Reviewed 31 October 2026

Investment Property Tax Deductions: Records and Questions

Separate private and income-producing use

A property expense is not automatically deductible because the property is called an investment. Check whether it relates to earning rental income, the period of use, any private use and apportionment. Retain invoices and records of availability for rent.

Distinguish repairs from improvements

Repairs, initial repairs, improvements and depreciating assets can have different treatment. Do not assume that renovation spending is immediately deductible. Capital works depend on eligibility, construction details and the relevant rules.

Trace the use of borrowed funds

Interest treatment depends on the use of the borrowed money, not simply the property used as security. Principal repayments are different from interest. Mixed-purpose loans, redraws and refinancing can require careful records and professional assistance.

Do not equate a deduction with a profit

A deduction reduces taxable income where allowed; it does not reimburse the full expense or establish a sound investment. The result depends on the marginal position, other tax effects and the actual eligible amount. Avoid assuming a fixed tax saving.

Check changes and the relevant income year

Property tax rules and announced reforms can change. Use current ATO guidance for the property, acquisition date and tax year. A general calculator cannot determine eligibility for every deduction, offset or capital-gains treatment.

Official sources

Read ATO rental property guidance. Use the calculator to explore assumptions, and obtain advice from a registered tax professional for the actual return. General information only.

General educational information only. Check current official rules and seek qualified advice for personal decisions.