Spoiler: If you’ve got a rental property, the ATO is already looking at your numbers — and they’re not buying your “guess-timate” on repairs or “forgotten” weeks of personal use.

FY25 is the year rental property owners are in the firing line. Here’s what’s being flagged, what you can still claim, and where most people go wrong.

A professional tax consultant in a modern office is meeting with a smiling couple, discussing rental property tax return details. The desk has documents, a calculator, a laptop, and a coffee cup. In the background, a "Tax Return" sign and a calendar are visible, with large windows showing a bright cityscape.

1. The ATO Is Matching Data — Down to Your Mortgage  

Rental deductions are now one of the top targets for ATO data-matching programs.
They’re using:

  • Land title records
  • Bank mortgage data
  • Airbnb, Stayz, and real estate listings

Translation? If you overstate your interest, forget your capital works schedule, or “accidentally” claim a private expense, the system will catch it. Not maybe. Will.

2. Interest Deductions: Split Loans Are a Trap  

You can only deduct interest related to the income-producing portion of the loan. Refinanced your home and investment under the same umbrella? You need to apportion interest. Not doing so = 🚩 red flag.

Tip: Refinance planning must be done before tax time, not when you’re trying to explain it during an audit.

3. Repairs vs Improvements: The Old Game Is Over  

  • Replacing a broken hot water system = deductible
  • Upgrading to solar with battery storage = capital

ATO has updated guidance: if it improves the asset or changes its functionality, it’s not an immediate deduction. Yes, even if it costs you $6,000.

4. New Property? You Might Not Be Able to Claim Depreciation  

Bought brand-new or second-hand property after 9 May 2017?

  • You can’t claim depreciation on existing plant & equipment if it was previously used.
  • Only capital works (building structure) are claimable, typically at 2.5% per year.

Tip: Always ask for a depreciation schedule from a QS. If you don’t have one, you’re probably leaving money on the table (or worse — claiming the wrong thing).

5. Mixed-Use Properties: Holiday Homes Are a Hot ATO Target  

You can only claim deductions for the period the property was genuinely available for rent.

  • Blocked it out for 3 weeks at Christmas for “potential bookings”?
  • That’s private use. No deductions.

The ATO now uses online listing photos + calendar histories to prove it.

6. Rental Income Includes More Than Just Rent  

  • Bond money kept
  • Insurance payouts
  • Reimbursements from tenants
  • NBN co-access payments

If it hits your account due to the rental, it’s considered income.

What You Should Be Doing Now  

  • Keep a separate loan account for investment property
  • Log actual days rented vs private use
  • Keep every receipt (yes, even the Bunnings one)
  • Don’t claim improvements as repairs — check first
  • Get a depreciation report — especially if it’s your first year

Final Word  

Rental properties can be a powerful tax tool — but FY25 is not the year to “wing it” or recycle last year’s numbers. The ATO has too much data, too many algorithms, and a clear directive: audit the property owners who push the envelope.

If your property portfolio is giving you tax anxiety — or your spreadsheet has more colors than formulas — it’s time to check in.