Capital Gains Tax Calculator

Estimate the gross capital gain, the 50% CGT discount where available, and the additional tax created when the gain is added to your other income.

Additional CGT

$37,850

18.9% effective rate

CGT Inputs

Financial Year

Tax rates and thresholds vary by year

Asset type

Purchase price

Enter the acquisition cost before discounts or offsetting losses.

Sale price

Use the total capital proceeds from the disposal.

Purchase dateSale date

Other annual income

Used to estimate the extra tax on the taxable capital gain.

CGT Inputs

Financial Year

Tax rates and thresholds vary by year

Asset type

Purchase price

Enter the acquisition cost before discounts or offsetting losses.

Sale price

Use the total capital proceeds from the disposal.

Purchase dateSale date

Other annual income

Used to estimate the extra tax on the taxable capital gain.

Additional tax on the gain

$37,850

Gross capital gain: $200,000

Gross capital gain

$200,000

Taxable capital gain

$100,000

Discount applied

50%

Effective CGT rate

18.9%

50% CGT discount applied

The asset was held for more than 12 months, so only $100,000 of the gain is added to your taxable income.

Tax comparison

Tax before capital gain: $16,388
Tax after capital gain: $54,238
Holding period: 2206 days
Discount removed from gain: $100,000

What this CGT estimate does and does not cover

It estimates the incremental tax effect

Rather than applying a flat CGT rate, the calculator measures the increase in total tax once the taxable gain is added to your other annual income. That reflects how capital gains are actually taxed for individuals in Australia.

The 50% discount changes taxable income, not the tax rate

If you qualify for the discount, only half the gain is added to taxable income. Your marginal tax rate still depends on your wider income position after that gain is included.

Cost-base adjustments are not modelled

Real CGT calculations can include brokerage, stamp duty, improvements, legal fees, capital losses carried forward and asset-specific exemptions. Treat this as a clean baseline, not a final tax return figure.

Frequently Asked Questions

How is the additional CGT estimate calculated?

The calculator works out the taxable capital gain, adds it to your other annual income, then reruns the site's tax engine. The extra tax shown is the difference between tax with the gain and tax without it.

When does the 50% CGT discount apply?

For individuals, the standard discount applies when an eligible asset has been held for more than 12 months. In that case only half of the capital gain is added to taxable income.

What happens if the result is a capital loss?

The calculator shows a capital loss and sets additional tax to zero. Capital losses generally carry forward to offset future capital gains and do not reduce salary or wage income directly.

Does the property option include main-residence exemptions?

No. The property option is there for context only. This tool does not model main-residence exemptions, partial exemptions, cost-base adjustments, or state-specific transaction costs.

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