GST Registration for Small Businesses

Few questions come up earlier in a business's life than whether to register for GST — and few get answered with more guesswork. Some owners register on day one because it feels official; others put it off for years because it feels like paperwork. Both instincts can be expensive. Registration changes your prices, your invoices and your reporting rhythm, so it deserves a deliberate decision rather than a default.

When registration becomes compulsory

You must register once your GST turnover reaches the registration threshold — currently $75,000 for most businesses; check the current ATO figure. The test is not last year's tax return: GST turnover is a rolling calculation that looks at the current month plus the previous 11 months, and separately at the current month plus the projected next 11. A strong pipeline can tip you over before the cash has even arrived. Once you cross the threshold, you generally have 21 days to register.

There is one well-known exception. If you drive for a rideshare platform such as Uber, you must register for GST from your first dollar of driving income, regardless of turnover. This rule catches many part-time drivers who assume the threshold protects them.

Registering by choice

Below the threshold, registration is optional, and the right answer usually depends on who your customers are.

• Reasons to register early: you can claim GST credits on purchases — valuable in a setup phase heavy with equipment and fees; business customers claim the GST back anyway, so your price does not really rise for them; and you never have to watch the threshold nervously.
• Reasons to wait: if your customers are households, adding GST effectively raises your price by 10% against unregistered competitors; you take on BAS lodgement obligations; and your bookkeeping has to be tidy enough to support the figures every cycle.

What changes on the day you register

• Prices. Decide deliberately whether to add GST on top or absorb part of it — and check quotes already issued, because a price quoted without GST is painful to honour after registration.
• Invoices. Your invoices become tax invoices, showing your ABN, the words "tax invoice" and the GST amount or a statement that the total includes GST.
• Reporting. You lodge a BAS, quarterly for most small businesses, and you can generally choose to account for GST on a cash or accruals basis — cash suits most small operators because the GST follows the money.
• Discipline. The GST you collect is not yours. Transferring it to a separate account as you go turns BAS time from a scramble into a transfer.

What we commonly see go wrong

• Watching financial-year turnover instead of the rolling 12-month test, and registering months late as a result.
• Charging GST before the registration has actually taken effect, or not charging it after it has.
• Rideshare drivers not registering because their driving income is under the threshold.
• Late registration being backdated, so GST has to be carved out of income that was priced without it.
• Voluntary registrants spending the GST they collect, then meeting their first BAS with an empty account.

A worked example

As an illustration: a handyman quotes jobs two to three months ahead and watches his turnover only at tax time. Mid-year, a run of good work pushes his rolling 12-month turnover over the threshold. Because his outstanding quotes never mentioned GST, the GST on every job delivered after registration comes out of his own margin rather than the customer's pocket. A simple quarterly check of rolling turnover — and a line in his quotes reserving the right to add GST if registration becomes required — would have protected the margin entirely.

When to get help

If your turnover is anywhere near the threshold, if you are unsure whether registration would help or hurt your pricing, or if you suspect you crossed the line some time ago, it is worth getting specific advice before the next BAS cycle rather than after. Backdated registrations are workable, but they are always cleaner the earlier they are addressed.

When do I have to register for GST?

Once your GST turnover reaches the threshold — currently $75,000 for most businesses, check the current ATO figure — you generally have 21 days to register. The test uses rolling 12-month turnover, looking both backward and forward, not just your last tax return.

Do rideshare drivers really have to register even with low income?

Yes. Ride-sourcing drivers must register for GST from the first fare, regardless of turnover. The usual registration threshold does not apply to that income.

Is voluntary GST registration worth it?

It often is when your customers are mostly GST-registered businesses or you are buying significant equipment, because you can claim GST credits back. It is less attractive when you sell to households, since adding GST effectively raises your prices. It is worth modelling both ways before deciding.