In Australia, the pre-CGT date is 20 September 1985. Assets acquired before that date are generally exempt from CGT on later disposal, but the exemption depends on reliable records and can unravel through later improvements, inheritance, or ownership changes.
A Sydney homeowner in 2026 may be holding a property bought by a parent in the early 1980s and assume the sale is automatically tax-free. That assumption can be expensive. The original asset may qualify as pre-CGT, while a beneficiary, company, trust, or later-built structure faces a different calculation.
The practical question is not “When was the property sold?” It is “Who acquired which asset, on what date, and what changed afterwards?”
What the Pre CGT Date Actually Means
If your parent bought a house before 20 September 1985, the asset generally remained pre-CGT while your parent owned it. A later sale by your parent would ordinarily disregard the capital gain or loss. However, inheritance rules can give you a new acquisition date and a new cost base, so you shouldn’t treat “pre-CGT” as a permanent family exemption.
Australia introduced its general CGT regime in 1985 for assets acquired from 20 September 1985 onward. Assets acquired before that date are commonly called pre-CGT assets. The legislation applies the distinction through the capital gains tax rules in the Income Tax Assessment Act 1997, including the provisions that disregard gains and losses from certain pre-CGT assets. The ATO’s overview of CGT assets and exemptions is the right starting point for checking the asset category and exemption treatment.
The three points where the rule changes
The original acquisition date matters, but it isn’t the whole file. I would check these three points before telling a client that a sale is tax-free:
- Ownership transfer: An inheritance, gift, company transfer or trust arrangement may change the relevant acquisition date or tax treatment.
- Post-1985 improvements: A substantial extension, new structure or addition can create a taxable component even where the land and original building remain pre-CGT.
- Evidence: A verbal family history isn’t enough. You need contracts, settlement material, title records or other reliable evidence establishing the acquisition date.
Practical rule: Treat pre-CGT status as an asset-tracing conclusion, not a label you attach to an entire property forever.
A plain-English overview such as your essential guide to CGT can help property owners understand the wider sale process. For a focused explanation of the pre-1985 property issue, see EndureGo’s pre-1985 property CGT exemption guide.
Why the 1985 Boundary Exists
Before 1985, Australia had no broad-based tax on capital gains. That created a familiar tax-planning problem. A person could receive value from an appreciating asset rather than ordinary income, or hold an asset and defer the tax consequences indefinitely.
Treasury describes the 1985 reform as an attempt to broaden the income-tax base, improve equity, reduce opportunities to convert ordinary income into capital gains and reduce investment distortions. The policy wasn’t a random administrative cut-off. It was a deliberate change to the way Australia taxed wealth created through asset growth, as explained in Treasury’s history of Australia’s tax system.
The original system was not identical to today’s system
The original CGT regime used indexation from 1985 to 1999. Broadly, indexation adjusted the asset’s cost for inflation, meaning the tax calculation aimed to capture an inflation-adjusted gain rather than taxing the full nominal increase. That history still matters when an older post-CGT asset has a complicated cost-base record.
For example, an investment acquired after the boundary may have passed through different CGT calculation methods over its ownership period. A tax agent needs the acquisition date, expenditure history, ownership changes, and disposal contract before choosing the correct method. You can’t safely calculate an older gain from the purchase price and sale price alone.
Why the rule built up gradually
Pre-CGT assets didn’t all disappear from the system at once. Assets entered the post-CGT framework as owners sold, transferred or otherwise dealt with them. Treasury’s historical material describes this as a gradual build-up as pre-1985 assets were progressively sold or brought into the later framework.
That explains why older properties still create difficult files for Australian accounting firms. A 1984 purchase can sit beside a 2000 extension, a later transfer to a company and an eventual sale by an estate. The date remains important, but the surrounding transactions determine how much of the outcome is exempt.
How to Prove an Asset Is Pre CGT
The strongest pre-CGT position starts with a clean evidence trail. If I were reviewing your file before a sale, I wouldn’t begin with the expected gain. I’d begin by asking you to prove the acquisition date independently from the family story.
Build the evidence file in layers
Start with the document that identifies the legal purchase:
- Original contract: The contract of sale can establish that the taxpayer acquired the asset before the pre-CGT date.
- Settlement statement: Conveyancer or solicitor records can support the completion date and identify the buyer.
- Title documents: A Torrens title register or historical title search can show ownership and later transfers.
- Accounting records: Contemporaneous ledgers, fixed-asset registers and financial statements can corroborate the asset’s treatment.
