Swiss Family Law: Familienrecht for Expats and Cross Border Families

Swiss family law starts from three premises that will surprise anyone whose search results have been dominated by German or Austrian content. Divorce is no fault. Joint parental responsibility for children has been the default since 2014, for married, divorced and never married parents alike. And maintenance, both for children and for a former spouse, is calculated on need rather than a fixed percentage of income, because the country's highest court has expressly ruled percentage and table methods out.

Each of those three points reverses an assumption a reader might reasonably carry over from a neighbouring country's law, and getting any one of them wrong leads to a confidently incorrect answer rather than a merely incomplete one. This hub gives the orientation; the three pages linked below go into full depth on each question. None of the three points below is a matter of local custom or a canton by canton variation; each is set by the same federal civil code discussed throughout this cluster.

Information last verified on 21 July 2026. This page provides general legal information about Swiss law and does not constitute legal advice in an individual case.

What a reader from Germany or Austria will get wrong first

The first assumption to drop is that divorce requires blame. Swiss divorce is no fault, and none of its grounds ask a court to determine which spouse caused the marriage to end. Our divorce page below covers the actual grounds and why Austria's parallel fault based route has no Swiss equivalent. Even the vocabulary differs: sources built for a German or Austrian audience sometimes frame divorce around proving the other spouse's conduct, a framing that plays no operative role once a Swiss court is applying Art. 111, 112, 114 or 115 ZGB.

The second assumption to drop is that custody defaults to one parent, typically the mother, unless a father actively wins it. Since 1 July 2014, joint parental responsibility has been the default for every minor child in Switzerland, regardless of whether the parents are married, divorced, or were never married. Our joint custody page below covers exactly how that default works and the one mechanism unmarried parents still have to use. Nothing about which parent moved out, who filed first, or which parent is more available during the working week changes that default on its own.

The third assumption to drop is that maintenance follows a percentage of income the way it does in Germany and Austria. Switzerland's highest court has expressly barred both percentage methods and reference tables, requiring a needs based calculation instead. Our maintenance page below explains that method and why it means no simple formula will give a reliable answer. That is true whether the paying parent is a salaried employee, self employed, or paid partly in bonuses, since the method looks at real, documented figures rather than a category of income.

A quick reference: which provision governs what

The table below maps each central question in this cluster to the provision that actually governs it, so a specific question can be checked against the right article before reading further. It also shows why an assumption imported from German or Austrian material breaks down at exactly that provision, not somewhere vaguer.

Divorce: no fault, and specific grounds rather than a blame based process

Swiss divorce runs on four possible grounds built around agreement and separation time, not fault. Our divorce page covers exactly which of the four applies to a given situation, the two year separation period that matters most, and how occupational pensions are split between spouses when a marriage ends.

A joint request with full agreement tends to move fastest, since the court's job narrows to confirming the agreement was reached freely and that any arrangements for children can be approved. A unilateral petition after two years of separation, or the hardship exception before that, exists specifically for the spouse who cannot get the other to cooperate at all.

Parental responsibility: joint by default, for every kind of parent

Custody, in the sense most readers mean it, is governed in Switzerland by elterliche Sorge, parental responsibility, and it has been jointly held by both parents by default since 1 July 2014. Our joint custody page covers how that default works, the separate mechanism unmarried parents need to use, and the standard a court applies before it will order sole responsibility instead.

That page also covers the one mechanism that matters most for unmarried couples: joint responsibility is not automatic at birth, and requires signing a specific joint declaration once paternity is established. Until that declaration exists, the mother alone holds parental responsibility by law, a detail that surprises many unmarried fathers who assume acknowledging paternity is enough on its own.

Maintenance: needs based, with no percentage table anywhere

Anyone expecting a fixed share of income, the way alimente and unterhalt calculations often work in Germany or Austria, will not find one in Swiss law. Our maintenance page explains the two step method the Bundesgericht actually requires, and why an online calculator cannot substitute for it.

Instead of a formula, our maintenance page walks through the zweistufige Methode mit Überschussverteilung the Bundesgericht made binding nationwide: establish real needs and means first, then allocate what is available in a fixed priority order that puts a minor child's basic needs ahead of everything else. That is a genuinely different starting point from a percentage guideline, and it is worth understanding before assuming any number found elsewhere online applies to a specific Swiss family.

Who actually handles these matters

Two different types of authority appear across this cluster, and knowing which one to expect helps set realistic expectations. Ordinary civil courts handle divorce itself, contested custody disputes, and maintenance disputes that end up litigated rather than agreed. The Kindesschutzbehörde, the child protection authority, handles unmarried parents' joint responsibility declarations, approves maintenance agreements involving a minor child, and can step in on its own initiative if a child's welfare appears at risk regardless of what the parents have arranged.

Both types of authority apply the same substantive rules described on the three spokes below. The difference is procedural, not a difference in what the underlying law requires.

Why this cluster exists

German language search results for Swiss family law questions are dominated by German and Austrian material because those markets are larger, but the underlying law is genuinely different in Switzerland on all three of the central questions above. Someone relying on a German percentage table, an Austrian fault ground, or an assumption that custody defaults to the mother will reach a wrong answer with confidence, not a merely imprecise one.

This is not a criticism of German or Austrian legal content, which is simply correct for its own jurisdiction. It becomes a problem only when a reader assumes shared language means shared law, an assumption Swiss search results do little to correct on their own.

Family law itself is federal. The Zivilgesetzbuch applies the same way in Zürich as it does in Ticino or Genève, so the divorce grounds, the joint custody default, and the maintenance method described in this cluster do not vary by canton. What can vary procedurally is which local court or Kindesschutzbehörde handles a given case, not the substance of the rule it applies.

Who this cluster is for

This cluster is written for anyone navigating Swiss family law regardless of nationality, including cross border commuters, relocating employees, and long term residents raising children or ending a marriage in Switzerland. It assumes an ordinary case governed by the federal Zivilgesetzbuch and does not replace advice from a Swiss family law practitioner for a specific dispute.

It also assumes the marriage or relationship in question is a private one governed by ordinary Swiss civil law, not a case with a significant international element such as a spouse or child living abroad. International cases can raise separate jurisdiction and applicable law questions, and are best reviewed with a practitioner experienced in cross border Swiss family matters.

Where to go from here

If you already know which question you have, the three pages above go into full depth, with worked examples and the exact statutory citations. For the rest of Swiss law beyond family matters, our guide to Swiss law is the place to start. Each of the three pages also includes its own set of frequently asked questions and a full citation list to the underlying federal statutes and case law, so a specific question can usually be checked directly against the primary source.