How to invoice NDIS participants: a step-by-step guide

Most support workers starting out as sole traders have never had to write a professional invoice before. Working within the NDIS adds a layer on top of that — specific line item codes, support catalogue rates, and three different funding paths that each work a little differently. This guide walks through what you need to know to invoice accurately and be paid on time, whether you're billing a plan manager, a self-managed participant, or working through the NDIA's own portal.

What you need before you can invoice

An ABN. You cannot legally issue a tax invoice in Australia without an Australian Business Number. NDIS plan managers will not process payment without one. If you don't yet have an ABN, you can apply at abr.gov.au — it's free and usually issued straight away.

The NDIS Pricing Arrangements and Price Limits. This is the NDIA's published list of support items, each with a code and a maximum price. Your invoices need to reference the correct support item code, and you cannot charge above the published limit. The pricing arrangements are reviewed regularly — check the current version at ndis.gov.au/providers/pricing-arrangements each financial year, and again whenever an interim update is released.

Your participant's NDIS number. This is a nine-digit number on the participant's NDIS plan. It identifies them to the NDIA and to plan managers. You'll need it on every invoice you send.

An understanding of who is paying. There are three funding management types in the NDIS, and they determine who receives your invoice and how payment is processed.

The three invoicing paths

Plan-managed participants

A plan manager is a financial intermediary the participant has engaged. Your invoice goes to the plan manager, not to the participant directly.

What a plan manager needs on your invoice: your full name, ABN, the participant's name and NDIS number, the support item code, the date of each shift, the number of hours, the hourly rate, and a total. Most plan managers accept standard invoice formats and pay valid invoices reasonably quickly — typically within a week or two, though terms vary between managers, so it's worth confirming when you start working together.

If a plan manager queries a line item — usually because the support code doesn't match the participant's plan — they'll contact you to clarify. Keep your shift records so you can show what support was delivered and when.

Self-managed participants

Self-managed participants control their own NDIS funds directly. You invoice the participant (or their nominee), they pay you from their NDIS funds, and they reconcile their spending with the NDIA themselves.

The invoice format is the same as for plan-managed participants. Payment timelines vary — some self-managed participants pay promptly, others take longer. It's worth agreeing on a payment schedule when you start working with someone.

NDIA-managed participants

NDIA-managed participants (sometimes called "agency-managed") have their funds managed directly by the NDIA. To be paid, supports are claimed through the NDIA's myplace provider portal.

This is the most administratively involved path. Access to the myplace provider portal goes through a PRODA account (Provider Digital Access) and depends on your provider registration status with the NDIA. Registration requirements have tightened in recent years, so check the current requirements at ndis.gov.au before you assume a particular path is open to you. Timeline can prepare the line item detail you'd need for portal entry, but the claim itself is submitted in the myplace portal.

How to structure an NDIS invoice

A clear NDIS invoice contains these fields:

Your details: Your full legal name (as registered with the ATO), business name if you trade under one, ABN, and a contact email or phone number.

Participant details: The participant's full name, NDIS number, and the name and contact of the plan manager if applicable.

Invoice number: Any unique reference number for your own records.

Invoice date and due date.

Line items: For each shift or service, include the support item code, a description of the support delivered, the date, the number of hours, the hourly rate, and the subtotal for that line.

GST notation: NDIS disability support services are GST-free. The invoice should show the GST amount as nil (or explicitly state "GST-free" or "$0.00 GST"). There's more on this below.

Total amount payable.

A straightforward example might look like this. The code and rate below are illustrative only — always check the current NDIS Pricing Arrangements for the support item and price limit that apply to the work you're doing:

Line 1
Support item:  01_011_0107_1_1  (Assistance with Daily Life — illustrative code)
Date:          12 April 2026
Hours:         3.0
Rate:          $67.56/hr  (illustrative — check the current price limit)
Subtotal:      $202.68
GST:           $0.00 (GST-free)

Invoice total:  $202.68
Payment due:    30 April 2026

Mistakes worth avoiding

Missing ABN. Without an ABN on the invoice, plan managers cannot legally pay you, and the invoice goes nowhere.

Wrong NDIS number. A transposed digit means the invoice references the wrong participant, and it'll be queried or rejected. Double-check it against the participant's plan.

Incorrect support item code. Each support item has a specific code. Using the wrong one — say, a community participation code for a daily activities shift — means the line item doesn't match what the participant's plan covers.

No GST notation. Even if you're not registered for GST, the invoice should make the GST position clear. Leaving it blank creates ambiguity for plan managers.

Charging above the price limit. The pricing arrangements set maximum prices. You can charge less, but not more. Invoicing above the limit usually means the plan manager pays only up to it.

