Refinancing: when switching pays

Refinancing is replacing your current home loan with a different one — usually with a new lender, sometimes with your own (an internal switch, which can still carry a fee). The new loan pays out the old one; from then on you owe the new lender, ideally on better terms. The house doesn't move. Only the debt does.

People switch for a handful of reasons: a lower rate on the same loan; features the old loan lacks, like an offset account or fee-free extra repayments; a rate type that fits better (see Fixed vs variable); or simply because their fixed term is ending and the lender's roll-over rate isn't competitive. All of these are versions of the same idea — the loan you'd choose today isn't the one you're holding.

What makes refinancing worth understanding is that the market is built on inertia. Lenders compete hard for new customers and count on existing ones not looking. That's not a reason for outrage; it's a reason to look.

The cheapest refinance is the one you never do. Moneysmart's switching guide spells out the play: tell your current lender you're planning to switch to a cheaper loan elsewhere — and to keep your business, they may cut your rate on the spot. No fees, no paperwork, no new bank app. The threat only works if it's credible, so arrive with a real competing offer in hand.

Your bargaining position is stronger than it feels. A borrower with solid equity — the slice of the home you own outright — and a clean repayment history is exactly the customer every lender wants, and yours knows it. Moneysmart notes that healthy equity and a good credit score both strengthen your hand.

When you do compare outside offers, compare honestly: use the comparison rate, the single figure that folds most fees in with the interest, rather than the advertised headline (we unpack why in Hidden costs). A shiny rate with heavy fees is a marketing exercise, not a saving.

Refinancing has an exit toll and an entry toll, and the win has to clear both. Leaving, your old lender can charge a discharge fee to close the loan — and if you're inside a fixed term, a break fee, which can be large when rates have moved against your deal. Arriving, the new lender may charge an application fee, and even an internal switch with your own lender can carry a switching fee. Depending on your circumstances and state, government charges — including stamp duty in some cases — can apply too. Moneysmart's guide lists the full set.

The cost that ambushes people is lenders mortgage insurance. LMI protects the lender, not you, and it's charged when your equity is thin — and crucially, it doesn't transfer between lenders. Refinance with low equity and you can be charged LMI again on the new loan, which Moneysmart warns "can increase the cost of switching and outweigh the savings". If your deposit was small or prices have dipped, read our LMI explainer before you fill in anything.

None of these numbers is secret. Ask your current lender for a payout figure and the discharge costs; ask the new one for every up-front fee in writing. The break-even arithmetic below only works with the real numbers in it.

Once you have real numbers, refinancing reduces to one honest question: how many months of savings does it take to repay the cost of moving? Divide the total switching costs by the monthly saving and you have your break-even. If you'll hold the new loan well past that point, the switch pays; if you might sell or refinance again before it, the fees were the point all along — just not for you.

There's one way the arithmetic lies, and it's the industry's favourite: the term reset. Refinance a loan you've been paying down for years into a fresh full-length term and the monthly repayment falls — of course it does, you've spread the debt over more years. It feels like saving and is often the opposite: more months of interest can mean paying more in total, even at a lower rate. Moneysmart's advice is blunt: be firm on the loan length you want, or "you could end up with a longer loan term than the years left to pay off your current mortgage".

The clean comparison keeps the years you have left. Match the new loan's term to your remaining term — that's exactly what the calculator below does — and check the total cost with Moneysmart's free switching calculator, which also shows how long recovering the switching costs takes.

Refinancing is a price-and-features tool. It is not a rescue tool — and using it as one usually makes things worse, because a borrower under stress is refinancing from a weak position, at the exact moment fees hurt most and good offers are scarce.

If the real problem is that repayments have become hard to make, you have a stronger, cheaper right first: a hardship variation. As Moneysmart explains, every lender has a hardship team, and you can ask to change the loan's terms, or pause or reduce repayments while you get back on your feet. Asking early matters — options shrink as arrears grow, and ignoring a default notice shrinks them fastest.

And none of this has to be navigated alone: a financial counsellor — free and confidential via the National Debt Helpline — can help you make the hardship case, deal with the lender, and work out whether refinancing has any part to play at all. Free help first; paperwork second.