Goods and Services Tax Act 1985

Returns and payment of tax - Calculation of tax payable: deductions, apportionment, other adjustments

21B: Adjustments when person or partnership becomes registered after acquiring goods and services

You could also call this:

"Getting back GST on things you bought before registering for GST"

Illustration for Goods and Services Tax Act 1985

If you buy things before you register for GST, you might be able to get some of that GST back. This can happen if you use those things to make sales that have GST on them. You need to keep a record of what you bought and how you used it.

When you register for GST, you can ask for an adjustment to get some of that GST back. The adjustment period starts when you bought the things and ends on your first balance date after you registered. You must have a record of the details of what you bought and use a fair method to work out how much of the things you used for your sales.

If you buy second-hand things, the GST rate that applies is the one that was used when you bought them.

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View the original legislation for this page at https://legislation.govt.nz/act/public/1986/0120/latest/link.aspx?id=DLM83928.


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21A: When adjustments required, or

"When you need to fix mistakes in your tax calculations"


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21C: Adjustments for first and subsequent adjustment periods, or

"Fixing tax mistakes for the first time and later"

Part 3Returns and payment of tax
Calculation of tax payable: deductions, apportionment, other adjustments

21BAdjustments when person or partnership becomes registered after acquiring goods and services

  1. This section applies when—

  2. before becoming a registered person, a person that is not a unit title body corporate acquires
    1. goods or services on which tax has been charged under section 8(1):
      1. goods entered by them for home consumption under the Customs and Excise Act 2018 on which tax has been levied under section 12(1):
        1. secondhand goods—
          1. that are supplied to the person by way of sale; and
            1. that have always been situated in New Zealand or have had tax levied on them as described in subparagraph (ii); and
              1. the supply of which is not a taxable supply; and
            2. at the time of registration or at a later time, the person or a partnership of which the person is a member (the registered user) uses the goods for making taxable supplies.
              1. The registered person may make an adjustment under section 21, 21A if the registered user meets the requirements of subsection (3) for the supply, or 21FB, treating, as the first adjustment period, the period (the initial period) that—

              2. starts on the date of the acquisition of the goods or services; and
                1. ends on the first balance date that falls after the events referred to in subsection (1)(b).
                  1. A registered user meets the requirements of this subsection for a supply by—

                  2. having a record of the details of the supply required by either of—
                    1. section 19F for a taxable supply:
                      1. section 19H for a supply that is not a taxable supply; and
                      2. using a method that provides a fair and reasonable result in identifying the percentage actual use of the goods or services in the initial period referred to in subsection (2).
                        1. Repealed
                        2. In relation to a supply of secondhand goods, the tax fraction applying to the supply is the tax fraction that applied at the time the goods were purchased by the person.

                        Notes
                        • Section 21B: substituted, on (applying to supplies made on or after 1 April 2011), by section 15(1) of the Taxation (GST and Remedial Matters) Act 2010 (2010 No 130).
                        • Section 21B heading: amended (with effect on 1 April 2011), on (applying to supplies made on or after 1 April 2011), by section 239(1) of the Taxation (Tax Administration and Remedial Matters) Act 2011 (2011 No 63).
                        • Section 21B(1)(a): replaced (with effect on 1 April 2011), on , by section 218(1) of the Taxation (Annual Rates, Returns Filing, and Remedial Matters) Act 2012 (2012 No 88).
                        • Section 21B(1)(a): amended (with effect on 26 February 2015), on , by section 277 of the Taxation (Annual Rates for 2015–16, Research and Development, and Remedial Matters) Act 2016 (2016 No 1).
                        • Section 21B(1)(a)(ii): amended, on , by section 443(3) of the Customs and Excise Act 2018 (2018 No 4).
                        • Section 21B(1)(b): replaced, on , by section 24(1) (and see section 24(4) for application) of the Taxation (Annual Rates for 2021–22, GST, and Remedial Matters) Act 2022 (2022 No 10).
                        • Section 21B(2): amended, on , by section 224 of the Taxation (Annual Rates for 2024–25, Emergency Response, and Remedial Measures) Act 2025 (2025 No 9).
                        • Section 21B(2): amended, on , by section 140 of the Taxation (Annual Rates for 2022–23, Platform Economy, and Remedial Matters) Act 2023 (2023 No 5).
                        • Section 21B(2): amended, on , by section 24(2) (and see section 24(4) for application) of the Taxation (Annual Rates for 2021–22, GST, and Remedial Matters) Act 2022 (2022 No 10).
                        • Section 21B(3): replaced, on , by section 24(3) (and see section 24(4) for application) of the Taxation (Annual Rates for 2021–22, GST, and Remedial Matters) Act 2022 (2022 No 10).
                        • Section 21B(4): repealed (with effect on 1 April 2011), on , by section 218(3) of the Taxation (Annual Rates, Returns Filing, and Remedial Matters) Act 2012 (2012 No 88).
                        • Section 21B(5): inserted (with effect on 1 April 2011), on , by section 218(4) of the Taxation (Annual Rates, Returns Filing, and Remedial Matters) Act 2012 (2012 No 88).