Capital Gains Tax When Selling an Investment Property: 2026 Evidence Report

A current Australian report on CGT when selling an investment property, including contract timing, cost base, discounts, main residence rules, clearance certificates, future reform, and after-tax sale modelling.

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Tax · 24 June 2026 · 8 min read

Reviewed against source material on 24 June 2026.

Jurisdiction
Australia
Review date
24 June 2026
Document type
Evidence report, not advice
Source posture
Current checked sources only

Abstract

This report reviews capital gains tax when selling an investment property: 2026 evidence report for Australian property investors as at 24 June 2026. It uses ATO CGT rental-property guidance, ATO CGT calculation and cost-base guidance, ATO CGT discount guidance, ATO main-residence and foreign-resident pages, ATO clearance certificate guidance, the 2026-27 Budget tax-reform page, RBA cash-rate data, and ABS Lending Indicators.

As at 24 June 2026, the defensible sale workflow is to model current-law CGT before signing the contract, then run separate checks for cost-base records, ownership share, residency, clearance certificates, main residence claims, and the announced but not-yet-law 2027 reform.

Simple explanation

A sale model should not start with the loan balance. It should start with the contract date, sale proceeds, cost base, ownership share, discount rules, main residence facts, withholding, and tax cash timing.

Figures

Figure 1 RBA cash-rate target, selected decisions The selected RBA entries show why debt stress should be modelled directly in 2026.
3.6%3.7%3.8%3.9%4%4.1%4.2%4.3%Feb 2025May 2025Aug 2025Dec 2025Feb 2026Mar 2026May 2026Jun 2026
Selected RBA target cash-rate entries from February 2025 to June 2026. This is not a forecast.

RBA Cash Rate Target, checked 24 June 2026

Figure 2 ATO sale example: gain before and after discount The ATO rental-property example separates sale proceeds, cost base, gross gain, and discounted gain.

Karl and Louisa ATO example: $900,000 sale proceeds, $756,000 cost base, $144,000 gross capital gain, and $72,000 discounted capital gain before co-owner allocation.

Figure 3 ATO sale example: cost-base bridge The same ATO example shows why purchase costs, improvements, selling costs, capital works, and decline-in-value deductions must be reconciled.

Positive bars show amounts to trace. The model action says whether the amount is added, subtracted, or used as the final cost base.

Figure 4 CGT discount rates by owner type Discount access changes by tax profile, so the owner type must be set before the sale model is trusted.

ATO CGT discount guidance states 50% for eligible Australian resident individuals and trusts, 33.33% for complying super funds, and no CGT discount for companies.

Figure 5 Clearance certificate cash-flow example A missing clearance certificate can move cash to the ATO at settlement even for an Australian resident vendor.

ATO example: on a $650,000 sale, no certificates for two resident vendors means $97,500 is withheld, or $48,750 each.

Figure 6 Key CGT timing checks The sale model needs calendar checks because tax year, certificate timing, and record retention can differ from settlement cash flow.

Figures are rule-check reminders: 12 months for the basic discount test, up to 28 days for certificate processing, and at least 5 years for property records after disposal.

Figure 7 Future CGT reform rates to scenario-test The 2026 Budget and ATO new-legislation page make the 2027 reform a scenario, not current law.

Budget 2026-27 says the government intends to replace the 50% discount with inflation indexation and a 30% minimum tax rate for gains after 1 July 2027. The ATO says the measure is not yet law.

Figure 8 ABS dwelling lending, March Quarter 2026 The latest checked ABS lending release shows the scale of owner occupier and investor commitments.

Number of new loan commitments for dwellings in March Quarter 2026.

1. Scope and Method

This section explains the source base and the limits of the report.

This report is limited to Australian property, lending, tax, and retirement planning material checked on 24 June 2026. It states general decision rules only. It does not calculate a personal advice outcome.

Official and public sources are used for rule statements and current data. Reddit, forums, and search themes are used only to identify common questions. They are not used as proof of law, tax treatment, or market fact.

References: [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]

Evidence typeUse in this reportLimitRefs
Official guidanceATO CGT rental-property guidance, ATO CGT calculation and cost-base guidance, ATO CGT discount guidance, ATO main-residence and foreign-resident pages, ATO clearance certificate guidance, the 2026-27 Budget tax-reform page, RBA cash-rate data, and ABS Lending IndicatorsUsed for rule statements, definitions, and current settings.[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]
Market and statistical dataRBA, ABS, APRA, Services Australia, and state revenue pages are used where relevant.Used as current context, not as a forecast.[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]
Forum and search themesUsed to find common investor questions and confusing terms.Not used as factual authority.
Table 1. Evidence standard. The report separates verified source facts from question discovery and illustrative modelling.

