Accounting & tax — CGT
Capital Gains Tax Accountant
Capital gains tax for Australian investors and business owners — calculating gains and losses on property, shares and other assets, the cost base, the CGT discount, main-residence and other exemptions, and record-keeping, prepared by Rohan Manokaran, Chartered Accountant and registered tax agent (TPB 25523469). General information only.
- Property CGT
- Share CGT
- Cost base
- CGT discount
- Main residence
- Capital losses
Eternity Group Accountants is a registered tax agent (TPB 25523469). Information on this page is general in nature and does not constitute personal tax advice. Before acting, consider whether the information is appropriate to your circumstances and seek advice from a qualified tax professional.CGT rules on this page reflect enacted law as at 13 July 2026, including the Treasury Laws Amendment (Tax Reform No. 1) Act 2026 changes that apply to CGT events on or after 1 July 2027. Last verified: 13 July 2026.
How the calculation fits together
What does a CGT calculation reconcile?
A capital gains calculation pulls several figures together — the proceeds, the cost base built from records, the holding period, any discount or exemption, and the year's gains and losses — so the amount reported in the return is supported rather than estimated.
Because these figures rarely sit in one place, a CGT calculation is mostly about building the cost base from records and confirming the dates — not applying a single formula.
The inputs
- Capital proceeds on the disposal — usually the sale price, or market value in some cases
- The cost base — acquisition cost plus eligible incidental and ownership costs
- The date of the CGT event, which drives the holding period and, from 1 July 2027, which discount or indexation rules apply
- Whether a CGT discount or cost-base indexation may apply, and at what rate for the type of owner
- Any main-residence or other exemption that may reduce the gain
- Capital gains and capital losses made elsewhere in the same year
- Capital losses carried forward from earlier years
- Capital-works deductions claimed, which can reduce the cost base
- The entity that owns the asset, and the return the gain is reported in
Scope of work
What's covered in a CGT calculation.
A documented, defensible capital gains position — the gain or loss worked out, the cost base supported by records, the discount and any exemptions considered, and the result reported in the return. General information only, with the position depending on your circumstances.
Calculating the gain or loss
Proceeds less cost base
As a general matter, the starting point is the capital proceeds on disposal less the cost base of the asset. We work out whether the transaction produces a gross gain or a capital loss, and reconcile the figures back to the contracts and settlement statements. The outcome depends on the records and timing, so we document the calculation rather than applying a default figure.
Cost base elements & the records needed
Acquisition · incidental · ownership costs
The cost base is more than the purchase price. Depending on the rules, it can include certain incidental costs of acquiring and disposing of the asset and some ownership costs. We identify which elements apply in your case and confirm the supporting records, because an under-documented cost base generally weakens the position if it is ever reviewed.
The CGT discount, indexation & holding period
Ownership · timing — general
Where an eligible asset has been held for the required period, a CGT discount may reduce the taxable portion of the gain. Whether it applies, and at what level, depends on how long the asset was owned, the type of owner and when the CGT event happens. For CGT events before 1 July 2027 the 50% discount continues for eligible resident individuals and non-superannuation trusts. For CGT events on or after 1 July 2027 the discount percentage for those owners on ordinary assets becomes 0% under the Treasury Laws Amendment (Tax Reform No. 1) Act 2026, and cost-base indexation may apply instead, subject to conditions. We confirm the holding period and the CGT event date and document the position rather than assuming a discount is available.
Exemptions & concessions awareness
Main residence · others — general
Some assets and circumstances attract an exemption or concession — the main-residence exemption is the most common, and others can apply depending on the facts. We flag where an exemption or concession may be relevant and assess it against the rules, but whether it applies in full, in part or not at all always depends on your circumstances.
What to gather
Documents usually needed for CGT advice.
The cost base is only as strong as the records behind it. Having these ready up front keeps the calculation accurate and the fixed fee tight — not every item applies to every asset.
Records checklist
- The purchase contract and the sale contract
- Settlement statements for both the purchase and the sale
- Records of capital improvements and major works
- Depreciation and capital-works schedules, if the asset was rented
- Dates of ownership, and any periods the property was your home
- Rental or private-use periods over the ownership period
- Loan statements and borrowing-cost records
- Legal, agent and accounting costs on buying and selling
- For shares — buy and sell contract notes for each parcel
- Prior-year returns showing any carried-forward capital losses
Send through whatever you already have — we will confirm which records apply to your asset and request anything still outstanding. Property investors: our CGT records checklist sets out exactly what to keep and for how long.
