NDIS Invoice Requirements Australia 2026: The Audit-Ready Guide for Support Workers

Key takeaways

• NDIS billing goes beyond a standard tax invoice. On top of your ABN and totals, each line needs the participant's reference number, the date and times of support, and the correct NDIS support item number.
• Every line must match the current Pricing Schedule. Support item numbers and price limits change each financial year. Use the 2026-27 versions for supports delivered from 1 July 2026, and never charge above the limit.
• Split your time properly. Day, evening, Saturday, Sunday, public holiday and travel are billed on separate lines, so your shift log has to record exact start and end times.
• Your shift log is your audit trail. If the details on the invoice and in your records don't match, that's the first thing that causes trouble.

ATO tax rules vs NDIA invoicing requirements

Two different sets of rules apply to the same piece of paper, and it helps to keep them separate. Think of it this way: the ATO wants to know what you sold and what tax applies. The NDIS wants to know which support, for whom, when, at what rate, and whether that rate is allowed.

• What the ATO cares about: tax rules. If you're registered for GST and make a taxable sale, you need a tax invoice showing your identity and ABN, the date, a description of what was supplied, the quantity and price, and the GST amount. Most NDIS supports are GST-free, so for many sole traders the GST part never comes into play — but the ATO still expects you to keep records of your income for at least five years. If you're unsure whether GST applies, ask the ATO or a registered tax agent.
• What NDIS billing adds on top: the ATO doesn't care about plans or price limits, but plan managers have to check each invoice against the participant's plan and the NDIA's pricing rules before they can pay you. So you also need: your ABN and business name matching ABN Lookup; a unique invoice number and date; the service description plus the NDIS support item number; the participant's name (the plan holder); the 9-digit participant reference number; each support date, usually with start and end times; hours or units per rate type; a price at or below the limit for that item; and bank details so the plan manager can pay you.

1. Map every line to the current NDIS support item

Every line item needs a support item number that matches the support you delivered. A typical code looks like 01_011_0107_1_1, which covers assistance with self-care activities (standard, weekday daytime). The time-of-day rate is part of the code, so evening, Saturday, Sunday and public holiday work each use a different one. What to watch in 2026: the NDIA now publishes the "Pricing Schedule" — for 2026-27 it replaces the document previously known as the Pricing Arrangements and Price Limits, and older articles and templates may still use the previous name. Codes change between years: support items are added and removed each 1 July, so last year’s invoice template can contain a code that no longer works. And even a correct code can be rejected if it falls under a support category the participant’s plan doesn’t fund. Always confirm item numbers against the current NDIS Support Catalogue and Pricing Schedule on the NDIS website before you send.

2. Log accurate service dates and split durations

NDIS rates depend on when the support happens, so “4 hours on Tuesday” isn't enough. A shift from 6:00 PM to 10:00 PM, for example, is two hours at the weekday daytime rate and two hours at the weekday evening rate (evening starts at 8:00 PM). Billing it all at one rate is either an overcharge (which can be rejected) or an undercharge (which costs you money). Also remember: the invoice date can't come before the service date, and provider travel and kilometres have their own rules — check the current Pricing Schedule for what can be claimed, and show travel on its own line.

• The date of support.
• Exact start and end times.
• Any time that crosses into a different rate band.
• Provider travel, recorded separately.

3. Match the participant reference number and your ABN

Two identifiers cause a disproportionate number of rejections. A quick format check before sending (9 digits for the reference number, 11 for the ABN) catches the simple typos — but it cannot tell you whether the number belongs to the right participant, so always double-check against the service agreement.

• Participant reference number (NDIS number): 9 digits, and it must belong to the person who holds the plan. Invoice in the participant's name, not a parent's, carer's or plan manager's, even if the participant is a minor.
• Your ABN: it should be valid and match your business name on ABN Lookup. A transposed digit or an old trading name can stall payment.

4. Stay at or under the price limit

Price limits are maximums, not fixed rates. They vary by support item, time of day and location (national, remote and very remote), and they are reset each financial year. For 2026-27, support worker price limits increased from 1 July 2026 following the wage decision, while limits in some other categories moved up or down.

• Charge what you've agreed in the service agreement, up to the limit. A higher price limit doesn't automatically mean you can raise your rate for existing participants — review your agreement first.
• Check every line, not just the headline rate. Evening, weekend, public holiday and travel rates each have their own limit. A cap check on the wrong line is a classic reason for an invoice to be returned.

Audit trail best practices for sole traders

Most sole traders never get formally audited, but payment integrity checks, plan manager queries and participant disputes all come down to the same question: can you show what you delivered? Compliance and enforcement powers around the NDIS have also expanded, so being able to produce clean records is a sensible habit rather than a nice-to-have.

• Shift logs with date, start time, end time, participant and support type.
• Your service agreement with each participant.
• Copies of every invoice sent, plus proof of when and to whom it was sent.
• Travel records, including how the time or kilometres were calculated.
• Payment records, so you can match what was paid to what was billed.

How long to keep records

The ATO expects business records to be kept for at least five years. Many NDIS providers keep records for seven years to cover NDIS requirements, so it's worth checking the current rules that apply to you (they can differ depending on whether you're registered). Habits that protect you: log the shift on the day (reconstructing hours from memory weeks later is how mismatches happen); make sure the invoice matches the log; don't edit history quietly — issue a corrected invoice and keep the original; keep delivery proof (a sent-and-delivered record settles arguments about whether an invoice was ever received); review monthly for unbilled shifts and unpaid invoices.

Let Rayvice check every invoice before it goes out

Doing all of this by hand means a spreadsheet, a lot of lookups and a lot of re-checking. Rayvice reduces the chance of common errors, but you remain responsible for what you deliver and bill — it is a safety net, not a substitute for checking the service agreement and the current Pricing Schedule. Make your NDIS invoicing audit-ready: start your 9-day free trial (/register). No credit card required, and nothing is deleted when the trial ends. Related guides: what should an NDIS invoice include (/resources/what-should-ndis-invoice-include), NDIS support worker rates (/resources/ndis-support-worker-rates), how to send an NDIS invoice to a plan manager (/resources/how-to-send-ndis-invoice-to-plan-manager).

• Log a shift in about 30 seconds: date, times, participant and support category.
• Automatic rate splitting: hours are divided into day, evening, Saturday, Sunday, public holiday and travel rates from your start and end times.
• Price cap check: rates are checked against current NDIA price caps before the invoice is created.
• Identifier checks: your ABN and BSB format, and the 9-digit NDIS number, are validated up front, so typos get caught before the plan manager does.
• Invoice sent with delivery status: a tax-invoice PDF is emailed directly to the plan manager, and you can see whether it was delivered.
• Your records stay in one place: every shift you log and every invoice you send lives in your own account, which makes it far easier to answer a query months later.

Common questions

Official sources

NDIS rules change. Verify current figures on these official pages before invoicing:

• NDIS pricing arrangements (ndis.gov.au) — 2026–27 schedules, current as of 24 September 2026
• NDIS: Invoicing and record keeping