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NZ GST Calculator Tātaitai GST

Calculate 15% GST in either direction. Instant, accurate, free, no signup.

GST Calculator

Decimals OK. Commas are stripped.
Standard NZ GST is 15%.
Excluding GST $0.00
GST component $0.00
Including GST $0.00

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For reference

Standard NZ GST due dates Ngā Rā Tika GST

Based on a 31 March balance date. Yours may differ if you have an alternative balance date or special circumstances.

Two-monthly GST

Most small businesses file two-monthly. Each return covers 2 months and is due the 28th of the following month.

  • 28 JunApril + May return
  • 28 AugJune + July return
  • 28 OctAugust + September return
  • 15 JanOctober + November return (Christmas adjustment)
  • 28 FebDecember + January return
  • 7 MayFebruary + March return (year-end)

Six-monthly GST

For smaller businesses with simple GST. Two returns per year, aligned with the financial year halves.

  • 28 OctApril to September return
  • 7 MayOctober to March return

Monthly GST

For larger businesses or those with strong cashflow needs. Each return due on the 28th of the following month, with Christmas and year-end adjustments.

  • 28thof the following month, every month
  • 15 Jancovers November (Christmas adjustment)
  • 7 Maycovers March (year-end adjustment)

For your personalised year-ahead, try the tax deadline tracker.

Want us to handle GST returns?

GST return preparation and filing is included in our Growth and Comprehensive packages. From $440/month inc GST.

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Or call 07 543 0872