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The hidden costs of refinancing

A lower rate is only half the equation. Discharge fees, new application costs, and a fresh 30-year term can quietly eat the saving. Here's what to count before you switch.

6 min read·Reviewed 26 June 2026·Ratesniffers Editorial Team

What are the hidden costs of refinancing a home loan?

Refinancing is rarely free, even when the new lender advertises no application fee. The costs that catch people out are the ones the headline rate doesn't show: a discharge or settlement fee from your current lender, a new loan application or valuation fee, government mortgage registration and discharge charges, and break costs if you're leaving a fixed rate early. On top of that, if you stretch the loan back out to a fresh 30-year term, a lower rate can still mean more total interest over the life of the loan.

None of this means refinancing is a bad idea. It means the only number that matters is the saving after every one of these costs is counted, not the gap between the two advertised rates.

Which refinancing fees should you add up?

Before you switch, ask both lenders in writing for every fee. The common ones look small on their own but add up to a real break-even period you need to clear before the new rate pays for itself.

CostWho charges itWhat to watch for
Discharge / settlement feeYour current lenderOften a few hundred dollars to close the existing loan
Application or valuation feeNew lenderMay be waived in a promotion, but confirm it in writing
Mortgage registration + dischargeState governmentSet by your state, payable on both the old and new loan
Fixed-rate break costYour current lenderCan be large if you leave a fixed term early
LMI (again)New lender's insurerMay be re-charged if your equity is still under 20%

Can refinancing to a lower rate still cost you more?

Yes, and it's the trap most borrowers miss. When you refinance you usually reset the loan term back to 30 years. A lower rate on a longer term can lift your total interest paid even though the monthly repayment drops, because you're paying interest for more years. The fix is simple: keep your repayment at the old amount, or set the new loan to the years you had left, so the lower rate shortens the loan instead of just lowering the monthly figure.

The honest test of a refinance is the break-even point: divide the total switching costs by the monthly saving. If you'll move or sell before you clear it, the lower rate may never pay for itself.

When is refinancing genuinely worth it?

Refinancing tends to pay off when the rate gap is meaningful, you plan to keep the loan well past the break-even point, and your equity is strong enough to avoid paying LMI a second time. It can also be worth it for reasons beyond rate, such as consolidating debt or unlocking an offset, but those benefits should be weighed on their own merits, not bundled into a rate comparison.

  • Count every fee from both lenders, in writing, before deciding.
  • Work out the break-even point and compare it to how long you'll keep the loan.
  • Keep your repayment at the old level so the lower rate shortens the loan.
  • Check whether LMI gets charged again if your equity is under 20%.
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The hidden costs of refinancing: frequently asked questions

What are the hidden costs of refinancing a home loan?
Refinancing is rarely free, even when the new lender advertises no application fee. The costs that catch people out are the ones the headline rate doesn't show: a discharge or settlement fee from your current lender, a new loan application or valuation fee, government mortgage registration and discharge charges, and break costs if you're leaving a fixed rate early. On top of that, if you stretch the loan back out to a fresh 30-year term, a lower rate can still mean more total interest over the life of the loan. None of this means refinancing is a bad idea. It means the only number that…
Which refinancing fees should you add up?
Before you switch, ask both lenders in writing for every fee. The common ones look small on their own but add up to a real break-even period you need to clear before the new rate pays for itself.
Can refinancing to a lower rate still cost you more?
Yes, and it's the trap most borrowers miss. When you refinance you usually reset the loan term back to 30 years. A lower rate on a longer term can lift your total interest paid even though the monthly repayment drops, because you're paying interest for more years. The fix is simple: keep your repayment at the old amount, or set the new loan to the years you had left, so the lower rate shortens the loan instead of just lowering the monthly figure.
When is refinancing genuinely worth it?
Refinancing tends to pay off when the rate gap is meaningful, you plan to keep the loan well past the break-even point, and your equity is strong enough to avoid paying LMI a second time. It can also be worth it for reasons beyond rate, such as consolidating debt or unlocking an offset, but those benefits should be weighed on their own merits, not bundled into a rate comparison. Key points: Count every fee from both lenders, in writing, before deciding.; Work out the break-even point and compare it to how long you'll keep the loan.; Keep your repayment at the old level so the lower rate…

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