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Property Tax Changes · Koste Knowledge Base

What Records Should Investors Keep Because of the CGT and Negative Gearing Changes?

Published 26 June 2026 · Last updated 26 June 2026

Quick Answer

Investors should keep purchase records, sale records, renovation invoices, depreciation schedules, capital works summaries, ownership documents and loan information. These records help accountants review negative gearing, depreciation and CGT cost base outcomes.

The new policy environment makes record keeping more important for Australian property investors than it has been in many years.

The proposed shift to cost base indexation and the 30% minimum tax on capital gains means the quality of your cost base records directly determines your tax position at sale. Missing records cannot be assumed away — they create gaps that the ATO may fill against the investor.

Purchase records to keep: purchase contract, settlement statement, stamp duty records, legal fees, buyer agent fees, loan documents, and any pre-purchase inspection reports.

Ownership records to keep: rental statements, property management records, depreciation schedules, annual tax returns, insurance replacement cost reports, body corporate records, and strata levy statements.

Improvement records to keep: renovation invoices, builder invoices, appliance receipts, architect or designer fees, council approval records, and any construction cost estimates.

Sale records to keep: sale contract, selling agent fees, advertising costs, legal fees on sale, settlement statement, and any costs related to the disposal.

Structure documents: ownership structure documents, SMSF property documents where relevant, trust deed, and any changes to ownership during the holding period.

In our experience preparing CGT cost base evidence reports for investors approaching sale, the records most commonly missing are renovation invoices from more than five years ago, the original construction cost estimate for Division 43, and any improvements made by previous owners that the current investor inherited.

What to do next:

  • Create a digital folder for each investment property and scan all records into it today.
  • Request a copy of your original depreciation schedule from your quantity surveyor.
  • Keep all renovation invoices — even small ones — throughout ownership.
  • Do not change accountants without transferring the full property records file.
  • Contact Koste before selling for a depreciation review or CGT Cost Base Evidence Report.
  • Frequently Asked Questions

    Do I need to keep depreciation schedules?

    Yes. They may be needed for both annual deduction claims and for the accountant CGT cost base calculation when you sell.

    How long should I keep property records?

    Keep records for the full ownership period and for at least five years after sale, or longer if required by your accountant or the ATO.

    Do renovation records matter?

    Yes. Renovations may affect depreciation deductions during ownership and reduce the assessed capital gain at sale through the cost base.

    Should I keep strata records?

    Yes, especially if common property improvements or special levies are involved — these can be added to the cost base.

    Can Koste help organise this information?

    Koste can support the property information and report workflow, making it easier to maintain records throughout the ownership period.

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