Why Did the NDIS Reject My Invoice?
Most NDIS invoices are rejected for one of three reasons: the price charged exceeds the NDIS Price Limit, the Support Item Code does not match the participant’s plan budget, or the claim is a duplicate of a previously paid invoice.
The Verdict: Is a rejected invoice a sign of a bad business?
Best for: Providers who are following the rules but still getting “Error Code” emails and experiencing payment delays that threaten their ability to pay staff or themselves.
The Reality: NDIS rejections are almost never about your quality of care; they are about data mismatch. The NDIA’s automated systems have zero “common sense”—if your hourly rate is $0.01 over the cap or you use a code that was retired last month, the system stops your payment instantly.
The Bottom Line: You can’t be expected to be a full-time support worker and a full-time compliance expert. Most rejections are entirely preventable with the right tools. If you are seeing more than one rejection a month, your manual “copy-paste” system is broken, and it’s time to let Sole’s auto-validator handle the compliance for you.
Common NDIS Invoicing Mistakes (and How to Fix Them
Stopped payment? Here is how to decode the rejection message and get your money flowing again.
5 Reasons Plan Managers Reject Invoices
- Exceeding the Price Cap
- You charged $67.00/hr, but the NDIS limit is $65.47.
- You must issue a Credit Note for the original invoice and send a new one with the correct rate.
- Wrong Support Item Code
- Using a “Core Supports” code for a “Capacity Building” service.
- Check the participant’s plan goals and budget categories before invoicing.
- Missing “Tax Invoice” Details
- Forgetting to include your ABN or the Participant’s NDIS Reference Number.
- Ensure your invoice template includes all mandatory ATO and NDIA billing data.
- Future Dating
- Sending an invoice dated tomorrow. NDIS funds cannot be claimed until after the service is delivered.
- Only generate and send invoices once the support session is completed.
- Unauthorized Transport
- Claiming provider travel (07_010_0107_1_1) without prior agreement in the Service Agreement.
- Ensure travel costs are discussed and signed off by the participant before billing
NDIS Portal Error Codes Explained
| Error Code | What It Means | How to Fix It |
| C06 | Price exceeds limit. | Reduce your unit price to the NDIS maximum. |
| C02 / C05 | Service Booking issue. | The participant has no funds allocated or no booking exists. Contact the participant. |
| V04 | Duplicate Claim. | You or your plan manager has already claimed this date/time. Check your payment history. |
| C03 | Date out of range. | You are claiming for a date before the plan started or after it ended. |
| V21 | ABN Missing. | Update your provider profile with a valid ABN. |
Did I Commit NDIS Fraud?
Probably not. The NDIS distinguishes between Non-Compliance (accidental mistakes, like using the wrong code) and Fraud (intentionally claiming for services never delivered).
If you make a genuine mistake, email the Plan Manager or NDIA immediately to correct it. Honesty is your best protection.
How Sole Stops Rejections Before They Happen
- Auto-Price Check: Sole warns you instantly if your rate is higher than the NDIS limit.
- Valid Codes Only: We update our database weekly. You can’t select a “retired” code by accident.
- Mandatory Fields: You cannot hit “Send” unless the NDIS Number and Dates are filled in.
Frequently Asked Questions
Q: Can I charge an “Admin Fee” for invoicing?
A: No. The NDIS does not fund administrative fees. You can only charge for the direct support and agreed travel/non-face-to-face time.
Q: What if the participant runs out of funding?
A: You cannot claim from the NDIS. You will need to invoice the participant privately as a debt, but they may not be able to pay. Always check funds before delivering long-term service.