Who can claim
This deduction is available to individuals and companies.
- The instrument is a traditional security for the statutory rules.
- A disposal or redemption produced a deductible section 70B loss.
What you cannot claim
- Do not claim a capital loss or ordinary investment decline again under this rule.
- Private, exempt-income and non-qualifying securities are excluded.
How the amount is worked out
Calculate the section 70B loss using the security's acquisition cost, disposal or redemption proceeds and required adjustments.
Records the ATO expects
- Security terms
- Acquisition and disposal statements
- Section 70B calculation
Where this rule comes from
Primary source: Income Tax Assessment Act 1936 section 70B (Section 70B). Reviewed 30 July 2026. Covers the 2025-26 and 2026-27 income years.