When Should You Refinance Your Mortgage

When Your Fixed Rate Expires

Your fixed rate expiry is the single most important moment to review your mortgage. You're already out of contract, which means no break fees, and banks know you're likely to stick with them unless you actively shop around.

When your term ends, your lender will typically offer you their standard rates, which are rarely their sharpest. In our experience, clients who accept the first offer from their existing bank often pay 0.30% to 0.60% more than they could have secured elsewhere. On a $500,000 mortgage over two years, that difference costs an extra $3,000 to $6,000 in interest.

Christchurch homeowners coming off fixed terms often have more equity than they realise, particularly if they bought before the rebuild accelerated property values in areas like Halswell and Wigram. That equity can unlock refinancing options with better pricing, or allow you to consolidate other debts at a lower rate. A mortgage review six to eight weeks before your term ends gives you time to compare what's available and lock in a new rate before the old one expires.

When Rates Have Dropped Meaningfully

If floating or fixed rates have fallen significantly since you locked in, switching could offset the break fee and still leave you ahead. The key word is significantly. A drop of 0.10% or 0.20% rarely justifies the cost of breaking early unless you have a very large mortgage or a short time left on your fixed term.

Consider a homeowner in Christchurch who fixed $600,000 at 6.50% for two years, with 18 months remaining. If one-year fixed rates have since dropped to 5.70%, the potential saving over the next 12 months is around $4,800. The break fee depends on how much rates have moved and how much time is left, but if it's calculated at $2,500, the switch still saves $2,300 in the first year alone.

Before making the move, ask your current lender or a mortgage adviser to calculate the exact break cost. Some lenders will waive or reduce the fee if you're staying with them and increasing your loan or moving to a longer fixed term. That negotiation can turn a marginal decision into a worthwhile one.

When You Need to Access Equity

You can access equity in your property without switching lenders, but refinancing often gives you a chance to secure a lower rate at the same time. If your property has increased in value or you've paid down your mortgage, you may be able to borrow more without needing to provide additional income evidence, depending on your loan-to-value ratio.

A homeowner in Sumner purchased a property several years ago and has since seen the value climb. They want to release $80,000 to renovate the kitchen and add a second bathroom. Their current lender offers the top-up at 6.80%, but a different lender is willing to refinance the entire mortgage at 6.30% and include the additional borrowing. Over a 25-year term, that 0.50% difference saves more than $30,000 in interest, even after accounting for legal fees and valuation costs.

If you're taking out additional funds, it's worth comparing what your current lender offers against what's available elsewhere. The process for refinancing with a top-up is identical to a standard switch, but the savings can be substantially larger because you're applying the rate difference to a higher loan amount.

When You Want to Consolidate Debt

Consolidating personal loans, credit cards, or car finance into your mortgage can reduce your total monthly repayments and the overall interest you pay. Credit cards often charge 18% to 22%, while mortgage rates sit well below that. Folding high-interest debt into your home loan makes sense if you're disciplined enough not to rebuild the credit card balance once it's cleared.

In a scenario like this, a couple in Christchurch has $35,000 across a car loan at 9.5% and credit card debt at 20%. Their minimum monthly payments total around $1,200. They refinance their $450,000 mortgage and consolidate the debt, bringing the total loan to $485,000 at 6.40%. The new monthly repayment on the entire amount is lower than what they were paying on the mortgage alone, and they've eliminated the high-interest debt entirely.

The downside is that you're now paying off that $35,000 over the life of the mortgage unless you make extra repayments. If you treat it like a personal loan and pay it down faster, consolidation works well. If you stretch it over 25 years, you'll pay more interest in the long run despite the lower rate.

When Your Lender Won't Budge

Some lenders will negotiate if you ask, particularly if you've been with them for years and have equity in your property. Others won't move, even when you show them what's available elsewhere. If your bank refuses to match or come close to competitive rates, switching becomes the only way to stop overpaying.

We regularly see this in Christchurch, where long-term customers assume loyalty will be rewarded and are surprised when their lender offers them the same rate as a brand-new borrower. If you've asked for a review and been told there's no room to move, contact a mortgage adviser who can show you what other lenders are offering and handle the switch process for you.

The application, valuation, and legal work typically take three to five weeks, so you'll need to plan ahead if your fixed term is ending soon. Most lenders allow you to lock in a rate up to 90 days before settlement, which protects you if rates rise while your application is being processed.

When Refinancing Doesn't Make Sense

Not every situation calls for a switch. If you're still in a fixed term and rates haven't moved much, the break fee will likely wipe out any gain. If you're planning to sell within the next 12 months, the cost and effort of refinancing may not be worth it.

You also need to factor in legal fees, valuation costs, and any discharge fees from your current lender. These typically add up to $1,500 to $3,000, depending on your location and property type. Some lenders offer cashback deals that cover these costs, but those offers usually come with conditions like staying with the lender for a minimum period or accepting a slightly higher rate.

If the numbers don't stack up, staying put is the right move. A mortgage review will show you whether switching makes financial sense or whether you're already in a reasonable position.

Refinancing works when the timing, the numbers, and your situation align. If your fixed rate is ending, rates have dropped, or you need access to equity, it's worth running the numbers. Call one of our team or book an appointment at a time that works for you.

Frequently Asked Questions