A first-year investor in Marrickville often discovers the problem at tax time. The rental statement shows rent received, loan payments, strata charges and other bills, yet the bank account tells a harsher story: the property has absorbed cash. The investor then asks the question that matters, “I've made a loss, but which part can I claim?”
Negative gearing sits between those two views. The cash position includes every payment leaving your account, while the Australian Taxation Office focuses on rental income less deductible expenses for the relevant income year. If deductible expenses exceed rental income, the property produces a net rental loss that may reduce taxable income from salary, wages or business income, subject to the applicable rules. A sound calculation therefore needs more than a rental statement. It needs accurate classifications, loan apportionment, depreciation evidence and an after-tax cash model.
Why the Numbers on Your Rental Statement Don't Tell the Whole Story
Consider a Marrickville unit bought by a first-time investor. The rental statement shows $28,400 in rent and $41,200 in costs, creating a $12,800 paper loss. The investor expects the loss to appear as a full tax refund, then realises the statement may include principal repayments, capital items or other costs that the ATO doesn't treat as immediate deductions.
That distinction creates the classic shock: the property lost money in the pocket, but the tax calculation produces a different result. A loan repayment contains interest and principal. Interest may be deductible when the borrowing funded the income-producing property, while principal reduces the loan balance and generally isn't deductible. A renovation may consume cash immediately, but the tax treatment may require a capital works or depreciation claim over time.
The ATO defines a property as negatively geared when its deductible expenses exceed rental income. The resulting net rental loss may generally be claimed against other income, such as salary, wages or business income, where the law permits. The calculation concerns the annual tax result, not whether the property is cash-flow positive after every cash expense. You can find a practical overview of how rental income is treated in EndureGo's rental income and tax guide.
Cash flow and tax position are different ledgers
A useful file keeps two columns:
- Cash costs, which show what the property consumed, including principal repayments and non-deductible capital payments.
- Tax deductions, which show only the expenses that qualify under the income tax rules for that year.
The Marrickville investor shouldn't ask only, “What was the total cost?” They should ask, “Which costs were deductible, for what period, and in what form?” That question prevents a common mistake, claiming the whole loss shown by an agent or property manager without checking the underlying invoices and loan statement.
Practical rule: A negative gearing calculation can reduce tax, but it doesn't turn a cash loss into a cash profit.
The next step is to rebuild the property from source documents. Start with gross rent, identify the deductible portion of each expense, separate interest from principal, then calculate the net rental result. Only after that should you estimate the tax effect and annual holding cost.
The Core Formula the ATO Actually Uses
The basic calculation is direct:
Gross rental income − total deductible rental expenses = net rental income or net rental loss
If the result is below zero, the property is negatively geared for that income year. The ATO's rental property guidance on deductible expenses emphasises that you must identify the allowable expense before comparing it with rental income.
Build the income side first
Include rent received during the income year, together with other assessable rental receipts that belong in the property schedule. Reconcile the amount to the property manager's annual statement and the bank account rather than relying on an estimate.
Then classify each expense. Common deductible categories can include:
- Advertising for tenants, where the advertising relates to securing or replacing a tenant.
- Body corporate fees, excluding capital components that require different treatment.
- Council and water rates, where the owner bears the cost.
- Insurance, including landlord cover.
- Interest on investment borrowings, limited to the income-producing use of the loan.
- Land tax, where deductible under the relevant circumstances.
- Pest and building inspections, when connected with managing the rental.
- Property management fees, including commissions and administration charges.
- Repairs and maintenance, where the work restores wear and tear rather than improving the property.
- Stationery and phone costs, apportioned where private use exists.
- Depreciation, including eligible plant and equipment and capital works deductions.
- Travel, only where the law permits the particular expense. Residential rental travel rules require care, so don't assume every inspection trip qualifies.
A repair that restores a damaged item can have a different treatment from an improvement or initial repair. The ATO explains that capital works deductions generally apply over time, commonly at 2.5% per year over 40 years, or 4% per year over 25 years in some cases, subject to the property and construction conditions described in its capital expenses guidance.
Remove items that don't belong in the immediate deduction
Exclude principal repayments, the purchase price, acquisition costs such as stamp duty and conveyancing, private-use portions and capital improvements from the immediate negative gearing expense total. Some excluded amounts may enter another tax calculation or become deductible over time, but they don't belong in the same-year expense column because they created a cash outflow.
For investors who want another explanation of property tax categories, the LendingXpress tax guide for investors can provide useful background. Use it alongside the ATO material, not instead of checking the specific facts of your property.
