When NOT to Refinance: Hidden Costs Outweighing Cashback

Introduction

A decision to refinance a home loan should rest on a full calculation of lifetime borrowing costs, not the appeal of a cashback cheque. Australian lenders routinely offer $2,000 to $5,000 as an incentive to switch, yet the hidden charges—break costs on fixed-rate loans, a fresh lenders mortgage insurance premium, government fees, and the interest overhang of a restarted 30-year term—can erase that bonus many times over. For a borrower who fails the APRA serviceability test, a refinance attempt may yield only a credit file dent and a fee liability, with no new loan to show for it. This article sets out the precise circumstances in which a refinance becomes a net destroyer of wealth, using figures drawn from RBA, APRA and ASIC data, and supplies a cost framework to assess whether holding the existing facility is the superior option.

The Cashback Illusion: Marketing Versus Net Cost

Cashback promotions typically deliver $2,000 to $4,000 for loans above $250,000, yet the unavoidable fees of discharging one mortgage and registering another consume a large slice of that sum before any interest savings are realised. A standard discharge involves a lender exit fee (commonly $350), a government mortgage release fee ($175–$200 depending on the state), a title search and registration fee for the new mortgage (roughly $175), plus legal or conveyancing charges that run between $500 and $1,000. A valuation fee of $200–$600 may also be passed on. Taken together, these fixed outlays sit in a range of $1,400 to $2,600 per refinance. When a $2,000 cashback is offered, the net uplift after fees can be zero or even negative before a single interest saving enters the picture. Borrowers who chase cashback without lining up these numbers frequently exit the process with less equity than they started with. ASIC’s MoneySmart calculator identifies average refinancing costs of $700–$1,000 for a loan switch, excluding the larger variables of break costs and LMI, underscoring how thin the margin can be (source: https://moneysmart.gov.au/home-loans/refinancing-home-loans). A cashback-driven refinance is a gamble on an interest-rate spread that may already be priced into the fees.

Break Costs on Fixed-Rate Loans: The Silent Destroyer

When a fixed-rate loan is discharged early, the lender is entitled to recover the economic loss arising from the difference between the contracted rate and the prevailing swap rate for the remaining term. This charge—called a break cost or early repayment adjustment—can dwarf the cashback and the entire interest differential sought by the borrower. The RBA explains that break costs are calculated as the present value of the interest stream the lender forgoes (source: https://www.rba.gov.au/education/resources/explainers/fixed-rate-housing-loans.html). A concrete example illustrates the scale. A borrower with a $500,000 loan fixed at 2.0% per annum for five years, with three years remaining, faces a market rate for an equivalent two-to-three-year term of, say, 1.0%. The annual loss to the lender is 1.0% of $500,000, or $5,000 per year. Discounted at a low rate, the lump-sum break cost is approximately $14,500. If the same borrower receives a $4,000 cashback and saves 0.3 percentage points on a variable rate—delivering about $1,500 in annual interest savings—the cashback and three years of savings total $8,500, still $6,000 short of the break cost. The borrower would need to remain in the new loan for roughly ten years, ignoring the time value of money, just to break even. Conversely, when market rates have risen since the loan was fixed, break costs can be near zero, but that scenario sits outside the “when not to refinance” boundary. In any rate environment where break costs exceed $5,000 on a standard mortgage, a cashback becomes irrelevant. ASIC’s guidance on breaking a fixed loan warns that borrowers should request a break cost quote before lodging any application, as the figure is not capped by regulation (source: https://moneysmart.gov.au/home-loans/breaking-a-fixed-rate-loan). A prudent borrower treats any fixed-rate exit as a line-item that alone can veto the refinance.

Lenders Mortgage Insurance: Paying Twice for No Credit

Refinancing that pushes the loan-to-value ratio above 80% triggers a new lenders mortgage insurance (LMI) premium, a single upfront payment added to the loan balance that provides no refund of the original LMI and diminishes equity instantly. On a $500,000 loan at a 90% LVR, LMI ranges from $12,000 to $18,000, depending on the lender and the insurer’s scale (source: https://moneysmart.gov.au/home-loans/lenders-mortgage-insurance). The original LMI paid when the property was purchased or last refinanced is non-refundable and has no ongoing value; it insures only that specific loan. If a borrower with a paid LMI of $10,000 refinances to access a cashback or a marginally lower rate and the new LVR again exceeds 80%, a fresh $14,000 premium is capitalised into the debt. The cashback of $3,000 covers barely 20% of that cost. In many cases, the property valuation obtained for the refinance is lower than the owner expects, especially if market values have softened, and LMI is applied to a loan the borrower assumed was below the 80% threshold. The APRA requirement that lenders hold more capital for high-LVR loans means the insurer’s premium is almost impossible to avoid once the LVR crosses the line. A homeowner who would trigger a second LMI premium by refinancing should regard the cashback as negligible and preserve the sunk LMI cost of the existing facility.

