Lower Interest rate

A lower interest rate can reduce your monthly repayment, but that does not automatically mean you are better off. You also need to factor in discharge fees, application costs, valuation fees, government charges, fixed-rate break costs, lender’s mortgage insurance, and whether the new loan term quietly adds years back onto your mortgage.

With the RBA cash rate sitting at 4.35% from May 2026, many Australian borrowers are reviewing their home loans again. But the right question is not simply, “Can I get a lower rate?” It is, “Will refinancing actually leave me financially better off?”

This guide walks through the numbers that matter.

Want to check your own numbers?

Use our refinance savings calculator to estimate your repayment difference, interest saving and break-even point before making a decision.

Why a Lower Interest Rate Is Not Enough

A lower rate can be valuable, but it is only one part of the refinance decision.

For example, saving $200 per month sounds attractive. But if it costs $3,000 to refinance, it takes 15 months just to recover the switching costs. If you sell the property, refinance again, or pay out the loan before then, the refinance may not have delivered a real financial benefit.

There are two types of savings to compare:

• Monthly cash flow savings — how much your repayment reduces each month.
• Total interest savings — how much less interest you may pay over the remaining life of the loan.

The second figure is often more important, especially if your goal is to pay off your home loan faster rather than just reduce the monthly repayment.

What Does It Cost to Refinance a Home Loan in Australia?

Refinance costs vary by lender, state and loan structure. Canstar has previously estimated the average cost of refinancing at about $830, while more recent market analysis suggests a typical range of around $500 to $2,000 depending on the transaction. Some lenders waive certain fees during competitive refinance campaigns, but you should still check the full cost before relying on the advertised rate.

Common refinance costs may include:

• Discharge fee from your current lender
• Application or establishment fee with the new lender
• Valuation fee
• Legal and settlement fees
• Government registration and discharge charges
• Fixed-rate break costs, if applicable
• Lender’s mortgage insurance, if your equity position is too low

The biggest risk is usually a fixed-rate break cost. If you are inside a fixed-rate period, ask your current lender for the break cost in writing before doing anything else.

The Break-Even Formula

The simplest way to check whether refinancing may save you money is to calculate your break-even point.

Break-even point = total refinance costs ÷ monthly repayment savings

For example:

• Total refinance costs: $2,400
• Monthly repayment saving: $200
• Break-even point: 12 months

In this example, you need to keep the new loan for at least 12 months before the refinance starts producing a net saving.

If your break-even point is short and you plan to keep the loan for several years, refinancing may make sense. If your break-even point is long and you may sell or refinance again soon, the benefit becomes less certain.

Example: Same Loan Term vs New 30-Year Term

This is where many borrowers get caught.

If you refinance and reset the loan back to a fresh 30-year term, the repayment may look much cheaper. But that lower repayment may simply be the result of spreading the debt over a longer period.

That can increase the total interest paid over the life of the loan.

A better comparison is usually to calculate the new repayment using your existing remaining loan term. For example, if you have 23 years left, compare the refinance option over 23 years — not 30 years.

This gives you a clearer view of whether the lower rate is genuinely saving money, rather than just stretching the debt further into the future.

When Refinancing Is More Likely To Save You Money

Refinancing is more likely to make sense when:

• Your current interest rate is materially higher than available alternatives
• Your refinance costs are low or partly waived
• You have strong equity, ideally below 80% loan-to-value ratio
• You are not triggering the lender’s mortgage insurance
• You are not facing a large fixed-rate break cost
• You plan to keep the loan beyond the break-even period
• You keep the same remaining loan term or use the refinance to shorten the term
• The new loan gives you better offset, redraw or repayment flexibility

When Refinancing May Not Be Worth It

Refinancing may not be the right move if:

• The rate saving is small
• The upfront costs are high
• You are likely to sell soon
• You are close to paying off the loan
• You would trigger lender’s mortgage insurance
• You are inside a fixed-rate term with a large break cost
• The new loan extends your term and increases total interest

In these cases, it may be better to negotiate with your existing lender, restructure your current loan, or wait until your position improves.

Offset Accounts Can Change the Equation

Sometimes refinancing is not just about the rate.

If your current loan does not have a proper offset account, moving to a loan with offset functionality can improve the overall result — especially if you hold savings, surplus income, or separate cash buffers.

An offset account reduces the balance your interest is calculated on. For example, if you owe $500,000 and hold $40,000 in offset, interest is generally calculated on $460,000 instead of the full $500,000.

For some borrowers, the right offset structure can produce a better long-term outcome than chasing the absolute lowest rate with poor flexibility.

Refinancing should improve your structure, not just your rate

A good refinance review should look at repayments, interest savings, offset structure, equity access and long-term loan strategy.

See How to Pay Off Your Home Loan Faster

Your 6-Step Refinance Savings Checklist

1. Check your current rate, repayment, loan balance and remaining term.
2. Compare the new repayment using the same remaining loan term.
3. Add up all refinance costs, including discharge, application, valuation, legal and government fees.
4. Get any fixed-rate break cost in writing.
5. Divide total costs by monthly savings to calculate your break-even point.
6. Check whether the new loan improves your structure, not just your repayment.

So, Will Refinancing Save You Money?

Refinancing saves you money when the benefits outweigh the costs.

The key is to compare the full picture:

• How much will your repayment reduce?
• How much will refinancing cost?
• How long until you break even?
• Will the new loan term increase or reduce total interest?
• Does the new structure help you manage cash flow, offset savings, or access equity?

If the numbers stack up, refinancing can be a smart way to reduce interest, improve cash flow, access better loan features, or restructure your mortgage around your long-term goals.

If the numbers do not stack up, a lower advertised rate may not be worth the switch.

Want a clear refinance comparison?

James can review your current loan, compare your options and show whether refinancing is likely to save you money after costs — not just on the advertised rate.