Ethics and deontology are often used as synonyms in everyday language. However, these two concepts refer to distinct mechanisms: one pertains to personal reflection on what is right, while the other is a body of rules imposed by a profession. Understanding their relationship allows for a better understanding of the obligations that weigh on a professional and the judgment margin that remains.
Ethics, deontology, and morality: comparative table of the three concepts
Before analyzing the differences between ethics and deontology, it is essential to include a third term that often complicates the understanding: morality. These three concepts form a gradient, from the most rigid collective norm to the freest individual reflection.
| Criterion | Morality | Deontology | Ethics |
|---|---|---|---|
| Origin | Social, religious, or cultural norms | Rules established by a professional order or body | Personal reflection on values and principles |
| Nature | Prescriptive: what is permitted or forbidden | Normative: duties towards the public, clients, the profession | Reflective: questioning what is right in a given situation |
| Binding Force | Social pressure, no direct legal sanction | Possible disciplinary sanction (warning, expulsion) | No formal sanction, pertains to the inner self |
| Scope | Universal within a cultural group | Limited to members of a regulated profession | Individual and contextual |
| Concrete Example | Not lying | Respecting professional secrecy (medical code of ethics) | Deciding to reveal information to protect a vulnerable third party |
This gradient, identified in Canadian legal terminology, distinguishes legal norms, deontological rules, and ethical values as three hierarchical levels. A professional can adhere strictly to their code of deontology while facing an ethical dilemma that the code does not resolve.
To delve deeper into the definitions of ethics and deontology, it is necessary to examine how these two registers interact concretely in professional practice.

Etymology and definitions: why ethics and deontology do not mean the same thing
The word ethics derives from the Greek êthos, meaning “habitual way of being”. It refers to questioning the ideal principles one aspires to. Ethics does not command: it questions, weighs, situates an action within a horizon of values.
Deontology, built on the Greek deon (duty) and logos (discourse), literally refers to the discourse on duties. It produces codes, charters, formalized obligations. A code of deontology sets the duties towards the public and the profession, with sanctions in case of violations.
The distinction thus lies in the nature of the relationship to the rule. Deontology says “you must”; ethics asks “what should I do in this specific situation?”. In social work, for example, deontology imposes respect for the dignity of the individuals being supported, while ethical reflection guides the professional when they must arbitrate between two conflicting principles (protection of a minor and respect for a family’s privacy).
Recent deontological codes: when professional rules evolve faster than ethical reflection
Deontological codes are not fixed. Their regular updates illustrate the ongoing tension between formal rules and ethical appreciation.
The example of the new code of deontology for lawyers
The decree of July 12, 2005, on the deontological rules of the legal profession has been repealed and replaced by a new code of deontology for lawyers adopted by decree on June 30, 2023. The National Council of Bar Associations published an interpretative guide in October 2023.
This new framework allows advertising and personalized solicitation under certain conditions, excluding misleading, comparative, or denigrating advertising. However, the use of testimonials or success rates remains subject to “important principles” (professional secrecy, loyalty, independence), meaning it relies on each lawyer’s ethical judgment.
This movement is revealing: deontology is becoming more flexible regarding communication while ethical demands are strengthening. The formal rule recedes where individual judgment can be exercised but tightens the line on fundamental values.
Other affected professions
The same dynamic is observed in other regulated sectors:
- The medical code of deontology is undergoing reform, particularly concerning the use of social media by doctors, referring to the duty of discretion, a notion at the boundary between deontology and personal ethics.
- The code of deontology for architects has been recently revamped, raising questions about the actual protection it offers against contractual practices.
- The International Council of Nurses has published a new code of deontology, incorporating issues related to digital health and teleconsultation.
In each case, the code delineates a perimeter of duties. What exceeds this perimeter, the gray areas, the edge cases, falls under the ethical deliberation of the practitioner.

Applied ethics and deontology: where is the boundary in daily practice
Ethics is both general (it reflects on principles) and particular (it focuses on singular situations). Deontology, on the other hand, operates by categories: a given act is either compliant or not with the code.
This difference in functioning creates productive frictions. A healthcare professional confronted with a vulnerable patient who refuses care adheres to deontology by obtaining free and informed consent. Ethical reflection begins when they believe that this refusal endangers the person and that no written rule tells them how to arbitrate.
The four main principles of clinical ethics (autonomy, beneficence, non-maleficence, justice) then serve as a compass. They do not replace the code of deontology: they come into play where the code stops.
Deontology protects the professional by providing a verifiable framework. Ethics holds them accountable by placing them in front of their own judgment. A competent professional articulates both registers without confusing them: they apply the rules of their code, then mobilize their ethical reflection when the situation exceeds what the rule provides. This articulation, far from being theoretical, structures daily practices in social work, medicine, law, and all regulated professions.