- Probate material: A will, probate file and estate papers can connect the deceased owner to the beneficiary.
- Share records: Broker statements, share registry records and dividend documentation can help establish when pre-CGT shares entered the portfolio.
- Valuation reports: A valuation can support the market value where the original records are missing, or the law requires a value at a particular date.
Don’t simply leave the sale off the return
A pre-CGT disposal still needs correct tax-return treatment. The ATO expects taxpayers to report the disposal using the appropriate pre-CGT classification rather than pretending the transaction never happened. That creates a clear audit trail and prevents an omission from looking like undeclared income.
If the records are thin, reconstruct the history before exchange. Search conveyancer archives, request historical title information, review old accounts and obtain a valuation where appropriate. A valuation doesn’t magically prove ownership, but it can support the market-value evidence needed for the calculation.
Evidence beats confidence. If the acquisition date matters, keep the document that proves it with the tax working papers.
Your asset schedule should separate the original asset from later expenditure. Record the date, nature and cost of each improvement, every ownership change, any rollover history and the eventual sale contract. That schedule gives your tax agent something defensible to work with instead of a broad conclusion based on memory.
A Property Example With Post 1985 Improvements
Consider an Adelaide small-business owner who bought commercial premises in 1984 for $250,000. In 2000, the owner added a substantial warehouse extension costing $180,000. The owner sells the whole property in 2026 for $1.4 million.
The original land and structure may retain pre-CGT treatment. The warehouse extension does not automatically receive the same protection merely because it sits on old land. The post-1985 improvement can require a separate CGT calculation based on its cost and its properly apportioned share of the sale proceeds.
Separate the components before calculating anything
The sale price belongs to the whole property, so you need an objective allocation. A quantity surveyor’s report, building records, construction invoices, approvals, and a defensible valuation can support the split. Don’t choose an allocation because it produces the most favourable answer.
| Component | Acquisition Date | Cost Base | Share of Sale | CGT Treatment |
|---|---|---|---|---|
| Original land and structure | 1984 | $250,000 | Allocated value of original asset | Generally pre-CGT and disregarded |
| Warehouse extension | 2000 | $180,000 | Allocated value of improvement | Post-CGT calculation required |
The taxable component isn’t just the full $1.4 million sale price less the original purchase cost. The schedule needs to identify the warehouse’s allocated sale proceeds, deduct its relevant cost-base items, and apply the correct CGT rules. The original asset remains a separate part of the analysis.
What I would request from the client
I would ask for the 1984 contract, settlement papers, title history, construction contract, invoices, building approvals, finance documents, depreciation schedules and any valuation or quantity surveyor report. I would also check whether later works changed the character of the asset or created additional improvements.
The ATO expects improvement costs and valuations to be objectively supportable. A major extension is not the same as repairing damaged gutters. A new warehouse, separate dwelling or substantial commercial structure deserves careful apportionment.
Don’t sign the sale contract first and investigate the extension later. The contract date can affect the tax year and the amount you need to report.
Owners planning work on older properties can also use practical period home renovation advice when assessing the scope of later improvements. From a tax perspective, keep the invoices and approvals from the beginning. Good project records are much easier to obtain before the builder, surveyor and conveyancer have closed the file.
The Inheritance Trap Most People Miss
A pre-CGT asset does not remain automatically exempt when it passes through a deceased estate. The deceased may have owned the property as a pre-CGT asset, but the beneficiary is generally treated as acquiring it at the deceased’s date of death, with the first element of the cost base generally based on the market value at that date.
Take a parent who bought a property in 1982, then died when the property was worth $900,000. The beneficiary later sells it for $1.1 million. The relevant starting point for the beneficiary’s gain calculation is generally the $900,000 date-of-death market value, not the parent’s historical purchase price and not zero.
That result changes the conversation completely. The parent’s ownership period may remain outside CGT, while the beneficiary calculates the later movement in value under the inheritance rules.
The estate file needs more than the will
Preserve these documents together:
- Will and probate documents: Establish the estate administration and the transfer pathway.
- Date-of-death valuation: Supports the beneficiary’s starting market value.
- Improvement invoices: Identify work completed after the inheritance or work that affects the asset calculation.
- Rental and use records: Show whether the property generated income or became a main residence.
- Sale contract: Establishes the disposal terms and relevant transaction details.
A date-of-death valuation should be defensible. If the estate didn’t obtain one at the time, arrange an independent retrospective valuation where appropriate and retain the valuer’s reasoning.