Invoicing for items the participant's plan doesn't cover. If a plan doesn't fund a particular support type, the plan manager won't pay for it, regardless of whether the support was delivered. Check which support categories are funded before starting new types of support.

Late invoicing. Plan managers and self-managed participants may have spending cut-off dates tied to NDIS plan reviews. Invoice promptly — ideally within a couple of weeks of each shift.

GST on NDIS invoices

NDIS disability support services fall under Division 38-B of the A New Tax System (Goods and Services Tax) Act 1999, which makes them GST-free. In practice that means:

• You don't add GST to support service invoices
• The GST amount on your invoice should be shown as nil
• If you are GST-registered, input tax credits on expenses that relate exclusively to GST-free NDIS support services are generally not claimable. Speak with a tax agent if you have mixed supplies (e.g. some taxable income alongside the GST-free work).

Most independent NDIS support workers earn below the $75,000 annual turnover threshold that requires GST registration. If you're approaching that threshold, the NDIS tax deductions guide covers what registration means in practice.

When an invoice is queried or rejected

Even when you do everything right, an invoice occasionally comes back with a question. Knowing how to respond quickly — without friction or stress — is part of running a smooth sole trader practice.

What plan managers commonly query. The most frequent issues are: a support item code that doesn't match what's in the participant's plan, a GST line that looks inconsistent, missing or transposed participant details, and rate discrepancies against the current NDIS Pricing Arrangements. Less often, a plan manager may ask for evidence that a shift took place before releasing payment.

How to respond. Acknowledge the query promptly — a quick reply that shows you're across it builds confidence. Attach whatever evidence resolves the question: the relevant section of the service agreement, your shift log or app export, the participant's NDIS plan extract (if you have it and the participant consents to sharing), or a corrected invoice with the right code. Most queries are administrative, not adversarial — treat them that way.

Realistic re-submission timeframes. Once you've provided the right information, most plan managers will re-process the invoice within a few business days. Avoid letting a queried invoice sit — plan managers have processing cycles, and a slow response from you can push payment out by weeks, not days.

When there's a genuine dispute. Occasionally an invoice is refused on grounds that feel incorrect — a plan manager insisting a support type isn't funded when you believe it is, or a rate dispute. In those cases, separate the admin from the care. The working relationship with the participant is not the same as the billing relationship with the plan manager. If you believe the invoice is correct, say so calmly in writing, cite the Pricing Arrangements reference, and ask the plan manager to point to the specific plan restriction they're relying on. If it remains unresolved, the participant or their support coordinator can usually help clarify what the plan covers. Keep records of the correspondence throughout.

Use Timeline's invoice history. Every invoice Timeline generates is saved with its line items, dates and status. If a query comes in three weeks after you sent it, the record is there — you don't need to reconstruct anything from memory.

How long payment typically takes, by funding type

Payment timelines vary between funding types. These are typical ranges, not guarantees — individual plan managers, participants and their own circumstances can move these in either direction.

Plan-managed (typical: 5–14 business days from a valid invoice). Most plan managers process valid invoices within one to two weeks. Delays tend to happen at the start of a new service agreement (while the plan manager confirms the arrangement), at NDIS plan review time (when funds are being restated), or when an invoice has a query that needs resolution before payment is released. If you're starting with a new plan manager, ask them upfront about their processing cycle and the best way to submit invoices.

Self-managed (variable: days to several weeks). Self-managed participants pay you directly from their own NDIS funds. Some are very prompt; others treat it more casually. The best thing you can do is agree in writing — in your service agreement — on a payment schedule and a due date. That gives both of you something clear to refer to, and makes a follow-up conversation easier if payment runs late.

NDIA-managed / agency-managed (allow a fortnight or more). When supports are claimed through the NDIA's myplace provider portal, payment goes through PRODA reconciliation on the NDIA's side. Processing times can be less predictable than plan-managed, particularly if there are portal errors, claim mismatches, or high-volume periods. Build this into your cash flow expectations and don't rely on NDIA-managed payments arriving inside a week.

Regardless of funding type, invoicing promptly after each shift is the single most effective thing you can do to keep your payment timeline short.

Keeping records

NDIS Practice Standards require service records to be retained for seven years from the date of service. The ATO requires tax records — invoices, receipts, bank statements — for five years from the date you lodge the relevant return. Keeping everything for seven years from date of service is the conservative approach that satisfies both. That includes:

• Every invoice you send, including drafts and amended versions
• Shift records showing dates, times, duration, and what support was delivered
• Payment confirmations or receipts
• Any correspondence with plan managers about queried invoices
• Records of the compliance documents you held at the time of each shift

Digital records are fine — bank statements, invoice PDFs, and shift app exports all count. The point is that you can show what you did, when you did it, and that you were paid appropriately.