2. Evidence Snapshot

As at 24 June 2026, the defensible sale workflow is to model current-law CGT before signing the contract, then run separate checks for cost-base records, ownership share, residency, clearance certificates, main residence claims, and the announced but not-yet-law 2027 reform.

The evidence is read conservatively. A claim is included only when it can be linked to a checked source or is clearly labelled as an illustrative modelling step.

References: [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]

TopicChecked positionModel actionRefs
Rental property sale is a CGT eventATO guidance states that selling or otherwise disposing of a rental property can create a capital gain or capital loss.Open a CGT file before listing the property and do not treat the gross sale price as the after-tax result.[1]
Gain starts with proceeds and cost baseATO guidance calculates the capital gain or loss by comparing capital proceeds with the property cost base or reduced cost base.Build the model from proceeds, cost base, reduced cost base, and ownership share before estimating tax.[1][2]
Net gain and net loss treatmentATO guidance says a net capital gain is generally included in tax, while a net capital loss is carried forward and used against later capital gains.Do not use a property capital loss as an ordinary salary or rent deduction in the sale model.[1][2]
Contract date sets the tax yearATO CGT guidance says the CGT event for a property sale is generally when the contract is entered into, not settlement.Set the income year from exchange date and run a special check for contracts signed close to 30 June.[1][6][2]
Settlement cash is not the tax dateATO examples show a sale contract before 30 June with settlement after 30 June can still belong in the earlier income year.Reserve tax cash using the contract year, even if the sale proceeds arrive in a later month.[1][2]
Co-owner allocationATO guidance allocates each co-owner capital gain or capital loss according to legal ownership interest, including tenants in common shares.Match the sale model to title ownership and do not split the gain based only on who paid expenses.[1]
Pre-CGT property is not a simple ignore ruleATO guidance says property acquired before 20 September 1985 is generally pre-CGT, but certain post-1985 capital improvements can still matter.Keep a separate improvement file for pre-CGT property and test whether later capital improvements have their own CGT treatment.[1][4]
Cost base has five elementsATO cost-base guidance lists five elements, including acquisition cost, incidental costs, certain ownership costs, capital improvement costs, and title-defence costs.Use the five-element structure instead of a loose folder of receipts.[3]
Common included sale costsATO rental-property CGT guidance includes examples such as legal fees, stamp duty, and real estate agent commissions as relevant cost-base items where the rules allow.Trace purchase settlement, duty, legal, marketing, agent, valuation, title-search, and sale settlement records.[1][3][4]
Deductible costs are excludedATO guidance states that the cost base does not include amounts already claimed or that could be claimed as a tax deduction.Reconcile tax returns and depreciation schedules before adding any holding or works costs to cost base.[1][3]
Capital works can reduce cost baseATO capital-works guidance says capital works deductions generally cannot be included in cost base or reduced cost base.Subtract capital works deductions claimed or claimable where the ATO rules require it.[5]
Decline-in-value deductions can matterATO rental-property examples reduce the cost base for decline-in-value deductions and capital works deductions before calculating the gain.Reconcile plant, equipment, and capital works schedules before giving the sale estimate to the owner.[1][5]
ATO worked example gives a benchmarkIn the ATO Karl and Louisa example, $900,000 sale proceeds and a $756,000 cost base produce a $144,000 gross capital gain and a $72,000 discounted gain.Use the example as a calculation pattern, then replace every number with the property-specific file.[1]
Market value can replace actual cashATO calculation guidance says market value can be used for capital proceeds when an asset is given away or sold below market value to a friend.Flag related-party sales, family transfers, and non-arm-length transactions for valuation review.[2]
Capital losses come before discountATO calculation guidance applies capital losses before the CGT discount when working out the net capital gain.Apply carried-forward and current-year capital losses before applying discount percentages.[2][6]
12-month discount test is strictATO CGT discount guidance requires ownership for at least 12 months and says to exclude both the acquisition day and the CGT event day.Test the exact dates before assuming the 50% discount applies.[6]
