Who Is Eligible for the NDIS? The Access Requirements, Explained

More than 717,000 Australians held an approved NDIS plan by March 2025, and tens of thousands more join each quarter. Behind those numbers sit a great many families who waited far longer than they needed to before applying — usually because nobody could tell them clearly whether they’d qualify.

So here’s the clear version. NDIS eligibility comes down to four tests, and you need to satisfy the first two plus one of the remaining two. That’s the whole structure. Everything else is detail about how each test is assessed.

The four tests

1. Age. You must be under 65 when you apply. (People already in the scheme at 65 can continue; the aged care system takes over for those who become disabled later.)

2. Residence. You need to live in Australia and be an Australian citizen, the holder of a permanent visa, or a protected Special Category Visa holder. New Zealand citizens on a standard Special Category Visa generally don’t qualify unless they hold protected status — a genuinely common and disappointing discovery.

Then either:

3. The disability requirements. You have a permanent impairment that substantially reduces your functional capacity, and you’re likely to need NDIS supports for life.

4. The early intervention requirements. You have an impairment likely to be permanent, and providing support now would reduce your future support needs. This is the pathway most young children take, and it’s also available to adults where early support would change the trajectory — a fact almost nobody knows.

That fourth pathway is worth pausing on. Families frequently assume that if a condition isn’t yet severely disabling, there’s no point applying. Early intervention exists precisely for that situation, and applying earlier rather than later is usually the right move.

What “permanent” and “substantial” actually mean

These two words do most of the work in access decisions, and both are frequently misunderstood.

Permanent doesn’t mean unchanging or untreatable. It means there’s no known, available and appropriate evidence-based treatment likely to remedy the impairment. A condition can fluctuate — significantly — and still be permanent. Multiple sclerosis, epilepsy, bipolar disorder and complex psychosocial disability all fluctuate, and all can meet the permanence test. What matters is that the underlying impairment isn’t going away.

Substantially reduced functional capacity is assessed across six domains. Understanding these is the single most useful thing you can do before applying, because the entire access decision is framed around them:

• Mobility and motor skills — moving around your home and community, transfers, using equipment
• Communication — being understood and understanding others, in any format
• Social interaction — making and keeping relationships, managing social situations, behaviour
• Learning — understanding and remembering information, acquiring new skills
• Self-care — showering, dressing, eating, toileting, health management
• Self-management — organising your life, decisions, problem-solving, finances, appointments

You generally need substantial reduction in at least one of these domains. Not all six. A person whose mobility is fine and whose intellect is unaffected can still absolutely qualify on self-management grounds alone, and many do.

The mistake that sinks the most applications

Applications fail on evidence far more often than on merit. And the most common evidence failure is this: reports that describe a diagnosis instead of a function.

The NDIS is not diagnosis-driven. There is no list of qualifying conditions where having one guarantees access. Two people with the same diagnosis can receive completely different decisions, correctly, because their functional impacts differ.

Which means a report saying “Mr Ahmed has been diagnosed with a moderate acquired brain injury following a motor vehicle accident in 2019” does almost no work. A report saying “Mr Ahmed cannot follow a two-step instruction without written prompts, cannot manage his own medication and has left the stove on unattended on multiple occasions, requiring supervision for all cooking” does all of it.

When you ask a treating professional for evidence, ask them explicitly to describe functional impact across the six domains, not the condition. Most will happily do it. Many will otherwise default to a clinical summary that’s excellent medicine and useless evidence.

Common situations, and how eligibility usually applies

Abstract rules only get you so far. Here are situations we’re asked about regularly.

“My child has just been diagnosed with autism.” Early childhood is where the early intervention pathway does its heaviest work, and children under 9 are supported through a dedicated early childhood approach rather than the standard access process. Applying early matters: the whole logic of early intervention is that support now reduces support needed later.

