What this result answers
Estimate an Australian individual capital gain, cost base, capital-loss offset, optional 50% discount and additional 2026-27 tax.
Australian Capital Gains Tax Calculator
Use the Australian Capital Gains Tax Calculator to estimate an Australian individual capital gain, cost base, capital-loss offset, optional 50% discount and additional 2026-27 tax.
Estimated additional tax
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Reference range
How this result is calculated
A clear calculation path based on your inputs.
Inputs usedReview the information used for this result.
Full calculation and sourcesCost base = purchase + eligible acquisition, disposal and capital costs; net gain = (sale - cost base - losses) × applicable discount; additional tax = liability with gain - liability without gain. Current Australian sources checked 2026-10-15.
Versioned calculationFormula v2026.27.4
Method used
Cost base = purchase + eligible acquisition, disposal and capital costs; net gain = (sale - cost base - losses) × applicable discount; additional tax = liability with gain - liability without gain.
Important boundary
Main-residence rules, pre-CGT assets, foreign-resident rules, indexation, small-business concessions and asset-specific cost-base adjustments are not inferred.
Enter Australian pay factsUse gross AUD amounts and the definitions beside each field.
Apply the dated methodCost base = purchase + eligible acquisition, disposal and capital costs; net gain = (sale - cost base - losses) × applicable discount; additional tax = liability with gain - liability without gain.
Audit the bridgeRead the result together with the components and tax-year label.
Check the boundaryMain-residence rules, pre-CGT assets, foreign-resident rules, indexation, small-business concessions and asset-specific cost-base adjustments are not inferred.
Interpretation
<strong>Period:</strong> 2026-27, effective 1 July 2026.
<strong>Method:</strong> Cost base = purchase + eligible acquisition, disposal and capital costs; net gain = (sale - cost base - losses) × applicable discount; additional tax = liability with gain - liability without gain.
<strong>Limit:</strong> Main-residence rules, pre-CGT assets, foreign-resident rules, indexation, small-business concessions and asset-specific cost-base adjustments are not inferred.
Use this result
Australian Tax Return CalculatorCompare entered PAYG withholding with a simplified 2026-27 Australian resident tax, Medicare and optional HELP liability to estimate a refund or amount payable.Australian Investment CalculatorProject investment growth from a starting amount and regular contributions with effective annual return and inflation assumptions kept visible.Australian Invest vs Offset CalculatorCompare an Australian mortgage-offset return with a simplified after-tax investment scenario including dividends, fees and an estimated discounted capital gain.
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Report a calculation issue Australian Capital Gains Tax Calculator: purpose and method
A dated Australian capital gains calculation with visible components, sources and limitations.
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Related calculators and resources
Australian Tax Return CalculatorCompare entered PAYG withholding with a simplified 2026-27 Australian resident tax, Medicare and optional HELP liability to estimate a refund or amount payable.Australian Investment CalculatorProject investment growth from a starting amount and regular contributions with effective annual return and inflation assumptions kept visible.Australian Invest vs Offset CalculatorCompare an Australian mortgage-offset return with a simplified after-tax investment scenario including dividends, fees and an estimated discounted capital gain.Australian Debt Recycling CalculatorModel an Australian debt-recycling scenario with converted principal, deductible interest, estimated marginal tax saving and investment growth shown separately.
Method and test recordFormula v2026.27.4
- Recorded scope
- Australian Capital Gains Tax Calculator formula, official-period mapping, deterministic reference fixture, edge behavior and JavaScript/PHP parity.
- Publisher
- CalculatorGeek
- Reviewed by
- CalculatorGeek Editorial Team
- Recorded review date
- 2026-10-15
- Next source review
- 2027-06-15
- Definition fixtures
- 1 configured scenarios
- Published examples
- 1 shown below
Recorded method
Primary-source mapping, competitor feature-gap review, deterministic fixtures, JavaScript/PHP parity, link integrity and responsive preview QA.
These records describe the published model and reference tests. A test-case count is not a certification of every possible input or an independent specialist review. Editorial policy
Known limitations
- Main-residence rules, pre-CGT assets, foreign-resident rules, indexation, small-business concessions and asset-specific cost-base adjustments are not inferred.
- Rates, thresholds, awards, agreements and legislation can change. Confirm the tax year and current primary source before acting.
- The result is an estimate from entered facts and is not personal tax, legal, payroll or financial advice.
Method sources
- Australian Taxation Office — How to calculate your capital gain or loss
- Australian Taxation Office — More Cost of Living Relief Act 2025 income-tax rates
- Australian Taxation Office — Medicare levy reduction or exemption
Latest model update
2026-10-10 - Completed missing semantic entities, relationships, answer targets, query themes, questions, and visible input/output meaning without changing the calculation model.
