BAS, GST and the ATO calendar that quietly eats an Australian small business's year

Australian compliance is not hard so much as relentless. The deadlines arrive whether or not the work is done, and for most small businesses the reconciliation happens the weekend before it is due.

  1. Quarterly BAS is four deadlines you cannot move

    Business Activity Statements fall due at the end of October, February, April and July for quarterly lodgers. Every one of them needs the quarter's sales, purchases and GST reconciled first, which is where the weekend goes.

  2. GST registration is compulsory above $75,000 turnover

    Cross that threshold, or $150,000 for a not-for-profit, and registration is mandatory within 21 days. Plenty of growing businesses cross it mid-year without noticing until the accountant does.

  3. PAYG withholding and instalments are separate obligations

    Withholding is the tax you take out of staff wages; instalments are prepayments on your own income tax. They appear on the same BAS form, which is why they get conflated and why one often gets underpaid.

  4. Superannuation guarantee has its own quarterly clock

    Super is due 28 days after quarter end, not with the BAS, and it is one of the few obligations where being late removes the tax deduction entirely. The penalty structure is deliberately unforgiving.

  5. Single Touch Payroll reports every single pay run

    STP Phase 2 means payroll data goes to the ATO on or before each payday, not annually. Errors surface immediately now, which is better, but it means payroll has to be right every fortnight rather than once a year.

  6. Taxable payments annual reporting catches whole industries

    Building and construction, cleaning, couriers, IT and security services all have to report payments to contractors each August. If you subcontract, you are keeping a second set of records whether you meant to or not.

  7. Fringe benefits tax runs on a different year entirely

    The FBT year ends 31 March, not 30 June, which catches out anyone with a work vehicle, an entertainment budget or a phone allowance.

  8. Fuel tax credits are money most eligible businesses never claim

    If you run machinery, generators or heavy vehicles off-road, there are credits sitting on the BAS you may not be claiming. The rates change twice a year, which is exactly why people give up on them.

  9. Where AI actually helps

    Not by doing your tax. By keeping the source records clean as they happen: coding invoices when they arrive, flagging a missing receipt the week it goes missing, and telling you the quarter's position before the last weekend rather than during it.

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