Top Tips to Know When to Refinance Your Mortgage

Refinancing your mortgage makes sense when the financial benefit outweighs the costs, or when your circumstances have changed enough that your current loan no longer fits.

Most people think about refinancing when rates drop, but that's only one trigger. Your fixed rate expiry date, a jump in your property's value, or a need to consolidate debt can all make refinancing worthwhile. The challenge is knowing which of these reasons actually justifies the effort and expense of switching.

Your Fixed Rate Is About to Expire

The best time to review your mortgage is two to three months before your fixed term ends. At this point, you're not locked in yet, and you have time to compare what your current bank is offering against what's available elsewhere. If you wait until the week before expiry, you'll be rushed into a decision or pushed onto a higher floating rate while you sort things out.

Consider a borrower in Hamilton with a one-year fixed rate coming off in June. They're currently paying 6.8%, and their bank has offered to re-fix them at 6.5% for another year. A mortgage adviser runs the numbers and finds another lender offering 6.2% with a $3,000 cashback. Over a $500,000 loan, that rate difference alone is worth around $1,500 in the first year, and the cashback covers most of the legal and valuation costs. The borrower switches, locks in the lower rate, and pockets the difference.

Don't assume your current bank will give you their sharpest rate just because you've been with them for years. Loyalty doesn't always pay off in banking, and retention offers often lag what's available to new customers.

You've Built Up Significant Equity

If your property value has increased or you've paid down a meaningful chunk of your loan, refinancing can unlock lower rates or let you access that equity for other purposes. Lenders price loans based on your loan-to-value ratio (LVR), so moving from 85% LVR to 70% can open the door to cheaper rates and remove low equity fees.

In Hamilton, property values in areas like Flagstaff and Rototuna have climbed over recent years. A homeowner who bought with a 10% deposit three years ago might now be sitting on 30% or more equity without realising it. That shift can mean the difference between paying an extra 0.3% in interest and qualifying for the bank's standard rates. Refinancing at that point isn't just about switching banks, it's about repositioning your loan to reflect your actual risk profile.

You can also use that equity to consolidate higher-interest debt like credit cards or car loans, rolling them into your mortgage at a much lower rate. If you're juggling multiple repayments and want to simplify your finances while reducing your overall interest bill, refinancing can make that happen in one move.

Rates Have Dropped and the Savings Add Up

A rate drop on its own isn't always enough to justify refinancing. You need to weigh the interest savings against the costs involved, including legal fees, valuation costs, and any break fees if you're leaving a fixed term early.

As a rough guide, if you can save 0.5% or more on your interest rate and you plan to stay in the property for at least another two years, refinancing is likely to pay off. Plug your numbers into a refinance calculator or talk to a broker who can show you the break-even point. If the savings are marginal or you're planning to sell soon, it might not be worth the hassle.

Break fees can be the deal-breaker if you're still locked into a fixed term. These are calculated based on the difference between your current rate and what the bank can lend that money out at today. If rates have risen since you fixed, your break fee will likely be zero. If rates have fallen, the fee could run into the thousands. Get an exact figure from your lender before you make any decisions.

Your Financial Situation Has Changed

Refinancing isn't just about chasing a lower rate. It's also a way to restructure your loan when your income, expenses, or goals have shifted. If you've had a pay rise, changed jobs, or cleared other debts, you might now qualify for a loan you didn't have access to before. On the flip side, if your income has dropped or you're heading into a period of uncertainty, refinancing onto a longer term or a more flexible loan structure can give you breathing room.

Debt consolidation is one of the most common reasons to refinance outside of rate changes. If you're carrying credit card debt at 20% interest and a car loan at 12%, rolling those into your mortgage at 6% or 7% can cut your monthly repayments significantly. The trade-off is that you're securing that debt against your house and spreading it over a longer period, so you'll pay more interest in total unless you make extra repayments.

Some borrowers also refinance to access equity for renovations, investments, or other large expenses. As long as you're not over-leveraging and you have a clear plan for how you'll use the funds, this can be a sensible way to fund projects without resorting to personal loans or credit cards.

You Want More Flexibility or Different Features

Not all loans are built the same. If your current mortgage doesn't let you make extra repayments, redraw funds, or split your loan between fixed and floating, you might be missing out on features that could save you money or give you more control.

A split loan lets you lock in part of your mortgage at a fixed rate for certainty, while keeping the rest on floating so you can make lump sum repayments without penalty. If you're self-employed, get irregular income, or expect a bonus or inheritance, that flexibility can shave years off your loan term. Refinancing to a lender that offers offset accounts, lower break fees, or more generous repayment options can make a real difference over the life of your loan.

Some people also switch lenders because their current bank's service has dropped off or they've had a frustrating experience trying to make changes. It's your mortgage, and if the relationship isn't working, you're not stuck.

How to Know If Refinancing Is Worth It for You

Start by working out what you're paying now, what you could be paying elsewhere, and what it will cost to switch. That includes legal fees (usually $800 to $1,500), valuation costs (around $500 to $1,000), and any break fees if applicable. Some lenders offer cashback deals that offset these costs, but make sure the rate you're getting is still competitive once the cashback is factored in.

Talk to a mortgage adviser who can compare offers across multiple lenders and show you the actual dollar difference over one, two, and five years. They'll also flag any deal-breakers like clawback clauses on cashback offers or restrictions that might not suit your situation.

If you're within three months of your fixed rate expiry, the timing is right to start shopping around. If you're mid-term but rates have shifted or your circumstances have changed, get a break fee quote and run the numbers. And if you're not sure whether your current loan is still serving you, a mortgage health check can give you a clear picture of where you stand and whether there's a more suitable option out there.

Refinancing isn't something you do every year, but it's also not something you should ignore just because your current loan is ticking along. The difference between a good deal and an average one compounds over time, and a few hours of effort now can translate to thousands of dollars saved down the line.

Call one of our team or book an appointment at a time that works for you. We'll walk you through your options, show you the numbers, and help you decide whether refinancing makes sense for your situation.

Frequently Asked Questions