Legal Capacity at 18 Disability NZ: PPPR Act, EPA, and Welfare Guardianship

Most parents of disabled young people know the school system ends at 21. Far fewer are prepared for what happens legally at 18. On your child's 18th birthday, you cease to be their legal guardian. Every medical decision, every financial transaction, every government application — they are now legally presumed to belong to your child alone.

If your child has capacity to make and communicate their own decisions, this is appropriate. If they do not, you need legal authority to continue acting in their interests. Waiting until 18 to address this is too late. The documentation takes time, and if you miss the window when your child still has capacity, the alternatives are significantly more complex.

The Legal Shift at 18

Under New Zealand law, parents automatically lose guardianship status when a child turns 18. From that day, the young adult is legally presumed to have full capacity to make their own decisions — medical, financial, and personal.

This presumption of capacity is the default. It is not automatically removed by a disability diagnosis. The law starts from autonomy and restricts it only when a specific legal process has been completed.

For families of young people with significant intellectual disabilities, this creates an immediate practical gap. Banks will not let you access their account. Doctors will discuss treatment with them, not you. Work and Income will correspond with them directly. Without legal authority, you are legally excluded from decisions you have been making on their behalf for 18 years.

Option 1: Enduring Power of Attorney (EPA)

An Enduring Power of Attorney is the simplest legal mechanism — and the one to explore first. An EPA is a legal document in which the young person (the donor) formally grants another person (the attorney) authority to make decisions on their behalf, either immediately or if the donor loses capacity in future.

There are two types:

• Personal care and welfare EPA: Covers medical and personal decisions.
• Property EPA: Covers financial and property decisions.

The critical requirement: the EPA must be signed while the young person still has legal capacity to understand what they are signing. This means understanding that they are delegating authority, to whom, and with what effect.

For a 17-year-old with a mild intellectual disability who can grasp this concept with appropriate support — plain language explanation, visual aids, an advocate present — an EPA can be drafted, witnessed by a lawyer, and activated on their 18th birthday.

If the window closes — if the young person turns 18 without having signed an EPA and clearly lacks the capacity to do so now — you cannot create an EPA retrospectively. The Family Court becomes the only option.

Option 2: Family Court Orders Under the PPPR Act

The Protection of Personal and Property Rights Act 1988 (PPPR Act) provides two types of court-ordered legal authority for adults who lack capacity: Welfare Guardianship and Property Administration.

These are not applications to be made casually. They require medical and psychological evidence, court hearings, and ongoing reporting obligations. They are also temporary — Welfare Guardian orders must be reviewed by the Court at least every three years.

Welfare Guardian

A Welfare Guardian is appointed by the Family Court to make decisions about a person's personal care and welfare — medical treatment, living arrangements, daily care decisions.

Requirements for the applicant:

• Must be over 20 years old
• Must act solely in the best interests of the disabled person
• Cannot be the person's paid caregiver

The Court applies a high threshold. Welfare Guardianship is a restrictive measure, available only where the person wholly lacks capacity in specific decision domains. Partial incapacity does not automatically justify a full Welfare Guardian order — the Court may grant limited authority over specific decisions only.

The application must be supported by evidence: medical reports, a neuropsychologist's assessment, and documentation of the person's inability to understand and communicate decisions. The person subject to the application has the right to be heard and have a lawyer appointed.

Orders are reviewed at least every three years. The guardian must act within the scope of the order, keep records, and report to the Court if required.

Property Administrator

Property and financial decisions are handled separately under the PPPR Act. A Property Administrator can be appointed to manage income and assets for a person who lacks capacity to do so.

For the 2026/2027 period, a Property Administrator can manage assets up to an income threshold of $41,200. Where assets exceed this, a Property Manager must be appointed under a separate, more complex process.

A Property Administrator or Manager must keep accounts, avoid conflicts of interest, and apply to the Court before making significant decisions (such as selling property or making large investments).

What to Prepare Before 18

If the EPA route is viable, begin the process at age 17. A disability lawyer or community law centre can help draft the documents and ensure the witnessing process is valid.

If PPPR Act orders will be needed, start gathering evidence early:

• Updated neuropsychological or psychiatric assessment confirming the capacity assessment
• Current medical reports documenting the disability and its functional impact
• A record of the kinds of decisions where the young person requires substitution (not just support)

Legal costs for PPPR Act applications vary. Community law centres can assist with lower-complexity cases at no charge. Parent to Parent NZ publishes detailed guidance on the PPPR Act process, including what to expect at a Family Court hearing.

Supported Decision-Making: The Alternative Framework

It is worth knowing that the law and the Enabling Good Lives (EGL) framework take different positions on this question.

EGL promotes Supported Decision-Making (SDM) as the preferred approach — creating a "Circle of Support" of trusted people who help the disabled person understand information, weigh options, and communicate their own choices. SDM maximises autonomy and respects the person's right to make decisions with support, rather than having decisions made for them.

The tension is practical: SDM currently has no formal legal standing in New Zealand. Banks, hospitals, and government agencies may still legally require a PPPR order or EPA before acting on a third party's instructions. A beautifully designed Circle of Support does not give you the legal authority to sign a bank form.

The pragmatic approach is to pursue both: establish legal authority through the appropriate mechanism, while also building a Circle of Support that honours the person's voice and preferences within that framework.

For a complete transition planning framework covering legal capacity, NASC assessment, financial entitlements, and the year-by-year checklist from Year 10 to post-school life, the New Zealand Post-School Transition Roadmap brings all of these threads together in one structured guide.

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