cgt_estimate
Australian capital gains tax estimate
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Estimate Australian capital gains tax for a resident individual by taxing the gain at the marginal rate on top of other income (the difference of two income-tax calculations). Use it for AU asset-sale questions (shares, property, crypto); for pay without an asset sale use income_tax_estimate — other countries' CGT is not covered and returns an error. Applies capital losses before the 50% discount for assets held over 12 months, per ATO ordering; the main-residence exemption and non-resident rules are out of scope.
Input schema
| Property | Type | Required | Description |
|---|---|---|---|
| income | number | yes | Other taxable income for the year in AUD (salary etc.) — sets the marginal rate the gain stacks on |
| proceeds | number | yes | Sale price of the asset in AUD |
| costBase | number | yes | Cost base in AUD — what the asset cost, including eligible incidental costs |
| capitalLosses | number | no | Capital losses to offset, in AUD — applied against the gross gain before any discount |
| heldMoreThan12Months | boolean | yes | True when the asset was held over 12 months, which halves the taxable gain (the 50% CGT discount) |
Raw JSON schema
{
"type": "object",
"properties": {
"income": {
"type": "number",
"minimum": 0,
"description": "Other taxable income for the year in AUD (salary etc.) — sets the marginal rate the gain stacks on"
},
"proceeds": {
"type": "number",
"minimum": 0,
"description": "Sale price of the asset in AUD"
},
"costBase": {
"type": "number",
"minimum": 0,
"description": "Cost base in AUD — what the asset cost, including eligible incidental costs"
},
"capitalLosses": {
"type": "number",
"minimum": 0,
"default": 0,
"description": "Capital losses to offset, in AUD — applied against the gross gain before any discount"
},
"heldMoreThan12Months": {
"type": "boolean",
"description": "True when the asset was held over 12 months, which halves the taxable gain (the 50% CGT discount)"
}
},
"required": [
"income",
"proceeds",
"costBase",
"heldMoreThan12Months"
],
"additionalProperties": false
}