Refinancing Your Home Loan: When It Makes Sense and How to Do It Right

Why Refinancing Gets So Much Attention

Australians collectively hold trillions of dollars in mortgage debt. A 0.5% difference in interest rate across a $600,000 loan is worth $3,000 a year. Over a 25-year loan term, that compounds into a genuinely life-changing sum. No wonder refinancing is one of the most Googled financial topics in the country.

But the advertised rate is never the full story. Refinancing has costs, complexity, and gotchas that can eat into — or entirely eliminate — your savings if you don't model the numbers correctly before you switch.

Start with our refinance savings calculator to get a concrete estimate of what switching could actually save you before you call a single broker.

The Break-Even Point: The Number That Actually Matters

Every refinance has upfront costs: discharge fees from your current lender (typically $150–$400), application or establishment fees at the new lender (often $0 to $600), potentially Lenders Mortgage Insurance if your equity has dropped, and legal and valuation fees. Add these up and you might be looking at $1,000 to $3,000 in switching costs.

The question isn't whether you'll save money — it's how long until those savings exceed the switching costs. That's the break-even point. If you'd save $200/month but it costs $2,000 to switch, you break even in 10 months. Stay in the property for longer than that and you come out ahead. Sell in six months and you've lost money on the refinance.

Common situations where refinancing makes sense:

• Your fixed rate period has ended and you've rolled onto a high variable rate
• You haven't reviewed your loan in 2–3+ years and suspect loyalty tax is hurting you
• Your property has grown in value, improving your LVR and unlocking better rates
• You want to consolidate debts into your mortgage at a lower interest rate
• You want features your current loan doesn't have (offset account, redraw, split loans)

Loyalty Tax Is Real

Australian banks routinely offer their sharpest rates to new customers while existing borrowers quietly sit on rates 0.3–0.8% higher. This is sometimes called the loyalty tax, and it costs Australian homeowners an estimated $3+ billion a year in excess interest.

The first step before refinancing externally is calling your current lender and asking for a rate match. Banks often have internal retention rates they won't advertise. If your loan is $500,000 or more, you have real leverage — losing your business costs them far more than a 0.3% rate reduction. Have a competitor's rate quote ready before you call.

What to Compare (Beyond the Interest Rate)

Two loans can have identical interest rates but very different ongoing costs and features:

• Offset accounts: A 100% offset account linked to your mortgage can save you more than a rate reduction, depending on your savings balance. Check our offset account calculator to see the impact.
• Annual fees: A $395/year package fee adds effective interest on smaller loans
• Redraw: Is it free and instant, or does it have delays and fees?
• Repayment flexibility: Can you make extra repayments without penalty?
• Split loans: Can you fix part of the loan while keeping a variable portion?

A loan with a 6.09% rate and a $395 annual fee might genuinely cost more than a 6.14% loan with no fees, depending on your balance. Model the total cost, not just the rate.

The Refinancing Process in Practice

Once you've decided refinancing makes sense, the process typically takes 4–8 weeks:

1. Get your current loan statement and discharge estimate from your existing lender
2. Compare 3–5 lenders using comparison sites like Canstar or Finder, or use a broker
3. Apply to your preferred new lender (they'll pull your credit file, so don't apply to more than 2–3)
4. The new lender orders a property valuation (usually 1–2 weeks)
5. Approval and settlement — your new lender pays out your old loan
6. Set up new repayments and close your old offset/redraw accounts

A mortgage broker can run this entire process for you and costs you nothing — they're paid by the lender. They also have access to lenders who don't appear on comparison sites. That said, brokers have their own incentive structures, so it pays to understand the landscape yourself before the conversation.

Tools Worth Having Before You Talk to Anyone

Know your numbers before you call a broker or bank. Use our mortgage repayment calculator to understand what your new repayments would look like, and our refinance savings calculator to quantify the lifetime saving.

If you want to go deeper on the strategy side, a good Australian personal finance book can sharpen your thinking — browse home loan and property finance titles on Amazon AU.

The Bottom Line

Refinancing is one of the highest-leverage financial moves available to Australian homeowners — but only when the maths supports it. Check the break-even point, factor in all costs, look beyond the headline rate, and call your existing lender first. The five hours you spend doing this properly could be worth more than a month's salary.