Australia Rental Borrowing Records: What to Keep in 2026

Part of the Rental Rule Changes Watch 2026 series.

This guide applies to Australia-wide federal income tax. It does not set tenancy, mortgage stamp duty, property-transfer duty, or land-title rules for New South Wales, Victoria, Queensland, South Australia, Western Australia, Tasmania, the Australian Capital Territory, or the Northern Territory.

The primary sources were reviewed on 21 July 2026. The Australian Taxation Office borrowing-expense and interest guidance updated in May 2026, its current Tax Time Toolkit, its Rental properties guide 2025, and the Income Tax Assessment Act 1997 compilation dated 1 April 2026 were checked for this article.

What Rental Borrowing Expense Records Should Australian Owners Keep?

Keep three linked schedules: fee classification, loan-purpose allocation, and annual claims.

Which Costs Count as Australian Rental Borrowing Expenses?

The Australian Taxation Office borrowing-expenses guidance, reviewed on 21 July 2026, describes borrowing expenses as costs incurred to take out a loan to buy property.

Its current rental borrowing-expenses toolkit lists:

• loan establishment fees
• lender’s mortgage insurance taken out by the lender and billed to the borrower
• stamp duty charged on the mortgage
• title-search fees charged by the lender
• costs of preparing and filing mortgage documents, including relevant legal fees
• mortgage broker fees
• a valuation fee required for loan approval

For each fee, record:

The fact is the Australian Taxation Office category. The practical implication is to preserve the source description instead of renaming every settlement cost loan fee.

Which Loan Costs Are Not Borrowing Expenses?

The same Australian Taxation Office toolkit separates borrowing expenses from:

• the amount borrowed and the loan balance
• principal repayments
• interest, which is considered under the separate interest rules
• annual loan package fees, which the toolkit directs to sundry expenses
• state or territory duty on the transfer of property title
• legal and conveyancing costs for buying the property
• stamp duty for acquiring a leasehold interest, including an Australian Capital Territory 99-year Crown lease
• premiums for insurance that pays out the loan if the borrower dies, becomes disabled, or loses employment
• expenses attributable to a private-use part of the loan

Do not infer that an excluded cost is never relevant to tax. Some costs may be considered under another deduction provision or form part of the capital gains tax cost base. Keep the evidence and obtain Australian tax advice on its correct treatment.

This distinction is especially important at settlement, where transfer duty, conveyancing, loan establishment, title search, valuation, and prepaid interest can appear on one statement but follow different tax treatments.

When Is the Deduction Spread Over Five Years?

The current Australian Taxation Office guidance says eligible borrowing expenses are generally deducted over five years. Where the original loan term is shorter, the shorter loan period applies. Expenses of $100 or less can generally be claimed in the income year incurred.

Section 25-25 of the Income Tax Assessment Act 1997, in the compilation dated 1 April 2026, defines the loan period as the shortest of:

1. the period in the original loan contract
2. the period from the first borrowing date to the date the loan is repaid
3. five years from the first borrowing date

The first and last income years are therefore not automatically one-fifth each. The calculation follows relevant days.

Keep one schedule per loan:

Do not replace the schedule with 20% per year. That shortcut can be wrong when the loan starts part-way through an income year, has a term under five years, is repaid early, or is partly private.

What If the Loan Is Partly Private?

Section 25-25 allows borrowing-expense deductions only to the extent the borrowed money is used to produce assessable income. If the money is partly used for that purpose, the expense must be apportioned.

The Australian Taxation Office’s interest-expenses guidance, updated 21 May 2026, also emphasises tracing the use of borrowed funds where a loan account has private use. Interest and borrowing expenses are different categories, but both depend on what the borrowed money funded.

Keep:

1. every drawdown and destination account
2. settlement payment records
3. private redraws and their purpose
4. rental-property redraws and supporting invoices
5. repayments and any lender allocation method
6. the calculation used to allocate the original borrowing costs
7. the calculation used for each later fee or refinance cost

The property offered as security does not, by itself, establish the loan purpose. Trace the money from borrowing to use.

Use Australian Rental Deduction Apportionment 2026 for the broader time, area, below-market, family-use, and loan-purpose evidence framework.

