supportd
NDIS explained

How do I ask the NDIA for reasons for a decision?

Updated 19 October 2026 · Checked against official NDIS and government sources

In plain English

The NDIS Act says the NDIA must give you written notice of a reviewable decision and the reasons for it. If the reasons are thin, ask the NDIA in writing to explain. After an internal review, you can formally request a statement of reasons under the Administrative Review Tribunal Act 2024, and the NDIA must respond within 28 days. You can also ask for your NDIA file.

What a statement of reasons is

A statement of reasons is a written document that explains a government decision. Under the Administrative Review Tribunal Act 2024, a proper statement of reasons must:

  • Set out the findings on material questions of fact
  • Refer to the evidence or other material those findings are based on
  • Explain the reasons for the decision

Your right to reasons under the NDIS Act

Section 100 of the NDIS Act says the NDIA must give written notice of a reviewable decision, and of the reasons for it, to each person directly affected. Reviewable decisions include access decisions, approving the supports in your plan, decisions to vary or not vary a plan, refusing a reassessment, and nominee decisions.

In practice the reasons in a decision letter or plan can be brief, for example a line saying a support was not considered reasonable and necessary. If that does not tell you what evidence was missing, ask. Call or write to the NDIA and ask which criteria were not met and what information was considered.

Requesting a formal statement of reasons

Once you have an internal review decision, that decision can go to the Administrative Review Tribunal. Under sections 268 and 269 of the Administrative Review Tribunal Act 2024, a person affected by such a decision can ask the decision maker, in writing, for a statement of reasons.

The decision maker must give it within 28 days of receiving the request. It can refuse if you ask more than 28 days after receiving the decision document, or if you have already been given a statement of reasons. If it refuses or does not respond in time, you can ask the Tribunal to decide whether the reasons must be given, and you can also ask the Tribunal to decide whether a statement is adequate.

Do not let a request for reasons cost you a deadline

Asking for reasons does not stop the clock on your review rights. Keep these limits in mind:

  • Internal review: ask within 3 months of receiving the original decision notice. You can ask for the review and for more reasons at the same time
  • Administrative Review Tribunal: apply within 28 days of receiving the internal review decision. If you are late, ask the Tribunal in writing for more time and explain why

Getting your NDIA file

Reasons explain the decision. Your file shows what the decision maker actually had in front of them, such as planning notes, reports and internal assessments. You can ask the NDIA for copies of your documents, and you have a formal right to request them under the Freedom of Information Act 1982 through the NDIA's freedom of information process.

If your case goes to the Administrative Review Tribunal, the NDIA must also give you and the Tribunal the documents from its file that are relevant to the review.

How to use the reasons in a review

Good reasons show you exactly what to fix. Go through them line by line and note each finding you disagree with and each piece of evidence the NDIA said was missing. Then gather evidence that answers those points, such as an updated therapy report that links a support to your disability and goals.

A free advocate, including one funded through the NDIS Appeals Program, can help you read the reasons and plan your response.

Next steps on Supportd

Looking for NDIS support?

Supportd lists registered providers, unregistered providers and independent support workers across Australia. Free for participants, no commission and no cut of your plan funds.

Get matched free in 48 hoursSearch the directory

Are you an NDIS provider?

List your service on Supportd and reach participants searching for support in your area. Flat monthly pricing, no commission.

List your service

Common questions

Does the NDIA have to explain its decisions?

Yes, for reviewable decisions. Section 100 of the NDIS Act says the NDIA must give written notice of the decision and the reasons for it.

How long does the NDIA have to give a statement of reasons?

For a formal request under the Administrative Review Tribunal Act 2024, 28 days from receiving your written request.

Can I ask for reasons for my internal review decision?

Yes. Ask the NDIA in writing for a statement of reasons, ideally within 28 days of receiving the decision. If it refuses or does not respond within 28 days, you can ask the Tribunal to decide.

How do I get a copy of my NDIS file?

Ask the NDIA for your documents, or make a request under the Freedom of Information Act through the NDIA's freedom of information process. If you appeal to the ART, the NDIA must provide its relevant documents.

Should I wait for reasons before asking for an internal review?

No. The 3 month limit for an internal review keeps running. Ask for the review and request more detailed reasons at the same time.

Sources

This page is general information, not advice about your plan. NDIS rules change, so check the NDIA or your plan manager before making decisions.

Browse all 370 NDIS glossary terms
Search directoryGet matched free