Avoid These 5 Mistakes When Buying a Holiday Home

Lenders treat holiday home purchases as investment properties, even when you plan to use them yourself.

If you're considering a holiday home on the coast or in a regional area, the loan structure matters as much as the location. Most Castle Hill residents we work with assume a holiday home loan works the same way as their owner-occupied mortgage. It doesn't. Lenders apply investment property criteria, which means higher interest rates, lower borrowing capacity, and stricter serviceability tests. Understanding how the assessment works before you start looking will save you from making an offer you can't actually settle.

Assuming Your Borrowing Capacity Stays the Same

Your borrowing capacity drops when you apply for a holiday home loan because lenders assess it as an investment property. Even if you don't plan to rent it out, the loan is structured based on investment criteria, which typically means you can borrow 10-15% less than you could for an owner-occupied purchase. Lenders also apply a higher assessment rate to calculate serviceability, often adding a 3% buffer on top of the actual interest rate. If you're already carrying a mortgage on your Castle Hill property, the combined repayments on both loans will reduce how much a lender is willing to approve.

Consider a buyer who owns a home in Castle Hill with a remaining mortgage of $600,000. They want to purchase a holiday home and assume they can borrow the same amount they were approved for when they bought their primary residence. When they apply, the lender calculates serviceability using both the existing mortgage and the proposed holiday home loan at investment rates. The assessment rate applied is higher, and the rental income they might earn from occasional short-term letting isn't counted because they intend to use the property themselves most of the year. The result is a borrowing capacity that's $150,000 lower than expected, forcing them to either reduce their budget or increase their deposit.

Borrowing capacity calculations for holiday homes require detailed modelling before you start looking at properties. If you're planning to keep your Castle Hill home and add a second property, the combined debt servicing will be the main constraint.

Choosing the Wrong Loan Structure for Seasonal Use

A variable rate loan usually makes more sense for a holiday home than a fixed rate, particularly if you plan to make irregular repayments or pay down the loan faster during certain periods. Many buyers assume they should lock in a fixed interest rate for stability, but holiday home owners often receive irregular income from short-term rentals or make lump sum payments when they have surplus cash. A fixed interest rate home loan limits your ability to make extra repayments without incurring break costs, and if you decide to sell the property within the fixed term, those costs can be substantial.

An offset account linked to a variable rate loan gives you flexibility to park funds from rental income or bonuses and reduce the interest you're charged without locking the money away. If you're using the holiday home for part of the year and renting it out during peak seasons, the rental income can sit in the offset and reduce your interest costs while remaining accessible. A split loan structure, with part fixed and part variable, can work if you want some rate certainty but still need flexibility for extra repayments.

Underestimating the Loan to Value Ratio Impact

Lenders cap the loan to value ratio (LVR) at 80% for most holiday home purchases, which means you'll need at least a 20% deposit plus costs to avoid paying Lenders Mortgage Insurance (LMI). If you borrow above 80%, the LMI premium on an investment property is higher than it would be for an owner-occupied loan, and some lenders won't approve holiday home loans above 90% LVR at all. The deposit requirement is often the biggest hurdle for Castle Hill buyers who have equity in their primary residence but limited cash savings.

Using equity from your Castle Hill property to fund the deposit is common, but it increases the debt against your home and reduces the buffer you have if property values decline. Lenders will reassess the value of your primary residence when you apply for the holiday home loan, and if the market has softened since you last refinanced, your available equity may be lower than you expect. You'll also need to account for stamp duty, legal fees, and building and pest inspections, which can add another 4-5% to the upfront cost.

In our experience, buyers who assume they can borrow 90% and cover costs with a small cash top-up are often surprised by how much lenders require in genuine savings or equity. If you're relying on equity alone, make sure the valuation on your Castle Hill property supports the amount you need before you sign a contract.

Overlooking How Lenders Treat Rental Income

If you plan to rent out the holiday home for part of the year, lenders will only count a portion of that rental income when assessing your application. Most lenders apply a 75-80% shading to rental income, meaning they assume you'll only receive 75-80% of the projected rent after accounting for vacancy periods, maintenance, and management costs. If your holiday home is in a seasonal location where rental demand is high for only a few months, lenders may discount the income further or ignore it entirely if you can't demonstrate consistent rental history.

Consider a scenario where a buyer purchases a coastal property they plan to use themselves during school holidays and rent out for the rest of the year. They project $30,000 in annual rental income based on similar properties in the area. The lender applies an 80% shading, so only $24,000 is counted toward serviceability. Because the property is used personally for several weeks, the lender also questions whether the rental income is sustainable and requests evidence of bookings or a property management agreement. Without that evidence, the rental income is excluded entirely, and the loan application is assessed on the buyer's salary and existing commitments alone. The application is declined because the serviceability falls short.

If you're planning to generate rental income from the holiday home, speak to a broker before you apply. We can help you structure the application to maximise the income lenders will recognise and identify which lenders are more flexible with holiday home assessments.

Ignoring the Tax and Structural Implications

How you hold the holiday home and how you use it will affect your tax position and your ability to claim deductions. If the property is used purely for personal holidays, you can't claim interest, rates, or maintenance as tax deductions. If you rent it out, even occasionally, you can claim a portion of those expenses based on the percentage of time it's rented versus used personally. The loan structure you choose will also affect how much interest you can claim, which is why setting up the loan correctly from the start matters.

Some buyers purchase the holiday home in a family trust or company structure for asset protection or estate planning reasons, but this can limit your loan options and increase the interest rate. Not all lenders offer investment loans to trusts, and those that do often apply higher rates or require personal guarantees from the directors or beneficiaries. If you're buying the property in your personal name, make sure the loan is set up as interest-only if you plan to claim tax deductions, because principal repayments don't reduce your taxable income.

We regularly see buyers who set up the loan as principal and interest because it feels more responsible, only to realise later that switching to interest-only would have saved them thousands in tax each year. The structure you choose depends on your income, your tax position, and whether you plan to sell the property or hold it long-term.

Call one of our team or book an appointment at a time that works for you. We'll help you model the borrowing capacity, compare loan products from lenders across Australia, and structure the finance to suit how you plan to use the property.

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