Simpler BAS exists. It is not a rumour and it is not a holiday from GST. For most Australian small businesses it means the activity statement asks for three GST numbers: total sales, GST on sales, and GST on purchases. The old alphabet of G2, G3, G10 and G11 stops appearing on the form.

The Rosebery desk was of two minds, and both minds were right. For a single-rate electrician who sells labour and buys tools, three boxes are a kindness. For a café that sells GST-free bread next to taxable toasties, or a designer who started exporting files to a Singapore client, three boxes are how a wrong tax rate lives undetected until a review.

This essay is general information for Australian readers. It is not tax, legal or BAS advice. Eligibility, labels and the option to report in full are ATO settings. Confirm them on your current activity statement before you change software or a habit.

What the form still wants

On a Simpler BAS GST section you typically lodge:

• G1 — total sales. This is still a GST-inclusive figure for most files, covering taxable sales and GST-free sales. It is not “just the taxable ones”. It is not bank deposits. It is the sales the GST law counts for this label.
• 1A — GST on sales. Ten per cent of the taxable part, on the method you elected (cash or accrual).
• 1B — GST on purchases. The input tax credits you are entitled to, after private use and input-taxed use.

You generally no longer write:

• G2 export sales
• G3 other GST-free sales
• G10 capital purchases
• G11 non-capital purchases

Wine equalisation tax, luxury car tax and fuel tax credits are not “simplified away”. If they apply, they still have labels. PAYG withholding and instalments still appear. Simpler BAS is a GST-reporting reduction, not a thinner business.

Who it is for

The published door is GST turnover under $10 million, with the usual GST definition of turnover: taxable and GST-free supplies, looking across the current and projected year. Input-taxed supplies stay out. GST itself stays out. If you are near the line, do not take comfort from a software dashboard. Work it the way you would work GST registration.

Most owner-operators who read this journal are under that line. That does not mean Simpler BAS is the right management choice. It means the ATO will accept the three-box form if you are eligible and have not opted back into full reporting.

Some entities never get the three-box form: certain specialised GST reporters, and anyone the ATO has left on full labels. Look at the statement you actually received. The labels printed on it are the ones you must lodge.

Why the ATO made it simpler

The old full BAS asked small files to split GST-free sales from taxable, and capital purchases from the weekly milk. Plenty of honest bookkeepers guessed G3 and G10 at the end of the quarter because the chart of accounts had never separated them. The guesses were not useful to the ATO at that scale, and they were a weekend of fiction for the owner.

Simpler BAS moved the split off the form and left it in the records. That is the sentence people miss. The law did not stop caring whether a sale was GST-free. It stopped asking you to write the total on the statement.

When it helps

It helps when the underlying file is already simple.

A residential electrician in Bankstown invoices labour and materials, all taxable, no exports, no residential rent inside the trading entity, a ute with a logbook, and a handful of tool invoices. G1 is the taxable sales including GST. 1A is one-eleventh of those sales if everything is 10 per cent and there are no rounding traps. 1B is the credits on rent, materials, the phone and the tools, reduced for the private slice of the ute. Three boxes, and a tax-rate report that shows almost everything at GST on income / GST on expenses.

It also helps when the owner will otherwise invent G3. A wrong G3 on a full form is a wrong conversation with the ATO. No G3 on a Simpler form is fine if the 1A is still right.

Monthly reporters gain less than they hope. The 21st still arrives. You have only saved the minutes you used to spend allocating capital purchases to G10. If those minutes were the only thing standing between you and a late lodgement, the problem was never the labels. See the BAS lodgement calendar.

When it hides

It hides the split you still need to manage.

GST-free sales. A café in Enmore with a mapped till should still be able to say what share of G1 was GST-free bread and milk. Simpler BAS will not ask. If the till map breaks, 1A drifts, and nobody has a G3 to compare. The drift looks like “GST is a bit low this quarter” instead of “the toastie button is coded GST-free”.

Exports. A brand designer in Surry Hills starts invoicing a Singapore retailer. Exports are generally GST-free if they meet the tests. On a full BAS, G2 would have shown the new stream. On Simpler BAS, G1 grows and 1A does not. That can be correct. It can also be a domestic invoice you forgot to tax. Without a GST-free income account, you cannot tell.

