This refinancing guide shows Australian homeowners exactly when and how to switch mortgage lenders in 2026. Banks rely on mortgage loyalty, and the difference between the best new-customer rate and the average existing-customer rate is currently 0.4 to 0.8%. On an $800,000 loan that translates to $3,200 to $6,400 per year in unnecessary interest. Here is how to know when to refinance and how to execute the switch efficiently.
The Loyalty Tax: How Much Are You Overpaying?
If you have not refinanced or renegotiated in the last 2 years, you are almost certainly paying above the market rate. The RBA interest rate statistics on the Interest Rate Gap (difference between new and existing borrower rates) shows Australian borrowers on average pay 0.5% more than they would if they switched today.
On an $800,000 loan at 6.5% versus 6.0%, that is $4,000 per year in extra interest. Over a typical 5-year period before the next refinance, you are paying $20,000 more than necessary. The loyalty tax is real and substantial.
Major banks set new-customer rates aggressively to win market share, then quietly increase existing customer rates over time. Most borrowers never notice the gradual drift upward until they compare rates again years later.
When Refinancing Makes Sense
Not every mortgage situation warrants the effort of refinancing, but these scenarios almost always justify a switch:
- Your rate is 0.3% or more above the best comparable market rate (same loan-to-value ratio, same loan type). At 0.3% on a $600,000 loan you save $1,800 annually, covering typical refinancing costs in 12 to 18 months.
- You have more than 20% equity and have not had your loan repriced in 2 years. Lenders offer their best rates to borrowers with strong equity positions, typically LVR under 80%.
- Your circumstances have improved (higher income, lower debt, improved credit score) and you now qualify for premium-tier rates that were not available when you first borrowed.
- You want to consolidate debts into your mortgage at a lower interest rate. Credit card debt at 20% or personal loans at 12% can be refinanced into mortgage debt at 6%, saving thousands in interest.
- You want to access equity for investment (equity release refinance). Property investors often refinance to pull equity from one property to fund deposits on additional investment properties.
- You want to switch from variable to fixed (or vice versa) based on the rate outlook. If you expect rates to rise, locking in a fixed rate protects you. If rates are falling, switching to variable lets you benefit.
Refinancing Guide: When Not to Switch
Refinancing is not always the right move. Avoid refinancing in these situations:
- You are in a fixed rate period with significant break costs. Fixed-rate loans often carry early exit fees (break costs) that can be $5,000 to $20,000 depending on remaining term and rate movements. Calculate break costs before proceeding.
- You plan to sell the property within 12 months. The break-even point on refinancing costs versus savings is typically 6 to 12 months. If you are selling soon, the savings will not materialize.
- Your loan balance is under $200,000. Application fees, valuation fees, and discharge fees are fixed costs. On small loans they represent a higher proportion of potential savings, extending break-even timelines.
- You have recent credit issues (missed payments, defaults, high debt levels) that would not support a new application. Lenders assess current serviceability and credit history. If your financial position has deteriorated, you may not qualify for better rates.
Refinancing Savings Calculator
Use this table to estimate your annual savings and break-even period. Assumes typical $2,000 in refinancing fees (application fee, valuation, discharge fee).
| Loan Amount | Current Rate | New Rate | Annual Saving | Break-Even (with $2k fees) |
|---|---|---|---|---|
| $600,000 | 6.5% | 6.0% | $3,000 | 8 months |
| $800,000 | 6.5% | 6.0% | $4,000 | 6 months |
| $1,000,000 | 6.5% | 6.0% | $5,000 | 5 months |
| $1,200,000 | 6.5% | 6.0% | $6,000 | 4 months |
Even a 0.5% rate reduction delivers substantial savings over the life of the loan. On an $800,000 mortgage over 30 years, a 0.5% reduction saves approximately $80,000 in total interest.
Step-by-Step Refinancing Process
Follow this refinancing guide process to switch lenders efficiently:
Step 1: Get your current loan details. Retrieve your current interest rate, outstanding loan balance, any fixed-rate expiry dates, and discharge fees from your existing lender. Most lenders provide this in online banking or via a phone call to customer service.
Step 2: Check what rate you qualify for. Use a mortgage broker (free service, paid by lenders) or compare rates online via bank websites. Brokers have access to lender rate sheets and can identify the lowest rate for your specific situation (LVR, loan amount, property type).
Step 3: Calculate break-even. Add up all refinancing costs (application fee $300 to $600, valuation $200 to $400, discharge fee from old lender $300 to $500) and divide by your monthly interest saving. If total fees are $2,000 and you save $400 per month, break-even is 5 months.
Step 4: Apply with the new lender. Submit your application with payslips, tax returns, and bank statements. Most lenders require 2 years of tax returns for self-employed borrowers and 2 to 3 recent payslips for employees. The new lender will conduct a valuation (they arrange and pay for this).
Step 5: New lender arranges discharge of old loan. Once your application is approved, the new lender’s solicitor contacts your existing lender to arrange discharge. This process typically takes 2 to 4 weeks. You do not need to coordinate this, the lenders handle it directly.
Step 6: Settlement and rate switch. On settlement day, the new lender pays out your old loan in full and your mortgage switches to the new lender at the new rate. Your first repayment under the new loan begins approximately one month after settlement.
Can I Negotiate a Better Rate With My Existing Bank?
Yes, and this is often faster than a full refinance. Call your bank’s retention team (not the general customer service line) and tell them you have received a lower rate offer from a competitor. Ask what rate they can offer to retain your business.
Banks have retention teams specifically tasked with keeping profitable customers. If you have a good repayment history and strong equity, they will often match or come close to competitor rates. This avoids application fees, valuations, and the time required for a full refinance.
If your bank will not negotiate meaningfully (within 0.1 to 0.2% of the best market rate), proceed with the refinance. Loyalty without reward is expensive.
Refinancing in 2026: Rate Outlook
The mortgage refinancing regulations require lenders to assess your ability to service the loan at current rates plus a buffer (typically 3%). As we move through 2026, the RBA rate decisions will determine whether variable rates rise, fall, or hold steady.
If you expect rates to fall, a variable loan allows you to benefit immediately from rate cuts. If you expect rates to rise or remain elevated, locking in a fixed rate (1 to 5 years) provides certainty and protection.
Many borrowers use a split loan structure (part fixed, part variable) to balance certainty with flexibility. For example, fix 50% of your loan at 5.8% for 3 years, keep 50% variable at 6.2% to take advantage of future rate cuts.
Final Checklist: Is Refinancing Right for You?
Before committing to a refinance, confirm:
- Your rate is at least 0.3% above the best available market rate for your LVR and loan type
- You plan to keep the property for at least another 12 months
- You have checked break costs if you are in a fixed-rate period
- Your financial position supports a new loan application (stable income, manageable debt levels, clean credit history)
- You have compared at least 3 lenders or used a broker to access wholesale rates
If you are still unsure should I refinance my mortgage, use that decision tool for a personalized assessment.
Refinancing is one of the highest-return financial decisions Australian homeowners can make. A 0.5% rate reduction on an $800,000 loan saves $4,000 per year, every year, until the next refinance. Treat your mortgage like any other major expense and review it every 2 years to ensure you are not paying the loyalty tax.
Related Posts
Further Reading
Find your next property with Collings
Track suburbs, get matched to on-market and off-market listings, and manage your whole property search in one place. Access the Collings property portal.
