October 31 tax return deadline: What property investors need to know

Dad helping daughter to complete tax return

First published 22 September 2025

For property investors across Australia, the end of the financial year is always a busy period. Along with reviewing rental income and expenses, one of the most important tasks is lodging your annual tax return. If you’re planning to lodge your return yourself, October 31, is the date you need to circle on your calendar.

Failing to meet this deadline can lead to penalties, interest charges, and unnecessary stress. But getting your return in on time, and making sure you claim everything you’re entitled to, can put real money back in your pocket. For property investors, that often means taking full advantage of depreciation deductions – a benefit that many overlook.

In this article, we’ll walk you through the lodgment rules, what happens if you’re late, how depreciation works for investment properties, and why working with experts like BMT can help you maximise your return.

Why October 31 matters

The ATO sets October 31 each year as the final date for self-lodged tax returns. This deadline applies whether you use the ATO’s online platform, MyTax, or complete the return manually.

For many, the process is relatively straightforward. But for investors, things can quickly become complicated. You’ll need to gather rental statements, records of property-related expenses, and details of any major changes such as renovations or the purchase of a new investment.

The October deadline helps the ATO process millions of returns efficiently, but it also ensures that individuals meet their obligations in a timely manner. If you’re not ready by this date, there is an alternative: engaging a registered tax agent.

The benefits of using a tax agent

While the October 31 deadline is firm for self-lodgers, tax agents operate under a special lodgment program. This can extend your deadline until as late as May or June of the following year. The catch? You must be registered with a tax agent before the end of October.

For busy investors, this extra time can make a significant difference. It gives you breathing room to organise documents, gather receipts, and ensure you’re not rushing the process. More importantly, a tax agent can help ensure accuracy - reducing the risk of errors or missed deductions that could cost you thousands.

What happens if you lodge late?

The consequences of missing the October 31 deadline depend on whether you’re due a refund or you owe money to the ATO.

  • If you’re owed a refund: The good news is that the ATO doesn’t typically issue penalties if your return is late. The downside is obvious-you simply wait longer to receive your money.
  • If you owe tax: The ATO may apply a Failure to Lodge on Time (FTL) penalty. This is generally calculated in 28-day blocks at around $330 per period overdue, up to a maximum of around $1,650. On top of this, interest is charged on the outstanding amount.

Even small delays can add up quickly. For investors juggling mortgages, repairs, and other costs, paying more than necessary is the last thing you want.

Depreciation: A powerful tool for investors

While deadlines and penalties are critical to understand, the real opportunity for property investors lies in depreciation. Put simply, depreciation is a tax deduction for the natural wear and tear of your investment property and its assets. It’s one of the largest deductions available, and it doesn’t require any out-of-pocket expense to claim.

There are two main types of depreciation deductions:

  • Division 43 - Capital works
    This covers the structural elements of the building, such as walls, roofs, and concrete. These can typically be claimed at 2.5% per year over 40 years.
  • Division 40 - Plant and equipment
    This includes removable assets such as carpets, blinds, appliances, and hot water systems. Each item has its own effective life as set by the ATO, which determines how much you can claim each year.

The risks of DIY depreciation

Many investors who lodge their own returns underestimate or miscalculate depreciation. Common mistakes include:

  • Claiming incorrect rates based on outdated ATO guidelines.
  • Failing to include certain eligible assets.
  • Overlooking deductions from renovations completed by previous owners.

These errors can reduce your refund or create issues in the event of an ATO audit. The safest and most effective approach is to obtain a professionally prepared tax depreciation schedule.

The BMT advantage

BMT Tax Depreciation is one of Australia’s leading providers of depreciation schedules, and for good reason. As qualified quantity surveyors – one of the few professions recognised by the ATO to estimate construction costs for depreciation purposes - BMT ensures compliance and accuracy.

  • Proven results: On average, BMT clients receive more than $12,000 in deductions in their first year alone on residential investment properties.
  • Audit-ready documentation: BMT schedules provide detailed, itemised reports that stand up under ATO scrutiny.
  • Maximised claims: By identifying every eligible deduction with a thorough site inspection, BMT ensures you claim the full amount you’re entitled to.

For investors, this can mean the difference between a modest refund and a significant boost to your cash flow.

Case study: The investor who claimed an extra $16,500 with BMT

Investor profile

  • Name: Taylor
  • Property type: Brand new two-bedroom unit in Brisbane, QLD
  • Purchase price: $750,000
  • Annual rental income: $35,100

The situation

Taylor, bought a brand-new two-bedroom unit in Brisbane for $750,000.

On paper, the property’s annual rent was $35,100, while annual expenses added up to $48,300. This left a pre-tax shortfall of $13,200, or $254 per week.

Without claiming depreciation, Taylor’s tax refund covered only part of this shortfall, leaving her out of pocket $160 per week.

What changed

After engaging BMT to prepare a tax depreciation schedule, Taylor was able to claim an additional $16,500 in depreciation deductions. This boosted her refund to $10,990 and reduced the effective cost of holding the property to just $43 per week.

The difference?

More than $6,100 back in her pocket each year.

New unit purchased for $750,000 Without depreciation With depreciation
Pre-tax cash flow
Annual income $35,100 $35,100
Annual expenses $48,300 $48,300
Total loss (before depreciation) $13,200 $13,200
Depreciation claim $16,500
Total loss (tax deduction) $29,700
Post-tax cash flow
Tax refund (loss x 37% tax rate) $4,884 $10,990
Net cost to own property $8,316 /year
$160 /week		 $2,210 /year
$43 /week

Stories like Taylor’s are common - and they highlight why professional support is so valuable.

How to stay ahead of the deadline

To avoid last-minute stress, investors should:

  • Mark October 31 in the calendar as the non-negotiable deadline for self-lodged returns.
  • Engage a tax agent early-before the end of October-to access extended lodgment dates.
  • Gather all documents early, including rental income statements, loan interest details, and expense receipts.
  • Order a tax depreciation schedule for any investment property to ensure you’re claiming every eligible deduction.

By planning ahead, you’ll not only avoid penalties but also maximise your return.

The bottom line

The October 31 tax return deadline is more than just a date - it’s an opportunity for property investors to take control of their finances. Whether you choose to self-lodge or engage a tax agent, the key is preparation.

For most investors, depreciation represents the single largest tax deduction available. Without a professional schedule, you risk leaving thousands of dollars unclaimed each year.

At BMT, we’ve helped thousands of investors unlock the full potential of their properties with tailored depreciation schedules that are accurate, compliant, and audit-ready.

Don’t leave it until the last minute. Call BMT on 1300 728 726 or Request a Quote today to ensure you’re ready well before October 31.

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