Resetting the Loan Term: The Interest Trap

Switching lenders often involves accepting a new 30-year term, which resets the amortisation clock and, counter-intuitively, can increase total interest paid even when the headline rate is lower. Consider a borrower five years into a $500,000 loan at 6.0% with 25 years remaining. The remaining interest over those 25 years, assuming no extra repayments, is roughly $467,000. If the borrower refinances to a new 30-year loan at 5.5%—a rate that appears to deliver a saving—the projected interest over the full 30 years becomes $522,000. The lower rate saves $386 per month in the minimum repayment, but it adds $55,000 to the lifetime interest bill because the principal is spread over an extra five years. A $4,000 cashback is swallowed more than thirteen times over. The effect is magnified when the borrower also capitalises the refinancing costs into the new loan, increasing the starting balance. A disciplined comparison requires the new loan term to match the remaining term of the old loan; if the new lender insists on a standard 30-year period, the repayment must be set at a higher amount voluntarily to replicate the original amortisation path, though few borrowers do that. ASIC’s refinancing calculator allows a side-by-side projection of total interest under different loan lengths, and the output frequently shows that a rate reduction of less than 0.5 percentage points, when accompanied by a full term reset, leaves the borrower worse off (source: https://moneysmart.gov.au/home-loans/refinancing-home-loans). The “lower repayment” sales pitch disguises a transfer of wealth from the borrower to the lender over decades.

Credit File Consequences and the APRA Serviceability Wall

Every full credit application lodged for a refinance records a hard enquiry on the borrower’s credit file, reducing the score by between five and ten points per enquiry, according to Equifax scoring models. Multiple applications, even if exploratory, suggest credit stress and can push a score below a tier that later affects pricing or approval for other credit. The damage is permanent for two to five years, regardless of whether the loan settles. Worse, a borrower who applies but fails the lender’s serviceability test is left with the enquiry and no new facility, a net loss. APRA’s prudential standard APS 220 requires lenders to assess serviceability at the higher of the product rate plus a buffer of at least 3 percentage points, or a prescribed floor rate (source: https://www.apra.gov.au/news-and-publications/apra-increases-serviceability-expectation-residential-mortgage-lending). If a borrower’s income has dipped, living expenses have risen, or other debts have been added, the new lender’s assessment may flag an inability to service the loan at 8.5–9.0%, even though the borrower has been comfortably meeting the existing repayment at 6.0%. This “mortgage prison” dynamic traps borrowers in their current loan after they have already incurred application, valuation and legal fees, which can amount to $1,000–$2,000, with no loan approval. A prudent course is to request a serviceability self-assessment from the prospective lender, using the APRA buffer, before paying any third-party costs. When the buffer metric is tight, staying put avoids both the fees and the credit impairment.

Government and Third-Party Charges: The Non-Negotiable Layer

Every refinance in Australia attracts a set of statutory fees that are independent of the lender’s pricing strategy and must be settled in cash or capitalised. The discharge of an existing mortgage through a state land registry costs between $173.70 (NSW) and $200, while registration of a new mortgage incurs a similar fee. Title search fees, typically $30–$50, and settlement attendance charges add a further $100–$300. These amounts are set by state revenue offices and land registries and are not waivable by lenders (see, for example, NSW Land Registry Services: https://www.nswlrs.com.au/land-titling/fees). On a refinance involving a loan switch of $400,000, government charges alone can reach $450, absorbing 15–25 per cent of a $2,000 cashback. When solicitors or conveyancers are engaged to prepare and certify documents, the combined government and legal layer is rarely under $800. In a low-rate environment where the interest saving on a $400,000 loan at a 0.25 percentage point reduction is $1,000 per year, the government-cost layer consumes almost the entire first-year benefit, making the refinance a negative-net-present-value transaction for at least 24 months.

A Decision Framework: When the Arithmetic Votes No

A homeowner should suspend any refinance application until a spreadsheet tallies each of the items below and shows a positive net present value over a realistic horizon, typically five to seven years. The hidden costs that most often flip a refinance from a saving to a loss are:

• Break cost > $3,000 on a fixed-rate loan, or any amount that exceeds the cashback plus two years of projected interest savings.
• New LMI premium triggered because the new LVR exceeds 80%, with no refund of the original LMI.
• Loan term reset from 25 years remaining to a new 30-year term, adding >$10,000 in total interest even at a lower rate.
• Serviceability failure risk where the APRA buffer places the borrower’s after-tax surplus below the lender’s threshold.
• Upfront fees and government charges that eat more than half the cashback before the loan settles.

A threshold example: a borrower with a $500,000 fixed-rate loan at 2.0% (three years remaining), offered $3,000 cashback and a variable rate of 5.5% (no LMI). Break cost estimate $14,500. Total cost of exit including government and legal fees $1,800. Net outlay $16,300. The interest saving of 0.5 percentage points versus a current variable rate of 6.0% provides $2,500 per year. Recouping the $16,300 requires 6.5 years of uninterrupted saving, ignoring the time value of money and assuming rates do not move. If the borrower sells the property or refinances again within that window, the loss is locked in. The arithmetic alone, without any need for speculation, says no.

Conclusion: Resisting the Cashback Pull

Cashback promotions are designed to overcome loss aversion and the inertia of an existing mortgage, but a rational borrower evaluates the total destruction of equity that a refinance can cause. Break costs on fixed-rate loans can run to $15,000, a second LMI premium to $14,000, and a reset 30-year term to $55,000 in extra interest—each figure multiples of the $2,000–$5,000 carrot. APRA’s serviceability buffer walls off the option entirely for households whose financial position has barely changed. Before submitting a discharge authority, a borrower should obtain a break cost quote (if applicable), order a property valuation to check LVR, request a key fact sheet from the new lender that shows total interest over the proposed term, and test serviceability against the 3-percentage-point buffer. Only when the net present value of all cash flows is positive, and the horizon to break-even sits comfortably inside the expected hold period, does the cashback start to look like a genuine subsidy. Information only, not personal financial advice. Consult a licensed mortgage broker.