Avoid These 4 Mistakes When Refinancing Multiple Properties

Refinancing Each Property as a Separate Transaction

Refinancing multiple properties should be treated as one connected strategy, not several individual applications. When you refinance properties one at a time without a plan, you can accidentally reduce your borrowing capacity before you finish the portfolio.

Consider someone who owns a home in Rockingham and an investment property in Baldivis. They refinance the investment property first, extending the loan term from 22 years remaining back to 30 years. The monthly repayment drops, which feels like progress. But when they apply to refinance the Rockingham property two months later, their borrowing capacity has shrunk because the lender now sees a longer commitment on the investment loan. The second refinance doesn't go through, and they're stuck with mismatched loans across the portfolio.

The order you refinance in affects what you can borrow next. It also affects how much equity a lender will let you access and whether your income can support all the loans you're trying to move. If you're planning to release equity from one property to fund another purchase, that needs to happen before you extend loan terms elsewhere.

Stretching Loan Terms Without Checking the Overall Cost

Extending your loan term on one property might lower the repayment, but it can increase what you pay over time across the whole portfolio. Some borrowers extend terms on multiple properties to improve cashflow, then realise years later they're paying tens of thousands more in interest than they needed to.

If you extend a loan from 20 years remaining to 30 years, you're adding 10 years of interest. Do that across three properties and the compounding effect adds up quickly. It might make sense on one loan if you're redirecting that cashflow into paying down another property faster, but it shouldn't be the default approach on every loan.

A useful way to manage this is to keep shorter terms on loans with lower balances and extend terms only on properties where the rental income or your offset balance can absorb the extra interest. If you're refinancing to access equity, the new borrowing will usually come with a 30-year term anyway, so extending existing loans on top of that can leave you overcommitted.

Assuming All Lenders Will Value Your Properties the Same Way

Lenders use different valuation models, and when you're refinancing multiple properties, those differences matter. One lender might value your property based on recent sales in the street. Another might use a desktop valuation that comes in $50,000 lower, which changes how much equity you can access and whether the loan fits their lending ratio.

In our experience, this becomes an issue when someone assumes they have 80% equity across the portfolio and applies to refinance everything at once. One property gets a lower valuation than expected, the loan-to-value ratio shifts, and suddenly the whole application needs lender's mortgage insurance or doesn't proceed at all. You don't always get to challenge a valuation, and even if you do, it delays the process.

If you're refinancing a portfolio, it's worth understanding which lender is likely to give you the most accurate valuation for each property type and location. That's something a broker can help with before you apply, rather than discovering it during assessment. It also helps to know your loan-to-value ratio on each property before you start, so you're not relying on optimistic equity estimates.

Ignoring How Cross-Securitisation Affects Future Flexibility

Cross-securitisation means one lender holds multiple properties as security across your loans. It can make the initial refinance process faster because everything sits under one application, but it limits what you can do later. If you want to sell one property, you'll need the lender's permission to release it from the security pool. If you want to refinance just one loan down the track, you might not be able to without refinancing the whole lot.

This often comes up when someone refinances two or three properties with the same lender to save time, then wants to sell an investment property a year later. The lender reviews the remaining security and decides they need you to pay down one of the other loans before they'll release the property you're selling. That can mean pulling cash from offset accounts or renegotiating the structure when you're trying to settle a sale.

If you're refinancing multiple properties, it's worth keeping them with separate lenders or at least on separate securities where possible. It takes a bit more coordination upfront, but it means you can move, sell, or refinance individual properties later without needing to restructure the entire portfolio. A loan health check across your whole portfolio can help you see where cross-securitisation might be creating problems you haven't noticed yet.

Refinancing a portfolio involves more moving parts than refinancing one home. The sequence matters, the loan terms compound across properties, and the way security is structured affects what you can do in the future. If you're refinancing more than one property, or thinking about it, call one of our team or book an appointment at a time that works for you.

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