Reference inputs and expected results
Up to 12 examples from the configured definition fixtures are shown. Expected values use the stated output units; invalid inputs are intended to be rejected.
| Case | Inputs | Expected result |
|---|---|---|
| Primary Australian reference example | Purchase price: 400000 aud; Sale proceeds: 650000 aud; Acquisition costs: 15000 aud; Disposal costs: 12000 aud; Capital improvements: 10000 aud; Capital losses to apply: 0 aud; Other taxable income: 90000 aud; 50% individual CGT discount applies: yes | Estimated additional tax: 38905; Net capital gain: 106500; Gross capital gain: 213000; Cost base used: 437000; Capital losses applied: 0; CGT discount: 106500; Gain after modeled tax: 174095 (allowed numeric tolerance: 0.01) |
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On this page
Direct answer
For an eligible Australian resident individual, capital losses are applied before the 50% CGT discount. The discounted net capital gain is then included in taxable income; CGT is not a separate flat tax.
Estimate an Australian individual capital gain, cost base, capital-loss offset, optional 50% discount and additional 2026-27 tax.
Use the Australian pay and tax calculator hub to choose the next calculation without repeating the same intent.
Formula and 2026-27 method
Cost base = purchase + eligible acquisition, disposal and capital costs; net gain = (sale - cost base - losses) × applicable discount; additional tax = liability with gain - liability without gain.
The calculation is versioned for the Australian 2026-27 financial year. The result panel keeps the period and source status visible so a value is not detached from the rules that produced it.
To compare this result with another relevant method, open the Australian Tax Return Calculator. Compare entered PAYG withholding with a simplified 2026-27 Australian resident tax, Medicare and optional HELP liability to estimate a refund or amount payable.
Worked Australian example
A AUD 650,000 sale against a AUD 437,000 cost base creates a AUD 213,000 gross gain before losses and any eligible discount.
Working precision is retained through the method. Displayed currency is rounded only at the final output unless the ATO payroll schedule itself requires whole-dollar rounding.
How to interpret the result
Main boundary: Main-residence rules, pre-CGT assets, foreign-resident rules, indexation, small-business concessions and asset-specific cost-base adjustments are not inferred.
Keep gross pay, tax liability, payroll withholding, Medicare, study-loan repayments, super and employment entitlements separate. They answer different questions even when they appear on the same payslip.
What this CalculatorGeek version makes explicit
- The exact Australian financial year and effective date.
- The difference between annual tax liability and pay-run withholding where relevant.
- Super paid on top versus included in a package where relevant.
- Formula components, rounding, limitations and source links beside the result.
- Distinct next-step calculators instead of duplicate thin pages for weekly, fortnightly and take-home wording.
Inputs, outputs and result meaning
A dated Australian capital gains calculation with visible components, sources and limitations.
Inputs
- Purchase price
- Amount paid for the asset. Supported units are AUD.
- Sale proceeds
- Gross proceeds from disposal. Supported units are AUD.
- Acquisition costs
- Eligible incidental acquisition costs. Supported units are AUD.
- Disposal costs
- Eligible incidental sale costs. Supported units are AUD.
- Capital improvements
- Eligible capital expenditure added to cost base. Supported units are AUD.
- Capital losses to apply
- Current or carried-forward losses applied before discount. Supported units are AUD.
- Other taxable income
- Taxable income before the modeled net capital gain. Supported units are AUD.
- 50% individual CGT discount applies
- Select yes only after confirming the asset and ownership period qualify. Available choices are Yes and No.
Outputs
- Estimated additional tax
- This is the primary result. The display rule uses up to 2 decimal places.
- Net capital gain
- The display rule uses up to 2 decimal places.
- Gross capital gain
- The display rule uses up to 2 decimal places.
- Cost base used
- The display rule uses up to 2 decimal places.
- Capital losses applied
- The display rule uses up to 2 decimal places.
- CGT discount
- The display rule uses up to 2 decimal places.
- Gain after modeled tax
- The display rule uses up to 2 decimal places.
The documented method is applied after the inputs are validated and normalized. Keep the result label, unit, selected mode, and stated limitations together when sharing the answer.
Frequently asked questions
Is this Australian Capital Gains Tax Calculator current?
The method is versioned for 2026-27 and the listed primary sources were checked 2026-10-15. Recheck the page after a law, threshold, award or tax-table update.
Is this the same as my payslip or tax return?
Not automatically. Main-residence rules, pre-CGT assets, foreign-resident rules, indexation, small-business concessions and asset-specific cost-base adjustments are not inferred.
Can I change the result to another currency?
No. Statutory Australian inputs and results stay in AUD so exchange-rate conversion cannot be mistaken for an Australian tax calculation.
Can I verify the answer?
Yes. The formula, worked example, calculation bridge, model version and primary sources are visible on the page.
Primary sources and review status
- Australian Taxation Office — How to calculate your capital gain or loss
- Australian Taxation Office — More Cost of Living Relief Act 2025 income-tax rates
- Australian Taxation Office — Medicare levy reduction or exemption
Sources checked 2026-10-15. Rates, thresholds, awards and legislation can change. The page states the 2026-27 period explicitly and should be rechecked before each financial-year release.
Publishing status: CalculatorGeek Editorial Team verified and approved the Australian wage and pay cluster on 2026-10-15. The release retains its visible financial-year, resident-tax, payroll, award, jurisdiction, estimate and professional-advice boundaries; production canonical, cache, sitemap and rollback checks remain deployment gates.