Advanced GST Rules: Groups, Reverse Charge and IRD Adjustments

Advanced GST Rules is our hub for the harder New Zealand GST topics that sit beyond everyday add and remove maths. Once you are registered and filing, these are the rules that usually trip people up: grouping companies, imported services, change in use, associated persons, and IRD reviews.

This page is for the 2026/27 tax year (1 April 2026 to 31 March 2027). It explains what Inland Revenue (IRD) expects in plain English, then points you to the detailed posts listed below. It is not a substitute for advice on complex structures.

What “advanced” GST means in practice

The standard rate is still 15%, as stated on IRD’s GST overview. Advanced rules are not a different rate. They are special cases in the Goods and Services Tax Act 1985 and IRD guidance for groups, overseas supplies, apportionment, and niche transaction types.

If you still need the basics first, start with the GST Guide NZ category and the free GST calculator. For the wider system overview, see the ultimate guide to GST in New Zealand.

GST group registration

IRD’s GST overview notes that if you have many GST registered entities, you can form a GST group to reduce compliance costs. In a company group, members are generally treated as one taxable person. A representative member files for the group. Intra group taxable supplies are usually disregarded, which cuts duplicate invoicing between related companies.

Who can group is set out in Tax Technical interpretation statements IS 24/02 (grouping for companies) and IS 24/03 (who can group register). Mixed groups (companies with non companies or limited partnerships under common control) have their own tests. Practical steps sit in our GST group registration guide.

Grouping does not wipe every special rule. Imported services subject to the reverse charge are a key exception: IS 24/02 explains that reverse charge supplies cannot simply be ignored as intra group. Intercompany charges outside a clean group also need care. See GST on intercompany management fees.

Reverse charge on imported services

When a non resident supplies services into New Zealand, GST may not be charged on the invoice. If the reverse charge applies, the New Zealand recipient is treated as making the supply and must account for GST. IRD’s GST plus guide (IR546) walks through the idea with a worked software example.

In broad terms, if you estimate (or later find) that taxable use of those imported services is less than 95%, you add GST to the cost and include it in your return, then claim the taxable share as an expense. That is not the same as ordinary Customs GST on goods. Detail: GST on imported services: the NZ reverse charge rules.

Overseas sellers also have separate regimes for remote services, low value imported goods (from 1 December 2019), and listed services via marketplaces (from 1 April 2024). Those sit on IRD’s GST for overseas businesses page and in our GST digital services (Netflix tax) guide.

Change in use and apportionment

If you claim GST on a purchase based on intended taxable use, and actual use later differs, you may need a change in use adjustment. IRD’s change in use adjustments page sets out when an adjustment is not required, including where GST exclusive cost is $10,000 or less, or where the adjustment is under $1,000 and the change in taxable use is under 10%.

GST exclusive cost Adjustment periods (IRD)
Up to $10,000 0
$10,001 to $20,000 2
$20,001 to $500,000 5
Over $500,000, or land of any value 10

There are also wash up and final disposal adjustments in the same IRD guidance. Vehicles and mixed use assets are covered in GST on mixed use assets, GST change of business use, and GST asset removal. Related property posts live under the property and assets GST category.

Associated persons and market value

Supplies between associated persons often cannot be priced “at whatever we write on the invoice.” Output tax and input tax can be limited to open market value, and input tax claimed from an associated supplier is capped by what that supplier returned. If related parties transfer assets, loan staff, or share premises, read associated persons and GST before you file. Buying or selling the whole business is a separate zero rating question covered in GST on buying or selling a business.

Niche supplies that break the simple 15% pattern

Some transactions need their own timing or value rules. Common ones in this category include vouchers and gift cards, legal settlements and awards, grants and subsidies, directors fees, cryptocurrency, financial services B2B zero rating, and ecommerce returns.

For day to day expense claims such as entertainment or bad debts, use the business and expenses GST category. Industry specific posts sit under industry specific GST.

Errors, audits, liquidations, and due dates

If a return was wrong, fix it early. Steps are in how to correct GST return errors. If IRD asks questions, start with GST audit preparation NZ, the longer IRD audit preparation checklist, and GST audits and disputes.

Business failure has its own GST timing. See liquidations and receivership. Filing dates for ordinary returns are listed on the GST tax due date calendar. Late payment estimates use the late GST penalty calculator.

GST returns and provisional tax can land on the same calendar. How they interact is covered in GST provisional tax, and instalment maths sit in the provisional tax calculator. Invoices for complex supplies still need taxable supply information: use the GST invoice generator.

What this Advanced GST Rules page is checked against

Last full check: 25 August 2026. Grouping, reverse charge, change in use thresholds, overseas regimes, and the 15% rate were matched to ird.govt.nz/gst, IRD change in use adjustments, GST for overseas businesses, IR546, and Tax Technical statements IS 24/02 and IS 24/03. GSTCalc.nz is a free New Zealand publisher of tax calculators and guides. Ads may fund the site. We are not Inland Revenue and this is not tax advice. Figures are working papers.

Publisher details: About us and Contact. Privacy: Privacy policy. The articles listed below this description are the detailed Advanced GST Rules posts.