Tax Liability Derivation: Defend Directors and Shareholders Before Liability Is Declared

Tax liability derivation (derivación de responsabilidad tributaria, Arts. 41–43 of Law 58/2003, LGT) allows the AEAT to collect an entity's unpaid tax debts from company directors, shareholders, and other third parties who are legally responsible for them. Joint liability (Art. 42 LGT) requires active facilitation of an infraction; subsidiary liability (Art. 43 LGT) arises from passive management failure and — critically — only after the company has been declared insolvent or collection proceedings against it have been exhausted. The most recent Supreme Court ruling on the subject — STS 594/2025 — requires the AEAT to demonstrate a genuine causal link (nexo causal) between the director's specific conduct and the company's failure to meet its tax obligations, rejecting automatic liability based solely on the formal holding of a directorship. The 15-day hearing (trámite de audiencia) before the formal liability declaration is issued is the single most critical — and most frequently missed — opportunity to prevent the liability from being declared.

We defend directors, shareholders, and other potentially liable parties at every stage of the derivation procedure. Our analysis covers the liability type, the causal link under STS 594/2025, the prescription period under Art. 67.2 LGT, and the full appeal chain from the hearing through TEAR/TEAC and judicial review.

Why Tax Liability Derivation is the Most Serious Personal Exposure a Director Can Face

A tax liability derivation translates a company’s tax debt — which the director may have had no direct role in creating — into a personal debt of the director. The AEAT can then pursue enforcement against the director’s personal assets: bank accounts, real estate, salary, and receivables. The quantum typically includes the full unpaid tax assessment, interest at the statutory rate, and the full sanction (50–150% of the unpaid amount).

The most common scenario is a company that has been through an AEAT inspection, received a substantial assessment, and failed to pay it. The AEAT then initiates a derivation against the current or former directors, often years after the events in question. By the time the derivation notice arrives, the director may have left the company, may have had no operational role in the decisions that generated the tax liability, and may not even know that the company’s tax audit ended in a large assessment.

The 15-day hearing is the only opportunity before the liability is formally declared. After the declaration, the debt is a personal obligation of the director and enforcement can begin immediately. A well-prepared hearing response — challenging the causal link, demonstrating the director’s limited role, raising prescription, or identifying procedural defects in the underlying company audit — can prevent the declaration entirely or significantly reduce the amount.

Our Defence Process for Tax Liability Derivation Proceedings

We engage immediately on receipt of the derivation notice. The first analysis covers: the liability type (joint vs. subsidiary), the legal basis, the causal link under STS 594/2025, the quantum claimed, and the prescription period under Art. 67.2 LGT. Where the derivation action is time-barred, we raise prescription in the hearing without engaging on the merits.

We prepare the 15-day hearing response with full documentation: evidence of the director’s actual role in the company, evidence that the director lacked knowledge of or influence over the decisions generating the tax liability, evidence of any steps taken to prevent or regularise the tax default, and all legal arguments on causal link, liability type, and procedural defects in the underlying company assessment.

Where the AEAT proceeds with the declaration despite the hearing, we manage the full appeal chain — reclamación económico-administrativa before the TEAR/TEAC (incorporating the latest TEAC doctrine and Supreme Court jurisprudence, including STS 594/2025) and recurso contencioso-administrativo where necessary.

Regulatory Framework: Arts. 41–43 LGT, STS 594/2025 and Art. 67.2 LGT Prescription

Art. 41 LGT establishes the general framework for tax liability. Art. 42 LGT defines joint (solidaria) liability — including active collaborators in infractions and parties who acquire assets to frustrate AEAT collection. Art. 43 LGT defines subsidiary (subsidiaria) liability — including company directors who passively allow tax obligations to go unmet. Art. 67.2 LGT provides the specific prescription period for derivation actions, running from the day the AEAT could first have initiated the action — an important distinction from the underlying tax debt’s prescription period.

STS 594/2025 (Tribunal Supremo, Sala Tercera) rejects automatic Art. 43.1 LGT director liability without a demonstrated causal link. The ruling requires the AEAT to specifically identify the director’s conduct or omission that caused the company’s failure to meet its tax obligations — a higher evidentiary standard than the previous administrative practice of assuming liability from formal directorship alone.

Real Results in Tax Liability Derivation Defence

• Full reversal of derivation declarations where the causal link between the director’s conduct and the tax default could not be established under STS 594/2025.
• Prescription challenges under Art. 67.2 LGT that rendered derivation actions time-barred even though the underlying company debt was within the standard limitation period.
• Successful distinction between formal directorship and actual managerial responsibility, preventing liability declarations against directors with limited operational roles.
• Hearing responses that caused the AEAT to withdraw or significantly reduce proposed liability declarations before formal issuance.
• Full TEAR/TEAC and judicial review management for liability declarations that survived the hearing stage.