GST-Free Sales Basics

"There's no GST on it" sounds like the end of the conversation, but in the GST system it is only the beginning. A sale can carry no GST because it is GST-free, or because it is input-taxed — and the two have very different consequences for the credits you can claim and the way your BAS is built. This article covers the first kind; the essential thing to hold onto is that they are not the same.

What GST-free actually means

A GST-free sale has no GST in the price, but it still lives inside the GST system. You report it on your BAS, it generally counts toward your GST turnover — and, crucially, you can still claim GST credits on the purchases you make to produce it. A business selling GST-free goods still claims the GST on its rent, equipment and accounting fees. That credit entitlement is the defining feature, and it is what separates GST-free from input-taxed.

The common GST-free categories

• Most basic food — bread, milk, plain fresh fruit and vegetables, and many staple grocery lines. The boundaries are famously fine: the same product can change status depending on whether it is hot, prepared, or eaten on the premises.
• Most health and medical services supplied by recognised health professionals, along with many medicines and medical aids.
• Eligible education courses and closely related materials — though short courses and general-interest training are often taxable.
• Exports, generally, provided the goods leave Australia within the required timeframes and the paperwork proves it.

Each category carries detailed conditions, so treat this list as a map rather than a ruling — when a sale sits near a boundary, the specific ATO guidance for that product or service is the reference that matters.

GST-free versus input-taxed

Both kinds of sale leave GST out of the price, and the customer sees no difference. The difference sits entirely on your side of the BAS. Make GST-free sales and you still claim GST credits on the costs behind them. Make input-taxed sales — residential rent and most financial supplies — and the credits on the related costs are denied. Coding one as the other does not change a single invoice, but it quietly changes your BAS every quarter.

The mixed-sales coding trap

The hardest files are the ones selling both. A café sells GST-free grocery lines next to taxable coffee; a clinic sells GST-free consultations and taxable supplements from the same counter; a grocer's basket is a mix decided item by item. The point-of-sale system or item list has to carry the right tax code per product, because nobody is making that decision transaction by transaction. Set-and-forget defaults are where these files go wrong.

What we commonly see go wrong

• Every item in the point-of-sale defaulted to taxable — overpaying GST on genuinely GST-free lines — or defaulted to GST-free, quietly understating GST every quarter.
• New products added to the item list without anyone deciding the tax code.
• Export sales coded GST-free without shipping evidence or attention to the timing conditions.
• GST-free and input-taxed treated as interchangeable "no GST" codes, corrupting both the sales and the credits side of the BAS.

A worked example

As an illustration: a health clinic codes everything through the till as GST-free because "we are a medical practice". The consultations mostly are — but the supplements, skincare and devices sold at reception are taxable. Every quarter, the BAS understates GST on sales in the same pattern, and the shortfall compounds quietly in the background. A one-off review of the item list, setting the correct code per product, fixes every future quarter at once — and the earlier it happens, the smaller the cleanup behind it.

When to get help

If your business sells a mix of taxable and GST-free items, if a product sits near one of the fine category boundaries, or if your no-GST sales have all been landing on a single default code, a one-off review of your item list and coding is cheap insurance. It is far easier to set the codes correctly once than to unpick quarters of an established pattern later.

Can I still claim GST credits if my sales are GST-free?

Generally yes — that is the defining feature of GST-free sales. You charge no GST to customers but can still claim credits on the business purchases behind those sales, which is why predominantly GST-free businesses often receive BAS refunds.

How is GST-free different from input-taxed?

Neither adds GST to the price, but GST-free sales keep your entitlement to GST credits on related purchases, while input-taxed sales — such as residential rent — take it away. Coding one as the other distorts your BAS even though the customer sees no difference.

Do GST-free sales count toward the GST registration threshold?

Generally yes — GST-free sales are included in GST turnover, while input-taxed sales are generally excluded. A business with mostly GST-free sales can still be required to register once turnover reaches the threshold, currently $75,000 — check the current ATO figure.