The Fine Print Australia · PUBLISHED 27 JUN 2026 · VERIFIED 27 JUN 2026 · AU EDITION

9 in 10 Wrong: ATO Rental Property Deductions Landlords Botch 🇦🇺

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An ATO random audit program found that 9 in 10 individual tax returns with rental property income contained errors, with incorrect deductions alone costing the budget an estimated $1.5 billion in lost revenue every year that the ATO is now aggressively clawing back via audits and adjusted assessments.

The number that matters

90% — proportion of rental property returns with mistakes (ATO random enquiry program, 2020–21). In its latest rental property guidance, the ATO states that nine out of ten returns reporting rental income required adjustment, mostly because landlords over-claimed deductions or failed to declare all income, triggering a multi‑year compliance crackdown with data‑matching across banks, Airbnb‑style platforms and land titles.

How it quietly costs you

Problem: Landlords claiming full-year deductions for interest, rates, insurance and other costs when the property is not genuinely available for rent, is used by family/friends at mates’ rates, or is a holiday home/leisure facility.

Mechanism

• The ATO’s 2025 Rental Properties guide says you must apportion expenses to reflect:
• only the period the property was genuinely available for rent at market rates, and
• only the portion of the property used to produce income.
• If you use the property for private purposes (your own holidays, friends or family staying free or at discounted rent), you cannot claim deductions for those periods.
• For holiday homes and short‑term rentals, new guidance TR 2025/D1 and the leisure facility rules in section 26‑50 ITAA 1997 go further: if the property is mainly held for your own holidays or recreation, the ATO can deny key holding costs like interest, council rates and insurance altogether.
• The ATO now treats many “holiday homes” as leisure facilities, meaning deductions are only allowed if the property is used or held mainly to produce assessable rental income (for example, genuinely available and let at commercial rates for most of the year).

Quantified impact

Concrete example of a typical mistake:

• Assume an investment property with:
• Interest on loan: $25,000 per year.
• Council rates, water, insurance, body corporate, management: $10,000 per year in total.
• Total annual expenses claimed: $35,000.
• The landlord:
• Rents it at market rates via a platform for 30 weeks per year.
• Uses it personally or lets family stay free/cheap for 22 weeks.
• Still claims the full $35,000 as a deduction.

What the ATO says should happen:

• You must apportion expenses based on weeks genuinely available for rent.
• In this example: 30 rental weeks ÷ 52 total weeks ≈ 58%.
• Only 58% of $35,000 = $20,300 is deductible.
• Over‑claim = $14,700 in excess deductions each year.

At a marginal tax rate of 37% (plus 2% Medicare) for a typical mid‑to‑high‑income landlord:

• Tax underpaid on the $14,700 over‑claim ≈ 39% × $14,700 ≈ $5,733 for that year.
• If the behaviour has gone on for 4 income years and the ATO amends all of them (which it can, especially for careless or reckless claims):
• Extra tax bill ≈ $5,733 × 4 = $22,932.
• Plus interest on the shortfall, which the ATO routinely charges on amended assessments (interest rates are adjusted quarterly and have recently been around 8–10% p.a. on unpaid tax).

Old vs better practice

• “Old” (wrong) behaviour many landlords follow:
• Listing the property only in peak periods.
• Letting family use it at low or no rent.
• Claiming 100% of annual holding costs regardless of private use.
• “Better” (ATO‑compliant) behaviour:
• Genuinely advertising all year at market rates (or clearly restricting to a defined commercial season).
• Keeping a booking calendar and documentation of rent and vacancy.
• Apportioning expenses based on weeks available/let at market rates and denying private‑use weeks.

For a typical holiday‑home landlord with $35,000 in annual costs, the difference between “old” and “better” behaviour can be around $5,000–$6,000 of tax per year once the incorrect deductions are stripped out.

The second, compounding trap

Problem: Misclassifying repairs vs improvements, and claiming non‑deductible items like purchase costs, initial renovations, or residential travel as immediate deductions.

Mechanism

The ATO draws hard lines in multiple areas:

1. Repairs vs capital improvements

• You can deduct repairs and maintenance that restore the property to its original condition (e.g. fixing a leaking roof, replacing broken fence palings).
• You cannot claim an immediate deduction for:
• Improvements that make the property better than before (e.g. full kitchen or bathroom upgrade, adding a deck or extension).
• Initial repairs/renovations done to fix defects that existed when you bought the property; these are capital and form part of cost base or depreciable capital works.
• Capital works are generally written off at 2.5% per year over 40 years under Division 43, not immediately (rate given in ATO rental properties guide).

