Capital Gains Tax Calculator Australia 2025–26

Estimate CGT on property, shares, crypto and other assets for Australian taxpayers

Updated April 2026

Calculate Your Capital Gains Tax

Enter your disposal details, cost base items, losses and taxpayer type

Useful for labels and guidance only. The core CGT math is based on proceeds, cost base and losses.
Trusts, deceased estates, collectables and foreign resident cases are not fully modelled.
Main residence fully exemptSwitch this on only if the dwelling is fully covered by the main residence exemption. Partial exemption and 6-year rule cases need separate modelling.
Add 2% Medicare levy to individual estimateApplies only to individuals and joint owners. Low-income reductions, MLS and other offsets are not modelled.
Assets acquired before 20 September 1985 are generally pre‑CGT assets. Assets acquired before 21 September 1999 may allow indexation comparison.
The 12‑month test is based on how long you owned the asset before the CGT event.
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Examples: brokerage, legal fees, conveyancing, transfer costs and stamp duty that form part of cost base.
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Examples: selling agent commission, marketing, brokerage and disposal legal costs.
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Examples: improvements and additions that increase the asset's cost base.
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For rental property, capital works you can deduct generally reduce the amount left in your cost base later.
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Applied before any CGT discount or indexation result is finalised.
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For a single-asset estimate, these are also deducted before any discount is applied.
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Used only for individual or joint-owner incremental tax estimate.
Estimated capital gains tax payable
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Enter your details to estimate your taxable capital gain, chosen method and approximate tax impact.
Net capital gain$0
Method used
Discount / index benefit$0
Capital loss carry forward$0
This calculator is designed for common Australian CGT scenarios. It does not fully model foreign resident apportionment, partial main residence exemption, 6‑year rule periods, deceased estate concessions, collectables, rollover relief or small business CGT concessions.

How this capital gains tax calculator works

This page is designed to be more useful than a basic CGT calculator by showing the actual moving parts: capital proceeds, cost base, capital works adjustments, capital losses, discount eligibility, pre‑1999 indexation comparison and the final tax impact for the taxpayer type you selected.

1

Work out capital proceeds and cost base

The calculator starts with your sale price, then subtracts the main cost base elements such as purchase price, buying costs, selling costs and capital improvements.

2

Adjust for capital works deductions

For assets like rental property, capital works deductions you can claim do not stay in the cost base, so the calculator reduces cost base by the amount entered.

3

Apply capital losses before any discount

Current-year and carried-forward capital losses are deducted before the CGT discount is considered. This order matters because it changes the final taxable amount.

4

Check the 12-month rule and taxpayer type

If the asset was held for at least 12 months, the calculator can apply the relevant discount rules: generally 50% for individuals, 33.33% for complying SMSFs and no discount for companies.

5

Compare pre‑21 Sep 1999 indexation when relevant

If the acquisition date is before 21 September 1999, the calculator compares the standard route against the indexation method using historical CPI values up to the September 1999 quarter.

6

Estimate the tax impact

For individuals and joint owners, the output shows the incremental tax caused by adding the net capital gain to your other taxable income. For SMSFs and companies, it applies the selected flat rate rules to the net capital gain.

Built for common Australian CGT scenarios

This calculator covers the strongest keyword clusters: capital gains tax calculator Australia, property gains tax calculator, CGT on property, investment property capital gains calculator, capital gains tax on shares and Australian capital gains tax calculator.

Capital gains tax on property

Useful for investment property, land and holiday-home style calculations where you need to include purchase costs, sale costs, capital improvements and capital works adjustments.

Capital gains tax on shares

Useful for shares, ETFs and managed funds where brokerage, parcels and carried-forward capital losses are common parts of the CGT picture.

Investment property capital gains calculator

The property-focused flow includes a dedicated capital works deduction field because that is one of the most missed cost-base adjustments on simpler sites.

Australian capital gains tax calculator

The results are framed for Australian tax settings and common ATO concepts, rather than a generic global capital gains calculator that ignores local rules.

Frequently asked questions

How much capital gains tax will I pay?

There is no single flat CGT rate in Australia for individuals. In a common scenario, your capital gain is added to your taxable income, then taxed at your marginal rate after any losses and eligible discount are applied.

Do I get the 50% CGT discount after 12 months?

Usually yes for Australian resident individuals if the asset was owned for at least 12 months. Complying SMSFs generally get a one-third discount, while companies cannot use the CGT discount.

Can I use capital losses to reduce CGT?

Yes. Capital losses can reduce capital gains, but they must be applied before the CGT discount. If losses exceed your gains, the unused amount is carried forward as a capital loss rather than deducted against salary or wages.

What is the 6-year rule for CGT?

The 6-year absence rule can be relevant when a former main residence is rented out. It is highly fact-specific, so this calculator flags that situation as out of scope rather than giving a false sense of precision.

Do I pay capital gains tax on my main residence?

Your main residence is generally exempt from CGT if you satisfy the ATO conditions. Where only part of the ownership period is exempt, a partial exemption calculation may be needed.

What if I bought the asset before 21 September 1999?

That can open up an indexation comparison. For eligible assets, this calculator compares the standard discount route against the indexation method using historical CPI values up to September 1999.

Can I use this as a capital gains tax calculator for inherited property?

Only as a rough starting point. Inherited assets often need special cost-base and exemption rules, so a separate inherited-property flow is better for production.

Is this calculator suitable for foreign residents?

Not fully. Foreign resident CGT treatment can involve different discount rules and foreign resident capital gains withholding for some property sales, so this calculator deliberately leaves that out.

Official source checklist used for this calculator

  • ATO guidance on cost base of assets, cost base adjustments for capital works, CGT discount rules, using capital losses and CGT events.
  • ATO resident tax rate pages, Medicare levy guidance and company/SMSF tax guidance for the tax-impact estimate layer.
  • ABS historical CPI series for pre‑21 September 1999 indexation comparison.