erode trust. It can delay legitimate compliance work.

The cost falls on the company too. Inaccurate reporting can lead to audit triggers, reputational risk, and, in some jurisdictions, penalties. Tax authorities now share insights across borders. That lifts the stakes well above what the paper shows.

Tax administrations are also getting better at this. Many are upgrading their XML validation tools. Even a small inconsistency can now be flagged automatically.

A Wake-Up Call for MNEs: Accuracy is Now a Strategic Priority

The OECD update should be read as a call to action.

An MNE group should treat CbC reporting as more than a compliance duty. It is a statement to tax authorities worldwide. That means:

• Investing in robust internal processes to ensure data accuracy.

• Validating report structure against the latest XML schema requirements.

• Aligning financial data sources across the organization.

• Conducting internal audits of past reports to identify recurring gaps or misinterpretations.

It also means bringing in advisers and counsel early. The aim is a reporting position that is right on the technical rule and right in context.

Looking Ahead: The Evolving Role of CbC Reporting

Transparency is becoming the global norm rather than a buzzword. CbC reporting will matter more as a result. Future versions may add data fields and tighter validation. They may add greater public disclosure too.

Tax authorities may also build AI-based review systems. Such a system would analyze trends across jurisdictions and across years. In that setting, clean and consistent data is a company’s best defense. It may even set the company apart.

In Conclusion: Get It Right, or Get Ready

Country-by-Country reporting can level the playing field. It can help ensure that tax is paid where value is created. But that promise holds only if the data is accurate, complete, and consistent.

The OECD’s message to MNEs is clear. The age of box-ticking is over. Filing the report is no longer enough. Precision, transparency, and accountability are what count now.

So the next time your team prepares a CbC report, do not only ask whether it is submitted. Ask whether it is correct.

In today’s tax landscape, the real risk is not only non-compliance. It is being caught being sloppy with the truth.