Capital Gains Tax (CGT) Estimate Reports
Establish The Property Costs Behind Your CGT Assessment
Our Capital Gains Tax (CGT) Estimate Reports assess property costs, construction expenditure, capital improvements and relevant historical deductions to support your accountant or tax adviser when determining the CGT position of an investment property.Prepared by Chartered or Certified Quantity Surveyors who are voting members of RICS, and or AIQS, our reports provide a documented assessment of relevant property costs and the methodology used to establish them.
Professional CGT Cost Assessment
Accurate cost information is an important part of establishing a property's CGT position. The cost base may include the original purchase price, eligible acquisition costs, construction expenditure, capital improvements and other applicable costs, subject to relevant adjustments.Our Quantity Surveyors review available property records, construction information, drawings, specifications and historical depreciation records to establish or reconstruct relevant costs. Where records are incomplete, we use appropriate Quantity Surveying methodologies and supporting evidence to provide a clear basis for the assessment.
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When Do You Need A CGT Estimate Report?
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A CGT assessment may be useful when:
Selling an investment property
Selling an inherited property that has generated income
Converting a main residence into an investment property
Assessing a property with mixed or changing use
Reviewing an SMSF-owned property
Reconstructing historical construction or improvement costs
A fully exempt main residence will generally not require a CGT cost assessment. However, CGT considerations may arise where the property has been used to generate income or its use has changed during ownership.
What Our CGT Estimate Report Includes
Site Inspection & Capital Improvements Assessment
Where required, we inspect the property to identify visible capital improvements and assess their nature, extent and condition. Findings are cross-checked against available documentation and historical information.
Cost Base Reconstruction
We assess relevant costs including purchase price, stamp duty, conveyancing, qualifying capital improvements and other applicable property expenditure.
Depreciation Reconciliation
We review historical depreciation records to reconcile relevant Division 43 capital works deductions and identify adjustments that may affect the property's cost base.
Cost Base Indexation
For eligible assets acquired before 11:45am on 21 September 1999, applicable CPI indexation can be assessed and presented transparently.
CGT Method Comparison
Where applicable, discount and indexation methods can be presented side by side, giving your accountant or tax adviser clear figures to consider.
Estimate Range
Where historical information requires assumptions, we can provide a reasonable estimated range. The assumptions, methodology and supporting basis are documented within the report.
Professional Review
Reports are prepared or reviewed by Quantum QS as a Registered Tax Agent with the Tax Practitioners Board, providing an additional professional review of the property cost assessment.
The applicable CGT method depends on factors including acquisition date, ownership period, asset type and taxpayer circumstances.Eligible assets acquired after 21 September 1999 may qualify for the 50% CGT discount where the relevant requirements are met. Eligible assets acquired before 11:45am on 21 September 1999 may have access to indexation.Quantum QS assesses the relevant property costs and construction information. Your accountant or tax adviser determines the final CGT calculation, eligibility and tax treatment.
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Why Choose Quantum QS?
Chartered and Certified Quantity Surveyors
RICS and AIQS professional standing
Registered Tax Agent review
Detailed construction cost methodologies
Historical cost reconstruction
Capital improvement assessment
Clear assumptions and supporting calculations
Professional reporting for accountants and tax advisers
This provides your tax professional with a structured, evidence-based assessment of the property costs relevant to the CGT calculation.
Turnaround & Required Information
Documents may include:
Purchase contract and settlement information
Stamp duty and acquisition records
Conveyancing or legal invoicesRenovation, extension and capital improvement records
Depreciation or capital works schedules
Sale contract or proposed disposal information
If records are missing, we can work with available information and appropriate supporting evidence to reconstruct relevant costs.
Obtain Your CGT Estimate Report

Frequently Asked Questions
It is a professional assessment of property costs, capital improvements and relevant historical deductions to support your accountant or tax adviser.
Not always, but it can be valuable where construction costs, improvements or historical deductions need to be established or reconstructed.
Relevant Division 43 capital works deductions can affect the property's cost base and capital gain. Your adviser confirms the final treatment.
We can use available documents and supporting evidence to reconstruct relevant historical property costs using appropriate Quantity Surveying methodologies.
Our standard turnaround is 5–10 business days, depending on property complexity, available records and whether a site inspection is required.
