§ 01 — Practice area

Joint custody and shared physical care

Joint parental authority, alternating physical custody, primary-residence arrangements — Swiss Civil Code arts. 296-298a. Maître Andrea von Flüe, Geneva.

Joint parental authority is the rule (CC art. 296 para. 2, in force since 1 July 2014). Alternating physical custody — sharing the child’s living time between both parents — has become a frequent option since the Federal Supreme Court rulings of 2017 (ATF 142 III 612, 142 III 617). It is, however, neither automatic nor suited to every situation.

  • CC arts. 296-307 (RS 210) — parental authority, custody
  • CC arts. 298a-298d — unmarried parents
  • ATF 142 III 612, 142 III 617 — criteria for alternating custody
  • ATF 144 III 481 — alternating custody and relocation
  • CC art. 134 — modification

Terminological distinctions

  • Parental authority (autorité parentale): decision-making power on important questions in the child’s life (school, major medical care, religion, relocation)
  • Custody (garde): the practical organisation of care — where the child lives, who handles daily life
  • Alternating custody (garde alternée/partagée): the child lives alternately with each parent on a balanced calendar
  • Exclusive custody with visitation: the child lives primarily with one parent, the other exercises a visitation right

Federal Supreme Court criteria

ATF 142 III 612 sets out the criteria that guide the determination of alternating custody. Each carries weight:

1. Educational capacity of each parent

The capacity to meet the emotional, intellectual and material needs of the child. Assessed case by case.

2. Geographic proximity of the two homes

A major criterion. Alternating custody works better when the homes are close — typically in the same school catchment, ideally within 30 minutes of transport. Beyond that, transitions become burdensome for the child.

3. Real availability of each parent

Work schedules compatible with effective presence. A parent constantly travelling or on shift work cannot sustain a 50/50 alternating custody.

4. Capacity for cooperation between parents

This is often the blocking criterion. Alternating custody requires near-daily joint decisions — health, school, activities. Acute parental conflict makes alternating custody harmful to the child.

5. Prior stability of the child

Maintenance of the existing setting: school, friends, activities, treating physician. A change of setting harms the child.

6. Wishes of the child

From around age 12, the child’s wishes weigh heavily. Before that, they are taken into account but not determinative. The hearing of the child is conducted by the judge or by a representation curator (CPC art. 299).

Practical arrangements

50/50 calendar

  • Week on, week off: 7 days with mother, 7 days with father, typical handover Sunday evening or Monday morning
  • 2-2-3: 2 days with mother, 2 days with father, 3 days alternating
  • 5-5-2-2: variant allowing full weekends with each parent

Asymmetric calendar (e.g. 60/40, 70/30)

Possible and frequent. Recognised as “shared custody” even without a strict 50/50.

School holidays

Split in half, alternating year-to-year for major holidays (Christmas, Easter, summer), with a precise list of public holidays.

Financial aspects — no automatic symmetry

A 50/50 custody does not mean the absence of maintenance. The calculation integrates:

  • Income of both parents — an income gap generates compensation
  • Specific charges (medical, private schooling, activities)
  • Direct cost of the child with each parent (larger housing, food)
  • Family allowances — in principle attributed to the parent with the higher income, or alternated

The Federal Supreme Court’s unified method (ATF 147 III 265) applies even in alternating custody.

Tax treatment of alternating custody

In Geneva, alternating custody has specific tax implications:

  • Possibility of splitting the child deduction between the two parents
  • Family allowances: only one parent declares them
  • Childcare expenses: deductible by the parent who bears them

A poor tax arbitrage can cost CHF 2’000-5’000 per year. Anticipate with a fiduciary.

When alternating custody is ill-advised

  • Intense parental conflict, communication impossible
  • Homes too far apart (forced school or catchment change)
  • Work schedules making availability illusory
  • Very young children (0-3 years) where splitting disrupts attachment
  • Categorical refusal of the child
  • History of violence or serious parental shortcomings

In such cases, exclusive custody with extended visitation is often preferable. The firm states this honestly — pushing alternating custody at any cost harms the child.

Alternating custody in the Franco-Swiss context

Specifics seen in practice:

  • Cross-border school catchment: possible if a French school is accessible from both sides (rare)
  • Health insurance: must cover the child in both countries
  • Treating physician: a single reference doctor recommended
  • Extracurricular activities: must be accessible from both homes
  • Family allowances: different rules between French CAF and Geneva fund

See binational custody for the full cross-border dimension.

Modification — CC art. 134

Changes in circumstances justifying modification:

  • Relocation
  • Career change of one parent
  • School transition (entry into secondary school or gymnase)
  • Persistent refusal of the child
  • Deterioration of parental cooperation

Timelines

  • Initial determination (marital protection measures or divorce): 4-24 months
  • Modification: 6-12 months

Costs

  • First consultation: CHF 50
  • Alternating custody set in marital protection measures or a divorce: included
  • Standalone alternating-custody agreement (unmarried parents): CHF 1’500-3’500
  • Contested alternating-custody proceedings: CHF 5’000-12’000
  • Modification: CHF 2’500-5’000
  • Legal aid (assistance juridictionnelle): available

Documents to prepare

  • Detailed work schedule of each parent (current and prospective)
  • Distance and travel time between the two homes and the school
  • School calendar (Geneva and, where applicable, French Académie)
  • List of the child’s recurring activities and treating professionals
  • Tax returns of both parents (for the maintenance interaction)
  • For unmarried parents: joint declaration of parental authority

Going further

Maître Andrea von Flüe has handled custody questions in Geneva since 2012. First consultation CHF 50.