New Zealand GST101A Return
Prepare your Inland Revenue GST101A worksheet - Boxes 5 to 15 - straight from your Odoo accounting data
New Zealand GST101A turns your posted Odoo invoices and bills into a complete, ready-to-file GST101A return worksheet for Inland Revenue (IRD). Every numbered box on the official form is computed for you, using the standard 15% GST rate expressed as the form's own 3/23 GST fraction, so the figures match a hand-completed paper return to the cent. You then file the worksheet through your own myIR account or on paper - the module prepares, it does not transmit.
Every GST101A box, computed correctly
GST on sales and income
- Box 5 - Total sales and income (including GST and zero-rated)
- Box 6 - Zero-rated supplies included in Box 5
- Box 7 - Box 5 minus Box 6
- Box 8 - Box 7 × 3 ÷ 23 (GST on sales)
- Box 9 - Output adjustments from your calculation sheet
- Box 10 - Total GST collected (Box 8 + Box 9)
GST on purchases and expenses
- Box 11 - Total purchases and expenses (including GST)
- Box 12 - Box 11 × 3 ÷ 23 (GST on purchases)
- Box 13 - Credit adjustments from your calculation sheet
- Box 14 - Total GST credit (Box 12 + Box 13)
- Box 15 - The difference, flagged as GST to pay or GST refund
Key features
Pulls figures from your ledger
One click gathers the period's posted customer invoices, credit notes, supplier bills and supplier credit notes, separates zero-rated supplies, and fills Boxes 5, 6 and 11 - GST-inclusive, exactly as the form expects.
Correct 15% / 3/23 maths
The GST content is computed with the official 3/23 tax fraction and a deterministic round-half-up to the cent, so Box 8 and Box 12 always agree with Inland Revenue's arithmetic.
IR372 adjustment lines
Capture private-use apportionment, entertainment, bad debts written off or recovered, change-of-use and fringe-benefit adjustments. Output adjustments flow to Box 9; credit adjustments flow to Box 13.
IRD number validation
Your GST registration / IRD number is validated with Inland Revenue's modulo-11 check-digit algorithm (primary and secondary weight sets), catching typos before you file.
Pre-filing checks
A built-in rule set confirms the return is internally consistent - Box 7, Box 8, Box 10, Box 12, Box 14 and Box 15 are recomputed and cross-checked, and zero-rated supplies cannot exceed total sales.
Worksheet export
Produce a plain-text GST101A box list and a CSV export to review, archive and transcribe into myIR or your paper return.
Filing frequency & accounting basis
| Setting | Options | Where |
|---|---|---|
| GST filing frequency | Monthly, two-monthly (default), six-monthly | Company GST settings |
| GST accounting basis | Payments (cash), Invoice (accrual), Hybrid | Company GST settings |
| GST registration number | Your IRD number (Box 1), validated on save | Company GST settings |
Prepare, review, file - on your own credentials
This module is a preparation worksheet. It builds and stores your GST101A figures inside your Odoo database. Lodgement to Inland Revenue is done by you through your own myIR login or a paper return - no data is transmitted by this module, and we are not an Inland Revenue agent or gateway.
Screenshots
Generate Gst101A
Gst101A Returns
Gst Settings
Update date: 2026-07-02