New Zealand · GST Guide

GST handled end-to-end.

From the invoice you send to the return you file with IRD — PayWren calculates, tracks, and reports NZ GST automatically. No spreadsheets, no manual maths.

Start free — GST sorted →
No credit card required
01

GST on every invoice — inclusive or exclusive

Every invoice you create in PayWren automatically calculates the NZ 15% GST split. Choose whether your rate is GST-inclusive (e.g. $115 total) or GST-exclusive (e.g. $100 + $15 GST) — PayWren handles the arithmetic and outputs a fully IRD-compliant tax invoice either way.

Your invoice always shows the subtotal, GST amount, and total as separate line items — exactly what IRD requires.

Subtotal$1,000.00
GST (15%)$150.00
Total NZD$1,150.00
02

GST on expenses captured by AI

Every business expense has GST on it — fuel, software subscriptions, materials, phone bills. That GST is claimable and reduces your net GST liability.

Photograph a receipt with PayWren's mobile app. AI reads the vendor, date, total amount, and GST amount automatically. No manual data entry, no missed claims.

Bunnings Warehouse$100.00GST $13.04
Spark Business$167.00GST $21.74
BP Fuel$65.50GST $8.52
Adobe Creative Cloud$36.75GST $4.79
03

IRD return numbers — ready to copy

When your GST period ends (monthly, two-monthly, or six-monthly), PayWren's Reports page shows you the exact figures for each IRD GST return box. No calculator required.

Box 5 (total sales), Box 6 (GST collected), Box 11 (total purchases), Box 13 (GST on purchases). Copy the numbers into myIR and file. Done in minutes.

GST Return — Feb 2026
Box 5Total sales & income(incl. GST)$12,450.00
Box 6GST collected on sales$1,630.43
Box 11Total purchases & expenses(incl. GST)$3,210.00
Box 13GST you can claim$421.30
GST to pay IRD$1,209.13

Common questions

GST questions, answered.

Do I need to be GST-registered to use PayWren?
No. PayWren works for both registered and non-registered businesses. If you're not registered, simply don't add GST to your invoices — the GST field is optional. When you cross the $60,000 threshold and register, PayWren switches on immediately.
GST-inclusive vs GST-exclusive — which should I use?
It depends on how you quote. If you tell clients a flat price (e.g. '$500 for the job'), that's inclusive — GST is already inside. If you quote $500 + GST, that's exclusive. PayWren lets you set a default and override it per invoice.
How does the IRD GST return work with PayWren?
PayWren calculates your GST return figures from your invoices and expenses for any date range. Head to Reports, select your GST period, and you'll see Box 5, 6, 11, and 13 pre-filled. Copy them into myIR and submit.
What if my receipt doesn't have GST on it?
Some purchases are GST-exempt (e.g. bank fees, certain insurance). AI will read a zero GST amount, and you can edit it manually if needed. Only GST-registered suppliers charge GST, so PayWren handles both scenarios.
Can I handle two-monthly or six-monthly GST filing?
Yes. The Reports page lets you pick any date range, so you can pull figures for your exact GST period regardless of whether you file monthly, two-monthly, or six-monthly.

GST sorted from day one.

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