For many Melbourne families, the home that worked five or ten years ago may have started to feel small. Kids get bigger, school runs get longer and working from home calls for a proper study. Upgrading is the logical next step.
It sounds simple enough: sell the property you have and buy a bigger or better one. But the finance can be more complicated. You are juggling two properties, potentially two loans, a sale price you can’t yet confirm and a purchase price you have to commit to.
These issues are particularly relevant in Melbourne right now. Cotality put Melbourne’s median dwelling value at $780,550 in September 2026, down 6.2% over the past year and 7.5% below its March 2022 record high. Changes in property values can affect what you receive for your current home, the equity you have available and the price you need to pay for your next one.
So, before you start looking at homes to upgrade to, it helps to understand what will happen to your existing mortgage and how your next one could be structured.
This article is general information only and does not constitute financial, legal or tax advice. We recommend seeking advice from a qualified accountant and solicitor before making any decisions.
What happens to your existing mortgage when you sell?
Your mortgage doesn’t move automatically from your existing home to your new one.
When you sell, the mortgage secured against your current property will generally be discharged at settlement. The amount you still owe your lender is repaid from the sale proceeds, along with relevant selling and settlement costs. Whatever is left can then contribute towards your next property.
For example, say your home sells for $1.3 million and you still owe $500,000 on the mortgage. That leaves $800,000 before selling costs that can potentially contribute towards the upgrade.
If you buy before selling, however, your existing mortgage is still in place when you need to finance the next property. Depending on your circumstances, bridging finance may be one way to manage that overlap.
How does your equity affect an upgrade?
Equity is the difference between your property’s current value and the amount you still owe against it. If your home is worth $1.3 million and your mortgage balance is $500,000, you have $800,000 in equity.
But total equity and usable equity are different. Usable equity is the portion a lender may allow you to access while keeping your loan within its maximum loan-to-value ratio (LVR). If a lender allows you to borrow up to 80% of your property’s value, a $1.3 million home could support total lending of $1.04 million. With $500,000 already owing, that would leave up to $540,000 in usable equity, subject to your borrowing capacity and the lender’s criteria.
For Melbourne homeowners who have owned their property for several years, equity can be substantial. Cotality's latest Pain & Gain Report found 89% of Melbourne properties resold for a nominal profit in the June 2026 quarter, with the median gain among profitable sales sitting at $278,000.
Of course, a capital gain is not the same as equity. Cotality’s figure measures the difference between a property’s previous and latest sale prices, while your equity also depends on how much of your mortgage you have repaid.
And even substantial usable equity doesn’t tell you how much you can spend on your next home.
Equity and borrowing capacity are different
You can have a decent amount of equity and still find that you can’t borrow enough for the upgrade you have in mind. That’s because a lender also needs to be satisfied that you can afford the repayments on the new debt.
Your borrowing capacity will depend on factors such as your income, living expenses, existing debts, dependants and other financial commitments, as well as the lender’s own servicing criteria.
Higher interest rates can make that calculation more challenging – especially since the Reserve Bank of Australia (RBA) increased the cash rate to 4.60% in September 2026, its highest level since 2011.
Then there is a mortgage serviceability buffer on top of that. The Australian Prudential Regulation Authority (APRA) currently requires regulated banks to assess new home loan borrowers at an interest rate at least three percentage points above the loan’s actual rate. So a bank assessing a mortgage with a 6% interest rate, for instance, would generally need to test whether you could afford it at a rate of at least 9%.
This can create a situation where equity isn’t the constraint – servicing is. You might have $540,000 in usable equity but still be unable to borrow enough to make the upgrade you want.
How does a bridging loan work when upgrading?
If you want to buy before selling, bridging finance can provide short-term funding until the proceeds from your existing home become available.
An important number is your peak debt – generally the highest amount you owe while you own both homes.
Say you still owe $500,000 on your current home and need another $1.4 million to complete your upgrade. Your debt could temporarily reach around $1.9 million when you add your old and new mortgages together, so you need to be sure you can service this total amount.
Once your existing home sells, the proceeds are used to reduce that debt, leaving your ongoing mortgage on the new home.
This is why the expected sale price of your existing property is so important. If you expect to sell for $1.3 million but ultimately receive $1.2 million, you have $100,000 less to reduce your debt.
Bridging loan policies also vary between lenders, including how much you can borrow, how servicing is assessed, how long you have to sell and how repayments are handled during the bridging period.
Should you sell before you buy?
The alternative is to sell your existing home first. The main advantage is certainty. You know your sale price, how much of your mortgage has been repaid and how much money you have available for your next purchase.
It can also mean you avoid carrying two properties at the same time.
But this isn’t always possible if you haven’t found your next home yet. The trade-off is that you may need temporary accommodation while looking for your new home.
Opting to buy first can give you more time to find the right property, but you are committing to the purchase before knowing exactly what your existing home will sell for, so the finance needs to allow for that uncertainty.
Neither sequence suits every upgrader. Your borrowing capacity, usable equity, cash reserves and appetite for carrying additional debt will all influence which approach is appropriate.
Start with the mortgage you want to end up with
It’s easy to begin an upgrade by looking at properties and working backwards from the price tag. A better starting point can be the mortgage you are comfortable carrying once your existing home has sold.
That means looking at your current mortgage balance, usable equity, likely sale proceeds, borrowing capacity and purchasing costs together. If you’re buying first, you also need to understand your potential peak debt and how the finance would work until your existing home sells.
At AXTON Finance, we can model those different scenarios and compare options across our panel of more than 30 lenders. That can help you understand how much you could spend, whether selling or buying first makes sense for your circumstances and what your mortgage could look like once the upgrade is complete.
This article is general information only and does not constitute financial, legal or tax advice. We recommend seeking advice from a qualified accountant and solicitor before making any decisions.
Thinking about upgrading your Melbourne home? Contact the team at AXTON Finance to work through the finance before you start making offers. Call us on 03 9939 7576, email getabetterrate@axtonfinance.com.au or send us a message.