Discount depends on tax profileATO guidance states that eligible Australian resident individuals and trusts can access the 50% discount, complying super funds can access 33.33%, and companies cannot use the CGT discount.Run a separate sale model for individual, trust, company, and SMSF ownership where relevant.[6]
Foreign and temporary resident discount limitsATO CGT discount guidance states that foreign or temporary residents cannot claim the full 50% discount for gains after 8 May 2012 and may need an apportioned approach.Set tax residency periods before estimating the discount on any cross-border sale.[6]
Main residence exemption is fact-sensitiveATO main-residence guidance provides a general exemption for a main residence, but other ATO pages set limits when the home is rented, used for business, or sold by a foreign resident.Document occupation dates, rental dates, business use, and residency before claiming a full exemption.[7][8][9][12]
Former-home 6-year ruleATO guidance says a former home used to produce income can sometimes continue to be treated as the main residence for up to 6 years, subject to conditions and choices.Treat the 6-year rule as a calculation election, not as an automatic label on every former home.[8]
Only one main residence generally countsATO guidance says a taxpayer generally cannot treat another property as the main residence for the same period, except for limited moving-home overlap.Check whether another home was nominated or owned during the absence period.[8]
Part-home rental creates partial CGTATO guidance says renting out part of a home or using it for business can prevent a full main residence exemption and can require floor-area and time apportionment.Record rooms, floor area, dates, and income-producing use rather than relying on a full-exemption assumption.[9]
First income use can set market valueATO home-rental guidance says a market value at first income use can be needed when a home first starts producing income after 20 August 1996.Obtain or support a market valuation for the first income-producing date where the rule applies.[9][4]
Foreign resident main residence restrictionATO guidance says foreign residents generally cannot claim the main residence exemption for property sold after 30 June 2020 unless the life events test is satisfied.Confirm tax residency on the contract date before relying on a main residence exemption.[12]
Clearance certificate is now a settlement workflowATO guidance says Australian resident vendors need a valid clearance certificate at or before settlement, otherwise the purchaser must withhold from the sale proceeds.Apply for a certificate as soon as selling is being considered and track one certificate per vendor.[11][10]
Current withholding rateATO foreign-resident withholding guidance states that from 1 January 2025 a 15% rate applies to the value of all property.Stress test settlement cash assuming 15% is withheld if a certificate is missing or invalid.[10][11]
Certificate processing and validityATO guidance says clearance certificate processing can take up to 28 days and certificates are valid for 12 months if residency status does not change.Put the certificate application in the pre-listing checklist rather than the settlement checklist.[11]
Records are a tax assetATO property record guidance says buying, owning, and selling records should generally be kept for at least 5 years after the property is disposed of.Keep sale records in the property file after settlement instead of closing the file when cash arrives.[4]
2027 reform is not current lawThe ATO new-legislation page says the announced negative gearing and CGT reform is not yet law, while the Budget page says the CGT changes are intended from 1 July 2027.Model current law first and keep any 2027 reform result as a separate scenario until legislation is final.[13][14]
Reform would tax only future gainsBudget 2026-27 states the CGT reforms will only apply to gains arising after 1 July 2027, with new-build investors able to choose the 50% discount or the new arrangements.For post-2027 decisions, split the model into current-law gain, post-2027 gain, and new-build choice where relevant.[14][15]
Lending context remains materialABS March Quarter 2026 Lending Indicators reported 57,342 investor dwelling commitments and $41.5 billion in investor commitment value, excluding refinancing.Use current lending context as background only. Do not infer a property-specific sale price from aggregate lending data.[16]
Debt context remains materialRBA cash-rate data recorded a 4.35% target on 17 June 2026, making holding-cost sensitivity a live input for investor sale choices.Compare after-tax sale proceeds with the cash-flow cost of holding at the current debt setting.[17]
Table 2. Checked positions. Each row turns a source point into a modelling action.

