The GST Rate in Australia

That number is the easy part. The harder part is what sits underneath it: what the rate replaced, what it doesn’t apply to, where the dollars go after Coles or Bunnings hands them up the chain and whether the figure is likely to stay at 10% for the next twenty-five. We’ll work through each.

What the rate is right now

The Australian Taxation Office defines GST as ‘a broad-based tax of 10% on most goods, services and other items sold or consumed in Australia’. It applies to taxable sales made by businesses with a GST turnover at or above $75,000 ($150,000 for non-profits), and to every dollar earned by ride-share drivers regardless of turnover.

The rate works two ways depending on which direction you’re calculating:

• On a net price, you add 10% to find the gross. A $200 ex-GST quote becomes $220 inclusive.
• On a gross price, GST is one-eleventh of the inclusive total. A $220 receipt contains $20 GST, not $22.

That one-eleventh point matters more than people realise. If you’re verifying the GST on a tax invoice, the Reverse GST calculator does the divide-by-11 in one tap; for a quote, the Add GST calculator handles the multiply-by-1.1 side.

Where the 10% came from

The Howard government released its tax reform plan in August 1998 under the title ‘Tax Reform: not a new tax, a new tax system’. The Senate passed the supporting legislation in June 1999, and the GST took effect on 1 July 2000. Treasury has since described the package as one of the most extensive tax reforms in modern Australian history.

The flat 10% replaced a tangle of wholesale sales tax and inefficient state taxes – several at different rates depending on the product. The Parliamentary Budget Office records that the wholesale sales tax ‘had become a complex array of rates applying to different products’, and consolidating it into a single broad-based consumption tax was the central aim of the reform.

The GST also brought in a politically inseparable trade. All GST revenue – every dollar collected – flows to the states and territories rather than the Commonwealth. In return, the states agreed to drop a list of nuisance taxes like financial institutions duty and bed taxes, and the Commonwealth abolished the wholesale tax it had been levying since 1930.

What it applies to (and what it doesn’t)

A 10% rate sounds simple, but three categories sit alongside the standard rate:

• Standard 10%. Applies to most goods and services – petrol, coffee, restaurant meals, hardware, electronics, clothing, professional services and freight.
• GST-free (effective 0%). Applies to most basic food, most education, most health services, child care and exports. Suppliers don’t charge GST but can still claim GST credits on their inputs. The ATO’s GST-free sales page lists the categories in detail.
• Input-taxed. Applies to financial services and residential rent. Suppliers don’t charge GST but also can’t claim credits on related expenses. The economic effect is that GST gets buried in the supply chain and shows up in the final price anyway, which is one of the design quirks economists tend to flag.

The line between GST-free and input-taxed catches accountants out more often than the rate itself. A childcare invoice and a residential rent receipt look similar from the consumer side, but the accounting treatment behind them is different.

Where the GST money actually goes

Here’s where most Australians stop being curious and where the rate stops being a single number.

GST revenue flows to the Commonwealth Grants Commission, an independent body that recommends each year how the pool gets split between the states and territories. The split aims at horizontal fiscal equalisation – a concept the Productivity Commission describes as keeping each state ‘at least the equal of NSW or Victoria, whichever is higher’ in fiscal capacity.

That sounds dry on paper and it gets very loud in practice. Western Australia’s GST share dropped to about 30 cents in the dollar at the peak of the mining boom, because the iron-ore royalties counted against its need for federal grants. Public outcry, an extended argument and a 2018 deal followed.

The 2018 changes legislated a floor – no state could receive less than 70 cents per person per dollar of GST from 2022-23, rising to 75 cents from 2024-25. The Productivity Commission is required to review the operation of those changes by the end of 2026, with an issues paper already on the table.

If you have ever wondered why the GST rate is described as politically untouchable, this is half the reason. Lifting the rate would require the agreement of every state and territory, because they are the beneficiaries.

Will the 10% rate change?

We’re hedging this carefully because tax rates and political appetite both move.

The GST rate has held at 10% since 2000 despite repeated reviews. Treasury’s 2015 tax white paper canvassed broadening the base or lifting the rate as part of a wider tax mix shift, but no rate change followed. The Parliamentary Budget Office has costed alternative scenarios, including a ‘progressive GST’ modelled around higher rates on luxury items, but those are policy options on paper rather than government decisions.

Two things would need to change for the rate to move. First, a government would need to make the case publicly, with the income-tax and welfare-payment offsets that came with the original 10% in 2000. Second, every state and territory would need to agree, given the revenue is theirs.

Neither is impossible. Both are politically expensive. The most accurate near-term answer to ‘will GST go up?’ is the one any honest tax economist will give you: not soon, but not never.

How to calculate GST at the current rate

The two formulas that come from the 10% rate are short:

• Net × 1.10 = Gross (adding GST to a net figure)
• Gross ÷ 11 = GST (extracting GST from an inclusive total)

For a single calculation, the GST calculator on this site handles both directions in one input. For repeat work – BAS preparation, supplier reconciliations, bookkeeping – the dedicated Reverse GST calculator is faster because it skips the dropdown.

If you want the rule book, the ATO’s How GST works page is the authoritative reference, and ASIC’s MoneySmart publishes a GST calculator for spot-checks.

One last thing

Twenty-five years of a stable consumption-tax rate is unusual by global standards. New Zealand’s GST has moved twice in the same period (10% to 12.5% to 15%), the UK’s VAT shifted from 17.5% to 20% and Singapore’s lifted from 7% to 9%. Australia’s flat 10% has held because the political cost of touching it is high and the architecture that distributes the money is the part that gets fought over instead. The next test is the Productivity Commission’s 2026 review, which will hand its findings to the federal Treasurer before the end of the calendar year.

The calculators and guides on gstcalculator.net.au are for general information only and do not constitute tax, financial, or legal advice. Consult a registered tax agent for advice specific to your situation.