ABN Assist 1800 546 526FREE HELP · BUSINESS HOURS
Home / Business calculators / GST turnover calculator

GST turnover calculator: is your ABN near the line?

$75,000 of rolling 12-month turnover makes GST compulsory. See where your run rate puts you.

12 months at this rate–
Of the threshold–

Driving for Uber, DiDi or Ola? The threshold doesn't apply. GST is required from your first fare, and our ride share ABN sets both up together.

The line moves with you, not the calendar

The $75,000 test isn't "what did last financial year total?". It's a rolling 12-month view that counts both what you've just done and what you reasonably expect. Sign a deal that guarantees crossing it and you've crossed it that day, with 21 days to get the GST registration onto your ABN. That's why a run-rate check like this one is worth doing every quarter while you're growing.

What the ATO counts as turnover

  • In: your business sales before GST, combined across everything trading under the same ABN.
  • Out: wages from employment, genuine hobby income, and input-taxed income like residential rent. Those never push you toward the line.
  • Special case: taxi and rideshare income makes GST compulsory from the first dollar, the threshold is irrelevant.

Just starting out?

If you're registering a new ABN and expect to pass $75,000 in your first year, the clean move is registering for GST at the same time, one application, no mid-year scramble, and credits on your start-up costs from day one. Our ABN application includes a GST option for exactly this. Not sure you even need an ABN yet? Start here.

Quick answers

Is the $75,000 measured per financial year?

No. It's a rolling 12 months, looking backward and forward at the same time. You cross whenever either view hits $75,000, which can happen in any month of the year.

Do I count GST in my turnover?

No. GST turnover is your sales before any GST. If you're already charging GST, strip it out (divide totals by 1.1) before comparing against $75,000.

What if I have a job and a side business?

Only the business counts. Salary and wages aren't enterprise turnover, a $90,000 job plus a $30,000 side business leaves you under the threshold.

I crossed the line months ago: what now?

Register now with a backdated start date. The ATO treats sales after the required date as GST-inclusive either way, so the sooner it's fixed the less it costs. It's handled as part of a GST registration.

Related: Do I need to register for GST? · ABNs for sole traders · All business calculators

New ABN with GST included? One application, same day.

Registered Tax Agent 26076969 · usually same-day · free help on 1800 546 526.

Register my ABN