4. Stress Tests

A useful report shows what can go wrong before it recommends a next step.

The stress tests below are deliberately simple. They are designed to stop a single attractive number, such as a low rate, tax deduction, or high rent estimate, from carrying the whole decision.

Stress testQuestion answeredConservative actionRefs
Exchange before 30 June, settlement after 30 JuneWould the owner accidentally place the gain in the earlier income year because contract date controls the CGT event?Run two tax-year cash-flow cases and ask the tax adviser to confirm timing before exchange.[1][2]
Asset held just under 12 monthsDoes excluding acquisition day and CGT event day fail the 12-month discount test?Run a no-discount scenario and compare against a delayed sale only if commercial terms allow.[6]
Company ownerWould a company owner lose the CGT discount entirely?Use a company-specific tax model and do not copy the individual-owner discount rate.[6]
Foreign resident on contract dateWould foreign-resident discount limits or the main residence restriction change the result?Set tax residency status for the CGT event date before using any exemption or discount.[6][12]
No clearance certificate by settlementWould 15% of the sale proceeds be withheld because the Australian resident vendor did not provide a valid certificate?Reserve settlement cash under the 15% withholding case until the certificate is confirmed.[11][10]
Missing purchase settlement fileWould the cost base be understated because purchase contract, duty, legal, and settlement statement records are missing?Reconstruct from conveyancer, state revenue, lender, bank, and archived tax records before relying on the estimate.[4][3]
Capital works not reconciledWould the model overstate cost base by including amounts claimed or claimable as capital works deductions?Cross-check depreciation and capital works schedules against every cost-base line.[5][1]
Wrong ownership splitWould the model split the gain 50:50 even though title or tenants-in-common shares differ?Use title ownership as the base allocation and attach title evidence to the report.[1]
Former home rented longer than 6 yearsWould the owner assume the full main residence exemption still applies after the income-producing absence cap is exceeded?Run a partial exemption calculation for the non-exempt period and keep the election decision explicit.[8]
Part of home rented outWould a room, granny flat, studio, or business area create a partial CGT exposure?Model floor area, days used, first-income-use value, and deductions claimed.[9]
Related-party sale below marketWould the ATO market-value rule replace the actual transfer price?Obtain valuation support before transfer and do not rely on the cash price alone.[2]
No tax cash reserveWould the owner spend the sale proceeds before the tax bill is assessed?Hold a tax reserve based on the conservative model until the return is lodged and assessed.[2]
Loss expected but gain arises after deductions are removedWould removing deductible capital works or decline-in-value amounts turn a low-gain estimate into a larger gain?Run the model both before and after required cost-base reductions and keep the after-reduction case as the base case.[1][5]
GST edge caseATO rental-property guidance notes GST is generally not payable on existing residential premises, but GST can apply to new residential premises or vacant land.Flag new residential premises, development stock, vacant land, and enterprise facts for tax-advice review.[1]
Future reform enacted before saleWould a sale after 1 July 2027 fall partly under enacted CGT reform if the announced measure becomes law?Keep a current-law model and a reform scenario until final legislation and ATO tools are available.[13][14][15]
Table 4. Stress-test checklist. Run these tests before relying on the base case.

5. Portfolio Workflow

The workflow keeps tax, debt, cash flow, and exit risk in the same file.

The same workflow should be repeated before acquisition, refinance, renovation, sale, or retirement planning. This keeps the report predictable across the full portfolio.

StepDo thisEvidence to keepRefs
Create the sale evidence fileStore purchase contract, purchase settlement, sale contract, sale settlement, duty, legal, agent, marketing, valuation, title, and loan payout records.Use one dated folder for each property and retain it after sale for the ATO record period.[4][3]
Set the CGT event dateUse contract date for most property sales and note settlement date separately for cash-flow timing.Label the income year before calculating discount, losses, and tax cash reserve.[1][2]
Confirm owner profileRecord individual, trust, company, SMSF, joint tenant, tenants-in-common, Australian resident, foreign resident, and temporary resident status.Use owner profile to set discount rate, exemption access, and withholding workflow.[6][1][12][11]
Build the five-element cost baseMap each cost to acquisition cost, incidental cost, ownership cost, improvement cost, or title-defence cost where the ATO rule allows.Reject vague labels such as other costs until they are matched to evidence and rule treatment.[3]
Reconcile deductionsCompare the cost base against tax returns, depreciation schedules, capital works claims, and rental expense claims.Remove costs that were claimed or could be claimed as deductions before calculating the base case.[1][5]
Calculate gross gain or lossSubtract the cost base or reduced cost base from capital proceeds, using market value where ATO rules require it.Create a simple proceeds minus cost-base line before applying losses, discounts, or exemptions.[2][3]
Apply losses and discounts in orderATO calculation guidance applies capital losses before discount and carries forward unused net capital losses.Show current-year gains, carried-forward losses, remaining gains, discount, and net capital gain as separate lines.[2][6]
Test main residence claimsCheck actual occupation, former-home absence, rental use, business use, foreign-resident rules, and any first-income-use valuation.Use a main-residence worksheet instead of a yes or no checkbox.[7][8][9][12]
Apply for clearance certificates earlyATO guidance says certificate processing can take up to 28 days and the purchaser withholds if a valid certificate is not provided by settlement.Track application date, certificate date, vendor name match, expiry date, and settlement delivery.[11]
Run current-law and future-law cases separatelyATO says the 2027 CGT reform measure is not yet law, while Budget 2026-27 describes the intended reform design.Label future-reform outputs as scenarios and do not mix them into the current-law tax estimate.[13][14][15]
Set the tax cash reserveThe net cash available after sale differs from gross price because debt payout, sale costs, tax, and possible withholding all happen on different clocks.Hold a conservative reserve before repaying private debt, gifting funds, or committing to a new purchase.[2][10][18]
Compare sell, hold, and refinanceRBA cash-rate data and ABS investor lending data describe current debt and market context but do not decide the individual outcome.Compare after-tax sale proceeds with hold cost, refinance capacity, rent evidence, vacancy risk, and replacement property costs.[17][16][18]
Adviser review before unconditional exchangeCGT, withholding, GST, residency, main-residence, and reform timing can all change the after-tax answer.Ask the tax adviser to review the file before the contract becomes unconditional where practical.[1][2][11][12]
Table 5. Practical workflow. The rows are written as actions so the report can be turned into a model checklist.

