Do you know when refinancing actually saves you money?

When rate reduction makes financial sense

A lower interest rate only saves you money if the gap between your current rate and what's available in the market is large enough to cover the cost of switching.

Consider a Castle Hill family with $650,000 remaining on their home loan at 6.2%. If they can refinance to a variable rate of 5.7%, that 0.5% difference reduces their monthly repayments by around $210. Over a year, that's $2,520 in cashflow returned to the household. If the cost to refinance is $1,200 in discharge and application fees, the savings begin to accumulate within six months. After that, every dollar saved is a genuine reduction in interest paid.

The size of your loan matters as much as the rate gap. A 0.3% reduction on a $400,000 loan delivers less than half the monthly saving of a 0.5% reduction on a $650,000 loan. That's why the refinance conversation starts with your current balance, not just the rate itself.

How comparison rate helps you assess the real cost

Comparison rate includes the interest rate and most upfront fees, expressed as a single percentage over the life of the loan.

If a lender advertises a rate of 5.6% with a comparison rate of 5.8%, the difference reflects application fees, ongoing account fees, or other charges built into the product. A rate of 5.7% with a comparison rate of 5.71% suggests lower fees. When you're comparing offers, the comparison rate gives you a clearer picture of what you'll actually pay, particularly if one lender has a low headline rate but high establishment costs.

It's not a perfect measure because it assumes you'll hold the loan for 25 years and borrow a standard amount, but it's a useful starting point. If you're planning to sell or refinance again within a few years, upfront fees weigh more heavily than ongoing costs.

Fixed rate refinance and exit costs

Switching out of a fixed rate loan before the term ends usually triggers break costs, which are calculated based on the difference between your fixed rate and the current wholesale rate your lender can earn on the money you're repaying early.

If you fixed at 2.5% and wholesale rates have since risen, your lender isn't losing money by letting you out early, so break costs are often minimal or zero. If you fixed at 4.8% and wholesale rates have since fallen, the lender may charge several thousand dollars to release you. The exact figure depends on how much time remains on your fixed term and how far rates have moved.

In our experience, borrowers leaving a fixed rate in the final six months of the term face lower break costs than those exiting halfway through. If you're locked in at a rate significantly higher than what's available now, it's worth requesting a break cost estimate before assuming the switch isn't viable. Some lenders waive discharge fees if you're refinancing to another product within their own suite, which can reduce the total cost of moving.

What refinancing actually costs

Discharge fees from your current lender typically sit between $300 and $400. Application fees with the new lender range from zero to $600, depending on the product. Settlement fees and valuation costs add another $200 to $400. If you're switching from a fixed rate, factor in any break costs on top of that.

Some lenders offer cashback incentives to offset these expenses, usually between $2,000 and $4,000, paid a few months after settlement. That can bring your net cost down significantly, but cashback is often tied to a product with a slightly higher ongoing rate or stricter conditions around offset accounts and redraw. The cashback might cover your upfront costs, but if the rate is 0.15% higher than a no-cashback alternative, you'll pay more over time unless you plan to refinance again within a few years.

How much you'll actually save on repayments

The monthly saving depends on your loan balance, the rate reduction, and whether you're on principal and interest or interest-only repayments.

A borrower with $500,000 remaining on their mortgage, currently paying 6.1%, would have monthly repayments of approximately $3,300. Refinancing to 5.6% brings that down to around $3,150, a reduction of $150 per month or $1,800 per year. That saving compounds if you keep the new loan for several years, but only if the new rate remains competitive. Variable rates move with the market, so a rate that's strong now may not be in 18 months.

If your priority is reducing monthly repayments to improve cashflow, a rate reduction delivers immediate relief. If your goal is to pay off the loan sooner, you can keep your repayments at the old level and direct the difference toward the principal, which shortens the loan term and reduces total interest paid.

Variable rate refinance and ongoing flexibility

Switching to a variable rate gives you access to offset accounts, unlimited extra repayments, and the ability to redraw without penalty.

An offset account linked to your home loan reduces the interest you pay by offsetting your loan balance with the cash sitting in the account. If you have $50,000 in offset and a $600,000 loan, you're only charged interest on $550,000. That can save you thousands in interest each year without locking the cash away. Redraw lets you access extra repayments you've made, which is helpful if you need funds for renovations or unexpected expenses.

Variable rates also mean you're not locked in if market rates fall further. You can take advantage of rate cuts as they happen, or switch lenders again if a lower rate becomes available. The downside is that your rate can also rise, so the repayment amount isn't fixed. For borrowers in Castle Hill who prefer certainty, splitting the loan between fixed and variable gives you some protection from rate rises while maintaining access to offset and extra repayments on the variable portion.

When switching lenders makes sense for Castle Hill residents

Castle Hill has a high proportion of established families with mortgages taken out several years ago, many of which are now sitting on rates well above current market offerings.

If you refinanced during the low rate period and your fixed term has recently expired, you may have rolled onto a variable rate above 6%. With market rates now sitting closer to 5.5% to 6% depending on your deposit and loan size, switching lenders could return several hundred dollars per month to your household. That makes a noticeable difference in areas like Castle Hill where council rates, school fees, and transport costs are already high.

Local residents with offset accounts that aren't being used effectively can also gain by switching to a lender that offers a genuine offset facility with no monthly account fees. Some older loans include an offset account in name only, charging interest on the full balance regardless of the offset balance. Confirming how your current offset operates is part of any loan health check and should be reviewed before committing to a new lender.

How a mortgage broker structures the refinance process

A mortgage broker compares rates and features across multiple lenders, identifies which products suit your borrowing capacity and loan structure, and manages the application through to settlement.

If you're switching lenders to reduce your rate, the broker requests a discharge authority from your current lender, arranges a valuation if required, and coordinates settlement so there's no gap between the old loan ending and the new one starting. That process typically takes three to five weeks, depending on how quickly the valuation is completed and whether your income or employment documentation requires clarification.

Brokers also assess whether refinancing will affect your borrowing capacity if you're planning to buy an investment property or upgrade in the near future. A lower rate improves your serviceability, which means you can borrow more when the time comes. If your current lender has tightened their assessment policies since you first borrowed, switching to a lender with more flexible criteria can increase your options without waiting for rates to fall further.

Call one of our team or book an appointment at a time that works for you. We'll calculate your potential saving, confirm what the switch will cost, and show you what's available across the lenders we work with.

Frequently Asked Questions