What happens to NDIS support when a child turns 18?

Legally, an adult participant becomes their own decision-maker unless a guardianship or other formal arrangement is in place. Some families set up supported decision-making arrangements, or in some cases a formal guardianship order, well before the birthday if the participant needs ongoing support to make decisions. This is a legal process separate from the NDIS itself, and worth discussing early with a solicitor or advocacy service rather than leaving until the last minute.

It's worth noting that supported decision-making — where a trusted person helps an adult participant understand and communicate their own choices — is different from guardianship, where someone else is legally authorised to make decisions on the participant's behalf. Many families find supported decision-making preserves more of the participant's autonomy, and it's worth exploring this option before assuming a more formal guardianship arrangement is necessary.

Around this transition, plans are often reviewed to reflect adult life stages — for example, moving from school-focused capacity building to goals around work, further education, independent living skills or community participation.

This is a good time to have an honest conversation with the participant themselves about what they actually want, rather than assuming the previous plan's goals should simply continue unchanged. Some young adults want to move toward greater independence quickly; others need more time, and that's a completely valid starting point too.

Families sometimes assume funding automatically drops once formal schooling ends, since some supports were tied to school-year routines. This isn't an automatic rule — but it is worth checking how any school-linked supports are framed in the current plan, since goals tied specifically to a school setting may need to be reworded for an adult context at review.

It's also common to assume Medicare and other adult systems automatically take over from NDIS supports. NDIS and Medicare cover different things and generally continue alongside each other into adulthood; check with a GP or the NDIA if a specific support seems to sit between the two systems.

Another common misconception is that reaching 18 means losing access to family-oriented supports altogether. In practice, family involvement often continues where it's genuinely helpful — the shift is about who has the final say, not about cutting family out of the process entirely.

If your family is approaching this transition and wants to talk through what day-to-day support might look like for an adult participant in Western Sydney — daily living, community participation, transport or personal care — Valencea can have that conversation. Call 0494 733 201, Monday to Friday, 9:00am–5:00pm, or request a free Meet and Greet before committing to anything. We can also talk through how support might gradually shift to build more independence over time, if that's a goal worth working toward.