The co-parenting agreement: what needs to be in it

In 2019, a British court heard a case that made waves in legal circles. Two women — a biological mother and her partner — had separated when their child was three. The partner had no legal parental status: she had never formally adopted the child, even though she had been the one raising him through his early years while the biological mother worked. There was no co-parenting agreement. The court couldn’t recognise her as a parent — there was no legal basis for it. All it could do was consider questions of contact. After two years of proceedings, she was granted the right to regular visits. Not parenthood — visits. This isn’t a story about the court getting it wrong. It’s a story about how that outcome was sealed long before either of them walked into a courtroom. What a co-parenting agreement actually is A co-parenting agreement (sometimes called a parenting plan) is a document in which two or more adults who plan to raise a child together put their arrangements in writing: who makes which decisions, how the child’s time is divided, how disagreements get resolved, and what happens in the event of illness, relocation, or the death of one parent. These agreements are used by heterosexual and same-sex couples alike, as well as by people planning co-parenting outside of a romantic relationship — a lesbian couple and a known donor friend, for instance, or two couples deciding to raise a child as a four. The legal force of such a document varies by country. In some jurisdictions, a notarised agreement carries direct legal weight. In others, a court treats it as important evidence of the parties’ intentions without being bound by it. Either way, having one fundamentally changes the situation: instead of ‘everyone claims something different’, there’s a signed document with dates and specific terms. An agreement isn’t a sign of distrust. It’s how you make sure you’ve actually agreed on the same thing — while there’s still nothing to fight over. Six sections every agreement should include 1. Roles and legal status The first thing to establish is who is a parent in the legal sense, who is a parent in the practical sense, and how those two things relate. Who is the biological parent (or parents) Who has legal parental status — meaning who is on the birth certificate or has completed an adoption or parental order process If any adults involved lack legal status, what is their intended level of involvement — and how will this be explained to the child What names and titles will be used — especially if there are more than two parental figures in the child’s life This section is often skipped because it feels obvious. It is consistently the one that generates conflict years later. 2. Where the child lives and how time is divided Where the child lives is the central question in any separation. Agreeing on it in advance removes the main subject of any potential dispute. Primary residence: which parent the child lives with as a baseline Contact schedule: how often and under what conditions the child spends time with the second (or third) parent — including weekdays, weekends, and holidays Holidays and significant days: how summer breaks, Christmas, and the child’s own birthday are divided Relocation: what happens if one parent wants to move to another city or country — does it require the other’s consent? That last point is one of the most contentious. Without an explicit agreement, everyone will interpret the situation in their favour. 3. Decision-making Parenting is a constant stream of decisions — from choosing a GP to choosing a school, from dietary choices to religious upbringing. The agreement should clearly distinguish between what requires joint agreement and what can be decided unilaterally. Healthcare: who gives consent for routine and emergency treatment; how major medical decisions are made Education: choice of school, extracurricular activities, examinations Religion and culture: raising the child within a particular tradition, observing religious holidays, rites of passage Finances: who covers which costs, how major expenses are shared (medical, travel, education) Emergencies: who has the authority to make decisions if the other parent can’t be reached A good agreement distinguishes between ‘day-to-day’ decisions (made by whoever the child is with at the time) and ‘strategic’ decisions that require consultation. 4. Financial commitments Money is the second most common source of conflict after residence. The financial section should be as specific as possible. Ongoing costs: who pays for food, clothing, transport, activities — and in what proportion Major expenses: healthcare, education, travel — how decisions are made and who pays Maintenance: if the child primarily lives with one parent, what is the other’s financial contribution — and how is it structured Changed circumstances: what happens if one parent loses their job, becomes ill, or has a significant change in income Inheritance: is the child named as a beneficiary in each parent’s will 5. Medical information and disclosure This section is especially important in donor conception situations — and is often skipped entirely. Disclosure of origins: at what age and in what way will the child be told about the circumstances of their conception Access to donor medical information: if this information exists, how is it stored and who can access it Genetic information: if one of the parents is a carrier of a hereditary condition, how and when will this be shared with the child Medical decisions in case of disagreement: who has the final say in contested situations 6. Dispute resolution and reviewing the agreement Life changes. An agreement that works perfectly for a newborn may no longer fit when the child is seven — or when one parent enters a new relationship. Mediation: agree in advance that disputes go to a mediator first, not straight to court Periodic review: every two to three years (or at significant life changes), the agreement is revisited and updated if needed Amendment procedure: how changes are made — by mutual consent only? With what notice period? Death of a parent: who takes on care if one of two parents dies; what if there were three or four adults involved The most important clauses in any agreement are the ones you’ll never need. And the ones that save everything if you do. Four co-parenting structures — different agreements A co-parenting agreement isn’t a universal template. Its content depends on how the family is structured. Lesbian couple + known donor If the sperm donor is a friend or acquaintance who wants to be involved in the child’s life, the agreement needs to be clear: is he a parent or a donor without parental status? What access does he have? What is he called? What happens if his circumstances change? Leaving these questions unanswered isn’t neutral. It’s a deferred conflict. Male couple + surrogate Here the key question is the surrogate’s role after the birth. Does she want to remain in the child’s life? In what capacity? What do the fathers want? An agreement can’t bind her to any particular relationship with the child — but it records the expectations of all parties. Four parents Two couples deciding to become parents together is one of the fastest-growing co-parenting configurations. The agreement is especially critical here: four adults with four views on parenting, and potentially four separate relationship situations that may shift over time. The minimum for this structure: who holds legal parenthood (usually two of the four — more isn’t possible in most countries), how decisions are made when there’s disagreement, and what happens if one couple separates. One parent + partner without legal status If the second adult in a child’s life isn’t a legal parent, an agreement is particularly important. It establishes their role, their level of involvement, and their rights in an emergency. Their legal standing will still be limited — but the document creates transparency and reduces the risk of conflict. Practical questions Do you need a lawyer? For notarisation — yes. For drafting the first version — not necessarily, but it helps. A family lawyer who specialises in this area will know which clauses courts in your country take seriously and which they don’t. They’ll also flag common traps that aren’t obvious to non-lawyers. At minimum: a legal consultation before signing, even if you’ve drafted the document yourself. Language and format If you both live in the same country — in that country’s language, ideally notarised. If the situation spans borders (one parent in Germany, one in France) — you may need two versions with certified translations. More complex, but more robust. When to do it Ideally — before conception. Before choosing a donor, before signing any surrogacy agreement, before any medical procedures. At that stage there’s no child yet, no exhaustion, no accumulated grievances — just plans and intentions. That’s the easiest time to negotiate in good faith. If the agreement comes later — better late than never. But be prepared for some questions to already carry weight by the time you sit down. One real finding A 2021 Australian study published in the Journal of Family Studies found that couples with a written co-parenting agreement were 3.4 times less likely to go to court following a relationship breakdown than those without one. The agreements themselves didn’t always carry direct legal force — but their existence changed the nature of the negotiation. A document doesn’t create obligations. It creates a shared language. And sometimes that’s enough. This article is for educational purposes only and does not constitute legal advice. Co-parenting law varies by country — consult a family lawyer in your jurisdiction before drafting any agreement.