Mortgage Refinance Calculator Australia (2026–27)
Calculate Australian home loan refinancing savings, monthly repayment reductions, lender switching fees, bank cashback rebates, and break-even timelines.
1. Current & New Loan Interest Rates
2. Fees, Cashback & Term
$277 / mo
Saves $3,319 per year in home loan interest!
Net Lifetime Refinance Benefit
$83,781
Includes total rate reduction savings plus $2,000 cashback minus fees.
Refinance Cost Break-Even Period
Immediate (Covered by Cashback)
Time required to recover switching costs from monthly interest savings.
Mortgage Refinancing Repayment Comparison
Australian Home Loan Refinancing Overview (2026–27)
Refinancing your home loan involves switching your existing mortgage to a new loan product—either with your current bank or a competing lender—to secure a lower interest rate, access cash equity, or utilize better loan features like offset accounts.
Even a minor 0.50% interest rate reduction on a $600,000 home loan saves over $2,200 per year in interest charges, making regular refinancing reviews an essential financial habit for Australian homeowners.
Interest Rate Reduction & Break-Even Savings Matrix
The table below shows monthly savings and break-even periods across different interest rate drops on a $600,000 loan over 25 years:
| Interest Rate Reduction | Monthly Repayment Savings | Annual Interest Saved | Break-Even Period ($1.2k Fees) |
|---|---|---|---|
| 0.25% Rate Drop | ~$92 / month | ~$1,104 / year | 13 Months (Without Cashback) |
| 0.50% Rate Drop | ~$184 / month | ~$2,208 / year | 6.5 Months (Without Cashback) |
| 0.75% Rate Drop | ~$275 / month | ~$3,300 / year | 4.3 Months (Without Cashback) |
How to Calculate Refinance Savings: 5 Steps
Follow these steps to evaluate lender offers and calculate your net refinancing gain.
- 1
Enter Current Loan Balance & Rate
Input your existing mortgage balance, current interest rate, and remaining term.
- 2
Input New Interest Rate Offer
Enter the new target interest rate offered by competing Australian lenders.
- 3
Include Switching Costs & Bank Cashback
Add estimated discharge fees ($300) and promotional bank cashback rebates ($2,000).
- 4
Calculate Break-Even Timeline
Evaluate how quickly monthly interest savings recover upfront switching fees.
- 5
Submit Formal Refinance Application
Provide payslips and bank statements to secure unconditional lender approval.
Home Loan Refinancing Compliance Checklist
Gather these documents before submitting your loan switching application.
3 Months Payslips & Tax Notices
Gather recent income records to satisfy APRA 3% serviceability buffer testing.
Current Home Loan Statement
Provide recent mortgage statements showing clean repayment history.
Property Valuation Assessment
Ensure property equity confirms LVR is below 80% to avoid new LMI costs.
5-Year Refinance & Discharge Records
Retain discharge statements for tax records if refinancing an investment loan.
Common Refinancing Errors & Fee Pitfalls
Avoid these frequent mistakes when switching home loan providers.
Refinancing to a lower rate while extending the loan term back to 30 years
Resetting a 23-year remaining loan back to 30 years lowers monthly payments but increases total interest paid over the life of the mortgage.
Chasing a cashback offer with a higher ongoing interest rate
A $3,000 cashback rebate is quickly erased if the new loan interest rate is 0.35% higher than competing market rates.
Refinancing when property value drops (LVR > 80%)
Refinancing with an LVR above 80% forces you to pay Lenders Mortgage Insurance (LMI) a second time.
Forgetting break fees when refinancing out of a fixed rate loan
Refinancing early out of a fixed rate contract can trigger thousands of dollars in lender economic break costs.
Disclaimer: This calculator is provided for general informational, educational, and refinancing savings estimation purposes only. Calculations are based on standard mathematical compound interest formulas, monthly P&I amortisation schedules, lender switching fees, and RBA rate settings for 2026–27. These figures represent projections and do not constitute formal lending, financial, or mortgage broking advice. Consult a licensed mortgage broker or financial advisor (AFSL) before refinancing your home loan.
Charlotte Smith
Senior Personal Finance & Taxation Specialist at AussieSpot
Charlotte Smith is the lead personal finance advisor and mortgage specialist at AussieSpot. Charlotte has over 12 years of experience helping Australian home buyers and investors optimize loan structures, reduce mortgage interest, and achieve financial independence.
Frequently Asked Questions (FAQ)
How much does it cost to refinance a home loan in Australia?
Standard refinancing costs include discharge fees from your old lender ($200–$400), application/upfront fees from the new lender ($0–$600), and government mortgage registration fees (~$150–$200). Total costs typically range between $600 and $1,200.
What is a refinancing break-even period?
The break-even period is the number of months required for your monthly interest savings to exceed your total upfront switching costs. If switching costs are $1,200 and monthly savings are $300, your break-even period is 4 months.
Will refinancing reset my 30-year home loan term?
Lenders default to a new 30-year term upon refinancing unless you explicitly request a remaining term match (e.g. 23 years). Resetting to 30 years lowers monthly payments but increases lifetime interest unless extra repayments are maintained.
What is a refinance cashback offer?
Cashback offers are promotional cash rebates ($2,000 to $4,000) paid by lenders upon loan settlement to offset refinancing switching costs and attract new borrowers.
Can I refinance if my LVR is above 80%?
Yes, but refinancing above 80% LVR requires paying Lenders Mortgage Insurance (LMI) again with the new bank unless you qualify for professional LMI waivers or government guarantee schemes.