A One Accountants

Capital Gains Tax

Share CGT Calculator

Upload your trade history or enter manually — auto-calculate CGT with 50% discount & export reports

Tax Settings

Upload Trade History (Excel)
Required Excel columns: Date Acquired | Date Sold | ASX Code | Quantity | Cost Base (total $) | Sale Proceeds (total $) | Brokerage (optional)
Dates in DD/MM/YYYY format. One row per parcel. Download the template below.
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Click to upload or drag & drop your Excel file
.xlsx or .xls files accepted


Important Disclaimer: This calculator is provided by A One Accountants for general informational purposes only. CGT calculations depend on your full tax circumstances including other income, losses, residency status, trust distributions, and ATO assessments. The 50% CGT discount applies to Australian tax residents holding assets for more than 12 months. This tool does not account for wash sales, employee share schemes, or complex ownership structures. Results are estimates only and do not constitute tax advice. Always consult A One Accountants or a registered tax agent before lodging your return. A One Accountants Pty Ltd accepts no liability for any reliance on this tool.