Fixed Rate Mortgage Guide NZ 2026

Most New Zealand mortgage holders are on a fixed rate. In a country where the OCR can move 5 percentage points in a year — as it did between 2021 and 2023 — fixing your interest rate is the primary way to protect your household budget from repayment shocks.

But fixed rates come with trade-offs. Choose the wrong term and you could lock yourself out of falling rates, face a large break fee when life changes, or roll over at the worst possible moment.

This guide covers how NZ fixed rate mortgages work, how to choose the right term, and how to manage your fixed rate strategically over the life of your loan.

What Is a Fixed Rate Mortgage?

A fixed rate mortgage locks your interest rate for a set period — called the fixed term. During the term, your repayments stay exactly the same, regardless of what the RBNZ does with the Official Cash Rate or how wholesale market rates move.

When the fixed term ends, the loan rolls over. You then choose a new fixed term (at current market rates), move to a floating rate, or refinance with another lender.

Fixed terms available from NZ banks:

How Fixed Rate Repayments Are Calculated

Your repayment is determined by three things: your loan balance, your interest rate, and your remaining loan term.

Formula: Banks use a standard amortisation calculation. The fixed rate applies to your outstanding principal each month; the remainder of your repayment reduces principal.

Example: $600,000 loan, 25-year term

A 1% difference in rate on a $600,000 loan costs approximately $7,200 more per year in interest at the start of the loan. Over a full 25-year term (assuming the rate held throughout), the difference between 5.5% and 6.5% is approximately $108,000 in total interest.

This is why the choice of fixed rate term and lender matters significantly.

Why Fixed Rates Are Often Lower Than Floating

This seems counterintuitive — but in most market conditions, fixed rates (especially 1–2 year) are cheaper than floating rates in New Zealand.

The reason: floating rates reflect short-term funding costs, which carry a higher uncertainty premium. Fixed rates are funded through the wholesale swap market, where banks can hedge the interest rate risk. In a period where markets expect rates to fall, short-term fixed rates are priced to reflect expected future OCR cuts — which can make them materially cheaper than floating.

In early 2026, with the OCR in a cutting cycle:

• Standard floating rate: ~7.00%–7.09%
• 1-year fixed: ~5.55%–5.60%
• 2-year fixed: ~5.39%–5.45%

On a $600,000 loan, choosing a 2-year fix over floating saves approximately $1,000–$1,100 per month in interest. The trade-off is flexibility — you cannot make large lump-sum repayments or switch without a potential break fee.

For the latest rate comparisons, see our NZ mortgage rates guide.

Choosing a Fixed Term: Key Considerations

1. Rate shape (the yield curve)

Compare current rates across all available terms before choosing. Sometimes the 2-year rate is materially cheaper than the 1-year; other times the curve is flat and the shorter term is more attractive. There’s no fixed rule — the numbers change weekly.

Questions to ask:

• Is the 2-year rate more than 0.15% below the 1-year? If so, the 2-year may be worth the extra commitment.
• Is the 3-year rate similar to or higher than the 2-year? Then the 3-year offers certainty without a rate saving — only take it if that certainty has specific value to you.

2. How long are you staying in the property?

If you expect to sell within 2 years, a 3- or 5-year fix exposes you to break fees at sale. Match your fixed term roughly to your expected ownership horizon:

3. Your ability to absorb a rate rise at rollover

If the 1-year rate expires and the next rate is 1% higher, can you cover the extra repayment?

Example: On $600,000, a 1% rise in rate at rollover adds approximately $350/month to repayments. If that would cause financial stress, fixing for a longer term now locks in a known repayment.

4. Rate direction expectations

This is speculative — no one reliably predicts rate movements. But context helps:

• If the RBNZ is in an active cutting cycle, shorter terms let you capture lower rates at each rollover
• If the OCR has reached or is near a low, longer terms lock in attractive rates before they rise
• If rates are elevated and expected to fall (as in 2024–2025), short-term fixes have outperformed long fixes

The sensible approach for most borrowers is to not make a large one-way bet — use a split structure to diversify across terms.

Split Fixed Terms: Staggering Your Rollovers

Rather than fixing your entire loan at one term, splitting across two different terms staggers your rollover dates. This is the most common approach for NZ borrowers with larger loans.

