About this calendar

IR328 lists key filing and payment dates from April 2026 to March 2027. The dates shown generally apply to people and organisations with a March balance date.

Before relying on a date

Check the notice, return or myIR account for the date that applies to you. Weekend and public-holiday rules may change the day a filing or payment is treated as on time.

Related forms

• Individual tax return (IR3)
• Income tax return: Companies (IR4)
• Goods and services tax return (GST101A)

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