“My condition fluctuates — some months I’m fine.” Fluctuation doesn’t disqualify you. What matters is whether the underlying impairment is permanent and whether, across the pattern of good and bad periods, your functional capacity is substantially reduced. Describe the range honestly: what a good month looks like, what a bad one looks like, and how often each occurs. Applications that only describe good days get assessed on good days.

“I’ve had a stroke / acquired brain injury recently.” Permanence can be difficult to establish while recovery is still active, and applications made very early are sometimes declined on that basis. That’s not a permanent no. Once the clinical picture stabilises and your treating team can speak to likely permanence, reapply with that evidence.

“I’m 63 and my condition is getting worse.” Apply now. The under-65 rule is assessed at the time of application, and people already in the scheme can remain in it past 65. Waiting until you feel you “really need it” can cost you access entirely.

“I have a psychosocial disability.” This is one of the largest cohorts in the scheme, and also one where applications are most often under-evidenced. The NDIS funds the disability — the lasting functional impact — not the mental illness itself, which remains the health system’s responsibility. Evidence needs to describe what you can’t do and how consistently, not just the diagnosis or treatment history.

“I’m a New Zealand citizen.” This is where the residence test bites hardest. Standard Special Category Visa holders generally don’t meet the residence requirement; protected SCV holders and those who’ve since obtained permanent residency do. It’s worth checking your exact visa status rather than assuming.

Building your access request

1. Get the Access Request Form from the NDIA — by calling 1800 800 110, through a Local Area Coordinator or early childhood partner, or online. You can start with a phone call; you don’t need everything ready first.
2. Gather functional evidence. Reports from treating professionals — GP, specialists, occupational therapist, psychologist, speech pathologist — dated, specific, and addressing the six domains. Existing reports can often be updated rather than redone.
3. Include the history. Length and stability of the condition, treatments tried, outcomes. This is what establishes permanence.
4. Describe a real day. If you do nothing else, do this. A concrete narration of an ordinary day, including what goes wrong and who currently fills the gaps, is more persuasive than any amount of adjectives. (Our guide on describing your support needs covers the technique in detail — it applies to access requests as much as to plan requests.)
5. Submit, then track it. The NDIA generally aims to decide access within 21 days of receiving a complete request, though requests for further information restart the practical clock. Respond to any information request within days, not weeks.

If you’re found ineligible

A decision isn’t the end of the road, and a surprising share of initial refusals are overturned.

Internal review is the first step, and it has a deadline — generally three months from the decision. Most successful reviews succeed for one reason: better functional evidence. If your original application leaned on diagnosis, this is the moment to go back to your treating team and ask for functional descriptions across the six domains.

External review through the Administrative Review Tribunal follows if internal review doesn’t resolve it. Free disability advocacy services can help with both stages, and it’s worth using them — advocates know how these decisions get framed.

And in the meantime, look sideways. State and territory services, community health, foundational supports being rolled out under NDIS reform, carer support through Carer Gateway (1800 422 737), and My Aged Care for those over 65 all exist. Ineligibility for the NDIS is not the same as ineligibility for support, though the system does a poor job of making that clear.

A note on the scheme changing

The NDIS is undergoing the most significant reform since it began. Changes to how supports are defined, how needs are assessed and how budgets are set have been legislated and are rolling out over several years, alongside the development of foundational supports outside the scheme.

Nothing in this guide describes a rule we expect to disappear tomorrow, but the detail does move. Treat any blog — ours included — as orientation rather than authority, and confirm current requirements at ndis.gov.au or by calling 1800 800 110 before you act on them.

Where to next

If you’re already in the scheme and working out what your plan can fund, our guides on plan management options and understanding your plan budgets pick up where this one leaves off.

And if home and living is where you’re heading — supported independent living, specialist housing, or simply working out whether moving out is possible — we’re happy to talk it through. Call 1300 271 824. No obligation, and we’ll tell you honestly where you sit.

Sources: NDIS Act 2013 access requirements; NDIS Quarterly Reports to disability ministers, 2024–25. General information only — confirm current eligibility requirements at ndis.gov.au.