NDIS Invoice Requirements: What Support Workers Must Put on Every Invoice

If you support NDIS participants and invoice for it, the short answer is this: put the participant's name and NDIS number, the support item number for each service, the date each support was delivered, your ABN, and the hours or units at your rate, all clearly on the invoice, and send it to whoever actually pays, which is often a plan manager rather than the participant. Miss any one of those and the invoice usually comes back unpaid rather than paid late.

Independent support workers run into this because NDIS invoicing looks like ordinary invoicing until the first one gets rejected. A plan manager's system is checking your invoice against a participant's plan and a price list, not just reading it. Getting the format right the first time is the difference between being paid in a few days and chasing an unpaid invoice for weeks.

A few terms first. The ATO is the Australian Taxation Office. GST is the goods and services tax, 10% normally added to sales by businesses registered for it, though most NDIS supports are an exception (below). An ABN is an Australian Business Number, the 11-digit identifier every invoice needs. A BAS is a Business Activity Statement, the form GST-registered businesses lodge; it is less relevant here because most NDIS work carries no GST to report.

Who you actually invoice

This trips people up more than any formatting rule. A participant's NDIS plan is managed one of three ways, and it changes where your invoice goes:

Plan management	Who you invoice	How it works
Plan-managed	The participant's plan manager	You send a standard invoice; the plan manager pays you from the participant's funding and reports the claim
Self-managed	The participant directly	The participant pays you like any other client and claims it back themselves
Agency-managed (NDIA-managed)	Nobody, in the invoice sense	Registered providers claim through the NDIA's provider portal rather than sending a private invoice

If you are not sure which applies, ask before you do the work. Sending a plan-managed participant's invoice to them personally, or vice versa, is one of the most common reasons a first invoice sits unpaid.

What every line needs

Beyond the basics any invoice needs (your business name, ABN, invoice number and date), an NDIS invoice needs fields a general tradie invoice does not:

Field	Why the plan manager needs it
Participant's full name and NDIS number	Matches the claim to the correct plan; use the participant's own name, not a parent's or guardian's, even for a child
Support item number	Identifies exactly which funded support you delivered, from the current NDIS support catalogue
Service date for each line	Must fall inside the participant's plan period; future or out-of-plan dates get rejected
Hours or units and your rate	The rate must sit at or under the relevant price cap for a plan-managed or agency-managed participant
GST treatment	Almost always "GST-free", noted on the invoice even though the amount is zero

One invoice, one participant. Even if a single plan manager handles several of your participants, keep each participant on their own invoice; their systems reconcile per participant, and a mixed invoice tends to get bounced back for splitting.

GST on NDIS supports

Most supports delivered under a participant's NDIS plan are GST-free, whether or not you are registered for GST yourself, because they are treated as supports for a person with a disability rather than an ordinary taxable sale. Practically, that means the GST amount on the invoice is zero, but you should still note "GST-free" against the line rather than leaving it blank, so the plan manager's reconciliation does not flag it as a missing GST decision.

This is separate from the general GST registration threshold that applies to your business overall. If you are registered for GST because you also do non-NDIS work, your NDIS lines still come in GST-free; only your other work carries GST. If most or all of your income is NDIS support, plenty of workers never need to register at all. Keep NDIS and non-NDIS work on separate invoices so the difference is obvious in your own records.

Rates and the price guide

The NDIS publishes price caps for plan-managed and agency-managed participants, updated periodically. Your rate for those participants cannot exceed the cap for the relevant support item and time of day (standard weekday, evening, weekend and public holiday rates typically differ for the same support). Self-managed participants are not bound by the same cap and can agree to a different rate with you in writing, but it is worth confirming that in the service agreement before you start, not after the first invoice.

Because the price guide changes, do not rely on a rate you quoted six months ago. Check the current version before invoicing at a new rate, and quote the support item number that matches the version in force on the dates you worked.

Common mistakes

Sending the invoice to the participant when they are plan-managed. It sits with them, unpaid, while the real payer never sees it. Confirm plan management status before the first invoice.

Using an old support item number. The price guide updates periodically; an outdated number or rate is one of the fastest ways to get an invoice bounced.

Leaving the participant's NDIS number off. Without it, the plan manager cannot match the claim to a plan, however clear the rest of the invoice is.

Mixing NDIS and private clients on one invoice. Keep them separate. It is also the cleanest way to see, at a glance, how much of your income is GST-free NDIS work versus taxable private work.

Invoicing before the support was delivered. Dates must sit inside the plan period and cannot be in the future; invoice after the shift, not before it.

Leaving GST blank instead of marking it GST-free. A blank GST field reads as unresolved, not zero, on some plan managers' systems.

Getting the invoice itself right

Once the NDIS-specific fields are covered, the rest is an ordinary invoice: your business name and ABN, a sequential invoice number and date, a clear description of each support with quantity and rate, and a total. The free tax invoice generator handles the standard fields and GST calculation; add the participant's name and NDIS number in the customer details and the support item number in each line description, and note the line as GST-free.

If you want a ready-made layout built specifically for this, the NDIS support worker invoice template shows a full worked example: support item numbers, weekday and weekend rates, provider travel, and the GST-free note, all in the order a plan manager expects to see them. For the general rules every invoice has to meet regardless of who pays it, see how to write a tax invoice in Australia.

Keep your records

Invoices, service agreements and any correspondence about a rejected claim are business records. Keep them for five years, the same as any other invoice, so you can show what you delivered and at what rate if a plan manager or the ATO ever asks.