Understanding your borrowing capacity when upgrading
Your ability to borrow when purchasing a larger home depends on your income, existing debts, and the equity available in your current property. Lenders assess whether you can service a new loan at a rate at least 3.0 percentage points above the product rate, even if you plan to sell your current home before settlement.
Consider a family with a household income of $145,000 and a mortgage balance of $420,000 on a property now valued at $780,000. The equity available is $360,000 before accounting for selling costs. If they intend to purchase a property at $950,000, the new loan amount after selling costs and a deposit transfer would be around $620,000. Lenders will assess serviceability on the higher of the existing and proposed loan amounts during any bridging period. If the purchase is conditional on sale, some lenders will assess only the new loan, provided the sale contract is unconditional before settlement.
Your borrowing capacity is also affected by any outstanding personal loans, car finance, or credit card limits. Even if the balances are low, lenders calculate serviceability based on the full credit limit, not the amount owing. Reducing limits or consolidating debts before applying can improve your position.
Should you sell first or buy first
Selling your current home before purchasing gives you certainty about your deposit and borrowing position, but limits your flexibility if you need to move quickly or face a competitive market. Buying first allows you to secure the right property without timing pressure, but requires bridging finance or a larger loan until your current home sells.
Bridging finance allows you to hold both properties temporarily. Interest accrues on both loans, and lenders require confirmation that your current property is listed for sale with a realistic asking price. Most bridging arrangements are structured with an end date of six to twelve months, during which time you must settle the sale. This option works when serviceability can support both loans simultaneously, which depends on rental income from your current property or sufficient household income to cover both repayments.
If bridging finance is not suitable, a conditional purchase allows you to exchange contracts on the new property with a clause requiring sale of your current home. The condition typically allows 30 to 90 days, though sellers in high-demand areas may not accept this term. Where the purchase is subject to sale, your loan application can proceed once the sale contract is unconditional.
Choosing between variable, fixed or split rate structures
A variable rate loan provides flexibility to make additional repayments without penalty and allows access to offset accounts, which reduce interest on the outstanding balance. This structure suits borrowers who expect to make lump sum repayments or who want the ability to redraw funds if circumstances change.
A fixed rate provides certainty over repayments for a set term, usually between one and five years. During the fixed period, you are protected from rate increases, but you may face break costs if you repay the loan early or if rates fall significantly. Most fixed rate products limit additional repayments to a set amount each year, typically $10,000 to $30,000 depending on the lender.
A split rate structure divides your loan between a variable portion and a fixed portion. For a family borrowing $650,000, a split of $400,000 variable and $250,000 fixed allows partial rate protection while maintaining access to an offset account and repayment flexibility on the larger portion. This approach balances certainty and adaptability, particularly during periods of rate volatility.
How loan to value ratio affects your application
The loan to value ratio is calculated by dividing the loan amount by the property value. An LVR above 80 per cent typically requires Lenders Mortgage Insurance, which protects the lender if you default but adds a cost borne by you as the borrower. The premium increases as the LVR rises and is calculated on a sliding scale.
If you are upgrading from a property with sufficient equity, your LVR will often fall below 80 per cent, avoiding LMI. Using the earlier example, a family with $360,000 in equity purchasing at $950,000 would have an LVR of approximately 65 per cent after selling costs, assuming no LMI applies. Where equity is limited or the purchase price is higher, keeping your LVR below 80 per cent may require a larger deposit or a lower purchase price.
Lenders also apply higher risk weights to loans with higher LVRs under the prudential framework, which can affect pricing. Some lenders offer tiered interest rate discounts based on LVR bands, with the lowest rates available to borrowers at 70 per cent LVR or below. Understanding where your LVR sits allows you to structure your deposit and loan amount to access the most suitable product.
Structuring your loan for future flexibility
When purchasing a larger home, your loan structure should account for changes in income, future renovations, and the possibility of converting the property to an investment if you move again. Portability allows you to transfer your loan to a new property without refinancing, which can be useful if you plan to upgrade again within a few years.
An offset account linked to your home loan reduces the interest charged on your loan balance without requiring you to make additional repayments into the loan itself. Funds in the offset remain accessible, which provides a buffer for irregular expenses or periods of reduced income. For families with variable household costs, this structure maintains liquidity while reducing interest over time.
If you anticipate renovations or extensions after purchasing, consider a loan product that allows redraws or has a pre-approved increase facility. Some lenders offer construction loan features within a standard home loan package, allowing you to draw down additional funds for building work without a separate application. Confirming these features during the initial application avoids the need to refinance or apply for a second loan later.
Timing your application and pre-approval
A home loan pre-approval confirms how much you can borrow and provides certainty when making an offer. Pre-approval is typically valid for three to six months, depending on the lender, and is subject to a formal valuation and verification of your financial position at the time of purchase.
Applying for pre-approval before listing your current home allows you to understand your budget and move quickly once a suitable property becomes available. In areas where stock is limited or competition is strong, having pre-approval in place reduces the time between offer and exchange, which can be a deciding factor for vendors choosing between multiple buyers.
Pre-approval is not a guarantee of final approval. Lenders will reassess your income, debts, and the property valuation before settlement. Any changes to your employment, credit position, or deposit source between pre-approval and formal application must be disclosed. Maintaining stable financial circumstances during this period reduces the risk of approval being withdrawn.
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Frequently Asked Questions
How much can I borrow when upgrading to a larger home?
Your borrowing capacity depends on your household income, existing debts, and the equity in your current property. Lenders assess serviceability at a rate at least 3.0 percentage points above the product rate. If you are bridging between properties, lenders may assess both loans simultaneously until your current home sells.
What is the difference between buying first and selling first?
Selling first provides certainty about your deposit and borrowing position, but limits flexibility in a competitive market. Buying first requires bridging finance or a conditional contract, allowing you to secure the right property without timing pressure. The right approach depends on your serviceability and whether you can support both loans temporarily.
Do I need to pay Lenders Mortgage Insurance when upgrading?
LMI is typically required when your loan to value ratio exceeds 80 per cent. If you have sufficient equity in your current property, your LVR on the new purchase may fall below this threshold, avoiding the premium. The LVR is calculated by dividing the new loan amount by the property value.
Should I choose a variable, fixed or split rate loan?
A variable rate offers flexibility and access to offset accounts. A fixed rate provides repayment certainty for a set term but limits additional repayments and may incur break costs if repaid early. A split rate balances both, allowing partial rate protection while maintaining flexibility on the variable portion.
How long does home loan pre-approval last?
Pre-approval is typically valid for three to six months, depending on the lender. It confirms your borrowing capacity and is subject to a formal valuation and verification of your financial position at the time of purchase. Any changes to your income, debts or employment must be disclosed before final approval.
