Interest Calculator

This calculator estimates the amount of interest payable by a non-corporate Commonwealth entity to businesses for procurement contracts covered by RMG-417 Supplier pay on-time or pay interest policy.

* All form fields are required to be filled out.

Calculator Form


  • This calculator is only for use in relation to procurement contracts covered by Resource Management Guide No. 417 – Supplier Pay On-Time or Pay Interest Policy.
  • Businesses should note that the estimated amount of interest payable will be based on the information you have provided. The exact amount of interest payable is subject to confirmation with the relevant agency. 
  • In determining the amount of interest payable, factors such as relevant contract terms and public holidays should be considered.


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