Sydney property is expensive enough without paying tax you never needed to pay. Yet that is exactly what happens when property owners are classified the wrong way, hold property in the wrong structure, or miss deductions that were sitting in plain sight. A generalist accountant who sees two rental schedules a year will not catch these issues. A property accountant who lives in them every week will.

At Trinity Accounting Practice in Beverly Hills, we have acted for Sydney property investors, developers and renovators since 2003. This guide explains the tax questions that decide most property outcomes — your classification, your structure, your depreciation, your CGT timing and your GST position — and why getting them wrong is so expensive in a city where the median house price runs well past $1.4 million.

Investor, developer or trader — the classification that drives everything

The ATO does not tax all property owners the same way. Before any other planning, your accountant should establish which of three categories you fall into, because the tax consequences are completely different:

Investor — you hold property to earn rent and long-term growth. Gains are on capital account, which generally means access to the 50% CGT discount (a concession that halves the taxable gain on assets held over 12 months by individuals and trusts). Rental losses may be negatively geared against other income.
Developer — you acquire land or property to improve and sell at a profit as a business or profit-making undertaking. Profits are ordinary income — no CGT discount — and the sales are generally subject to GST.
Trader / renovator-flipper — you buy, renovate and sell repeatedly. Like a developer, your profits may be ordinary income, taxed at marginal rates with no discount.

The classification is not a box you tick — the ATO looks at your intention at purchase, the scale and repetition of activity, your financing, and how businesslike the operation is. We regularly see Sydney owners assume they are “investors” entitled to the 50% discount when the facts say otherwise. The reverse mistake — a genuine investor paying GST and full income tax on a one-off subdivision that may have been on capital account — costs just as much. The ATO’s guidance on property development, building and renovating is the starting point, but the grey zone in the middle is where a property accountant earns their fee.

Negative gearing and depreciation — the deductions most owners under-claim

Negative gearing, done properly

Negative gearing simply means your rental property’s deductible costs (interest, rates, insurance, agent fees, repairs, depreciation) exceed the rent, and the loss reduces your other taxable income. It is legitimate and common — but it only works if every deductible dollar is captured and the loan structure is clean. Common Sydney mistakes we fix:

Redrawing on an investment loan for private purposes, contaminating the interest deduction.
Claiming initial repairs (fixing defects that existed at purchase) as immediate deductions when they are generally capital.
Missing borrowing costs, which are deductible over five years.
Forgetting that travel to inspect residential rental property has not been deductible for individual investors since 2017.

Depreciation schedules — the deduction you have to order

A quantity surveyor’s depreciation schedule (a one-off report, typically $600–$800) itemises the capital works deduction — generally 2.5% per year of eligible construction cost — plus plant and equipment items. On a newer Sydney apartment, first-year deductions of $8,000–$12,000 are common. Note the 2017 rule change: for second-hand residential property bought after 9 May 2017, you generally cannot depreciate previously used plant and equipment — but the capital works deduction on the building itself is usually still available and is usually the bigger number. Many investors heard “depreciation is gone” and stopped ordering schedules. That is leaving money on the table every single year.

CGT planning — where timing is worth real money

Capital gains tax is rarely about the rate; it is about timing and eligibility. The levers a property accountant works with:

The contract date rule. CGT is triggered on the date of contract exchange, not settlement. Exchanging on 28 June instead of 2 July moves the entire gain into a different financial year — and potentially a very different marginal-rate outcome.
The 50% discount. Held 12 months or more, individuals and trusts may halve the taxable gain. Companies get no discount — one reason companies are often the wrong vehicle for passive property.
Main residence exemption and the six-year rule. A former home that becomes a rental may remain CGT-exempt for up to six years if you do not treat another property as your main residence. Choosing which property carries the exemption is a calculation, not a guess.
Cost base reconstruction. Stamp duty, legal fees, capital improvements, and holding costs on vacant land can all build the cost base. Owners who kept poor records routinely overpay CGT on Sydney properties held for 15–20 years.
Contribution strategies. A deductible super contribution in the year of sale (within the $30,000 concessional cap for 2025–26, rising to $32,500 from 1 July 2026) may shave the marginal rate applied to the gain.

GST on property — new residential premises and the margin scheme

GST is where developers and accidental developers get hurt. The key rules:

Sales of new residential premises (broadly, premises not previously sold as residential or created through substantial renovation) are taxable supplies. One-eleventh of the sale price may be payable as GST.
The margin scheme can reduce GST to one-eleventh of the margin — the difference between the sale price and the acquisition cost (or an approved valuation) — rather than the full price. But it must be agreed in writing with the purchaser at or before settlement, and it is only available if the property was acquired in an eligible way. Miss the paperwork and the concession may be gone.
Since 2018, purchasers of new residential premises generally withhold the GST at settlement and pay it directly to the ATO (GST at settlement) — so the cash never even passes through the developer’s hands.
Existing residential rent and sales of established homes are input-taxed — no GST charged, but no GST credits on related costs either.

