Refinancing gets talked about a lot — particularly when interest rates move or when a fixed rate period ends. But the decision to switch lenders is more nuanced than simply chasing a lower rate. Done at the right time for the right reasons, refinancing can save you tens of thousands of dollars over the life of your loan. Done carelessly, it can cost you more than you save. This guide walks through everything you need to know before making the call.
What does refinancing actually mean?
Refinancing means replacing your existing home loan with a new one — either with your current lender or a different one. The new loan pays out the old one, and you begin repayments under the new terms. It's a fresh application process: the new lender will assess your income, expenses, credit history, and the current value of your property.
The core goal of refinancing:
Most borrowers refinance to secure a lower interest rate, but rate isn't the only lever. Refinancing can also be used to access equity, consolidate debt, switch between variable and fixed rates, change loan features, or restructure the loan to better suit a changed financial situation.
The key question is always: does the benefit outweigh the total cost of switching?
Reasons to refinance
Not all refinancing decisions are created equal. Some are driven by clear financial logic; others are more situational. Understanding your primary reason helps you identify the right lender, the right loan structure, and whether now is the right time.
Securing a lower interest rate
The most common driver. If rates have fallen since you took out your loan, or if you've been sitting on a lender's standard variable rate (SVR) for years without reviewing, you may be paying significantly more than necessary. Even a 0.5% reduction on a $600,000 loan saves around $3,000 per year in interest — and more than $50,000 over a 30-year term.
Accessing home equity
If your property has grown in value since purchase, you may have built up usable equity. Refinancing allows you to tap that equity — up to 80% LVR in most cases — to fund a renovation, invest in another property, purchase a vehicle, or consolidate other debts. This is called a cash-out refinance or equity release.
Changing loan structure or features
Your financial situation changes over time. You might want to move from interest-only to principal and interest, switch from variable to fixed (or vice versa), add an offset account, consolidate multiple loans, or remove a borrower from the title following a separation. These structural changes often require a full refinance.
Improved LVR — unlocking better pricing
If your property has increased in value and/or you've paid down your loan significantly, your LVR may now sit in a lower band — potentially below 80%, 70%, or even 60%. Refinancing into a new loan that recognises your improved LVR can unlock materially better interest rates that weren't available to you at the time of your original application.
Fixed rate expiry
When a fixed rate period ends, most borrowers roll onto their lender's standard variable rate — which is rarely the most competitive option available. The period immediately following fixed rate expiry is one of the best times to review and refinance, as you face no break costs and can immediately move to a better deal. This is sometimes called the "loyalty tax" trap.
The real costs of refinancing
Refinancing is not free. Before you switch, you need to understand the full cost — on both sides of the ledger. Many borrowers focus only on the new rate and overlook the fees involved in exiting their old loan and establishing the new one.
| Cost | Typical Amount | Notes |
|---|---|---|
| Discharge fee (exit fee) | $150–$500 | Charged by your existing lender to close the loan and release the mortgage |
| Break cost (fixed rate) | $0–$30,000+ | Only applies if you're breaking out of a fixed rate early. Can be very significant — always get a quote first |
| Application / establishment fee | $0–$700 | Charged by the new lender to set up the loan. Many lenders waive this for refinancers |
| Valuation fee | $0–$600 | The new lender will value the property. Often waived or covered during promotional periods |
| Legal / settlement fee | $150–$900 | Covers the legal work of transferring the mortgage to the new lender |
| Lenders Mortgage Insurance (LMI) | $0–$25,000+ | May apply if you're refinancing above 80% LVR. LMI paid on original loan is not transferable |
| Ongoing fees | $0–$400/year | Some loans carry annual package fees — factor these into the total cost comparison |
Total switching cost example: On a straightforward refinance from a variable rate loan, you might face a discharge fee of $300, a settlement/legal fee of $400, and no valuation fee if the new lender waives it. Total out-of-pocket cost: approximately $700–$1,000. That's the break-even hurdle your rate saving needs to clear — and on most refinances, it's cleared within a few months.
Fixed rate break costs: get the number before you do anything. If you're currently in a fixed rate period, your lender can calculate your break cost on request — and it can be eye-watering. Break costs are calculated based on the difference between your fixed rate and current wholesale rates, multiplied by the remaining term. In a rising rate environment they can be minimal; in a falling rate environment they can run into the tens of thousands. Always confirm this number before proceeding.