Suited to
Who we prepare CGT for.
Investors selling property
Owners disposing of an investment property, a holiday home or a former home that was rented for part of the period. We build the cost base from the purchase, capital improvements and selling costs, and consider any main-residence and other questions that arise on the facts.
Rental property taxShare & managed-fund investors
Investors disposing of listed shares, exchange-traded funds or managed-fund units, often across multiple parcels bought at different times. We track each parcel, work out the gain or loss on disposal, and consider the holding period for any discount that applies.
Business owners on a sale or restructure
Owners selling a business, business assets or shares, or restructuring an entity. Small business CGT concessions may be relevant where the conditions are met — this is general in nature and depends entirely on the facts, so we assess eligibility rather than assuming it.
Inherited & deceased-estate assets
Beneficiaries and executors dealing with assets passing through an estate, where special cost base and timing rules can apply. The treatment depends on the asset, the dates and the relevant rules, so we review the history before reaching a position. General in nature.
Worked example
Sale proceeds, cost base and the taxable gain.
A simple illustration of how the CGT discount can affect an eligible gain from a CGT event happening before 1 July 2027. The figures are general and for explanation only — eligibility and the result depend on your facts and the relevant rules.
The illustration: an asset sold for capital proceeds of $900,000, with a cost base of $650,000 built from the purchase price plus eligible incidental and ownership costs, produces a gross capital gain of $250,000. In this example an eligible individual or trust may apply the 50% CGT discount because the asset was held for more than 12 months and the CGT event happens before 1 July 2027, reducing the taxable gain from $250,000 to $125,000 — though for a trust, whether that benefit is ultimately kept can also depend on which beneficiary the gain is distributed to. That taxable gain is then generally added to assessable income and taxed at the owner’s marginal rate.
A company generally does not receive the 50% discount, so the same disposal would usually leave the full $250,000 as the assessable gain. Whether any discount or exemption applies depends on the owner, the holding period and the facts.
The illustration would not hold for a CGT event happening on or after 1 July 2027. Under the Treasury Laws Amendment (Tax Reform No. 1) Act 2026 — enacted law, with Royal Assent on 26 June 2026 — the discount percentage for a resident individual or a non-superannuation trust on an ordinary asset becomes 0% from that date, and cost-base indexation may apply instead, subject to the requirements of Division 114 including a twelve-month holding rule and residency requirements. Because an asset held on 30 June 2027 is treated as sold and reacquired at its market value just before 1 July 2027 — and only where it is later sold — indexation generally runs from 1 July 2027 rather than from the original purchase, and it may reduce a gain but cannot create or increase a capital loss. Complying superannuation entities keep their 33⅓% discount, and a company’s position is unchanged. For the full section-by-section analysis of who keeps a discount and how the replacement indexation works, see our resource on the CGT discount changes from 1 July 2027.
This is general information only and not personal tax advice. We have deliberately not published a worked calculation for a disposal on or after 1 July 2027: the transitional mechanics are involved and some supporting legislative instruments had not been made as at 13 July 2026. Eligibility for any discount, indexation or exemption depends on your circumstances and the relevant rules, which we review inside an engagement.
Illustration
- Sale proceeds
- $900,000
- Less cost base
- $650,000
- Gross capital gain
- $250,000
- Taxable gain after a 50% discountIf held over 12 months by an eligible individual or trust, for a CGT event before 1 July 2027
- $125,000
Illustration only — figures are general and not personal tax advice.
Process
From records to the reported gain — one clear sequence.
A document-driven engagement where you always know what is next, what the fixed fee covers and how the position is supported. CGT rarely sits on its own, so we coordinate it with the rest of your accounting work — see all our accounting services on the main Accounting page.
Gather the records
We collect the acquisition and disposal records — contracts, settlement statements, improvement costs and the dates that drive the holding period — so the cost base and proceeds are supported by documents before any calculation begins.
Calculate & apply the rules
We work out the cost base and the gain or loss, then consider the CGT discount and any exemptions that apply in your circumstances. This is general in nature and depends on the facts, so we document the reasoning rather than applying a fixed template.
