Refinancing loan term changes to save on interest

Your loan term affects how much interest you pay over the life of your mortgage far more than most borrowers realise.

When you refinance your home loan, you have the opportunity to adjust your loan term alongside accessing a lower interest rate or unlocking equity. Extending your term reduces your monthly repayments and frees up cashflow. Shortening it means higher repayments but substantially reduced interest costs over time. The decision depends on where you are in life and what you need your money to do right now.

How changing your loan term affects total interest paid

Shortening your loan term increases your monthly repayment but cuts years off your mortgage and reduces the total interest you pay. Consider a borrower who refinances a remaining loan amount of $500,000 with 25 years left. If they move to a 20-year term instead, their monthly repayment increases by around $400 depending on current variable rates. Over the life of the loan, they could save more than $100,000 in interest and own their home five years earlier. That extra monthly commitment becomes worthwhile when you calculate what those additional years of interest would have cost.

Extending your loan term works in the opposite direction. If the same borrower extends their term to 30 years, their monthly repayment drops by around $300. They gain immediate breathing room in their budget, but they pay interest for an additional five years. That flexibility comes at a cost, and it makes sense when cashflow today matters more than total interest paid over decades.

A loan health check shows you exactly how different loan terms would affect your repayments and interest costs based on your current mortgage.

When shortening your loan term makes sense

Reducing your loan term works when your income has increased since you first borrowed or when other financial commitments have cleared. In our experience, borrowers approaching their fifties often want to own their home outright before retirement. Refinancing to a shorter term turns that goal into a fixed timeline.

Consider a couple in Kew who refinanced after paying off their car loan and clearing their credit card debt. They had been paying $2,800 monthly on their mortgage with 22 years remaining. With those debts gone, they could afford $3,400 per month. By refinancing to a 15-year term, they locked in a timeline to own their home outright well before retirement. The higher repayment felt manageable because it replaced debt repayments they had already been making.

This approach also works for borrowers who receive an inheritance, annual bonus, or other windfall. You can put that lump sum toward the loan and refinance to a shorter term that reflects your new balance. The combination accelerates your progress substantially.

Extending your loan term to improve monthly cashflow

Extending your loan term reduces your monthly repayment and creates breathing room when your financial priorities shift. This works particularly well for growing families facing higher childcare costs, business owners investing in their company, or property investors preparing to purchase their next asset.

As an example, a borrower in Hawthorn with $620,000 remaining on a 23-year term was paying $3,600 monthly. They wanted to access equity to purchase an investment property but couldn't afford both the existing repayment and a second mortgage. By refinancing their home loan to a 30-year term, their monthly repayment dropped to $3,100. That $500 monthly saving improved their borrowing capacity for the investment loan and made the numbers work across both properties.

This strategy delays ownership but creates opportunities today. The additional interest cost over 30 years is offset by the rental income and capital growth from the investment property. Cashflow takes priority over total interest paid.

Refinancing when your fixed rate period ends

Your loan term resets when you refinance after your fixed rate expires. Many borrowers who fixed during low-rate periods are now facing significantly higher repayments as they revert to variable rates. Adjusting your loan term at this point can offset some of that payment shock.

If your repayments have increased by $800 monthly after coming off a fixed rate, extending your term by five years might reduce that increase to $400. You still pay more than you did during the fixed period, but the adjustment becomes more manageable. Alternatively, if you can absorb the higher repayment, keeping or shortening your term means you continue paying down your mortgage at the same pace despite the rate increase.

This decision affects borrowers across Melbourne's inner east, where property values remain high and loan amounts often exceed $700,000. The difference between a 20-year and 25-year term on a large loan amount can shift monthly repayments by several hundred dollars.

Splitting your loan term across multiple accounts

Some lenders allow you to split your mortgage into separate accounts with different loan terms. You might set up one account with a 15-year term and another with a 25-year term. Your minimum repayment is calculated on the longer term, giving you flexibility, but you actively pay down the shorter-term account faster.

This structure works when your income fluctuates or when you want the option to reduce repayments temporarily without refinancing again. It also suits borrowers who want to pay off their mortgage quickly but need a safety net if circumstances change. During a period of reduced income, you can drop back to the minimum repayment. When income recovers, you resume paying extra into the shorter-term account.

The approach requires careful setup during your refinance process, and not all lenders offer it. Your broker can identify which lenders structure loans this way and whether it suits your situation.

Choosing your loan term based on your stage of life

Your ideal loan term depends on where you are in your career and what you plan to do with your property. Borrowers in their thirties with young families often extend their term to keep repayments low while managing childcare and other costs. Borrowers in their forties and fifties typically shorten their term to own their home before retirement.

Property investors often extend their loan term to maximise tax-deductible interest and keep repayments low, improving cashflow for further purchases. Owner-occupiers saving for renovations or school fees might extend temporarily, then refinance again to a shorter term once those expenses pass.

There is no single correct answer. Your loan term should match your income, your timeline, and what you need your mortgage to do for you right now. When you refinance, you can adjust that term to reflect where you are today rather than where you were when you first borrowed.

If you're considering how a loan term change could improve your financial position when you refinance, call one of our team or book an appointment at a time that works for you.

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