The in concreto assessment and the in abstracto assessment are not two interchangeable options. They reflect two judicial reasoning logics, the choice of which determines the outcome of a dispute. The judge evaluating a civil fault, a defect in consent, or a contractual breach does not use the same reference framework depending on whether they reason from the theoretical model of the good father of the family or from the personal situation of the litigant.
Reference model in civil liability: in abstracto assessment versus individual reality
The in abstracto assessment is based on comparing the disputed behavior with that of a standardized reference model. In terms of civil fault, this model remains the reasonably prudent and diligent person placed in the same external circumstances. The judge does not ask what the defendant could personally have done, but what a normally competent person would have done.
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This standardized approach has a technical advantage: it ensures equal treatment. Two defendants placed in the same objective situation are evaluated according to the same standard, regardless of their experience, age, or intellectual abilities.
The in concreto assessment reverses the logic. The judge incorporates the personal characteristics of the litigant (age, health status, level of competence, vulnerability) to measure whether the behavior adopted was faulty in light of their actual situation. A ruling from the Court of Appeal of Nîmes illustrates this mechanism: the compensation for the victim is calculated based on the actual loss of income, taking into account the concrete professional situation, rather than an average theoretical income.
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To delve deeper into the differences between in concreto and in abstracto, we observe that the main difficulty lies in the articulation of the two methods within the same litigation.
Contractual fault and vague standards: when the judge combines the two methods
The doctrine readily opposes the two approaches. Judicial practice constantly mixes them. In matters of contractual liability, the judge generally begins with an in abstracto assessment of the unfulfilled obligation, then adjusts their in concreto analysis to evaluate the damage suffered.
This dual movement is clearly evident in the litigation concerning obligations of means. To determine whether a doctor has committed a fault, the Court of Cassation first compares their behavior to that of a normally diligent practitioner (in abstracto). If the fault is established, the assessment of the damage shifts to an in concreto logic: the patient’s previous state, their personal loss of chance, their professional background.
The so-called “vague” legal standards (force majeure, hidden defect, significant imbalance, legitimate belief) all operate on this dual framework. The standard sets the normative threshold in abstracto, then the judge applies it to the specific circumstances of the case.
Examples of standards utilizing both assessments
- Force majeure requires an unpredictable and irresistible event, assessed in abstracto against what a reasonable debtor could have anticipated, then in concreto according to the actual means available to the concerned debtor.
- Hidden defect implies a defect that the buyer could not detect: the “undetectable” nature is assessed in abstracto (normally attentive buyer), but the professional or lay quality of the purchaser reintroduces an in concreto dimension.
- Significant imbalance in contract law involves an objective assessment of the content of the clauses (in abstracto), complemented by an examination of the negotiation context between the parties (in concreto).
Criminal law: a more advanced in concreto assessment than civil law
In criminal law, the trend towards individualizing the penalty pushes the in concreto reasoning much further than in civil law. The criminal judge evaluates guilt in light of the person being prosecuted, not from an abstract model of a citizen.
The assessment of negligence in criminal matters illustrates this particularity. Since the law of July 10, 2000, the unintentional criminal fault of individuals is assessed in concreto: the judge takes into account the skills, power, and means available to the perpetrator. This evolution has created a notable gap with civil law, where fault remains predominantly assessed in abstracto.
The quantum of the penalty also follows an in concreto logic. The criminal record, family situation, professional integration, efforts at restitution: all these personal elements modulate the sanction imposed.
Recent applications in taxation and insurance: the in abstracto / in concreto framework formalized
The in abstracto / in concreto couple goes beyond classic judicial litigation. Two recent fields show its regulatory formalization.
In wealth taxation, the qualification of animating holding in the sense of the IFI has shifted towards an in concreto analysis of the actual role of the company. The tax administration no longer merely verifies the statutory corporate purpose (in abstracto approach): it requires proof of effective management (human resources, operational decisions, participation in the strategy of subsidiaries).
In borrower insurance, the equivalence of guarantees framework regulated by the CCSF expressly distinguishes two categories of criteria:
- Abstract criteria, concerning the normative content of the contract guarantees (death coverage, disability, incapacity).
- Concrete criteria, focused on the personal situation of the borrower (professional activity, travel, status).
- These criteria constitute the only valid reasons for refusing a substitution of insurance within the framework of delegation.
This dual framework, which came into effect on May 1, 2015, and was supplemented on October 1, 2015, shows that the distinction between in abstracto and in concreto is no longer confined to legal theory. It now structures concrete regulatory provisions, with direct consequences on the rights of insured individuals and taxpayers.
The choice between in abstracto and in concreto assessment does not stem from a doctrinal preference. It reflects a permanent tension between legal certainty and individualized justice, which each branch of law resolves differently depending on the nature of the obligation, the status of the parties, and the objective of the applied norm.