- Investment Lending
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Investment Loan Structure Guide
The structure of an investment loan can have a significant impact on borrowing capacity, cash flow, tax position and future property goals. Getting the structure right from the beginning is important.
Quick Answer
Investment loan structure involves decisions about loan type, repayment method, offset account, loan splitting and lender selection. Each decision affects cash flow, tax and future borrowing capacity differently.
Key Structural Decisions
✓ Interest-only vs principal and interest — affects cash flow and tax
✓ Offset account — whether to have it on the owner-occupied or investment loan
✓ Loan splitting — separating purposes for clear record-keeping
✓ Fixed vs variable rate — certainty vs flexibility
✓ Lender choice — policies on rental income, IO periods and portfolio limits
Common Structural Mistakes
✓ Mixing loan purposes — creates cross-collateralisation and record-keeping issues
✓ Using offset against investment loan instead of owner-occupied loan
✓ Not considering future borrowing capacity before committing to structure
✓ Over-committing to fixed rates before reviewing refinance options
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Frequently Asked Questions
What is cross-collateralisation and why avoid it?
Cross-collateralisation links multiple properties as security for one or more loans. It can complicate future refinancing and sale of individual properties.
Should I have an offset account on my investment loan?
Generally, offset accounts are more beneficial when applied to owner-occupied loans from a tax perspective. This is worth discussing with your accountant.
Why Investment Loan Structure Matters As Much As Rate
Many investors focus on interest rate when choosing a lender for an investment loan. But structure — how the loan is set up, whether it’s split from the owner-occupied loan, what repayment type is used and which property is used as security — often has as much impact as rate.
Example: Nurse Earning $85,000
✓ Loan purpose clarity — investment vs owner-occupied must be separate
✓ Cross-collateralisation — linking properties reduces flexibility
✓ Interest-only vs principal and interest — cash flow and tax implications
✓ Offset account placement — typically more effective on owner-occupied loan
✓ Lender exposure limits — some lenders cap portfolio lending
✓ Future borrowing capacity — each investment loan affects next purchase
Cross-Collateralisation: A Structural Risk
Cross-collateralisation links multiple properties as security for one or more loans. While this can help with initial approval, it complicates future refinancing, partial sales and restructuring. Most experienced investors and brokers recommend keeping securities separate where possible.
Offset Accounts And Investment Loans
An offset account reduces the interest charged on the loan it’s attached to. From a tax perspective, placing offset against the owner-occupied loan (non-deductible debt) while keeping the investment loan fully drawn may be more advantageous — but this depends on individual tax position. Always consult your accountant.
Common Mistakes In Investment Loan Structure
✗ Cross-collateralising all properties with one lender
✗ Placing offset savings against the investment loan instead of the owner-occupied loan
✗ Not considering how one investment loan affects capacity for the next
✗ Choosing interest-only without understanding the long-term cost and lender policy changes
What is cross-collateralisation?
Linking multiple properties as security for one or more loans. It complicates future refinancing and sales.
Should offset be on investment or owner-occupied loan?
Generally more effective on the owner-occupied loan from a tax perspective. Confirm with your accountant.
Review Your Investment Loan Structure
We assess structure, lender options and future capacity.
General information only. Lending eligibility, LMI waiver policies, rates and approval outcomes vary by lender and are subject to assessment.
Review Your Investment Loan Structure
We assess structure, lender options and future capacity.
General information only. Lending outcomes vary by lender and individual circumstances.
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Written by: Simpli Finance Lending Team · Reviewed by: [Broker Name], Mortgage Broker · Last updated: June 2026