Refinancing 101: When and How to Switch

Refinancing is the process of replacing your existing home loan with a new one — either with your current lender or a different one. Around the world, millions of borrowers refinance every year, often saving significant amounts on interest and monthly repayments. It is one of the most powerful financial moves a homeowner can make, yet many people stick with their original loan for years longer than they should.

When you refinance, your new lender pays out the balance of your old loan, and you begin making repayments on the new loan under its terms. The new loan may have a lower interest rate, different features (such as an offset account or redraw facility), or a different loan structure altogether. You might switch from a variable rate to a fixed rate, or vice versa, depending on your circumstances and market conditions.

It is worth noting that refinancing does not mean you are starting your loan from scratch. If you have been paying down your mortgage for several years, the amount you owe has decreased, and your new loan will be based on the remaining balance. However, if you extend the loan term back to 30 years, you will end up paying more interest over the life of the loan even if the rate is lower — so term length is an important consideration.

Refinancing can also be an opportunity to consolidate debts, access equity for renovations, or restructure your loan to better match your current life stage. Whether you are a first-time refinancer or have done it before, understanding the process thoroughly will help you make the best decision for your financial future.

Knowing when to refinance is just as important as knowing how. The most obvious trigger is a significant gap between your current interest rate and what is available in the market. If your rate is 0.50% or more above what new borrowers are being offered, you could be leaving thousands of dollars on the table every year. Lenders often reserve their best rates for new customers, which means loyal borrowers can end up paying what the industry calls a "loyalty tax."

Another clear sign is when your financial circumstances have changed. Perhaps your income has increased, giving you access to better loan products. Maybe you have built up significant equity in your home, which could help you avoid Lenders Mortgage Insurance on a new loan or unlock better rates. Life events like a partner moving in, receiving an inheritance, or paying off other debts can all change the equation.

• Your rate is 0.50% or more above current market rates for similar products
• Your fixed-rate term is about to expire and you want to lock in a better deal
• You need access to features your current loan does not offer, such as an offset account
• Your property has increased in value, improving your loan-to-value ratio (LVR)
• You want to consolidate higher-interest debts like credit cards or personal loans
• Your current lender has poor customer service or limited digital tools

Changes in the broader market can also signal a good time to refinance. When your country's central bank — whether it is the Federal Reserve, the Bank of England, the RBA, the Bank of Canada, or the RBNZ — cuts its benchmark rate, lenders often introduce competitive new products to attract refinancers. Conversely, if rates are rising and you are on a variable rate, locking in a fixed rate through refinancing could protect you from further increases.

Do not overlook the emotional and practical signs either. If you dread calling your lender because of long hold times, cannot manage your loan through a decent app, or feel like your lender does not value your business, these are all valid reasons to explore other options. A home loan is a 25-to-30-year commitment — you deserve a lender that meets your needs.

The potential savings from refinancing can be substantial, and understanding the numbers will help you decide whether it is worth the effort. Even a seemingly small rate reduction can translate into thousands of dollars over the life of a loan. On a $500,000 loan over 30 years, a reduction of just 0.50% in your interest rate could save you approximately $55,000 in total interest and reduce your monthly repayment by around $150.

These figures assume you maintain the same loan term when you refinance. However, if you have already been paying your loan for several years, you have the option of keeping your repayments at the same level while benefiting from the lower rate. This effectively shortens your loan term and can save you even more in interest over the life of the loan.

For example, if you are five years into a 30-year loan and you refinance to a lower rate but keep making the same repayments, you might shave three to five years off your loan term. That is three to five fewer years of interest payments, which can amount to tens of thousands of dollars in additional savings beyond what the rate cut alone would deliver.

Keep in mind that savings calculations should always factor in the costs of refinancing, including discharge fees, application fees, and any government charges. We cover these in detail in the costs section below. As a general rule, if your potential savings over two to three years exceed the total cost of switching, refinancing is likely worthwhile. Use our borrowing power calculator to model different scenarios based on your current situation.

The refinancing process is more straightforward than most people expect, especially with digital lenders and brokers streamlining the experience. From start to finish, a typical refinance takes between two and six weeks, though timelines vary by country and lender. Understanding each step will help you prepare the right documents and set realistic expectations.

The first step is to assess your current loan. Gather your latest loan statement, check your outstanding balance, and note your current interest rate and any features you are using (such as an offset account or redraw). You should also check whether your loan has any exit fees, break costs (for fixed-rate loans), or discharge fees. This information will form the basis of your comparison with new products.

Next, research and compare loans from different lenders. You can use comparison websites, speak to a mortgage broker, or approach lenders directly. Focus on the comparison rate rather than just the headline rate, as this includes most fees and gives a more accurate picture of the true cost. We cover this in detail in our comparison rate guide.

Once you have chosen a lender and loan product, you will submit a formal application. This typically requires proof of identity, proof of income (payslips or tax returns), details of your assets and liabilities, and a recent property valuation. Many lenders now accept applications entirely online, with digital verification of identity and income.

After your application is approved, your new lender will arrange settlement. During settlement, the new lender pays out your old loan and registers the new mortgage on your property title. Your old loan account is closed, and you begin making repayments on the new loan. If you have an offset account, make sure to transfer any funds before the old account is closed, as these funds will not transfer automatically.

