Cgt Cost Base · Koste Knowledge Base

Do unclaimed capital works deductions affect CGT?

Published 26 June 2026 · Last updated 26 June 2026

Quick Answer

In some cases, capital works deductions that were available to claim may still need to be considered when calculating CGT, even if they were not actually claimed. This is why investors should review depreciation before selling.

Capital works deductions can affect CGT cost base.

The issue is not always limited to what was actually claimed. In some cases, deductions that could have been claimed may need to be considered.

This means investors should review:

Whether a depreciation schedule existed
Whether capital works were available
Whether claims were made
Whether records are complete
Whether the property changed use
Whether renovations occurred
Whether the accountant has all schedules

Koste.ai can help identify whether a retrospective depreciation or CGT cost base review is needed before sale.

Frequently Asked Questions

Can unclaimed deductions still matter?

In some circumstances, yes. Your accountant should review this.

Should I get a schedule before selling?

It may help identify available capital works.

What if I never claimed depreciation?

A review may still be useful before sale.

Does this apply to all depreciation?

The key issue is usually capital works.

Can Koste.ai help?

Yes. Koste.ai can support pre-sale depreciation and cost base reviews.

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Written by Koste Team · Koste Chartered Quantity Surveyors · AIQS Member · RICS Member · TPB Registered · 1300 669 400 · info@koste.ai