Capital purchases. You buy a $22,000 (including GST) espresso machine. On a full BAS, G10 would have made the quarter look like a capital quarter. On Simpler BAS, 1B simply gets larger. That is allowed. It is also how a capital item gets coded as repairs, or a repair gets coded as an asset, and nobody sees it until the tax return. Company tax is 25 per cent for a base-rate entity and 30 per cent otherwise. Depreciation and write-offs live in that return. The activity statement no longer waves the flag.

Input-taxed activity. Simpler BAS does not create a box for residential rent you should have excluded from G1. If you drop that rent into sales, G1 is wrong and 1A may be wrong. Full reporting did not magically prevent this either, but G1 had more neighbours to compare.

Credits you should not have claimed. 1B is a single number. Private use, input-taxed use and missing tax invoices all hide in it. Mixed supplies and input tax credits still apply. The form just stopped itemising the purchases.

The software still has to be full

This is the operational point. Xero and MYOB still need the right tax rate on every invoice and bill. Simpler BAS is a reporting option at lodgement. It is not a licence to use one tax rate called “GST” on every line and hope 1A looks plausible.

Keep:

• separate income accounts for taxable, GST-free and input-taxed streams if they are regular
• a capital-acquisitions account, even though G10 is gone
• a GST control account reconciled to 1A and 1B
• a tax-rate report as part of the month-end close
• the source documents that would have supported G2, G3 and G10

If you cannot reprint a G3 from the ledger, you cannot defend 1A. That is the whole critique.

A design studio as a worked fork

Southpaw Studio, a two-director company in Chippendale, GST-registered, cash GST, Simpler BAS.

• Domestic design fees, all taxable: $132,000 including GST in a quarter. 1A from this stream: $12,000.
• A new Singapore client, GST-free export if the tests are met: $22,000. G1 includes it. 1A does not.
• Software subscriptions and contractors, credits of $3,400 after private-use on phones.
• A $8,800 (including GST) workstation, coded to computer equipment, credit $800.

Simpler BAS: G1 $154,000, 1A $12,000, 1B $4,200. That can be right.

Now hide a mistake: the Singapore invoice was actually a Sydney fashion label with a Singapore billing entity, and the supply was connected with Australia. It should have been taxable. G1 is unchanged. 1A should have been $14,000. Simpler BAS will not hint at this. A GST-free income account that the directors review will. Full BAS would have shown a G2 the agent could smell.

The same quarter, the workstation is coded to “office supplies”. 1B is still $4,200. The return now treats an asset as an expense. Company tax at 25 per cent (if they are a base-rate entity) moves. Simpler BAS does not mention it.

When to go back to full

Go back, or keep a full internal report even if you still lodge Simpler, when any of these are true:

• GST-free or export sales are material or growing
• you hold residential property or make other input-taxed supplies in the same entity
• capital spend is lumpy and the agent wants G10 back as a conversation
• you are approaching the $10 million turnover line
• a review, a sale of the business, or a new finance facility has started asking for a GST split
• 1A as a percentage of G1 jumps around and nobody can explain it in a sentence

You can usually elect to report the full labels even while eligible for Simpler BAS. That election is an ATO and software setting, not a vibe in a spreadsheet. Ask the registered agent to change it at the start of a tax period, not mid-quarter.

If you go back, do not invent history. Start from the next period, keep the old working papers, and map the extra labels to accounts you already have. If you do not already have those accounts, the problem was never Simpler BAS. It was the chart.

What a Rosebery working paper still printed

Even when the form had three GST boxes, the cupboard file had a fourth page:

• G1 built from the sales accounts, not from the bank
• taxable, GST-free and input-taxed as internal subtotals
• 1A and 1B tied to the GST control
• capital additions listed, with invoice numbers
• a sentence on exports, grants, insurance recoveries and anything that would confuse next quarter

Books a tax agent can use are books that can produce that page. Simpler BAS is allowed to be the form you lodge. It is not allowed to be the only GST report you can print.

The original firm said it would give you validated numbers for a BAS return. Validation did not mean fewer boxes. It meant the boxes you still have — G1, 1A, 1B — reprint from a ledger that knows the boxes you no longer have. The BAS and GST hub is built on that distinction. Use the simpler form when the file is simple. Keep the fuller file anyway.