Fundamentals

Formal and Informal Institutions: Differences and Examples

By Daniel Sardá · Published on

6 min read1,157 words

In this article · 12 sections

Official rules and social norms coexist in nearly every sphere of life. Understanding their relationship helps us assess their effectiveness, legitimacy, and effects on freedom.

Imagine a contract between two people. The document sets deadlines, obligations, and ways to resolve disputes. Yet the relationship also relies on practices that may not appear in any clause: replying promptly, protecting one's reputation, or allowing reasonable leeway for a minor delay. Different kinds of rules operate within the same agreement.

That coexistence helps explain formal and informal institutions. Both organize expectations and incentives, though they work through different channels. The distinction does not separate good from bad, or legal from illegal; it helps us see more clearly the rules that structure social life.

An institution is not the same as an organization

In everyday language, “institution” often refers to a university, court, or business. For institutional analysis, however, it is useful to distinguish two ideas:

A university, for example, is an organization. Its admissions rules, assessment procedures, and conventions governing relations between faculty and students are part of its institutional environment.

Economist Douglass North described institutions as humanly devised constraints that structure interaction. The metaphor of the “rules of the game” encompasses laws and property rights as well as conventions and codes of conduct. Institutions do not determine every action: they make some forms of conduct more predictable, costly, or advantageous than others.

Key idea: The organization brings actors together; the institution guides their conduct.

What are formal institutions?

Formal institutions are rules established and enforced through official channels. They are commonly codified and accompanied by defined procedures for interpretation and enforcement.

They include a constitution, statute, regulation, or an association's bylaws. Contractual rules are also formal when expressed through recognized mechanisms and enforceable through the appropriate channels.

What matters is not writing alone. A formal rule belongs to a system that identifies who may create, amend, interpret, and sanction violations of it.

What are informal institutions?

Informal institutions are socially shared rules, generally unwritten, that are communicated and enforced outside official channels. They work because people expect certain behavior and because departing from it can bring disapproval, loss of trust, exclusion, or reputational harm.

Taking turns, a professional practice passed among colleagues, or an expectation of reciprocity can function as informal institutions. Not every repeated behavior qualifies: there must be a shared expectation about how one ought to act.

Nor should informal be confused with illegal. An unwritten norm may support a lawful activity, be irrelevant to the law, or conflict with it. The category describes how a rule operates, not its legal status or moral worth.

Differences between formal and informal institutions

The boundary is not perfect: some practices are eventually codified, and some formal rules depend on professional habits. A convention may be followed rigorously while a law remains ineffective. Formality, effectiveness, and legitimacy are distinct dimensions.

Key idea: A written rule is not effective merely because it exists, and an informal rule is not legitimate merely because people follow it.

How formal and informal rules interact

The two kinds of institutions rarely operate in isolation. Drawing on Gretchen Helmke and Steven Levitsky's typology, their relationship can be explained in four ways. This is a useful lens, not a universal law.

They can complement each other

An informal rule can help another, formal rule to be observed. In a contract, reputation can reinforce the agreed obligations: legal sanction and trust point in the same direction.

They can substitute for each other

When official mechanisms are weak or do not cover a situation, an informal practice can stand in for them. Two parties might turn to a respected mediator. This can facilitate cooperation, but it provides fewer safeguards if it depends on personal relationships or excludes participants.

They can alter the effects of a formal rule

An internal practice can adapt a procedure without openly defying it. A team might change the sequence of an approval process to reduce delays while the regulation itself remains unchanged. The result may be more flexible, but less transparent.

They can compete

A social expectation may demand the opposite of what an official rule requires. If a regulation requires suppliers to be selected by impersonal criteria, but a group rewards favoring acquaintances, the two institutions compete. Knowing the formal rule is no longer enough to anticipate behavior.

This interaction explains why changing a law does not automatically transform practices, and why a social norm may lose force when incentives or expectations change.

Institutions, coordination, and freedom

Institutions structure incentives and reduce some uncertainty: they allow people to form expectations about the actions of others. Rules on property, contracts, and liability can facilitate voluntary cooperation when they are intelligible and reliably applied. General laws, moreover, can limit the discretion of those who exercise power.

But predictability is not enough. A social norm may coordinate conduct and at the same time unfairly exclude people. A law may be clear and stable yet arbitrarily restrict freedom. A valuable rule may fail if no one expects it to be followed.

It is therefore useful to assess at least three questions separately:

  1. What rule exists, and through what channel does it operate? This identifies whether it is formal, informal, or a combination of both.
  2. How does it actually influence conduct? This makes it possible to examine its effectiveness and effects.
  3. Is it legitimate and just? This requires examining its content, how it was established, and whether it respects rights and limits on power.
Key idea: Describing an institution explains how a rule works; judging it requires further arguments about justice, freedom, and responsibility.

A distinction for seeing rules more clearly

The difference between formal and informal institutions does not require choosing between laws and customs. Both coexist and may support, substitute for, adapt to, or conflict with each other.

Analysis improves when we stop calling every organization an “institution,” avoid equating the informal with the illegal, and distinguish a rule's existence from its effectiveness and legitimacy. The useful question is not only whether a rule is written down. It also matters who sustains it, how it is enforced, what expectations it creates, and whether it protects free cooperation or leaves room for arbitrariness.

Sources consulted

About the author

Daniel Sardá is an SEO Specialist, a university-level technician in Foreign Trade from Universidad Simón Bolívar, and editor of Libertatis Venezuela. He writes on liberalism, political economy, institutions, propaganda and individual liberty from an independent, non-partisan perspective.

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