The ATO also recognises that a major improvement made on or after 20 September 1985 may be incorporated into a single asset valued at death rather than treated as a completely separate asset in every case. That is why an inherited property needs a proper review of its type, use, improvements and disposal circumstances.
Sydney and Adelaide families often discover the problem when the executor has already distributed records or a buyer has issued a sale deadline. Use EndureGo’s guide to CGT on inherited property as a practical starting point, then obtain advice before signing.
How Pre CGT Stacks Against the Main Residence Exemption
The pre-CGT exemption and the main-residence exemption are different rules. A taxpayer who owns an old family home may qualify under the first rule, while another owner relies on the second and receives only a partial exemption because the property was rented or used in a business.
Compare the calculations, not just the labels
For a post-20 September 1985 dwelling, suppose the total capital gain is $200,000, the property was not the owner’s main residence for 1,000 days, and total ownership lasted 4,000 days. The partial-exemption calculation produces an assessable amount of $50,000 before other adjustments, using the ATO’s formula of total gain multiplied by non-main-residence days divided by total ownership days. See the ATO’s guidance on moving to a new main residence for the relevant home-use rules.
| Rule | Typical result | Main risk |
|---|---|---|
| Pre-CGT treatment | Gain or loss from the qualifying original asset is generally disregarded | Later improvements, transfers or inherited ownership |
| Main-residence exemption | Full or partial exemption based on actual use | Rental periods, business use and changes of residence |
A pre-CGT dwelling generally avoids that partial calculation because the qualifying original asset produces no CGT gain. That doesn’t automatically protect a later extension or a beneficiary’s post-death ownership period.
The six-month overlap rule can also matter when an owner moves to a new home. The ATO says both homes can generally qualify only for the final six months before the old home is disposed of, where the old home takes longer to sell. Keep move-in dates, rental periods, business-use records and sale costs.
For practical property-sale context, sale tax guidance from Edinhart Realty can help explain the broader issues. For the specific main-residence rules, review EndureGo’s main-residence CGT guidance alongside your ownership timeline.
Common Pre CGT Questions From Australian Taxpayers
Are shares bought before 1985 still pre-CGT if they remain in a broker account?
Generally, the original shares can retain their pre-CGT character if you can prove the acquisition date and haven’t changed the holding in a way that creates a new asset or acquisition. A current broker statement alone may not establish the original date.
Action: Request historical share registry, broker and dividend records before selling.
What happens if a pre-CGT asset moves into a company or trust?
A transfer can create a new CGT issue even when the asset was originally pre-CGT. The company or trust may not receive the same treatment as the original individual owner, and the transfer can involve market-value, rollover, and distribution consequences.
Action: Get advice before transferring the title, not after the restructure.
Does a pre-CGT small business automatically qualify for the small business 15-year exemption?
No. The small business 15-year exemption has its own eligibility conditions, including rules about ownership, active assets, and the relevant individual circumstances. Pre-CGT treatment and the small business concession aren’t interchangeable labels.
Action: Test the concession requirements separately and retain ownership and business-use evidence.
Must I report a pre-CGT disposal to the ATO?
Yes, the disposal should generally appear in the relevant tax return using the appropriate pre-CGT treatment rather than being omitted. The reporting position should match the asset schedule and supporting evidence.
Action: Give your tax agent the contract, settlement documents and pre-CGT classification before lodgment.
Does a gift preserve the pre-CGT status?
Don’t assume it does. A gift can involve a change in ownership and specific market-value or rollover rules, depending on the parties and asset. The recipient’s treatment may differ from the original owner’s.
Action: Obtain a written tax analysis before signing a transfer or deed.
Get Your Pre CGT Position Checked Before You Sign
Guessing the pre-CGT date can cost money at settlement and create an ATO issue. I would arrange a fixed-fee CGT review before exchanging contracts for an old property involving post-1985 works, an estate, company or trust.
EndureGo Tax’s team in Ashfield, Belrose and Adelaide can reconstruct acquisition evidence, assess later improvements, model inheritance or ownership changes, and prepare the CGT schedule. The firm provides CPA-qualified, registered tax-agent support for individuals and small businesses. Call 1800 841 312 or book through endurego.com.au.
Before signing, collect the contract, title history, improvement invoices, and estate papers. Confirm where the exemption holds and where later works or transfers change the result.
EndureGo Tax offers fixed-fee CGT reviews. Call 1800 841 312 or book online to have the documents and schedule checked before you commit to the sale terms.
