The short answer
Consistently lodging BAS late can lead to ATO penalties and fines. Learn why lodging on time matters, even if you can’t pay.
Lodging your BAS late, again and again, leads to ATO penalties, interest on unpaid amounts and closer scrutiny of your business. Even if you can’t pay by the due date, lodge on time. Your BAS includes GST and PAYG withholding, which is money you collected on the ATO’s behalf, so persistent late lodgement is a red flag for deeper cash flow problems.
What penalties apply?
Failure-to-lodge penalties: charged for each 28 days (or part) the BAS is late, up to a maximum, and higher for larger businesses.
General interest charge: daily interest on any unpaid amount from the due date.
Loss of lodgement concessions: businesses with a poor history may lose access to extended due dates through their tax agent.
More scrutiny: repeated late lodgement can lead to ATO reviews and, in serious cases, director penalty notices for unpaid PAYG withholding and super.
Why lodge even if you can’t pay?
Lodging on time shows the ATO you’re engaged and lets them see what you owe. Failure-to-lodge penalties are avoided, and you can set up a payment plan for the balance. Not lodging is treated far more seriously than lodging and owing.
Why is late BAS a warning sign?
GST and PAYG withholding aren’t your money. If the funds aren’t there when the BAS is due, it usually means they’ve been spent on running costs. That points to a cash flow or pricing issue that needs fixing, not just a paperwork problem.
What should you do if you’re behind?
Talk to your bookkeeper or accountant straight away.
Catch up the overdue lodgements, oldest first.
Set up a payment plan with the ATO if you can’t pay in full.
Start a separate GST and tax account so it doesn’t happen again.
Review pricing and cash flow to fix the underlying cause.
A typical Melbourne scenario
A Footscray building contractor fell four quarters behind on BAS during a busy year. Penalties and interest added up, and ATO letters started arriving. Their bookkeeper lodged all four quarters within a fortnight, arranged a 12-month payment plan and set up weekly transfers into a GST account. They’ve lodged every BAS on time since.
Key takeaways
Late lodgement brings penalties, interest and scrutiny.
Always lodge on time, even if you can’t pay in full.
Late BAS often signals a cash flow problem.
A bookkeeper can catch you up and set up a payment plan.
General information only. Talk to your accountant or bookkeeper about your circumstances.
Read bookkeeping issues that trigger ATO attention, or see our small business bookkeeping and tax compliance services.
Marissa has over eight years of bookkeeping experience and a genuine passion for helping businesses take control of their finances. She's proactive, precise, and committed to making bookkeeping easy, accurate, and stress-free for every client she works with. Whether it's reconciling accounts, tracking cash flow, or streamlining financial systems, she's across the detail so you don't have to be.