How to calculate your break-even point
The break-even point is the number of months it takes for your monthly interest saving to fully offset the total cost of refinancing. It's the most important number in any refinancing decision.
Break-even formula:
Break-Even (months) = Total Switching Costs ÷ Monthly Interest Saving
If it costs you $2,400 to refinance and you save $200 per month in interest, your break-even point is 12 months. After that, every month is pure saving.
Break-even period by savings rate — $700,000 loan, $2,000 total switching cost
Approximate figures for illustration. Your broker can calculate exact savings for your loan balance and remaining term.
As a general rule, if your break-even point is under 18–24 months and you plan to stay in the property beyond that, refinancing is likely worth it. If it's longer than three years — particularly because of high break costs or LMI — the numbers need more careful scrutiny.
When refinancing doesn't make sense
There are circumstances where the impulse to refinance is understandable but the numbers don't support it. Recognising these situations can save you time, money, and a hard credit inquiry on your file.
✓ Refinancing likely makes sense
- Your rate is 0.50% or more above current market rates
- Your fixed rate period is ending within 60–90 days
- You've been on the same loan for 3+ years without reviewing
- Your LVR has improved below a key threshold (80%, 70%, 60%)
- You need features your current loan doesn't offer (offset, redraw)
- You want to access equity for a specific purpose
- Your break-even point is under 18 months
- Your financial situation has improved (income, credit score)
✗ Refinancing probably doesn't make sense
- You're mid-fixed-rate with significant break costs
- The rate difference is less than 0.25%
- You're planning to sell within 12–18 months
- You'll need to pay LMI again on the new loan
- Your income or employment has recently changed
- You have multiple recent credit enquiries on your file
- The break-even period exceeds how long you plan to hold the loan
- Your loan balance is very low (less than $150,000)
How long does refinancing take?
The refinancing process is not instant — understanding the timeline helps you plan, especially if you're working around a fixed rate expiry date or a planned equity release.
Review and comparison
Work with a broker (or research independently) to identify target lenders, compare rates, understand features, and confirm your current loan's exit costs. Gather your documents: payslips, tax returns, bank statements, existing loan statements, ID.
Application submitted
Your broker submits the application to the new lender. The lender orders a property valuation — usually a desktop or drive-by valuation for refinances — and begins their credit assessment. Some lenders offer fast-track assessments for refinancers.
Conditional approval
The lender issues conditional approval — subject to any outstanding documents or conditions. Your broker will manage this stage, responding to any lender requests promptly to keep the process moving.
Formal approval and loan documents
Once fully approved, the lender issues loan documents for signing. You'll need to review and sign the mortgage documents — usually electronically. The new lender arranges settlement with your existing lender to discharge the old loan.
Settlement and switchover
Settlement occurs — the new lender pays out your old loan and the mortgage is transferred. Your new repayments begin on the new loan terms. Most straightforward refinances complete within 4–6 weeks from application to settlement.
Tip for fixed rate expiry: Start the refinancing process at least 6–8 weeks before your fixed rate period ends. This gives you enough time to settle the new loan before you roll onto the SVR. Most lenders won't finalise the new loan until the fixed rate has formally expired, but you can have everything ready to go the moment it does.
Staying with your lender vs. switching
Refinancing doesn't always mean moving to a new lender. In some cases, it's possible to negotiate a better rate with your existing lender — a process sometimes called a rate review, retention review, or internal refinance. This is faster, involves no credit application, and carries no exit or establishment costs.
Staying with your current lender
A rate negotiation with your existing lender. Faster and simpler, but your lender's best offer may still not be the best available in the market.
- No application or credit check required
- No exit or switching fees
- Can complete in days rather than weeks
- Limited by what your lender is prepared to offer
- Best approached with a competing offer in hand
- Doesn't allow you to change loan structure or features significantly
Switching to a new lender
A full refinance to a new lender. More effort and some cost involved, but access to the full market — including products and rates your current lender may not match.
- Access to the full lender market
- Can change loan structure, features, and terms
- Often triggers cashback offers from the new lender
- Requires a full application and assessment
- Exit and establishment fees apply
- Takes 4–6 weeks to complete
The negotiation play: Get formal pre-approval from a competing lender, then present it to your existing lender and ask them to match or beat it. Many lenders have a retention team specifically to respond to this situation. If they match the offer, you save weeks of process and all switching costs. If they don't, you proceed with the new lender knowing you tried. This approach costs nothing and takes a phone call.
