Negative gearing + multi-property is the highest-complexity individual return
If your investment-property situation includes any of:
- Two or more rental properties
- A property that's negatively geared (deductions exceed rental income)
- An interest-only loan with offset / redraw history
- Properties in multiple states
- A spouse co-owner
…then your tax return sits at the high-complexity end of what myTax can handle. A Registered Tax Agent typically pays for themselves several times over in correctly applied deductions, audit-risk reduction, and time saved.
This guide breaks down the specific complexities that make multi-property and negatively geared returns the strongest candidates for agent-assisted lodgement.
Multi-property returns: the per-property arithmetic doubles
Every additional rental property adds an entire set of calculations:
| Per property | Items to track |
|---|---|
| Income | Rental income (gross), bond receipts, late payment fees, insurance recoveries |
| Loan | Interest expense, refinancing costs apportionment, mortgage protection insurance |
| Holdings costs | Rates, body corporate / strata, land tax (state-by-state), water, insurance |
| Operating costs | Repairs (vs capital), maintenance, gardening, cleaning, advertising for tenants |
| Capital | Capital works (Division 43) per acquired-from date, depreciating assets (Division 40), additions during year |
| Apportionment | Days available for rent, days actually rented, any personal use |
| Agent fees | Property manager commission, letting fees, ad hoc agent charges |
For 2 properties, that's twice the data. For 3+, the time cost of correct entry approaches "professional fee" levels purely on hours.
The myTax interface adds the complication of needing to separately complete each property's Schedule of Rental Property Income and Expenses. There's no shared calculation engine — you re-do similar work for each.
Negative gearing: the rules you can't get wrong
Negative gearing applies when deductible expenses (mostly interest) exceed rental income. The net loss offsets other assessable income — usually salary — reducing your overall tax.
The rules that catch DIY filers:
1. Interest must be "incurred in producing assessable income"
If your loan has been mixed (refinanced, redrawn, equity used for non-investment) at any point in its history, the interest claim must be traced and apportioned. You can't just claim "all the interest on the loan" — only the portion attributable to investment purposes.
Common scenario that catches people:
- 2018: Took out IO investment loan for $500k at 5% to buy rental property
- 2021: Refinanced + drew $50k for personal renovation on family home
- 2024: Loan balance still $550k; interest rate now 6%
You can only claim interest on the investment portion (~$500k of the $550k = 91% of interest). The personal-use $50k portion is not deductible.
myTax doesn't apply this trace for you.
2. Land tax allocation across states
State land tax thresholds, rates, and timing of liability differ by state. NSW alone has surcharges for foreign owners, plus the principal-place-of-residence exemption. WA, QLD, VIC each have their own structure. Land tax is generally deductible in the year of receipt of the assessment, but state-specific timing applies.
3. Body corporate special levies
Special levies for major works are partly Division 43 (capital works portion) and partly immediate-deduction (administrative portion). The strata statement usually doesn't break this down for you.
4. Spouse co-ownership
If a property is jointly owned, income and deductions split per ownership percentage. If only one spouse is on the loan, only that spouse claims interest. Getting this wrong commonly results in either underclaim or audit-triggering overclaim.
The negative-gearing trap: where DIY most often goes wrong
The single most common error: claiming interest on the wrong loan basis.
When the ATO (ATO guidelines) data-matches a refinanced loan, they can see:
- Original loan date and amount
- Refinance date and new amount
- Linked offset / redraw transactions
If your interest claim doesn't reconcile with the investment-only portion of the loan history, you'll receive a follow-up query.
The fix is contemporaneous loan-purpose documentation — most DIY filers don't maintain this. A Registered Tax Agent will either request it or, if missing, apply conservative apportionment that protects you.
Multi-property + negative gearing + EOFY timing
If you're negatively geared, you typically want all deductible expenses to fall in the financial year before 30 June to maximise the loss offsetting your salary.
Pre-30 June moves to consider:
- Prepay 12 months of interest (if your lender offers it — most do for IO investment loans)
- Pay outstanding rates / body corporate / property manager fees
- Bring forward any repairs / maintenance that need doing
- Pay the land tax assessment if received before 30 June
A Registered Tax Agent will walk through this with you in May/June before the year closes.
The actual fee calculus for multi-property owners
Traditional accountants charge AU$300–800+ for a multi-property return. a registered tax agent (see the directory)
a registered tax agent (see the directory) For 3+, it's the entry point — your assigned agent will let you know if your situation needs more than the standard scope.
When DIY in myTax actually works for negative-geared property
- Single negatively geared property
- Single loan, never refinanced or redrawn
- Single state (no land-tax-allocation complications)
- Sole ownership (no spouse split)
- No major capital works or depreciation events during the year
- Comfortable with the apportionment rules for any mixed personal use
If all six apply, DIY is workable in a few hours.
Need Help With Your Tax Return?
Still unsure whether you need a tax agent? a registered tax agent (see the directory) Check our full decision guide to see if a tax agent is right for your situation.
*Disclaimer: This is general information only and does not constitute personal tax advice. Consult a registered tax agent for advice tailored to your specific situation. Always verify against the latest ATO guidelines at ato.gov.au.*
The 6-point self-audit before deciding
3+ "yes" answers and Agent-assisted lodgement essentially pays for itself.
See the decision guide to compare across other complexity dimensions.
AI analysis on this page is general information only, not personal tax advice. Multi-property and negative-gearing situations benefit substantially from review by a Registered Tax Agent with property experience.