While refinancing can deliver significant savings, it is not free. There are several costs involved in switching lenders, and understanding them upfront will help you calculate whether refinancing truly makes financial sense. The good news is that many of these costs are relatively modest, and some lenders will waive or cover certain fees to win your business.

The discharge fee is charged by your existing lender to close your loan and release the mortgage on your property title. This fee is regulated and typically ranges from $150 to $400. Your new lender may charge an application or establishment fee, though many lenders now waive this for refinancers, particularly for online applications.

Government charges vary by jurisdiction. In most regions, you will need to pay a mortgage registration fee and a mortgage discharge fee to the relevant land titles or registry office. These are generally modest amounts — usually between $100 and $300 in total, though they can vary significantly by country and region. Check with your conveyancer, solicitor, or closing attorney for the exact charges in your area.

To get a clear picture of whether refinancing will save you money, add up all the costs and compare them against your projected savings over two to three years. If the savings exceed the costs within that timeframe, refinancing is generally a sound financial decision. Many lenders and brokers can provide a break-even analysis to help you make this assessment.

Break fees — also known as break costs or early termination fees — are the charges you may face if you exit a fixed-rate home loan before the fixed period ends. These fees can be substantial, sometimes running into thousands or even tens of thousands of dollars, and they are the single biggest reason people on fixed rates hesitate to refinance. Understanding how they are calculated will help you make an informed decision.

Break costs are calculated based on the difference between your fixed rate and the current wholesale market rate for the remaining term of your fixed period. If wholesale rates have dropped since you locked in your rate, the break cost will be higher because the lender is losing more money by releasing you early. Conversely, if rates have risen, break costs may be minimal or even zero.

The formula most lenders use considers three factors: the difference between your fixed rate and the current wholesale rate, your outstanding loan balance, and the time remaining on your fixed term. For example, if you have $400,000 remaining, your fixed rate is 2.00% above the current wholesale rate, and you have two years left, the break cost could be in the range of $16,000. This is a simplified illustration — actual calculations are more complex and vary between lenders.

Some strategies can help you minimise break costs. If your fixed term is close to expiring (within three to six months), it may be worth waiting until it rolls over to a variable rate before refinancing. Some borrowers also use a split loan structure — part fixed, part variable — which gives flexibility to refinance the variable portion without incurring break costs on the fixed portion.

If you are considering refinancing and you are on a fixed rate, always request a break cost estimate from your current lender before proceeding. Compare that figure against your projected savings from the new loan. In some cases, even with significant break costs, the long-term savings from a lower rate can still make refinancing worthwhile.

Cashback offers have become a popular tool for lenders trying to attract refinancers, particularly in Australia, New Zealand, and the UK. These offers typically range from $2,000 to $6,000 (or the local currency equivalent), paid to you after your new loan settles. On the surface, free money sounds like a great deal — but it is essential to look beyond the cashback and evaluate the overall loan product before making a decision.

The purpose of a cashback offer is to offset the costs of switching and sweeten the deal. Many borrowers use the cashback to cover discharge fees, application fees, and conveyancing costs, effectively making the refinance cost-neutral or even profitable in the short term. For borrowers who are already planning to refinance because they have found a better rate, a cashback is a genuine bonus.

To determine whether a cashback offer is genuinely worth it, compare the loan on its merits: the comparison rate, the features included, ongoing fees, and the flexibility of the product. If the loan with the cashback is competitive on all these fronts, the cashback is a genuine advantage. If the loan is mediocre and the cashback is the only drawcard, you are likely better off choosing a product with a lower rate and no cashback.

Also be aware of the conditions attached to cashback offers. Most lenders require you to maintain the loan for a minimum period (usually two to four years) or repay the cashback if you refinance again within that period. Some offers are only available for loans above a certain amount, or they may exclude refinances from within the same banking group. Read the fine print carefully before committing.

Once you have done your research, compared products, and decided that refinancing makes financial sense, it is time to make the switch. Being well-prepared will make the process smoother and faster. Start by gathering all the documents your new lender will need: recent payslips, tax returns (if self-employed), bank statements, your current loan statement, identification documents, and details of any other debts or financial commitments.

If you are working with a mortgage broker, they will handle most of the heavy lifting — submitting your application, liaising with both lenders, and coordinating settlement. If you are going direct, you will need to manage the process yourself, including contacting your current lender to request a payout figure and arranging a conveyancer or solicitor to handle the legal aspects of the title transfer.

During the transition, make sure your existing direct debits and automatic payments are updated once your new loan is active. Transfer any funds from your old offset account before settlement, and confirm that your home insurance policy is updated to reflect the new lender as the interested party. These are small administrative tasks, but overlooking them can cause unnecessary stress.

After settlement, take the time to set up your new loan properly. Ensure your repayment frequency and amount are correct, link your offset account, and set up any additional repayment schedules if you plan to pay more than the minimum. This is also a good time to review your overall financial position and ensure your budget accounts for the new repayment amount.

Refinancing is one of the most effective ways to take control of your mortgage and potentially save tens of thousands of dollars. By understanding the process, costs, and potential pitfalls, you can approach it with confidence. Try our borrowing power calculator to see how refinancing might change your financial picture, and explore our other guides for more strategies to manage your home loan effectively.