Highlights

  • ATO schedules a 20-hour maintenance window on 17–18 October.
  • A second reporting-system outage runs on 24–25 October.
  • Self-lodgers should plan ahead of the 31 October deadline.
  • Checking myGov access early reduces avoidable delays.

A quiet Sunday may seem like the perfect time to finish a tax return. This October, that plan could collide with scheduled technology work. With the self-lodgment deadline approaching, Australians relying on myTax need to pay attention not just to the calendar, but to the hours when digital services may be interrupted.

Two Weekends, Two Different Disruptions

The Australian Taxation Office has scheduled maintenance from 10pm AEDT on Saturday 17 October until 6pm Sunday 18 October 2026. That is a 20-hour window. A second scheduled event runs from 11pm AEDT on Saturday 24 October to 11am Sunday 25 October, affecting Standard Business Reporting channels. The precise effect on individual online services may vary, so neither window should be treated as a guaranteed complete myTax shutdown. Still, an outage warning is a poor companion to a nearly finished return.

Why the Clock Matters Across Australia

Maintenance times are published in Australian Eastern Daylight Time, which does not match clocks nationwide. When the first window begins at 10pm in Sydney, it is 9pm in Brisbane and 7pm in Perth. A Western Australian taxpayer hoping to lodge after dinner on Saturday could therefore run into disruption much earlier than expected. Check the time conversion before making a weekend plan, particularly if an accountant or family member is helping from another state.

The Deadline Is Closer Than It Looks

The ordinary published self-lodgment date for the 2025–26 income tax return is 31 October 2026. People using a registered tax agent may qualify for different dates under the agent lodgment program, but first-time clients should contact the agent before the October cut-off. Outstanding prior-year returns can also affect eligibility. Do not assume that hiring an agent automatically extends every deadline. Anyone uncertain about a weekend due-date concession should confirm their own position rather than relying on social media advice.

Make the Final Week Boring

Gather income details, donation records and work-expense evidence now. Confirm that myGov is linked to the ATO, test your login and allow time to correct pre-fill information. Lodging on a weekday before the final weekend provides room to recover from technical or documentation problems. The new $1,000 standard work-expense deduction belongs to the 2026–27 income year, not the 2025–26 return currently being lodged. Ordinary deduction rules still matter for this year's paperwork.

Risks to Watch Before You Submit

Published maintenance schedules can change, and some online functions may remain available while others fail. Save supporting records securely and retain a submission confirmation once the return is accepted. A successful login is not proof that a return has been lodged. Checking status after submission is the final step that turns a rushed October task into a completed obligation.

A Practical Detail Worth Checking

For households juggling shift work, childcare and other obligations, a small scheduling change can make a large difference. A return prepared in advance can be reviewed calmly, while one started during a service interruption may be left incomplete. Build in time to confirm bank details and correct errors before pressing submit.

General information only. This article is not personal taxation or financial advice.