Do NDIS support workers need an ABN?

If you invoice a plan manager, the NDIS says the invoice must include a valid Australian Business Number (ABN) unless you are exempt from providing an ABN. The NDIS also lists your ABN, with your business name, among the details an invoice needs.

Not everyone can get one. business.gov.au says: "To get one you need to be running a business or other enterprise." A support worker whose provider pays them wages is not invoicing anyone, so this page is for workers who run their own business. If you are unsure which you are, ask the ATO or a registered tax agent.

For a self-managed participant the NDIS page gives no ABN rule for your invoice, but the participant keeps your invoices and receipts as evidence, and the NDIS record keeping page lists your ABN on invoices. Put it on every invoice.

The ATO says: "If a supplier does not provide its ABN, the payer may need to withhold an amount from the payment for that supply". The rate it gives is 47%. A supplier must quote their ABN by the time the payment is made, and can quote it on an invoice.

A few suppliers are not required to quote an ABN, for example those who are not entitled to one because they are not carrying on an enterprise, or whose activity is a private recreational pursuit or hobby. They can complete a Statement by a supplier form. The ATO says a supplier who is operating a business or is entitled to an ABN cannot use it.

If you have applied for an ABN but not received it, the ATO says you may ask the payer to hold back payment until the ABN has been obtained and quoted. That is a matter for you and the payer to work out.

You can have an ABN and not be registered for GST. The conditions for GST-free supports are in NDIS supports and GST. Do not add GST to an invoice because you have an ABN: that is a separate registration.

From 1 December 2026 an NDIS claim must be made within 90 days of the support being delivered. The limit was two years. The change is in Schedule 2, Part 5 ("Reducing claim times") of the National Disability Insurance Scheme Amendment (Securing the NDIS for Future Generations) Act 2026 (No. 66 of 2026). The NDIS rules may set a shorter period for some claims.

The Act has no separate rule for a support delivered before 1 December 2026. On our reading, a claim made from 1 December must be within 90 days of the support, even for earlier supports, so claim older supports before 1 December. This is general information, not advice: check with the NDIA. Either way, invoice and claim soon after each support, not in a batch weeks later.

In Invio, where the claims tools or the shift log are switched on for your account, a reminder reads "Claim within N days" from 60 days after a support was delivered (amber), turns red from 80 days, and says "Past the 90-day claim window" after 90. A support delivered before 1 December that is already older than that reads "Claim by" with its last day, which is 30 November 2026 at the latest. It shows on the dashboard, on the Bill shifts screen for signed-off shifts that are not on an invoice or a claim yet, and in the notes before you send an invoice with an old line date. The reminders never stop you sending or claiming, and Invio does not submit claims for you.