6. Limits and Claim Map

The report supports analysis, not personal financial, tax, legal, or credit advice.

The safest reading is cautious. Use this report to structure questions, identify missing evidence, and prepare adviser conversations. Do not treat it as an approval, forecast, valuation, or tax ruling.

References: [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]

ClaimEvidence usedStatusRefs
CGT should be modelled before contract signing.ATO guidance links CGT timing to contract date and uses proceeds, cost base, losses, and discounts to calculate the result.Supported. The page treats pre-contract modelling as the core workflow.[1][2][6]
A sale price is not the same as investable cash.ATO CGT and clearance-certificate guidance show that tax and withholding can affect sale cash flow, while Moneysmart frames property investing as a cost and risk decision.Supported as a cash-flow modelling claim, not as a forecast.[1][11][18]
The 50% CGT discount is conditional.ATO guidance sets ownership period, residency, and entity-type limits on discount access.Supported. The model must test dates, residency, and owner type.[6]
Capital works and depreciation records can change the result.ATO guidance excludes deductible amounts from cost base and shows examples where capital works and decline-in-value deductions reduce the cost base.Supported. Deduction reconciliation is mandatory before relying on the estimate.[1][5]
A former home is not automatically CGT-free forever.ATO former-home guidance sets a 6-year income-producing absence rule, election choices, and limits where another main residence is involved.Supported. The exemption needs an occupation and rental timeline.[8]
Part-home rental and business use can create partial CGT.ATO guidance says renting out part of a home or using it for business can reduce the main residence exemption and require apportionment.Supported. Room, floor-area, business-use, and date records are needed.[9]
Foreign resident status can remove expected exemptions.ATO guidance restricts main residence exemption access for foreign residents and limits full CGT discount access for gains after 8 May 2012.Supported. Residency must be checked at the CGT event date.[12][6]
Clearance certificates are now ordinary seller hygiene.ATO guidance says from 1 January 2025 the 15% withholding rate applies to the value of all property, and resident vendors need valid clearance certificates to avoid withholding.Supported. Certificate tracking belongs in the pre-listing workflow.[10][11]
The 2027 CGT reform should not be treated as current law.The ATO says the announced reform is not yet law, while Budget 2026-27 describes a future intended start from 1 July 2027.Supported. Keep reform outputs as labelled scenarios.[13][14]
Aggregate market data does not prove an individual sale outcome.ABS lending data and RBA cash-rate data provide current context only.Supported. Use aggregate data for context and property-specific evidence for recommendations.[16][17]
Table 6. Claim and evidence map. Major claims are mapped to evidence so weak claims stay visible.

References

  1. [1] ATO: Capital gains tax when selling your rental property Checked 24 June 2026
  2. [2] ATO: How to calculate your CGT Checked 24 June 2026
  3. [3] ATO: Cost base of assets Checked 24 June 2026
  4. [4] ATO: Keeping records for property Checked 24 June 2026
  5. [5] ATO: Cost base adjustments for capital works Checked 24 June 2026
  6. [6] ATO: CGT discount Checked 24 June 2026
  7. [7] ATO: Your main residence - home Checked 24 June 2026
  8. [8] ATO: Treating your former home as your main residence Checked 24 June 2026
  9. [9] ATO: Using your home for rental or business Checked 24 June 2026
  10. [10] ATO: Foreign resident capital gains withholding overview Checked 24 June 2026
  11. [11] ATO: Australian residents and clearance certificates Checked 24 June 2026
  12. [12] ATO: Main residence exemption for foreign residents Checked 24 June 2026
  13. [13] ATO: Reforming negative gearing and capital gains tax Checked 24 June 2026
  14. [14] Australian Government Budget 2026-27: Tax reform Checked 24 June 2026
  15. [15] Australian Government Budget 2026-27: Negative gearing and CGT explainer Checked 24 June 2026
  16. [16] ABS: Lending Indicators, March Quarter 2026 Checked 24 June 2026
  17. [17] RBA: Cash Rate Target Checked 24 June 2026
  18. [18] Moneysmart: Buying an investment property Checked 24 June 2026

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