How to Judge Cross-Collateralisation and Keep Control

Cross-collateralisation means your lender holds more than one property as security for your loans. If you own a home in Berkeley Vale and want to buy an investment property, ask early whether each loan can be secured by its own property. That one question can decide how much control you have when it's time to sell or refinance.

What Is Cross-Collateralisation on an Investment Loan?

Cross-collateralisation is when a lender uses two or more properties as joint security for one loan or a group of loans. A common version is a lender taking both your home and your new investment property as security, even when one property alone would cover the debt.

Brokers call this over-securing. The lender gets extra protection, but your properties become tied together. Neither one can be dealt with on its own without the lender being involved. If you're weighing up an investment loan, the security structure matters as much as the interest rate.

How Cross-Collateralisation Can Limit Selling and Refinancing

When properties are cross-secured, selling or refinancing one of them may need the lender's approval and a fresh look at the others. Depending on the lender, you might be asked to pay down part of the debt, or to have the remaining properties revalued before a property is released.

There are two main trade-offs. First, a weaker valuation on one property can affect the whole group. Second, if you fall behind on one loan, the lender may have claims over every property in the package, not just the one that caused the problem.

This is also why refinancing gets harder. Moving one loan to a new lender can mean restructuring all of them, with the extra time and fees that come with it.

How to Structure an Investment Loan Without Cross-Collateralising

The usual alternative is to keep each loan tied to its own property, with a separate loan against your home for the deposit and costs. This can keep your options open, but it may mean extra fees or an extra set of repayments to manage.

As an example, consider a Berkeley Vale homeowner who wants to buy an investment property. Their lender's first offer is to take both the home and the new property as security under one arrangement. A broker could instead suggest a separate $100,000 loan against the home to cover the deposit and costs, and a standalone loan secured only by the new property.

At the illustrative rate of 6.75% p.a., interest on the $100,000 would be about $6,750 a year if it were interest-only, or around $562.50 a month. That rate is an example only. Your actual rate depends on your lender, your deposit size and your loan structure. The borrower would also need to qualify on both loans, so it pays to check your borrowing capacity first. Lenders must test new borrowers against a rate at least 3.0 percentage points above the product rate, which affects how much you can borrow.

Several years later, the investor decides to sell the investment property. Only that property and its loan are involved, so the home loan stays as it is. Without the cross-security, the sale does not depend on a lender revaluing the home or holding back proceeds.

You can test the repayments on both loans with our mortgage repayment calculator.

Does Borrowing Against Your Home Affect Your Tax Deductions?

The tax treatment of interest depends on what the borrowed money is used for, not on which property secures the loan. Under ATO Taxation Ruling TR 2000/2, deductibility is worked out by how each drawdown is used. Interest on money used for private purposes is not deductible, whatever the security.

That is a strong reason to keep the equity loan separate. If the $100,000 in the example goes only towards the investment purchase, the records are clear. If some of it is spent on a holiday or a car, the deductible portion changes. Only the interest part of a repayment is deductible. The principal part is not.

The tax rules for investors are also changing. From the 2027-28 income year, net rental losses from established residential properties bought after 7:30pm AEST on 12 May 2026 can only be deducted against other residential property income, with excess losses carried forward. Properties held at that time, and eligible new builds, are treated differently. Speak to your accountant about how this applies to your situation, as outcomes depend on your circumstances.

When Might Cross-Collateralisation Still Make Sense?

Cross-collateralisation can occasionally make sense when it is the only way to get a loan approved, or when you are happy to hold the properties long term. The cost is less flexibility, so it should be a deliberate choice rather than a default.

If you are offered it, ask the lender for the release terms in writing before you sign. Ask how a single property would be released, whether a revaluation would be needed, and what a paydown might involve. If you already have cross-secured loans, a loan health check can show whether they can be separated, though a lender's policy and any costs will apply.

If you borrow above 80% of a property's value, lenders mortgage insurance is generally required. That 80% point is a lender rule, not a legal cap, so ask how it applies to your loans.

If you're in Berkeley Vale and unsure how your lender has set up your security, talk to your local mortgage broker in Berkeley Vale. Call one of our team or book an appointment at a time that works for you, and we will walk through your loans calmly, one step at a time.

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