The tax optimization of a company subject to corporate tax is not limited to increasing deductible expenses. Since 2024, the tightening of algorithmic targeting by the DGFiP and the lowering of documentary thresholds regarding transfer pricing have changed the equation: any tax strategy must integrate its own defensibility in control. Here, we detail the high-leverage technical axes, taking into account this reinforced context.
Transfer pricing documentation and anti-abuse clause: the foundation before any optimization
Most tax optimization guides treat transfer pricing as a subject for large groups. This is a framing error. Since the fiscal years opened on January 1, 2024, the documentary obligation applies from 150 million euros in turnover or gross assets, down from 400 million previously. The threshold is also calculated at the level of a related entity, which includes medium-sized enterprises that did not consider themselves concerned.
The minimum fine for missing documentation has been raised to 50,000 euros per fiscal year. We recommend preparing the master file and local file even before any intra-group restructuring, not after.
At the same time, the anti-abuse clause of Article 205 A of the CGI now applies to cross-border restructurings benefiting from the favorable regime for mergers. Operations involving third countries are subject to special scrutiny. Setting up a Luxembourg or Irish holding company without real economic substance exposes one to a challenge of the tax deferral. The information published on the site www gestion entreprise info succinctly recalls this regulatory framework.
Tax control and AI targeting: adapting your strategy to algorithmic programming
More than one in two professional tax audits is now programmed by a DGFiP algorithm. About 52% of professional audits in 2025 resulted from AI-assisted programming. This is no longer an experimental device.
The median adjustments resulting from these AI-targeted audits increased from about 34,000 euros in 2024 to nearly 38,000 euros in 2025. Algorithmic targeting improves the quality of selected files, not just their volume. Statistical anomalies on sector margins, sudden variations in results, or atypical intra-group flows trigger alerts.
In practical terms, this means that an aggressive optimization strategy focused on a single fiscal year (exceptional provision, concentrated derogatory depreciation, disproportionate management fees) generates exactly the type of signal that algorithms detect. We observe that companies that smooth their tax levers over several fiscal years undergo significantly fewer programmed audits.
Signals to monitor in your declarations
- A gross margin rate that deviates by more than a few points from the sector average without documented justification (new contract, disaster, heavy investment).
- Management fees or royalty flows to a related entity that exceed the usual sector ratios, without a transfer pricing benchmark.
- A loss carried forward over several consecutive fiscal years while operational activity remains stable, triggering an automatic review of the carry-forward.
Holding companies and the mother-daughter regime: what standard arrangements do not say
The mother-daughter regime remains the most powerful structural lever for SME groups: almost total exemption from dividends paid up, subject to a share of expenses and charges being reintegrated. The creation of a holding company also allows for the deduction of acquisition loan interest, creating a tax leverage effect on LBOs or share buybacks.
The frequent trap is the lack of substance of the holding company. A company without employees, without an identified location, and without real management activity is requalified as an intermediary structure. Recent case law on the anti-abuse clause and the principal purpose test of bilateral tax treaties reinforces this requirement.
To secure the arrangement, the holding company must demonstrate effective management activity: participation in the strategic decisions of subsidiaries, documented management agreements, real services billed at market prices. Without these elements, the benefit of the favorable regime for mergers or the mother-daughter regime may be challenged.
Dutreil Pact and transmission: an underutilized but monitored lever
The Dutreil Pact allows for partial exemption from inheritance tax during the transfer of a business. This device represents an estimated loss of several billion euros per year for the tax authorities. Its use remains perfectly legal, but the conditions for holding shares and exercising a management function are being monitored more strictly.
We recommend formalizing the pact at least two years before the planned transfer and documenting the actual exercise of the management function throughout the duration of the collective commitment.
Tax credit and depreciation: balancing immediate effect and tax smoothing
Tax credits (research, innovation, executive training) offer a direct reduction of corporate tax. The R&D tax credit remains the most significant for companies that incur eligible R&D expenses. However, several tax credits have been replaced by direct aid in recent years, which alters the cash flow timeline.
Derogatory depreciation constitutes a lever for temporal deferral, not a definitive saving. It reduces the taxable income of the current fiscal year but increases that of subsequent years. Its interest lies in financing short-term growth, not in a structural reduction of the tax burden.
The choice between tax credit and depreciation depends on the company’s profit profile. A rapidly growing company with irregular results should prioritize refundable tax credits. A mature company with stable results will optimize more through smoothing depreciation and managing provisions.
A company’s tax burden is sustainably reduced by combining three elements: an appropriate legal structure with real substance, solid defensive documentation against control algorithms, and technical arbitration between the available devices year by year. The rest falls under tax marketing.
