Your lender gave you a great rate. Three years ago. They haven't updated it since — but they've dropped rates for new customers twice.
That gap between what you're paying and what a new borrower gets for the same product? It has a name. Economists call it the "loyalty tax." The RBA has studied it. ACCC has flagged it. And it could be costing you $4,000–$8,000 a year without you noticing.
Refinancing isn't always the answer. But never checking? That's always the wrong move.
What Refinancing Actually Means
Refinancing is replacing your current home loan with a new one — either with your existing lender (an internal switch) or a different lender entirely.
Think of it like switching energy providers. Same house. Same power. Better deal. Except the stakes are higher — your home loan is probably your largest monthly expense, and even a small rate difference compounds into serious money over time.
You don't need to be in financial trouble to refinance. Most people refinance because their circumstances have improved, their property has grown in value, or the market has simply moved on while their loan hasn't.
Five Signs It Might Be Time to Refinance
Not every homeowner should refinance. But if any of these sound familiar, it's worth running the numbers.
1. You haven't reviewed your rate in 18+ months
Lender pricing changes constantly. If your rate was competitive when you signed, it may not be now. A 0.50% difference on a $700,000 loan is roughly $3,500 a year — or $290 a month you're giving away.
2. Your fixed rate is about to expire
When your fixed period ends, you'll roll onto a variable rate — often the lender's standard variable, which can be significantly higher than what's available in the market. This is one of the most common (and costly) moments homeowners miss. Read: What to do when your fixed rate expires →
3. Your property has grown in value
If your property value has increased and your loan balance has decreased, your LVR has improved. A lower LVR unlocks sharper rates, removes LMI loading, and gives you negotiating power. The rate you accepted at 90% LVR shouldn't be the rate you keep at 75%.
4. Your income has changed significantly
A promotion, a move from registrar to consultant, a partner returning to work — these shift your borrowing profile. Lenders who wouldn't compete for you three years ago may now be offering their best terms.
5. You're paying for features you don't use
An offset account you never fund. A package fee for a credit card you cut up. A "professional package" that costs $395/year and delivers nothing you need. Sometimes refinancing isn't about the rate — it's about stripping out the dead weight.
The Real Cost of Doing Nothing
Here's where the loyalty tax bites hardest. Let's make it concrete.
Meet James and Mel. They bought their home four years ago for $850,000 with a $680,000 loan. At the time, their rate was competitive. They haven't looked at it since.
| Their current loan | What's available today | |
|---|---|---|
| Outstanding balance | $640,000 | $640,000 |
| Interest rate | 6.45% | 5.89% |
| Monthly repayment | $4,012 | $3,790 |
| Annual interest cost | ~$41,300 | ~$37,700 |
The gap: ~$3,600 per year. Over five years, that's $18,000 — enough for a renovation, a family holiday every year, or a chunk off the principal.
And that's a 0.56% difference. Some borrowers are sitting on gaps of 0.80% or more.
James and Mel haven't done anything wrong. They just haven't checked. The loyalty tax isn't a penalty for bad behaviour — it's a cost of not looking.
Based on typical scenarios. Rates and savings vary by lender, loan size, and individual circumstances.
When Refinancing Isn't Worth It
Refinancing isn't free, and it's not always the right move. Here's when to pause.
The costs to factor in
| Cost | Typical range |
|---|---|
| Discharge fee (current lender) | $150–$400 |
| Application/establishment fee (new lender) | $0–$600 |
| Valuation fee | $0–$300 |
| Government fees (mortgage registration/discharge) | $200–$600 (varies by state) |
| Break costs (if on a fixed rate) | Varies — can be $0 to $10,000+ |
Total switching costs typically run $500–$1,500 for variable-rate loans. Fixed-rate loans with time remaining can carry significant break costs — always get the exact figure from your lender before deciding.
The break-even test
Divide your total switching costs by the monthly saving. That tells you how many months until you're ahead.
Example: $1,200 in costs ÷ $220/month saving = 5.5 months to break even.
If the break-even is under 12 months, refinancing almost always makes sense. If it's over 24 months, look more carefully. If it's under 6 months, the question isn't should you — it's why haven't you already.
When to stay put
- Your break costs exceed two years of savings
- You're within 12 months of paying off the loan entirely
- You're about to apply for another loan (a new application can affect serviceability timing)
- Your current lender will match — sometimes a phone call to your existing bank achieves the same result without switching. Read: How to negotiate your home loan rate →
Your Bank Gave You a Great Rate. Three Years Ago.
Here's the part nobody says out loud: your lender already has better rates. They're just not giving them to you.
Most lenders have a "front book" (new customer rates) and a "back book" (existing customer rates). The gap between the two is the loyalty tax. The RBA has repeatedly highlighted this — existing borrowers collectively pay billions more each year than they need to.
This isn't a conspiracy. It's a business model. Lenders know most people won't check. The ones who do check get rewarded. The ones who don't, subsidise everyone else.
That's why an annual review matters more than the rate you started with. The best rate on day one means nothing if it's the worst rate by year three.
Refinancing as a Medico — What Changes
If you're a doctor, dentist, or allied health professional who bought your home during training years, refinancing could unlock more than a rate cut.
Career progression changes your profile. A registrar who bought at $135,000 income and is now a consultant earning $350,000+ is a completely different risk profile. Lenders compete harder for high-income borrowers — and the medico lending policies that helped you buy may now help you restructure.
Your LVR has probably improved. If your property has grown and you've been making repayments, your LVR could have dropped 10–15 points. That shift alone can unlock better pricing tiers, remove LMI loading from your rate, or free up equity for an investment property.
HECS may no longer matter — but check. Under standard bank policies, your HECS still reduces borrowing capacity. Under specialist medico policies, it's excluded. If you originally bought through a lender that counted your HECS, refinancing through a medico-aware broker could meaningfully increase your capacity for the next purchase.
The Wity Borrowing Power Assessment models your current loan against what's available today — across 45+ lenders, including specialist medico policies most borrowers don't know exist. It's not just a rate comparison. It's a full restructure analysis.
Should You Refinance? The Decision Framework
Rather than guessing, run through this:
Step 1 — Know your current position. What's your rate? What's your remaining balance? When does any fixed period expire? What fees does your current loan carry?
Step 2 — Check your property value. A quick market appraisal or online estimate gives you a rough LVR. If it's dropped below 80% since you bought, you're in a stronger negotiating position.
Step 3 — Calculate the gap. Compare your current rate against what's available for your LVR and loan size. If the gap is 0.30% or more, it's worth modelling.
Step 4 — Run the break-even. Total switching costs ÷ monthly saving = months to break even. Under 12 months? Move. Over 24? Think twice.
Step 5 — Consider the full picture. Rate isn't everything. Offset accounts, redraw flexibility, loan portability, split options, cashback offers — sometimes the cheapest rate comes with a loan that doesn't fit your life.
If any step feels unclear, that's exactly where a broker adds value. The Wity refinance service runs all five steps across 45+ lenders in one sitting — so you're comparing the full picture, not just one bank's menu.
What To Do Next
If you haven't reviewed your home loan in the past 18 months, you're probably paying more than you need to. That's not a criticism — it's just how the system works.
Not sure where you stand? Start the Wity questionnaire → and we'll walk you through your options. No pressure, no credit check, just clarity.
If you're stuck on a fixed rate and worried about costs, start here: Understanding break costs on fixed loans →
If you think you might be in mortgage prison — where you're free to leave but can't pass a new lender's assessment for the same loan you're already repaying on time — that's a different problem with specific solutions. Worth reading before you assume the worst.