You only have to register for GST once your turnover crosses $60,000, but you are allowed to register before then. Sometimes that is a smart move, and sometimes it just adds paperwork. The answer turns on who your customers are.
Quick answer
You can register for GST voluntarily even if your turnover is below the $60,000 compulsory threshold. It is usually worth it if your customers are themselves GST-registered businesses (so the 15% you add does not cost them anything) and you have meaningful GST to claim back on purchases. It is usually not worth it if you sell mainly to the public, who cannot claim the GST back, because you either absorb the 15% or raise your prices.
The detail, in plain English
Registering does two things: you must add 15% GST to your sales, and you get to claim back the GST on your business purchases. Whether that nets out in your favour depends mostly on your customers.
- If your customers are GST-registered businesses, the extra 15% on your invoice is GST they simply claim back, so it does not really cost them. Meanwhile you recover GST on your own costs. This is the classic case where voluntary registration helps.
- If your customers are the general public, they cannot claim the GST back. You either raise prices by 15% (and risk looking dearer) or absorb it out of your margin.
- Up-front investment matters. If you are buying significant equipment or stock to start, registering lets you claim that GST back, which can be a useful early cash boost.
- Once registered, you are committed to filing GST returns on a regular cycle, which is real ongoing admin.
Two contrasting cases
| Business | Customers | Voluntary GST? |
|---|---|---|
| Freelance consultant to companies | GST-registered businesses | Often worth it — clients claim the GST back, you recover GST on costs |
| Weekend market food stall | General public | Often not worth it — customers can't claim it, so the 15% hits your margin or your price |
Same threshold, opposite answers. The consultant gains because their 15% is invisible to clients and they reclaim GST on costs; the stallholder loses because their customers carry the 15%.
Common mistakes to avoid
- Registering to look bigger. The status does not impress GST-registered clients and can raise prices for the public.
- Underestimating the admin. Registration means regular GST returns from then on.
- Forgetting your pricing. If you sell to the public, decide up front whether you absorb the 15% or pass it on.
- Ignoring the cashflow timing. The GST you collect is not your money; it is held for IRD.
Where this fits in your return
Voluntary registration is the flip side of the compulsory $60,000 threshold, and the decision-help on whether you must register is on our do I need to register for GST guide. Once registered, the ongoing work sits within our GST and provisional tax service.
How Fernway can help
We look at who your customers are, what GST you would recover, and your start-up costs, then tell you plainly whether voluntary registration helps or just adds admin. If it stacks up, we register you and set up the GST cycle; if it does not, we save you the paperwork. Fixed fee, agreed before we start.
Book a free 20-minute review and we will run the numbers for your situation.
This is general information only, not personalised tax advice. Confirm your situation with us or check ird.govt.nz.
In plain English: voluntary GST registration usually helps if you sell to GST-registered businesses and have costs to claim back, and usually hurts if your customers are the general public.
This is general information, not personalised tax advice.See our full disclaimer.