As part of our annual updates, IRD number validation will be updated to support higher numbers. The maximum valid IRD number will increase from 150,000,000 to 200,000,000.
The length of IRD numbers will not change. They will remain 9 digits.
Most organisations will not need to do anything, as the change will be managed by their intermediaries or digital service providers.
Only organisations using custom systems, or who perform manual IRD number checks, will need to make sure their IRD number validation recognises and accepts numbers in the new range.
This maximum valid IRD number increase will be included in updated specification documents (such as Payday Filing File Upload Specifications), available on our website from April 2026.
Payday filing through file upload services
Gateway users (such as digital service providers) can already access the information through the gateway customer support portal.
About the gateway customer support portal and the developer portal