2. Travel to residential rental properties

• Since 1 July 2017, individuals cannot claim any deductions for travel expenses (flights, car, accommodation) relating to inspecting, maintaining or collecting rent for a residential rental property, unless they are in the business of property letting or an excluded entity.

3. Non‑deductible acquisition and holding costs

• Purchase price, stamp duty on purchase, legal fees, buyer’s agent fees, and renovations immediately after purchase are all capital – they go into cost base and are not deductible when incurred.

Quantified impact

Example: landlord upgrades and misclaims.

• Alex buys a rental unit and:
• Spends $40,000 on a kitchen and bathroom upgrade before first tenant moves in (improvement and initial renovation).
• Spends $2,000 on flights, car hire and accommodation to inspect the property from interstate across the year.
• Alex incorrectly claims the full $42,000 as repairs and travel deductions in Year 1.

What should happen:

• The $2,000 travel for a residential rental is completely non‑deductible for an individual.
• The $40,000 renovation is a capital improvement; it must be treated as capital works. At a 2.5% rate:
• Correct annual deduction = 2.5% × $40,000 = $1,000.
• Correct total deduction in Year 1 is $1,000, not $42,000.

Over‑claim:

• Excess deductions in Year 1 = $42,000 – $1,000 = $41,000.

If Alex is on the 37% + 2% Medicare marginal rate:

• Tax underpaid = 39% × $41,000 ≈ $15,990 for that year.

Long‑run cost:

• Over the 40‑year life of the capital works:
• Total allowable deduction will still be $40,000 (at $1,000 per year).
• But claiming the full amount as an immediate deduction is not allowed, and when the ATO amends:
• Alex loses the timing advantage (no big upfront deduction).
• Faces a back‑tax bill (~$16,000) plus interest and possibly penalties.
• If Alex made similar mistakes across two properties or multiple renovation cycles, the cumulative corrections can easily exceed $30,000–$40,000 in extra tax and charges over a decade.

What this looks like in practice

Persona: Name: Sarah Age: 42 Job: Marketing manager Income: $130,000 salary (puts her in the 37% marginal tax bracket plus 2% Medicare). Property portfolio:

• Owns 1 coastal holiday unit (residential) worth about $850,000, with a loan balance of $650,000 at ~6% interest (≈ $39,000 interest per year).
• Rents it mostly on short‑stay platforms.
• Uses it herself and for family/friends roughly 8 weeks per year.
• Has held it for 7 years, with 23 years until her intended retirement at 65.

She has been doing her own tax return through myGov and claiming all expenses as if the property were fully income‑producing.

Discovery 1 — Private use and “mates’ rates” slash deductible expenses

• Using the property for 8 weeks of personal/family holidays means those weeks cannot generate deductions, and all annual expenses must be apportioned.
• If the property is genuinely available and let at market rates for 34 weeks per year, then:
• Deductible share = 34 ÷ 52 ≈ 65%.
• Sarah’s typical annual expenses:
• Interest: $39,000.
• Rates, water, insurance, strata, management, cleaning, etc.: $11,000.
• Total: $50,000.
• Correct deduction = 65% × $50,000 = $32,500.
• Sarah has been claiming the full $50,000, so she has over‑claimed $17,500 per year.

Tax effect at her 39% effective rate:

• Extra tax she should have paid = 39% × $17,500 ≈ $6,825 per year.

Over 4 years before the ATO audit window closes:

• Underpaid tax ≈ $6,825 × 4 = $27,300, plus interest.

Discovery 2 — “Repairs” she claimed were actually capital improvements

• Two years ago, Sarah:
• Replaced the original 1980s kitchen and bathroom with a modern fit‑out, costing $55,000.
• She claimed the full $55,000 as a repairs deduction in that year.
• Under ATO rules, a full upgrade is an improvement, not a repair, and should be claimed as capital works at 2.5% per year.
• Correct annual deduction = 2.5% × $55,000 = $1,375.

Over‑claim in the renovation year:

• Excess deduction = $55,000 – $1,375 = $53,625.
• Extra tax she avoided that year = 39% × $53,625 ≈ $20,914.

If the ATO reviews that year and adjusts it:

• Sarah faces an additional tax bill of around $21,000 plus interest and penalties just for misclassifying the renovation.

Discovery 3 — Her travel “inspection trips” are completely non‑deductible

• Sarah flies from Melbourne to the coastal town twice a year to “inspect” the property, costing:
• Flights and car hire: $1,200 per trip.
• Accommodation and meals: $800 per trip.
• Total per trip: $2,000.
• She claims both trips, $4,000 per year, as rental property travel deductions.
• ATO rules since 1 July 2017 say no travel deductions are allowed for individuals in relation to residential rental properties (unless in business or an excluded entity).