On a $2 million duplex project, the difference between full GST and the margin scheme can easily exceed $80,000. That is a paperwork decision, made early, or not at all.

Ownership structures — trust, company, SMSF or your own name?

There is no single best structure — anyone who tells you otherwise is selling something. The genuine trade-offs:

Individual names — simplest, full CGT discount, negative gearing offsets salary. But no asset protection and no flexibility once the title is set.
Discretionary (family) trust — flexible distribution of income and capital gains among family members, good asset protection. But losses are trapped inside the trust (negative gearing does not flow out), and NSW land tax applies with no tax-free threshold for most discretionary trusts — a real annual cost on Sydney land values.
Company — flat 25–30% rate and asset protection, but no 50% CGT discount and profits are taxed again on extraction. Generally suited to development/trading stock, not long-term holds.
SMSF — concessional 15% tax on rent (0% in pension phase) and potentially 10% effective CGT. Borrowing requires a limited recourse borrowing arrangement, you cannot live in the property, and contribution caps limit how fast you can build deposit capital. Powerful for the right client; wrong for many.

Structure must be decided before the contract is signed. Moving a Sydney property between entities later triggers stamp duty and CGT — typically a six-figure cost on today’s values.

Worked example — the Hurstville duplex decision

A Hurstville couple owned a corner block bought in 2009 for $720,000. In 2025 they knocked down and built a duplex, intending to sell both sides for around $1.55 million each. Their assumptions: 50% CGT discount on the whole gain, no GST. Both assumptions were wrong — the duplex build was a profit-making undertaking on that part of the project, meaning ordinary income treatment and GST on the sales as new residential premises.

What proper planning achieved before contracts were exchanged: the margin scheme was elected in both sale contracts, calculated using an approved valuation of the land at the time the project commenced, cutting the combined GST from roughly $282,000 (one-eleventh of $3.1 million) to approximately $98,000 on the margin. The pre-development capital growth from 2009 was identified and supported as remaining on capital account with the 50% discount available, rather than the entire profit being taxed as ordinary income. Combined difference versus the do-nothing path: over $230,000. The planning work took three meetings and a valuation. None of it was available after settlement.

A Trinity insight from 22 years in practice

The most expensive sentence in property tax is “we’ll sort the tax out after we sell.” Almost every major property tax lever — structure, margin scheme election, classification evidence, main residence choice, contract-date timing — must be pulled before exchange, and several before purchase. In 22 years we have rarely seen a property tax disaster that came from a hard rule; they almost all come from decisions made by default. Our rule for clients: ring us before the agent, before the broker, and definitely before you sign.

What this means for you

If you own a rental and have never ordered a depreciation schedule: you are likely under-claiming thousands per year, even on second-hand property.
If you are planning a subdivision, knock-down-rebuild or flip: get your investor-versus-developer classification and GST position assessed before you start, not at tax time.
If you are about to buy in a trust, company or SMSF: model land tax, negative gearing and CGT discount outcomes first — each structure wins in some scenarios and loses badly in others.
If you moved out of your home and now rent it out: the six-year rule may protect the gain, but only if the exemption is managed deliberately.
If you are selling near 30 June: remember CGT runs off the contract date — a few days may change the tax year of the whole gain.
If your investment loan has a redraw you used personally: have the interest apportionment reviewed before the ATO does it for you.

How Trinity can help

Trinity Accounting Practice provides property-specialist accounting for Sydney investors, developers and renovators — classification advice, structure setup and review, depreciation and negative gearing optimisation, CGT planning, margin scheme elections and GST-at-settlement compliance, all run on Xero. Through our related mortgage broking arm, Nexus Wealth Partners, we can also coordinate loan structuring so the finance and the tax position pull in the same direction. We are based at 159 Stoney Creek Road, Beverly Hills, and work with property clients across Sydney.

Book a property tax chat with the Trinity team →

General advice only. This article contains general information current as at June 2026 and does not constitute tax, financial or legal advice. It does not take into account your personal circumstances, objectives or needs. Before acting on any information in this article, you should consider its appropriateness to your situation and seek professional advice from Trinity Accounting Practice or another qualified adviser. Liability limited by a scheme approved under Professional Standards Legislation.