A Real Worked Calculation on a Sydney Unit
Take a $650,000 Inner West two-bedroom unit purchased on 1 July. The investor contributes a 20% deposit, borrows the remaining 80% at 6.25%, and holds the property for the full income year. The figures below create a complete rental schedule rather than a quick rent-minus-interest estimate.
| Deductible item | Annual amount |
|---|---|
| Gross rent | $30,200 |
| Body corporate fees | $3,100 |
| Council rates | $1,480 |
| Water rates | $760 |
| Landlord insurance | $1,250 |
| Property management at 7% | $2,114 |
| Repairs | $1,300 |
| Pest inspection | $220 |
| Depreciation schedule | $8,900 |
| Loan interest | $26,650 |
| Stationery and phone | $180 |
| Travel to inspect | $310 |
| Total deductible expenses | $46,264 |
The calculation is:
$30,200 rental income − $46,264 deductible expenses = $16,064 net rental loss
The depreciation schedule contributes a tax deduction without representing the same kind of current cash payment as interest, rates or insurance. That's why the investor must maintain both a tax schedule and a cash-flow schedule. The ATO's treatment of capital works and depreciating assets also means the schedule should come from reliable property records, not a rough estimate. For a related explanation of building deductions, see EndureGo's capital works deduction guide.
Compare the loss with the investor's tax position
A rental loss doesn't produce the same tax effect for every investor. The following comparison uses the supplied marginal-rate outcomes, including Medicare levy assumptions where stated.
| Marginal Rate | Taxable Income Band | Tax Offset on $16,064 Loss | Net Annual Cash Position After Offset |
|---|---|---|---|
| 19% | Applicable 19% band | $3,257 | $12,807 cost before other cash adjustments |
| 30% | Applicable 30% band | $5,142 | $10,922 cost before other cash adjustments |
| 37% | Applicable 37% band | $6,341 | $9,723 cost before other cash adjustments |
| 45% plus MLS | Applicable 45% band plus Medicare levy | $7,711 | $8,353 cost before other cash adjustments |
These amounts estimate the tax offset on the loss, not a guaranteed refund. The final result depends on taxable income, Medicare levy circumstances, other deductions, offsets, withholding and the taxpayer's complete return.
Investors comparing properties should also model yield, finance and ownership inputs together. A tool such as RealtyAPI.io's rental property calculator can help estimate rental property ROI, but a calculator output still needs tax review before you lodge.
From Net Rental Loss to After-Tax Holding Cost
The negative gearing result is only the tax layer. A serious investor calculates the amount the property still costs after the tax effect, then adds cash items that never entered the deduction.
Start with the pre-tax rental loss. Multiply that loss by the investor's relevant marginal tax rate, adjusted for the Medicare levy where applicable, to estimate the tax offset. Subtract the offset from the pre-tax loss to estimate the net after-tax cost of the deductible rental shortfall.
The supplied planning example uses a $9,250 rental loss and compares marginal rates of 32.5%, 37% and 45% plus Medicare levy. The precise tax benefit depends on the investor's circumstances, so the useful output is a scenario table rather than a universal refund promise.
| Marginal Rate | Pre-Tax Loss | Tax Offset | Net After-Tax Cost | Break-Even Growth |
|---|---|---|---|---|
| 32.5% | $9,250 | Scenario dependent | Loss less applicable offset | Scenario dependent |
| 37% | $9,250 | Scenario dependent | Loss less applicable offset | Scenario dependent |
| 45% plus MLS | $9,250 | Scenario dependent | Loss less applicable offset | Scenario dependent |
Add the cash costs that tax schedules omit
Layer in principal repayments, because they reduce the bank balance even though they don't normally reduce taxable income. Add strata special levies according to their tax character, cash depreciation items that required payment, and the opportunity cost of the deposit. Keep each item visible so you can distinguish a tax deduction from an economic cost.
A property can therefore remain negatively geared while requiring a substantial annual contribution. The tax offset reduces the burden. It rarely removes it.
The worked planning assumption indicates that the property needs 2.7% annual capital growth to hold the investor flat in pocket under that model. That figure belongs to that specific set of assumptions, not every property. Change the loan, vacancy, repairs, deposit, tax rate or non-deductible outflows and the break-even growth rate changes.
The number worth tracking is not the tax loss. It's the after-tax cash contribution required to keep the property.
Use the model before buying, not after the first tax return. Compare the after-tax holding cost with your cash reserves, loan serviceability and realistic view of rental income. Capital growth can't pay an invoice when the invoice falls due.
Mistakes That Can Sink Your Negative Gearing Claim
A clean-looking spreadsheet can still produce a weak claim. The ATO tests the connection between the expense and the income-producing purpose, the timing of the payment, the private-use portion and the evidence supporting the classification.
Audit the classification before adding the amount
Repairs versus improvements. Replacing a worn component to restore its former condition can differ from upgrading the property or correcting an issue that existed before the tenancy. The ATO's repairs, maintenance and capital expenditure material explains why capital items may need to be claimed over time rather than deducted immediately.
Mixed-purpose borrowing. Refinancing an investment loan and redrawing funds for private use creates an apportionment issue. You can't treat the entire interest bill as investment interest when the borrowing serves more than one purpose. Keep loan splits separate and retain the refinance documents.
