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M01: Support start and/or end dates are not valid

An NDIA bulk payment request rejection code, from the NDIA’s own guide (December 2025).

M01

The message

“Support start and/or end dates are not valid”

What it means

The support dates are not valid.

Other manual codes

M02: Product selected is incorrect.
M03: Insufficient evidence or authorisation provided
M04: Incorrect participant, service booking or provider selected
M05: Selected quantity or unit price is incorrect.
M06: GST code selected is incorrect
M07: Payment request could not be successfully submitted due to some reason.

See every NDIA claim code

What this tool follows

NDIS myplace provider portal: Bulk payment requests self-help guide for providers (December 2025): Part 3, payment request rejections

General information only, not financial, legal or claiming advice. Always check a claim against the current official documents.

Questions people ask

What does NDIS claim rejection M01 mean?

M01: "Support start and/or end dates are not valid" The support dates are not valid.

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