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Australia · FY2025

Refinancing Calculator

Find out how much you save by remortgaging and when you break even on fees.

Last reviewed: 7 November 2025Source: Bank of England — Statistics
Refinancing Calculator · AUFinance & Mortgages

Rates & sources

Standard amortisation formulas used across UK lenders. Interest rates move daily — confirm with your lender or broker.

Source: Bank of England — Statistics — figures refreshed at the start of each tax year.

When to use this calculator

  • Before comparing lenders, brokers, or repayment options.
  • When you want to test how a different deposit, rate, or term changes affordability.
  • When you need a quick estimate before using a formal quote or agreement in principle.

A realistic Australia planning example

Use these sample inputs as a quick scenario test, then change one variable at a time to compare outcomes.

Current Balance (A$)

A$1,400

Current Rate (%)

5%

New Rate (%)

5%

Remaining Term (Years)

25 years

After entering these figures, compare monthly saving, break-even and new payment before deciding which scenario looks strongest.

How to read your results

Monthly Saving

Use this metric to compare scenarios side by side and understand how the key drivers affect the final outcome.

Break-even

Use this metric to compare scenarios side by side and understand how the key drivers affect the final outcome.

New Payment

Use this metric to compare scenarios side by side and understand how the key drivers affect the final outcome.

Common mistakes

  • !Mixing up loan amount and property value, which can distort affordability and LTV.
  • !Using a headline rate but forgetting fees, insurance, taxes, or repayment type.
  • !Testing only one term length instead of comparing the payment and total cost together.

What to do next

  • Run a second scenario with a higher rate or shorter term so you can see the downside clearly.
  • Compare the result with an affordability or overpayment calculator before applying.
  • Use the related guides below to understand trade-offs before you request live quotes.

Frequently asked

Remortgaging typically pays off when the interest saving over the new deals fixed period exceeds the total fees (product fee, valuation, legal, exit charges). A rough rule of thumb is that a rate drop of 0.5% or more on a £150k+ balance covers typical switch costs within the first year of a 2-5 year deal.

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