Vacancy assumptions. Don't insert an attractive vacancy allowance that the rent ledger and bank statements can't support. Reconcile actual rent, periods available for rent and any private occupation.
Pre-purchase costs. Settlement and acquisition documents need careful treatment. A cost connected with buying the property isn't automatically a current rental deduction merely because the property later earns rent.
Depreciation evidence. A quantity surveyor's schedule supports the calculation, but you still need to check the asset history, ownership and remaining claim period. Don't keep copying an old figure without reviewing whether the relevant asset has reached the end of its effective claim period.
Check the reform date before making a purchase decision
The ATO's published reform proposal states that, from 1 July 2027, negative gearing would be limited to new residential builds, while existing properties held at the 7:30 pm AEST 12 May 2026 announcement time would be exempt. It also describes changes to the individual, trust and partnership CGT discount, including indexation and a 30% minimum tax rate on capital gains. Treat the timing and grandfathering conditions as a decision point, then verify the enacted rules before acting.
The biggest mistake is treating the tax benefit as the investment thesis. A property with weak rent, high ongoing costs and poor growth prospects can remain expensive after tax.
Records You Need to Keep for an ATO Review
A defensible negative gearing claim should read like an indexed client file. Start with the documents that prove ownership and borrowing purpose, then work down to the annual income and expense evidence.
Build five separate evidence buckets
Settlement and finance documents. Keep the settlement statement, contract, loan agreement and refinance papers. These documents establish when you acquired the property and how you used the borrowing.
Income reconciliation. Save rent ledgers, property manager statements and bank statements. Reconcile the gross amount reported in the return to the amounts received, including adjustments and retained amounts.
Expense support. Store invoices and receipts by category, such as rates, insurance, management, repairs, inspections and body corporate charges. Mark any private or mixed-use portion rather than forcing a full claim.
Depreciation and capital works. Retain the quantity surveyor's depreciation schedule, capital works calculations and supporting building information. Review changes after renovations, replacements or ownership events.
Borrowings and apportionment. Maintain a separate loan file for interest certificates, redraws, refinancing and split-loan calculations. A loan statement alone may not explain how the borrowing was used.
Retain the file for the required period
The general recordkeeping rule commonly requires records to be retained for five years, with the period connected to the relevant deduction year and the applicable tax legislation. Check the precise retention requirement for the document and transaction, particularly where capital gains, ownership changes or amended returns may extend the practical importance of older records.
A useful system names files by property, income year and category. Keep the source invoice beside the calculation that uses it, and record why you treated an item as a repair, capital works deduction or private expense.
EndureGo's Australian record-keeping guide outlines the broader discipline required for tax records. EndureGo Tax can also structure rental property files so the annual calculation can be rebuilt from source documents rather than reconstructed from memory at tax time.
FAQ and Your Next Step With EndureGo Tax
Can one spouse use the other spouse's rental loss?
The loss generally belongs to the legal owner or owners in their ownership proportions. One spouse can't transfer their rental loss to the other spouse because the other person has taxable income. Where the owner has insufficient income to absorb the loss, the treatment of any excess depends on the tax rules and the taxpayer's circumstances, so it should be carried forward and tracked rather than assumed to disappear.
Does the family home exemption apply when the investment property is sold?
The main residence exemption concerns the taxpayer's home and the specific ownership and use history of that property. A property held as a rental doesn't automatically receive the family home exemption because the owner also owns or lives in another dwelling. Moving between private occupation and rental use can create partial exemption and valuation issues, so calculate the CGT position from the ownership timeline and obtain advice before signing a sale contract.
What happens if the loan becomes fixed or is split?
Fixing the interest rate doesn't change the underlying purpose of the borrowing. The deductible interest still depends on the funds being used to produce rental income, while break costs, refinance expenses and loan splits require their own classification. If a lender divides the facility into fixed and variable portions, retain the facility documents and calculate each portion separately where the purposes differ.
How will the 2027 reform treat existing and new investors?
The ATO's reform material says the proposed changes would begin on 1 July 2027. It states that existing properties held at the 7:30 pm AEST 12 May 2026 announcement time would be exempt from the proposed negative gearing limit, while the limit would apply to new purchases of established residential property under the reform. New residential builds would retain the proposed negative gearing treatment. The final application depends on the enacted law and your contract, ownership and property facts, so don't rely on a headline or assume that a planned purchase qualifies for grandfathering.
A registered tax agent can check the ownership structure, reconcile the rental schedule, apportion the loan, review depreciation and lodge the return using evidence that supports each claim. That process matters most when the property includes mixed borrowing, capital works, private use, changing tenants or a planned refinance.
EndureGo Tax can calculate your rental property tax position, separate deductible expenses from cash-only costs and prepare the supporting schedules for a compliant return. Visit EndureGo Tax to arrange a review with its registered tax agent team in Inner West Sydney, the Northern Beaches or Adelaide, and bring your rent ledger, loan statements, receipts and depreciation schedule to the first appointment.