Report & retain
The result is reported in the relevant tax return and the supporting records are organised and retained, so the position is defensible and the carry-forward of any capital loss is captured for future years.
Timing & risk areas
CGT timing and common risk areas.
A few points often catch people out on a capital gain. We review these against your records and the relevant rules — the notes below are general information, not advice on your situation.
Contract date vs settlement date
When the CGT event happens
For many asset sales the CGT event generally happens on the date of the contract, not the later settlement date. This can change which financial year the gain falls into, and it can also determine whether a disposal falls before or on or after 1 July 2027 — which now affects which CGT rules apply. The contract date is reviewed rather than assumed.
The 50% discount is not automatic
Owner type, holding period and the CGT event date
Do not assume the discount applies — it turns on the owner type and the 12-month holding period, and a company generally misses out entirely. It also turns on when the CGT event happens: for events on or after 1 July 2027 the discount percentage for resident individuals and non-superannuation trusts on ordinary assets becomes 0% under the Treasury Laws Amendment (Tax Reform No. 1) Act 2026, with cost-base indexation available instead subject to conditions. Complying superannuation entities keep their 33⅓% discount. For who keeps a discount and how the replacement indexation works, see the CGT discount changes from 1 July 2027.
Main residence exemption
May be full, partial or unavailable
The main-residence exemption may apply in full or only in part — for example where a home was rented for a period or used to produce income. The treatment depends on how the property was used over time and the relevant rules. If you rented out a former home, see the six-year absence rule explained.
Small business CGT concessions
Complex and eligibility-dependent
On a business sale, the small business CGT concessions may be available, but they are complex and depend on a series of conditions being met. We assess eligibility on the facts rather than assuming a concession applies.
Other matters — inherited assets, foreign-residency periods and the records supporting the cost base — may also need review depending on the asset. The CGT changes referred to on this page are enacted under the Treasury Laws Amendment (Tax Reform No. 1) Act 2026 (No. 49 of 2026, Royal Assent 26 June 2026). Schedule 1 commenced on 1 July 2026 and its substantive changes apply to CGT events happening on or after 1 July 2027. Some supporting legislative instruments had not been made when this page was last verified. Last verified: 13 July 2026.
Frequently asked questions
Capital gains tax — common questions.
Common questions
What is capital gains tax?
In general terms, capital gains tax is not a separate tax — it is the part of your income tax that applies when you dispose of a capital asset such as a property, a parcel of shares or another investment. A CGT event happens on disposal, and any net capital gain for the year is generally added to your assessable income and taxed at your marginal rate. Whether a particular transaction triggers CGT, and how much is assessable, depends on your circumstances, the timing, the cost base and the relevant rules, so we work it through case by case rather than applying a single formula.
How is a capital gain calculated?
As a general guide, a capital gain is the difference between the capital proceeds you receive on disposal and the cost base of the asset. The cost base is more than just the original purchase price — it can include certain incidental costs of buying and selling and some ownership costs, depending on the rules. If the proceeds exceed the cost base there is generally a gross gain; if the cost base exceeds the proceeds there is generally a capital loss. The precise figure depends on the records, the timing and how the asset was used, so the calculation is always specific to your situation.
What is the CGT discount?
Broadly, the CGT discount can reduce the taxable portion of an eligible gain where the asset has been held for at least the required period before the CGT event. The availability and size of any discount depends on how long you owned the asset, the type of owner — for example an individual, a trust or a company — and, following the Treasury Laws Amendment (Tax Reform No. 1) Act 2026, on when the CGT event happens. For CGT events before 1 July 2027 the 50% discount continues for eligible resident individuals and non-superannuation trusts. For CGT events on or after 1 July 2027 the discount percentage for those owners on ordinary assets becomes 0%, and cost-base indexation may apply instead, subject to conditions. Complying superannuation entities keep their 33⅓% discount, and a company never had the discount. We confirm what applies in your circumstances and document the holding period and the CGT event date rather than assuming a discount is available.
Has the CGT discount changed under the 2026 tax reform Act?
