When Should You Refinance Your Home Loan?

Refinancing makes sense when the benefit outweighs the cost and friction of switching lenders.

The decision to refinance isn't about chasing the lowest advertised rate or acting on a fixed rate expiry letter. It's about recognising the specific moments when your current loan structure no longer serves your financial strategy. For professionals building wealth through property, those moments usually involve accessing equity for the next purchase, reducing interest costs that compound over time, or consolidating debt to improve cashflow. The timing matters because refinancing too early can trigger break costs, and refinancing too late means you've already paid thousands more than necessary.

Your Fixed Rate Period Has Ended

When your fixed rate period ends, your loan automatically reverts to your lender's standard variable rate, which is typically higher than what new borrowers receive.

Consider a borrower who fixed at 2.1% three years ago on a $600,000 loan. That rate has now expired, and the lender's revert rate sits at 6.8%. A new variable rate with another lender might be 6.2%. On a $550,000 remaining balance, that 0.6% difference costs around $3,300 per year. The refinance process takes four to six weeks, and application fees typically range from $0 to $395 depending on the lender. If you're planning to hold the property for more than a year, the interest saving justifies the effort. If you're selling within six months, it probably doesn't.

Fixed rate expiry is the most common refinancing trigger, but it's also the moment when lenders rely on inertia. They send a letter outlining your options, and most borrowers accept the revert rate without comparing what's available elsewhere. A loan health check at least three months before your fixed term ends gives you time to assess whether your current lender will retain your business with a competitive rate or whether moving makes more sense.

You Need to Access Equity for Investment

Refinancing lets you access equity in your existing property to fund a deposit on the next one, provided your serviceability supports the higher loan amount.

In our experience, this is the scenario where professionals move from one property to multiple. Your home in South Perth has increased in value, and you want to purchase an investment property without selling. If the property is now worth $900,000 and your loan sits at $480,000, you have $420,000 in equity. Most lenders will allow you to borrow up to 80% of the property's value, which is $720,000. Subtracting your current loan leaves $240,000 in usable equity. After holding back for refinancing costs and a buffer, you might access $220,000 to $230,000. That's enough to cover a deposit and purchase costs on a $700,000 investment property.

Serviceability is the constraint. Lenders assess whether your income can support both the increased loan on your home and the new investment loan. Rental income from the investment property is included, but most lenders only count 80% of it. If your income doesn't support the total borrowing, you'll need to reduce the amount you pull from equity, increase your deposit from savings, or adjust the price range of the investment property. The structure matters too. Splitting the loans so that the equity portion is attached to the investment property preserves tax deductibility on that debt.

Variable Rates Have Dropped Significantly

When variable interest rates fall by 0.5% or more below your current rate, refinancing can reduce your interest costs without waiting for a fixed term to end.

Rate movements don't always favour existing customers. Lenders often adjust rates for new borrowers faster than they pass cuts through to their existing book. If your variable rate sits at 6.7% and new borrowers are being offered 6.0%, you're paying roughly $3,850 more per year on a $550,000 loan. That gap compounds. Over five years, assuming no rate changes, the difference is close to $19,250 before accounting for the principal paid down at the lower rate.

Refinancing works when the interest saving exceeds the cost of switching. Application fees, valuation costs, and discharge fees from your current lender typically total $800 to $1,200. Break costs don't apply on variable loans, so the main friction is time and paperwork. Most lenders offer rate matching or retention discounts if you contact them directly, but those discounts are often smaller than what's available by moving. If your current lender offers to match within 0.1% to 0.2%, it's worth considering if you prefer to avoid the refinance process. If the gap is wider, moving usually makes more sense.

Your Loan Lacks the Features You Now Need

Refinancing to access an offset account or redraw facility can improve cashflow and reduce interest paid, particularly if you hold irregular income or want to park savings tax-efficiently.

A borrower on a basic variable loan without an offset is paying interest on the full loan balance, even if they have $40,000 sitting in a savings account earning minimal interest. Moving to a loan with a full offset account means that $40,000 reduces the balance on which interest is calculated. On a 6.2% interest rate, that saves $2,480 per year. If the borrower's marginal tax rate is 37%, earning the same benefit through a savings account would require an interest rate above 9%, which doesn't exist. The offset structure also preserves access to the cash, unlike making extra repayments into a loan without redraw.

Some lenders offer partial offsets, where only a percentage of the balance in the account reduces your interest. Others charge monthly fees for offset accounts that erode the benefit if your savings balance is low. The feature only makes sense if you maintain a meaningful balance in the offset account. If you're disciplined about extra repayments but don't keep cash reserves, a loan with free redraw and no offset fee might suit you just as well.

You're Consolidating Debt to Improve Serviceability

Refinancing to consolidate personal loans, car finance, or credit card debt into your mortgage reduces your monthly commitments and can improve your ability to borrow for investment.

Lenders assess serviceability using your minimum monthly debt commitments. A $30,000 car loan at 8% costs around $730 per month over five years. A $15,000 personal loan adds another $450. Credit cards are assessed at 3% of the limit per month, so a $20,000 limit adds $600 to your commitments even if the balance is zero. Combined, those debts add $1,780 per month to your outgoings, which reduces your borrowing capacity by roughly $350,000 depending on your income and the lender's assessment rate.

Consolidating that $45,000 of debt into your mortgage at 6.2% over 30 years reduces the monthly cost to around $275. Your total debt hasn't changed, but your monthly commitments have dropped by $1,505. That increases your serviceability and frees up cashflow for savings or investment. The trade-off is that you're converting short-term debt into a 30-year loan. If you don't maintain the discipline to pay down the consolidated debt faster than the mortgage term, you'll pay more interest over time even though the rate is lower. This approach works when the consolidation unlocks a specific opportunity, such as purchasing an investment property, not as a way to extend bad debt indefinitely.

A Refinance Application Requires Current Income and Valuation Evidence

Lenders assess refinance applications using your current income, the property's current value, and your existing debt position, not the original loan details.

The process involves providing recent payslips or tax returns, a current valuation of the property, and details of any other debts or commitments. Most lenders order a desktop valuation, which costs around $200 and takes a few days. If the desktop valuation comes in lower than expected, the lender may request a full valuation, which costs $300 to $600 and involves a physical inspection. Valuation outcomes can vary between lenders, so if one values your property at $850,000 and you believe it's worth $900,000, switching to a lender with a different valuation panel might deliver a higher result and increase your usable equity.

Settlement usually takes four to six weeks from application. Your new lender pays out your existing loan on settlement day, and your old lender releases the mortgage over the property. You'll receive a discharge statement showing any final interest or fees owed. If you're refinancing to access equity, the additional funds are typically released on settlement and deposited into your nominated account. Timing matters if you're purchasing an investment property, as the equity needs to be available before you exchange contracts on the new purchase.

Call one of our team or book an appointment at a time that works for you to discuss whether refinancing aligns with your current financial position and property strategy.

Frequently Asked Questions