Impact:

• Over 7 years, she has claimed:
• $4,000 × 7 = $28,000 in non‑deductible travel.
• Tax underpaid = 39% × $28,000 ≈ $10,920.

Compared to what she believed:

• She thought she was “saving tax” by “using the property and inspecting it at the same time”.
• In reality, those travel deductions are zero, and now represent almost $11,000 in potential back‑taxes, plus interest, once the ATO disallows them.

The full cost of doing nothing

Using Sarah’s numbers and assuming the ATO reviews the last 4 years (common audit window unless there is fraud or evasion):

1. Private use over‑claims (apportionment issue)

• Over‑claimed deductions: $17,500 per year × 4 = $70,000.
• Extra tax payable: 39% × $70,000 ≈ $27,300.

2. Capital improvement misclassified as repairs

• If the $55,000 renovation happened 3 years ago, within the audit period:
• Correct deduction over 3 years = $1,375 × 3 = $4,125.
• Amount she claimed = $55,000 (in year of renovation).
• Over‑claimed deductions within period ≈ $55,000 – $4,125 = $50,875.
• Extra tax payable: 39% × $50,875 ≈ $19,842.

3. Travel deductions disallowed

• Within 4‑year window: $4,000 × 4 = $16,000 of non‑deductible travel claimed.
• Extra tax payable: 39% × $16,000 ≈ $6,240.

Headline combined figure (4 years, excluding interest/penalties)

• Total excess deductions = $70,000 + $50,875 + $16,000 = $136,875.
• Additional tax when ATO amends = 39% × $136,875 ≈ $53,381.

If the ATO also charges shortfall interest at, say, ~9% p.a. on average over 2–3 years on the older liabilities, Sarah could easily face $5,000–$8,000 of interest, pushing the total hit to around $60,000 in one shock — wiping out several years of her after‑tax rental profit.

Over her remaining 23 working years, if she had continued misclaiming at roughly $17,500 (apportionment) + $4,000 (travel) = $21,500 of invalid deductions per year, the long‑run “illusory benefit” is:

• 39% × $21,500 ≈ $8,385 per year.
• Over 23 years (ignoring discounting and any additional capital works errors), the lifetime correction risk is $8,385 × 23 ≈ $192,855, showing how costly it is to leave these patterns unchecked.

What to do about it

Move 1 — Audit your rental calendar and apportion correctly

1. Action: Reconstruct your last 12 months of rental use and private use.
2. Tool/portal:

• ATO Rental Properties Guide 2025 (Rental expenses and apportionment sections) and your myGov/ATO Online pre‑fill for rental income.

3. Steps:
4. Log into myGov > ATO Online > Tax > Lodgments > Income tax and open your latest lodged return or current year draft to see the rental schedule and number of weeks rented.
5. From booking platform statements, agent statements, and your calendar, list:

• Weeks property was rented at market rates.
• Weeks it was available but unused.
• Weeks it was used by you/family/friends for free or at discount.

3. Apply the ATO apportionment rules in the Rental Properties guide to re‑calculate:

• Percentage of the year the property was genuinely available/used to earn income.
• Revised deductible share for each annual expense type (interest, rates, insurance, etc.).

4. What “good” looks like:

• Your number of weeks rented/available in the return matches your booking records.
• You can clearly show that private‑use weeks have been stripped out of your deductions.
• Your total deduction is lower but defensible — and matches the ATO examples in the guide for similar private‑use scenarios.

Move 2 — Separate repairs from capital works using ATO’s rules

1. Action: Re‑classify every “repair” over the last few years into repair vs improvement vs initial repair.
2. Tool/portal:

• ATO Rental Properties Guide 2025 (sections “Repairs, maintenance and improvements” and “Capital works”) and the Capital allowance and depreciation tool accessed through myGov tax return.

3. Steps:
4. Gather invoices/quotes for all works over the last 5 years: maintenance, renovations, appliances, etc.
5. For each item, use the ATO guide’s definitions and examples to determine:

• Is it restoring original condition (repair/maintenance, deductible now)?
• Does it improve or change character (capital improvement – capital works at 2.5%)?
• Was it fixing a defect that existed at purchase (initial repair – capital, not deductible immediately)?[3

Sources

• https://www.ato.gov.au/individuals-and-families/investments-and-assets/property-and-land/residential-rental-properties/rental-expenses
• https://www.ato.gov.au/forms-and-instructions/rental-properties-2025

Researched 2026-06-27.

Corrections & disclosure: an AI-assisted, human-reviewed guide. Every figure is dated and sourced above. Spot something out of date or wrong? Tell us and we’ll correct it — corrections are noted here and in the video description.