In recent years, French tax audits have evolved from administrative reviews into high-stakes investigations. The French tax administration (DGFiP) is now among the most technologically advanced in Europe, relying heavily on artificial intelligence (AI) and datamining to detect anomalies. At the same time, the legal framework has changed dramatically: the abolition of the so-called “Bercy lock” means that significant tax fraud cases are automatically referred to the criminal courts.

For businesses and individuals operating in France, this dual shift — technological and judicial — has made tax audits a true strategic risk.

AI and datamining at the core of tax audits

The DGFiP now relies on its digital platform “GALAXIE”, which automatically cross-references tax filings, accounting data, bank records, and international information exchanges. Algorithms generate risk scores and identify patterns inconsistent with declared income.

Common triggers for audits include:

• Discrepancies between turnover and banking flows,

• Significant intercompany transactions with low-tax jurisdictions,

• High-value assets or lifestyle indicators inconsistent with declared income.

In 2024, more than half of tax audits in France were initiated based on datamining results, not random selection.

Beyond data : international transparency

France also benefits from automatic information exchange frameworks:

• OECD CRS (Common Reporting Standard),

• EU DAC6 and DAC8,

• FATCA for US-linked taxpayers.

These instruments allow French authorities to detect undeclared foreign accounts, shell structures, or mismatches between French and foreign filings. The age of opacity is over: cross-border investors and multinational groups must expect full transparency.

The end of the “Bercy lock” : automatic criminal referrals

Until 2018, French tax authorities had exclusive discretion to refer fraud cases to criminal prosecution — a system known as the “verrou de Bercy” (Bercy lock). This lock has now been abolished.

Since the 2018 anti-fraud law, any tax reassessment exceeding:

• €100,000 in evaded taxes, or

• €50,000 in cases of aggravating circumstances (forged documents, organized concealment),

must be automatically transmitted to the public prosecutor.

This means that a significant reassessment is no longer just a financial issue: it may also trigger criminal proceedings, with risks of fines, asset seizures, and even prison sentences for company directors.

When tax audits turn criminal

Once transmitted, the case remains active on two tracks:

• On the fiscal side, the taxpayer must still respond to reassessments and may file claims or seek suspension of payment.

• On the criminal side, prosecutors may launch investigations, order searches, and hold directors personally accountable.

French courts have confirmed that fiscal and criminal penalties can be combined: the same fraud may result in both tax reassessments and criminal convictions.

A growing trend

The numbers speak for themselves: more than 2,000 cases were referred to prosecutors in 2024, a record high. This reflects a structural trend: tax audits in France are increasingly intertwined with criminal enforcement.

For foreign groups and high-net-worth individuals, this means that tax risk management must now include not only accounting and legal strategies, but also criminal defense preparedness.

Conclusion

Tax audits in France are no longer a mere administrative formality. They are increasingly driven by AI-powered risk detection and often lead to criminal proceedings when thresholds are met.

For companies and individuals, the lesson is clear: anticipate scrutiny, ensure consistency in filings, and prepare for the possibility that a tax issue may escalate into a criminal matter.

At Qualifisc, we provide integrated defense strategies — combining tax and criminal expertise — to protect our clients from the growing risks of French tax audits.