Refinancing and your credit score
Every home loan application — including a refinance — results in a hard credit enquiry on your credit file. This is visible to other lenders for five years and can temporarily reduce your credit score. While one enquiry has minimal impact, multiple applications in a short period can raise flags.
Don't shop your application around. Submitting full applications to multiple lenders simultaneously — rather than using a broker who can compare products before lodging — results in multiple credit enquiries on your file at once. This is a red flag for lenders and can reduce your chances of approval. A broker submits a single application to the best-fit lender based on your situation.
Cashback offers — are they worth it?
Many lenders offer refinancing cashback incentives — typically $2,000 to $4,000 — to attract borrowers switching from other institutions. These can look attractive, but they need to be weighed carefully against the total cost and the ongoing rate.
How to evaluate a cashback offer:
A $3,000 cashback from a lender charging 0.30% more than a competitor is not necessarily a good deal. On a $600,000 loan, that 0.30% rate difference costs approximately $1,800 per year in additional interest. Within two years, the cashback is eaten up — and you're worse off every year thereafter.
Always compare the total cost including rate, fees, and any cashback over your expected loan tenure — not just the headline number.
Cashback offers often have conditions too: minimum loan sizes, owner-occupier requirements, and clawback clauses if you refinance again within 12–24 months.
What lenders assess when you refinance
Refinancing is a new loan application. Even if you've been making every repayment on time for years, the new lender will assess your current financial position from scratch. Serviceability rules have tightened significantly in recent years, and some borrowers who could easily get approved years ago may find the process more rigorous today.
| Assessment Area | What Lenders Look At | Common Issues |
|---|---|---|
| Income | Payslips, tax returns, employment stability | Recent job change, casual or contractor income, self-employment |
| Expenses | Bank statements, declared living expenses | High credit card limits, BNPL accounts, regular large outgoings |
| Existing debts | All loans, credit cards, HECS/HELP balance | Multiple liabilities reduce borrowing capacity even if managed well |
| Serviceability buffer | Can you afford repayments at rate + 3%? | Rising rates may mean some borrowers now fail this test |
| LVR | New valuation of your property | Property values falling can push LVR above 80%, triggering LMI |
| Credit history | Repayment history, defaults, enquiries | Any missed payments, defaults, or excessive recent enquiries |
The serviceability buffer trap: APRA requires lenders to assess whether borrowers can afford their loan at the current rate plus 3%. For borrowers who refinanced or purchased at low rates during 2020–2022, this can mean being assessed at rates well above 8–9% even if the actual rate they're applying for is lower. Some borrowers find themselves in a situation where they can comfortably make their current repayments but technically can't "afford" to refinance under today's rules. This is known as mortgage prison.
A note on "mortgage prison"
Mortgage prison describes the situation where a borrower is unable to refinance to a better rate — not because they're in financial distress, but because they can't meet the serviceability test required for a new loan. If your property value has fallen, your income hasn't kept pace with rising rates, or your expenses have increased, you may be trapped with your current lender even if better products exist elsewhere.
If you think you might be in this situation, a broker can assess your options across the full lender panel — including specialist and non-bank lenders who may apply different assessment criteria — before concluding that refinancing isn't possible.
The bottom line
Refinancing is one of the most powerful financial levers available to homeowners — but it needs to be approached with clear eyes. The decision should always start with the numbers: what will it cost, what will you save, and how long until you break even? Once the maths stacks up, the next question is whether your financial position supports a new application.
Key refinancing principles:
Review every 1–2 years — the home loan market moves. What was competitive two years ago may now be well above market.
Always get your break cost first — if you're in a fixed rate period, this number can make or break the decision before you've done anything else.
Calculate the break-even point — if you won't recoup the switching costs before you plan to sell or refinance again, the timing is wrong.
Don't chase cashback at the expense of rate — a lower rate over the life of your loan will almost always outperform a one-time cashback payment.
Try your current lender first — a competing pre-approval in hand is the single most effective negotiating tool you have.
A mortgage broker can run the numbers across the full lender market, identify the best-fit product for your situation, and manage the application process from comparison through to settlement.
