Proposed changes to tax laws, updates on bills, and policy announcements
Tax Policy
The Taxation (Use of Money Interest Rates) Amendment Regulations (No 2) 2025 was made on 8 December 2025. The Order in Council changes the use of money interest (UOMI) rates on underpayments and overpayments of taxes and duties in line with market interest rates.
The new UOMI underpayment rate is 8.97% (previously 9.89%) per annum. The new UOMI overpayment rate is 2.25% (previously 3.27%) per annum.
The new Order in Council can be found at:
Taxation (Use of Money Interest Rates) Amendment Regulations (No 2) 2025