How to Apply for the NDIS, Step by Step

The application is called an access request

To join the NDIS you make an access request. You can do it by calling the NDIA on 1800 800 110 and asking to make a verbal access request, or by completing an Access Request Form and sending it in with your evidence. Either way, the same three questions get asked, and the same evidence decides the answer.

Most people who are refused are not refused because their disability is not real. They are refused because the paperwork did not show what the NDIA is required to look for. That is a fixable problem, and it is worth getting right the first time, because a fresh application with better evidence is faster than a review.

The three tests, in the order the NDIA applies them

First, age and residence. You need to be under 65 when you apply, and you need to be an Australian citizen, a permanent resident, or the holder of a Protected Special Category Visa, living in Australia. Applying at 64 and 11 months still counts; turning 65 while you are already a participant does not push you out, which we cover in our comparison of the NDIS and My Aged Care.

Second, disability. The NDIA looks for an impairment that is likely to be permanent and that substantially reduces your functional capacity in areas like communication, social interaction, learning, mobility, self-care or self-management. Note what that sentence does not say. It does not say your diagnosis. Two people with the same diagnosis can get different answers, because the test is about function.

Third, and as an alternative path, early intervention. This is for people where support now would reduce how much support is needed later. It is the pathway most often used for children, and the reasoning is different: not what you cannot do today, but what changes if help arrives early.

The evidence is the whole application

Evidence has to come from a treating professional who knows you: a GP, a specialist, a psychiatrist, an occupational therapist, a speech pathologist, a physiotherapist. A letter from a friend or a family member is not evidence for this purpose, however true it is.

What a good report says, and what a weak one leaves out, is the difference between describing a condition and describing a day. Weak: the client has cerebral palsy. Strong: the client requires physical assistance to transfer from bed to wheelchair, cannot prepare a hot meal without supervision because of grip and fatigue, and is unable to use public transport independently due to seizure risk.

Ask each professional for three things in writing. What the impairment is and whether it is likely to be permanent. What you cannot do, or can only do with help or with much more time and effort than most people. What treatment has already been tried, and why the situation is now considered stable rather than still improving. The NDIA publishes what it is looking for in its Operational Guidelines, and handing a professional that link is more useful than asking them to write a letter of support.

How long it takes and what happens next

Once the NDIA has a complete access request, including everything it has asked for, it has 21 days to make a decision. The clock is the part people misread: if the NDIA writes back asking for more information, the timeframe restarts once that information arrives. So an application that is missing a report is not an application waiting in a queue, it is a clock that has not started.

If access is granted, you move to planning, where the conversation shifts from whether you are eligible to what supports are reasonable and necessary. That is a different conversation with different evidence, and preparing for it early is worth the effort.

If access is refused, you can ask for an internal review, and after that the matter can go to the Administrative Review Tribunal. Refusals are not rare and they are not final. The most productive first step is usually to read the reasons closely and work out which of the three tests the decision turned on, because that tells you what evidence is missing.

One thing to know about timing right now

The rules for who gets into the scheme are changing. Under the legislation Parliament passed in August 2026, the boundary between the NDIS and mainstream services will apply to prospective participants from 1 January 2028, with current participants reassessed over a transition period. We set out the dates in what starts when under the new NDIS laws.

That is not a reason to rush a weak application in. A refusal now does not help you later. It is a reason not to sit on a strong one, because the evidence you already have is written against today's test.

If you are applying on behalf of an adult child, or you are the participant and you would rather not do this alone, a Local Area Coordinator can help you lodge, and it costs nothing. Our NDIS help pages explain who the various people are and which of them actually has the power to do the thing you need.

Frequently asked questions

Do I need a diagnosis to apply for the NDIS?

You need evidence from a treating professional about your impairment and its effect on your daily function, and in practice that usually comes with a diagnosis attached. But the test is functional, not diagnostic. A diagnosis on its own, with nothing about what you can and cannot do, is one of the most common reasons a strong case reads as a weak application.

How long does an NDIS access decision take?

The NDIA has 21 days to decide once it holds a complete access request. If it asks for more information, the timeframe restarts when that information is received. That is why an incomplete application can sit for months without anything being wrong at the NDIA's end. Check that everything requested has actually been sent before assuming there is a delay.

What happens if my NDIS application is refused?

You can request an internal review of the decision, and if that does not resolve it, the matter can be taken to the Administrative Review Tribunal. Read the decision letter closely first. It will indicate which requirement was not met, and that tells you whether you need better functional evidence, evidence of permanence, or something else entirely.

Can I apply for the NDIS after I turn 65?

No. You must be under 65 at the time you make your access request. If you are already a participant when you turn 65, you can stay in the scheme, and you get a choice between the NDIS and the aged care system rather than being moved automatically. If you are approaching 65 and not yet a participant, timing matters a great deal.

Does it cost anything to apply?

Applying is free, and a Local Area Coordinator can help you lodge at no cost. What can cost money is the evidence, because some assessments and specialist reports are not fully covered by Medicare. Ask your GP what can be done through existing care arrangements before paying privately for a report you may not need.