What Happens on Refinance or Early Repayment?

The Income Tax Assessment Act 1997 makes the actual repayment date part of the loan-period test. The Australian Taxation Office Rental properties guide says that when a loan is repaid early in less than five years, the remaining eligible borrowing expenses may be claimed in the year of repayment.

A refinance creates at least two evidence questions:

1. when and how the old loan was repaid, including any remaining unclaimed borrowing expenses
2. which new costs relate to taking out the replacement loan and how the new borrowed money is used

Keep the old and new loan files separate but linked. Retain:

• payout quote and discharge statement
• settlement or refinance completion statement
• old schedule showing claims and remaining balance
• new loan contract and drawdowns
• new establishment, valuation, broker, mortgage-document, and lender’s mortgage insurance costs
• any private amount added during the refinance
• accountant’s treatment of the old balance and new fees

Do not carry the old five-year schedule forward unchanged after the old loan has been repaid. Do not automatically treat every refinance cost as deductible without tracing the new borrowing purpose.

What Does a Claim-Ready Annual Schedule Look Like?

For each Australian income year, preserve a row that can be reproduced from source documents:

The schedule is an interpretation layer. Keep the lender and supplier documents underneath it so an accountant or the Australian Taxation Office can test the classification and numbers.

How Long Should Australian Borrowing Records Be Kept?

The Australian Taxation Office’s rental property records guidance says rental income and expense records are generally kept for five years from 31 October after the relevant return, or for five years from a later lodgment date. If a dispute remains open at the end of that period, the relevant records should be kept until it is resolved.

Because borrowing expenses can be claimed across several income years, the original fee evidence is used in more than one return. Keep the complete source file through the final claim and then for the record period applying to that return.

Keep records longer where they also affect:

• the capital gains tax cost base
• a carried-forward tax loss
• an amended assessment or dispute
• ownership allocation between co-owners
• an active refinance, lender, or professional-advice issue

The Australian Taxation Office says rental expense records should identify the supplier, amount, nature of the goods or services, date incurred, and document date. If the document does not show payment timing, preserve independent evidence such as a bank statement.

Practical Filing Pattern

For each Australian rental loan, keep a borrowing-expenses folder with:

1. loan-application-and-approval
2. loan-contract-and-drawdowns
3. settlement-and-funds-flow
4. lender-fee-statements
5. broker-legal-valuation-and-title-search-invoices
6. lenders-mortgage-insurance
7. private-use-and-apportionment
8. five-year-deduction-schedule
9. annual-tax-claims-and-workpapers
10. refinance-or-early-repayment
11. capital-gains-tax-cost-base-copies
12. retention-review

Use the loan start date and lender reference in filenames. fees.pdf does not show whether a cost belongs to the original loan, a later refinance, the property purchase, or a private redraw.

Related Proppi Guides

• Australia Rental Tax Changes 2026: What the Australian Taxation Office Is Watching
• Australian Rental Deduction Apportionment 2026
• Australia Rental Repairs vs Improvements Records
• Australia Rental Property Depreciation Schedule Records
• EOFY 2026 Australian Landlord Tax-Prep Playbook
• ATO Property Data-Matching 2026
• How Proppi Builds Property Memory from Documents
• Australian Taxation Office

Source Note

This article covers Australia-wide federal income tax. It relies on the Australian Taxation Office and the current Income Tax Assessment Act 1997. It does not describe state or territory tenancy rules and is general information about organising rental loan records, not tax, legal, lending, mortgage, financial, or accounting advice.

Last reviewed: 21 July 2026. Confirm the current position with the Australian Taxation Office, current federal legislation, and a registered Australian tax agent.

The Short Version

1. Keep itemised evidence for every cost incurred to take out the rental loan.
2. Separate borrowing expenses from interest, principal, annual fees, transfer duty, conveyancing, and private insurance.
3. Trace borrowed money to income-producing rental use and apportion any private component.
4. Calculate claims by relevant days over five years or the shorter loan period, not a flat undocumented percentage.
5. Link refinance or early repayment records to the old schedule, the new loan, and each Australian tax return.