Poland's Legal System: Civil Law, Not Common Law

Poland is a civil law country, not a common law one. Its rules live in written codes, the Kodeks cywilny (Civil Code) and Kodeks karny (Criminal Code), and no past court decision binds a judge the way precedent does in the United States or the United Kingdom. This guide explains what that single difference changes for anyone from a common law background dealing with Poland: how courts work, how contracts are read, how inheritance lands on you, and why trusts don’t exist here.

Is Poland civil law or common law?

Poland is a civil law (continental) jurisdiction. The law is found in written, enacted codes rather than built up from a chain of past judgments.

That means two things up front. First, the primary source of law is the statute: when a Polish judge decides your case, the starting point is the relevant article of a code, not a library of earlier rulings. Second, there is no binding doctrine of stare decisis (let the decision stand), the principle that a higher court’s past ruling locks in the answer for later cases. A Polish court reasons from the code to your facts.

Almost every surprise a common law reader hits in Poland traces back to this one fact. No jury in most matters, inheritance that vests automatically (debts included), the absence of trusts, contracts that look unfinished. Each of these follows from “the law is in the code, and the judge applies it.”

Civil law vs common law: the core differences (and where Poland sits)

The broad civil-versus-common distinction is the same one you’ll read about anywhere. What matters here is where Poland actually sits on each axis, because that is what the generic explainers leave out.

If you’re weighing “civil law vs common law, which is better” or looking for the pros and cons, the honest answer is that neither is better in the abstract; they are different ways of reaching a decision. Common law adapts case by case and leans on the parties to drive the dispute. Civil law aims for a written rule you can look up in advance, applied by the judge. The similarity people miss is that both systems still use statutes heavily; the real split is whether judge-made decisions are a binding source of law (common law) or not (Poland).

Why precedent doesn’t bind Polish courts

In Poland there is no stare decisis. A Polish judge is not bound by how another court, even a higher one, decided a similar case before.

This is where the picture gets a little more complicated than “precedent simply doesn’t exist.” Resolutions and rulings of the Supreme Court (Sąd Najwyższy) carry real weight and lower courts pay close attention to them, but they are persuasive, not binding in the common law sense. A judge who departs from settled Supreme Court reasoning is on weaker ground, yet is not formally locked in by it the way a US or UK judge is bound by precedent on point.

So if you come from a common law background, drop the instinct to “find the case that controls.” There is soft, practical consistency in how Polish courts read the codes, but the controlling authority is the statute, not an earlier judgment.

No jury, and a judge who applies the statute

In most Polish proceedings there is no jury. You will not get the twelve-person lay jury that anchors a serious US or UK criminal trial.

Instead, certain matters use ławnicy (lay assessors), lay people who sit alongside professional judges rather than deliberating separately as a jury does. The proceeding is judge-led: the judge drives the process and applies the statute to the facts, rather than refereeing a contest run by the two sides. For someone used to the adversarial common law courtroom, this is the culture shock: the judge is closer to the centre of the case.

The other thing that bites is formality. Polish civil procedure runs on deadlines, and they are real: miss the period for filing or responding and you can lose the point on timing alone. If you are suing or being sued in Poland, treat every date as hard.

Inheritance: you inherit the debts (and can choose your home law)

When someone dies under Polish law, the estate vests in the heirs automatically at the moment of death, and that includes the deceased’s debts. Inheritance is not just the house and the savings; the liabilities pass too, which is the part that catches foreign heirs off guard.

For a foreign national this connects to Brussels IV (the EU Succession Regulation), which lets you choose the law of your nationality to govern your succession instead of the law of your country of habitual residence. For a UK or US citizen with assets or family ties in Poland, that choice-of-law option is the lever worth knowing about, because it decides which country’s inheritance rules apply to your estate.

Poland’s inheritance rules were amended by the inheritance-code amendment of 15 November 2023. Treat that as the dated change it is; the full mechanics of who inherits, in what shares, and the rules around zachowek (the reserved-share claim a close relative can bring) are a topic in their own right. See our dedicated inheritance article rather than this overview.

Trusts don’t exist in Poland — meet the fundacja rodzinna

There is essentially no trust in Polish law. The Anglo-American trust, where one party holds and manages assets for the benefit of another, has no native equivalent in the Polish civil code, so the estate-planning structure a common law reader reaches for simply isn’t there.

What Poland introduced instead is the fundacja rodzinna (family foundation), a structure for holding and passing on family wealth that came into force on 22 May 2023. It is the closest structural substitute for what a trust does: a legal vehicle to hold assets, govern how they’re managed, and provide for beneficiaries across generations.

The fundacja rodzinna is its own large subject (how it’s set up, taxed, and used), and we cover it in a separate article. The point to take from here is the bridge: if you were expecting to use a trust in Poland, the family foundation is where that conversation now goes.

Contracts run on code defaults, not 40-page boilerplate

Open a Polish contract and a common law lawyer’s first reaction is often “where’s the rest of it?” The reason is that the Kodeks cywilny supplies default terms. Many of the contingencies a US or UK contract spells out at length, such as what happens on breach, on delay, or on defects, are already set by the code, so the contract doesn’t need to restate them.

In practice that means Polish agreements lean on the code rather than on exhaustive boilerplate. The gaps you see aren’t omissions; they’re the places where the Civil Code (and, for procedure, the Kodeks postępowania cywilnego (Code of Civil Procedure)) already provides the answer. If you want the full default rules, they’re in the code itself; English translations of the Kodeks cywilny exist for exactly this reason.

The system in one table

A quick reference to the terms in this guide:

Some topics here have their own depth: Polish inheritance and zachowek, the fundacja rodzinna, and how Polish contracts work in practice. Follow the dedicated articles linked above.