What an internal review is
If the NDIA makes a decision that affects you and you think it is wrong, you can ask it to look at the decision again. This is an internal review. It is also called a section 100 review, after the section of the NDIS Act that creates it, or a review of a reviewable decision.
The law says the person who made the original decision cannot do the review, and neither can anyone else who was involved in it. It is a full fresh look, and you can add new evidence.
Decisions you can ask to have reviewed
Only decisions listed in section 99 of the NDIS Act are reviewable. Your decision letter should say whether yours is. Common ones include:
- Being found not eligible for the NDIS
- The supports in your plan, including the amount and type of funding
- A decision not to vary your plan or not to do a reassessment
- A decision to revoke your participant status or suspend your plan
- Decisions about nominees and child representatives
- Whether you qualify for the 24 hour support plan variation, and whether it is approved
How to ask
You must ask within 3 months of receiving the written notice of the decision. The request can be written or spoken. You can:
- Fill in the NDIA's request for a review of a decision form
- Email enquiries@ndis.gov.au with your request and any evidence
- Call the NDIA on 1800 800 110
- Visit an NDIS or partner office
- Write to the NDIA's Chief Executive Officer at GPO Box 700, Canberra ACT 2601
What to include
Be specific. Say which decision you want reviewed, what decision you expected, and why you think the NDIA should decide differently. Point to information you have already given that you want reconsidered.
New evidence is often what changes the outcome. A recent functional capacity assessment, therapy reports, or a letter from your GP or specialist that links your disability to the support you asked for can make a real difference. If you are still waiting on a report, ask for the review within the 3 months anyway and send the report when it arrives.
How long it takes
The NDIA aims to finish internal reviews within 60 days of receiving your request. The NDIS Act requires a decision within 90 days, unless NDIS rules set a different period. If the NDIA needs more time, it should contact you to explain why.
While the review is under way, the original decision stays in effect. If your plan is changed or replaced before the review finishes, your review request is taken to cover the new plan's supports too, so you do not need to start again.
What the outcome can be
The reviewer can confirm the decision, change it, or set it aside and make a new one. You get the outcome in writing with reasons.
If you still disagree, you can apply to the Administrative Review Tribunal within 28 days of receiving the internal review decision. If the NDIA has not finished your internal review within 90 days, the Tribunal may be able to review the decision without waiting. Free advocates funded through the NDIS Appeals program can help at both stages.
Internal reviews and the 2026 changes
Some things cannot be reviewed. The October 2026 funding reset, which reduces social, economic and community participation budgets by 50% and improved daily living skills budgets by 10% when a plan is created, reassessed or renewed, is made by support determination and is not a reviewable decision.
You can still ask for a plan variation or an unscheduled reassessment if your needs or circumstances have changed in a significant and ongoing way. Since 27 August 2026, if the NDIA has not decided an unscheduled reassessment request within 90 days it is treated as refused, and you can ask for an internal review of that refusal.