If your family has outgrown your current place, the loan you used to buy it probably won't work the same way this time around.
You're dealing with a bigger purchase price, different equity levels, and timing that often depends on selling first. Getting the structure wrong can lock you into higher repayments than necessary or leave you scrambling to coordinate settlement dates.
Working Out How Much You Can Borrow This Time
Your borrowing capacity changes between purchases. Lenders assess income, existing debts, and living expenses at the time of application, so even if your salary has increased, other factors like childcare costs or a car loan can reduce what you qualify for. Most families moving into a larger home are carrying a mortgage already, which limits how much lenders will extend unless the sale of your current property is confirmed. If you're planning to buy before you sell, pre-approval becomes more complex because lenders need to see how you'll service two mortgages temporarily or whether the sale proceeds will clear the first loan quickly enough.
Consider a family in Ballina upgrading from a three-bedroom cottage to a four-bedroom house closer to schools. Their household income had increased, but their existing mortgage repayments and two young children meant childcare costs were now part of the lender's expense assessment. They assumed they could borrow based on their deposit and income growth, but the calculation showed a smaller buffer than expected. By working through a pre-approval early and adjusting the budget slightly, they confirmed a loan amount that covered properties in their target area without overextending.
The Deposit Gap When You're Not a First Home Buyer
You're not starting from zero this time, but the deposit requirement for a larger property often surprises upsizers. If your current home has built equity, you can use that to fund part or all of the next deposit. The challenge is access. You can't release equity until settlement, so unless you sell first or use a bridging arrangement, you'll need other funds available for the deposit on the new place. Lenders will consider the equity in your existing property when calculating your loan to value ratio, but only once the sale is confirmed or if you're holding both properties temporarily.
If you're selling first, the timing between settlement on your sale and settlement on your purchase needs to align. Gaps between the two can mean temporary accommodation and extra moving costs. If you're buying first, you'll need to show lenders how the two loans will be serviced until your existing property sells, or arrange bridging finance to cover the shortfall.
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Fixed, Variable, or Split on a Larger Loan Amount
The loan structure that worked on a smaller borrowing amount might not suit a larger one. A variable rate gives you flexibility to make extra repayments and access features like an offset account, which can reduce interest over time. A fixed interest rate locks in your repayment amount, which helps with budgeting when you've just increased your mortgage and want predictability while you adjust to the new property costs. A split loan lets you fix part of the loan and keep the rest variable, so you get some rate certainty without losing all flexibility.
On a larger loan, even a small difference in the interest rate makes a bigger impact on your repayments. Comparing rates across lenders matters more than it did on your first purchase, and the loan features you choose can affect how quickly you build equity again after upsizing. An offset account linked to your variable portion can help you manage surplus income, especially if you've sold your previous home and are holding cash temporarily before offsetting it against the loan.
How Lenders Mortgage Insurance Affects Your Borrowing
If your deposit is less than 20% of the new property's value, you'll likely pay Lenders Mortgage Insurance. LMI protects the lender if you default, and the cost increases as your loan to value ratio goes up. For upsizers, this often happens when the equity from your current home doesn't stretch to a full 20% deposit on the larger property, or when you're buying before selling and haven't accessed your equity yet.
LMI can add thousands to your upfront costs or be rolled into the loan amount, which increases your repayments. Some lenders offer LMI waivers for specific professions or allow you to borrow above 80% LVR with reduced premiums if you meet certain criteria. If you're close to the 80% threshold, adjusting your purchase price or increasing your deposit slightly can sometimes help you avoid LMI altogether. In Northern NSW, where property values vary significantly between coastal towns like Byron Bay and inland areas like Lismore or Casino, the size of your deposit relative to the purchase price can shift depending on where you're buying.
Timing the Sale and Purchase Without Bridging Finance
Most families prefer to avoid bridging finance if they can. It's a short-term loan that covers the gap between buying your next home and selling your current one, and it comes with higher interest rates and additional fees. The alternative is to sell first, which gives you certainty on your funds but often means moving twice or negotiating a longer settlement to align with your next purchase.
If you're buying and selling in the same market, a long settlement on your sale can give you time to find the right property and coordinate dates. Some buyers include a clause in their purchase contract that makes the sale conditional on selling their existing home, though not all sellers will accept that condition, especially in a strong market. Working with a mortgage broker can help you structure the finance to suit whichever sequence works for your situation, whether that's a standard loan with delayed settlement, a bridging arrangement, or accessing equity without selling immediately.
Portability and Refinancing When You Upsize
If your current loan has a portable feature, you may be able to transfer it to your new property without refinancing. This can save on discharge fees and application costs, and it's useful if your existing interest rate is lower than what's currently available. Not all loans are portable, and even if yours is, the lender will reassess your borrowing capacity and the new property's value before approving the transfer.
Refinancing instead of porting your loan gives you the chance to compare current home loan rates and switch to a product with features that suit your new situation. If your original loan didn't include an offset account or flexible repayment options, refinancing when you upsize is a natural time to access those benefits. Keep in mind that refinancing involves application fees, valuation costs, and potentially break costs if you're exiting a fixed rate early.
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Frequently Asked Questions
How does my borrowing capacity change when I'm upsizing?
Lenders reassess your income, debts, and expenses at the time of application. If you're still carrying your existing mortgage, that affects how much you can borrow unless the sale is confirmed. Changes like childcare costs or new debts can reduce your capacity even if your income has grown.
Can I use the equity in my current home as a deposit?
Yes, but you can't access that equity until your property sells or you arrange to hold both properties temporarily. Lenders will consider the equity when calculating your loan to value ratio, but you'll need other funds or a bridging arrangement to cover the deposit before settlement on your sale.
Do I need to pay Lenders Mortgage Insurance if I'm upsizing?
You'll pay LMI if your deposit is less than 20% of the new property's value. This can happen if your equity doesn't stretch to a full 20% or if you're buying before selling. The cost increases as your LVR goes up and can be added to your loan or paid upfront.
Should I fix or keep my rate variable on a larger loan?
A variable rate gives you flexibility and access to features like offset accounts, while a fixed rate locks in repayments for budgeting certainty. A split loan lets you do both. On a larger loan amount, your choice affects how much interest you pay and how quickly you can build equity.
What is bridging finance and can I avoid it?
Bridging finance is a short-term loan that covers the gap between buying your next home and selling your current one. It has higher interest rates and fees. You can avoid it by selling first, negotiating longer settlement terms, or using equity without needing to bridge.
