Common NDIS Invoicing Mistakes (And How Plan Management Prevents Them)

A small mistake can cause a big headache

NDIS invoicing sounds straightforward — a provider does the work, sends an invoice, gets paid. But in practice, there’s a surprising amount that can go wrong. Incorrect invoices mean delayed payments, frustrated providers, and unnecessary stress for participants and their families.

Here are the most common invoicing mistakes we see — and how having a good plan manager in your corner prevents them.

Mistake 1: Using the wrong support item or line code

Every NDIS support has a specific item number from the NDIS Support Catalogue. If a provider invoices using the wrong item number — even accidentally — the claim can be rejected by the NDIA portal.

This is one of the most common errors, especially with newer providers who aren’t as familiar with the catalogue. A plan manager will catch this before submitting the claim and follow up with the provider to get it corrected.

Mistake 2: Charging above the NDIS price guide rate

The NDIS sets maximum prices for most support categories through its Support Catalogue and pricing arrangements. Some providers — particularly those who work across both private and NDIS clients — occasionally invoice at rates above the allowed maximum.

A plan manager will flag this immediately and work with the provider to issue a corrected invoice at the right rate. If you’re self-managing, catching this yourself requires knowing the price guide inside out.

Mistake 3: Missing or incorrect invoice details

For an NDIS invoice to be valid, it generally needs to include the participant’s name, the provider’s ABN, the date(s) of service, a description of the support, the quantity and rate, and the total amount. Missing any of these can cause a claim to be rejected.

Plan managers deal with invoices every day and know exactly what needs to be on them. If something’s missing, they’ll contact the provider and sort it out — without it becoming your problem.

Mistake 4: Claiming from the wrong budget category

NDIS funding is split across Core, Capacity Building, and Capital categories, and most funds can only be spent within their category. Claiming a support from the wrong budget can cause a rejection — and if done repeatedly, it can attract scrutiny from the NDIA.

Your plan manager keeps track of which supports should be claimed from which category and makes sure everything lines up correctly.

Mistake 5: Duplicate invoicing

It happens more often than you’d think — a provider accidentally submits the same invoice twice, or two invoices are issued for the same session. Without someone actively monitoring your account, duplicate payments can slip through and quietly drain your funding.

Plan managers maintain detailed records of every claim and will pick up duplicates before they’re paid out.

Mistake 6: Invoicing for supports that weren’t delivered

Unfortunately, this does occasionally happen — whether through genuine error or something more concerning. A good plan manager will cross-reference invoices against your service agreements and query anything that doesn’t look right.

This is one of the most important protections a plan manager provides. Your funding is there to support you — and it should only ever be spent on supports you’ve actually received.

How The Plan Management People keep your invoicing on track

At The Plan Management People, checking invoices carefully before processing them is just part of the job. We review every claim, follow up on errors, and make sure your funding is being used correctly and efficiently.

We also process payments fast — usually within 2 business days — so your providers are never left waiting, and you’re never dealing with unhappy support workers.

And as always, plan management is funded separately by the NDIS. It won’t cost you a cent.

📞 Call us: 0456 977 362
💌 Email: admin@pmpeople.com.au
🌐 Visit: www.planmanagementpeople.com.au