Yes, but on a future timetable. The Treasury Laws Amendment (Tax Reform No. 1) Act 2026 (No. 49 of 2026) received Royal Assent on 26 June 2026 and is law. Schedule 1 commenced on 1 July 2026, but its substantive changes apply to CGT events happening on or after 1 July 2027 — commencement and application are different things. For CGT events before 1 July 2027 nothing changes: the 50% discount continues for eligible resident individuals and non-superannuation trusts. For CGT events on or after that date, the discount percentage for those owners on ordinary assets becomes 0% and cost-base indexation may apply instead, subject to conditions including a twelve-month holding rule and residency requirements; complying superannuation entities keep their 33⅓% discount and a company's position is unchanged. The carve-outs, the indexation mechanics and what is still unsettled are covered in detail in our technical resource on the CGT discount changes from 1 July 2027. This is general information only, and the position for any asset depends on the facts.
Is my home exempt from capital gains tax?
In general, a main-residence exemption may apply to the home you live in, but it is not automatic and it depends on the facts. How the property has been used over time matters — for example whether it was ever rented out, used to produce income, or held on more than the area the rules allow — and partial exemptions can arise where the property was your home for only part of the period of ownership. Whether the exemption applies in full, in part, or not at all depends on your circumstances and the relevant rules, so we review the property history before reaching a position.
Can I use a capital loss to reduce my tax?
As a general rule, a capital loss can be offset against capital gains made in the same year, and any unused capital loss can generally be carried forward to offset capital gains in future years. Importantly, capital losses can generally only be applied against capital gains — not against your other income such as salary or business profit. Whether a loss is available, and how it interacts with gains and the discount, depends on your circumstances and the relevant rules, so we record the loss position each year rather than treating carry-forward as automatic.
Is capital gains tax based on the contract date or the settlement date?
As a general rule, for many asset disposals the CGT event happens on the date of the contract rather than the later settlement date. This matters because it can determine which financial year the capital gain falls into — a contract signed in June with settlement in July generally falls in the earlier year. The relevant date depends on the type of CGT event and the facts, so we confirm it from the contract rather than assuming settlement is the trigger.
Do companies receive the 50% CGT discount?
Generally no. The 50% CGT discount is broadly available to individuals and trusts for assets held at least 12 months, subject to the rules, but companies generally do not receive it — and a company's position on this point is unchanged by the Treasury Laws Amendment (Tax Reform No. 1) Act 2026, because a company never had the discount. What does change is the position for resident individuals and non-superannuation trusts: for CGT events happening on or after 1 July 2027 their discount percentage on ordinary assets becomes 0%, with cost-base indexation available instead subject to conditions. So the entity that owns an asset can affect the after-tax result on a sale, and the date of the CGT event now matters as well. Whether any discount applies in your case depends on the owner, the holding period, the CGT event date and the relevant rules, so we confirm the position rather than assuming it.
How do you price a capital gains tax calculation?
Fees depend on the asset and the complexity — a single share parcel with clean records is different from a property held for many years with improvements, periods of rental use and a main-residence question, or a business sale involving small business CGT concessions. We quote a fixed fee in writing, scoped to your situation, after a short scoping call. There is no standard dollar figure, because the work depends on the records, the timing, the cost base, the ownership and the relevant rules.
Related
Where this fits in the bigger picture
A capital gains calculation rarely sits in isolation. The asset that produced the gain, the return it is reported in, the entity that holds it and forward tax planning all connect — and the right treatment depends on your circumstances.
- Tax & Accounting
Crypto tax
Cryptocurrency is generally treated as a CGT asset by the ATO. We reconcile exchange and wallet data and report disposals. General information only.
- Tax & Accounting
Rental property tax
For investment properties, the annual rental schedule and the eventual disposal share the same cost base history, so they are best prepared with the CGT position in mind.
- Tax & Accounting
Individual tax return
Most personal capital gains are reported in the individual return, with the net gain carried through alongside your other income for the year.
- Tax & Accounting
Trust tax return
Where an asset is held through a trust, capital gains can sometimes be streamed to beneficiaries where the deed allows — a position considered as general guidance and assessed each year.
- Tax & Accounting
Tax planning & strategy
Forward-looking strategy around the timing of a disposal, the holding period and any concessions, considered as general guidance before a CGT event rather than after it.
- Property Investors
Accountant for property investors
For investors building a property portfolio, the cost base, structure and disposal planning are best coordinated with an accountant who works across the whole portfolio.