Common Mistakes When Refinancing Multiple Properties

Refinancing one property involves weighing rate, features, and settlement timing. Refinancing multiple properties requires coordinating all of that across several loans, multiple valuations, and lender policies that shift depending on how many properties you already hold.

Most investors refinance each property in isolation, treating every loan as a separate transaction without considering how one approval affects the next. That approach can leave you with mismatched loan structures, equity locked away in the wrong properties, or serviceability constraints that block your next refinance before you finish the first.

Why Refinancing Multiple Properties Is Different From Refinancing One

When you refinance multiple properties at once, lenders assess your entire portfolio as part of the serviceability calculation. Each additional property increases your rental income, but it also adds maintenance costs, vacancy risk, and debt servicing commitments. Lenders apply a rental income shading factor, typically around 80%, meaning they only count 80% of declared rent when calculating your borrowing capacity. They also apply interest rate buffers, usually 3% above the actual rate, to stress-test whether you can service the loans if rates rise.

If you refinance one loan without considering the others, you might inadvertently reduce your serviceability for the next application. A lender might approve the first refinance and then decline the second because your debt-to-income ratio has shifted. Timing matters, and so does the order in which you approach each lender.

Lender Appetite and Portfolio Concentration Risk

Not all lenders will refinance multiple properties at the same time. Some have internal limits on how many properties they'll lend against for a single borrower, especially if most of those properties are in the same suburb or postcode. This is known as concentration risk.

Consider an investor in Victoria who owns three units in the same apartment complex and wants to refinance all three loans to access equity. One lender might decline the application on the basis that too much of the borrower's portfolio is tied to a single building. Another lender might approve one or two but cap exposure on the third. A third lender might accept all three properties but reduce the loan-to-value ratio to 70% instead of the usual 80% because of the concentration.

We regularly see this with clients who own multiple properties in growth corridors across Melbourne's west and north. The properties perform well individually, but lenders view the portfolio as higher risk if everything is located within a 10-kilometre radius. Spreading your refinance across two lenders, or staging the applications over a few months, can reduce this friction.

Matching Loan Structure to Property Purpose

Each property in your portfolio likely serves a different purpose. One might be your primary residence, another a long-term hold for capital growth, and a third a positively geared investment you plan to sell within a few years. Refinancing all of them onto identical loan structures rarely makes sense.

Your primary residence benefits from an offset account that reduces interest without affecting deductibility. Your investment properties, by contrast, benefit from keeping the loan balance as high as possible and avoiding offsets, so you can maximise tax-deductible interest. If you refinance your investment loans with offset accounts and start parking cash in them, you reduce your deductions without gaining any real benefit.

Fixed rates make sense for properties where cashflow stability is the priority. Variable rates make sense where you want flexibility to make lump sum repayments or redraw. If you refinance everything onto the same product because it has the lowest advertised rate, you might lock yourself into features that don't suit half your portfolio.

Coordinating Valuations and Settlement Timing

When you refinance multiple properties, each one requires a valuation. Some lenders will accept desktop valuations if the loan-to-value ratio is conservative. Others require a full valuation, which adds time and cost. If you're refinancing three properties and two come back at or above expectation but one comes in lower than anticipated, the entire refinance can stall while you renegotiate loan amounts or switch lenders.

Settlement timing also compounds across multiple properties. If you're refinancing three loans with three different lenders, each has its own processing timeline. One might settle in four weeks, another in six, and the third might take eight weeks if the valuation is delayed. If those loans are interdependent, for example if you're using equity from Property A to fund settlement costs on Property B, any delay in the first loan affects the second.

Staging the refinance so that the most time-sensitive property settles first, or consolidating two properties with the same lender to align settlement, can prevent bottlenecks. It also reduces the number of discharge fees you'll pay, since moving multiple loans to one lender often means fewer outgoing lenders to settle with.

Serviceability Traps When Refinancing in Sequence

If you refinance one property and then apply to refinance another a few months later, your serviceability will be reassessed using the updated loan balance from the first refinance. If you accessed equity during the first refinance, your debt has increased, which reduces your borrowing capacity for the second.

In a scenario like this, an investor refinances their primary residence and draws down $100,000 in equity to use as a deposit on their next purchase. Six months later, they apply to refinance an existing investment property to access another $80,000. The lender reassesses their income, applies the rental shading and interest buffer to all properties, and determines that the new debt from the first refinance has pushed them over the serviceability threshold. The second refinance is declined, and the equity in that investment property remains inaccessible.

Planning both refinances at the same time, even if they settle separately, allows you to structure the applications so that lenders assess your serviceability with the end state in mind rather than reacting to each transaction in isolation.

Cross-Collateralisation and How It Limits Future Refinancing

Some lenders will offer to refinance multiple properties under a single loan account, using all properties as security. This is called cross-collateralisation. It can simplify administration and reduce paperwork, but it also means you can't refinance or sell one property without the lender's approval to release it from the security pool.

If property values rise unevenly and one property outperforms the others, you can't access that equity without refinancing the entire loan. If you want to sell one property, the lender might require you to pay down the loan to a level that maintains the overall loan-to-value ratio across the remaining properties. That can force you to inject cash or delay the sale.

Keeping each property on a separate loan, even if they're with the same lender, preserves flexibility. You can refinance or sell individual properties without affecting the others, and you can structure each loan according to the specific needs of that property.

When to Use a Loan Health Check Before Refinancing

Before refinancing multiple properties, it's worth reviewing your entire portfolio to identify which loans are costing you the most and which properties have the most accessible equity. A loan health check compares your current interest rates, fees, and loan features against what's available in the market, and highlights where refinancing will deliver the most value.

If one property is on a high variable rate and another is coming off a fixed rate period, those are the two to prioritise. If a third property is already on a competitive rate with the features you need, there's no urgency to refinance it. Staging your refinance based on where you'll gain the most, rather than refinancing everything at once, can save time and reduce the risk of serviceability issues.

If you're planning to access equity for your next investment, knowing which property has the most usable equity before you start the refinance will help you structure the application correctly from the outset.

Refinancing multiple properties at once requires more coordination than refinancing one, but the process is manageable if you plan the sequence, understand how lenders assess portfolio risk, and structure each loan to suit the role that property plays in your broader strategy. Call one of our team or book an appointment at a time that works for you.

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