April 2026

7 April

• Payroll tax returns due

21 April

• Monthly BAS for Mar 2026 due

28 April

• Quarterly BAS for Q3 (Jan–Mar 2026) due
• Super guarantee payments for Q3 due

30 April

• R&D Tax Incentive claims due for FY 2025–26

Note: If ATO due date falls on a weekend, the due date is the next business day.