Example — $700,000 loan:

When Portion B rolls over in April 2027, you reassess the market and fix again (possibly at a different term and rate). When A rolls in April 2028, you do the same. You’re never fully exposed to the market at one moment, and you have a rollover event each year where you can act on rate changes.

This strategy also reduces the total break fee risk — if you need to exit early, only the unexpired portions incur fees, not the entire loan.

Break Fees: The Cost of Exiting Early

A break fee is charged when you exit a fixed rate mortgage before the term expires — for example, because you’re selling, refinancing, or making a large lump-sum repayment.

How break fees are calculated

Banks use a formula based on:

• The difference between your contracted rate and the current equivalent wholesale rate
• Your remaining loan balance
• The time remaining on your fixed term

Simplified example:

• Original fixed rate: 6.50%
• Current market rate for equivalent term: 5.50%
• Remaining balance: $500,000
• Remaining term: 18 months

Approximate break fee: 1.00% × $500,000 × 1.5 years = ~$7,500

Note: actual break fees use a different methodology (present value of the bank’s loss, not a simple annualised calculation). The above is illustrative. Always get a formal break fee quote from your lender before making decisions.

When break fees are zero

If current rates are equal to or higher than your fixed rate, the bank has not lost income by you exiting early. Break fees will be zero (or close to zero). This applies to borrowers who fixed at very low rates and are now in a rising rate environment — they face little financial barrier to exiting.

Can I avoid break fees?

• Switch during a floating period: If you have a split loan with a floating portion, you can make extra repayments into that portion without break fees at any time.
• Time your exit: Exiting in the last few weeks of a fixed term means a tiny remaining period — break fees are minimal.
• Negotiate with your bank: In some circumstances, banks will waive or reduce break fees for long-standing customers, particularly if you’re keeping the mortgage with them through a refinance.

Rollover Strategy: Making the Most of Every Expiry

The rollover moment — when your fixed term expires — is the most valuable opportunity in mortgage management. Banks sometimes automatically roll customers onto unfavourable rates if they don’t act.

60 days before rollover:

• Request rollover options from your current bank
• Compare rates across at least 2–3 other lenders (or ask a broker to do it for you)
• Check whether refinancing to another lender makes sense (consider cash contributions from new lenders)

What to negotiate:

• A rate at or below the best special rate advertised
• A cash contribution from the lender (often $1,000–$3,000 for switching, or matching a competitor’s offer)
• The ability to include an offset or revolving credit portion

What to watch for:

• Automatic rollover at a default rate: contact your bank proactively
• Rate locks: if rates are rising, some lenders allow you to lock in a rollover rate 30–60 days early
• Break fees from the outgoing lender: if you’re refinancing before your current term expires, calculate these first

Fixed Rate vs Other Structures: Quick Comparison

For a full comparison of all structures, see our guide on fixed vs floating mortgages in NZ.

Fixed Rates for First Home Buyers

For first home buyers, a fixed rate — typically 1 or 2 years — provides the repayment certainty needed while settling into homeownership costs.

A few additional considerations:

• Low deposit premium: Borrowers with less than 20% deposit pay a higher rate, regardless of term. Reaching 20% equity as quickly as possible unlocks better rates at rollover.
• KiwiSaver: If you’ve used your KiwiSaver withdrawal for a first home as part of your deposit, ensure your KiwiSaver fund type aligns with your new financial situation — most first home buyers should switch to a balanced or growth fund post-purchase.
• Avoid long terms initially: Until you’ve lived in the property for 6–12 months and understand your true costs, a shorter fixed term gives you more flexibility at rollover.

For the full first home buyer pathway, see our First Home Buyer Guide NZ.

Frequently Asked Questions

What is the most popular fixed mortgage term in NZ? The 1-year fixed term is consistently the most popular in New Zealand, followed by 2 years. This reflects the preference for short commitment periods that allow borrowers to benefit from falling rates at each rollover. In periods of rapidly falling rates (such as 2024–2025), 1-year fixes significantly outperformed longer terms.

Can I fix part of my mortgage and float the rest? Yes — this is called a split loan and is the most common structure for borrowers with larger loans. You fix the bulk of your loan for rate certainty while keeping a smaller floating portion for lump-sum repayments and flexibility.

What happens if I sell my house while on a fixed rate? Your mortgage is repaid at settlement. If current rates are below your fixed rate (meaning rates have fallen since you fixed), you will likely face a break fee. Get a break fee estimate from your bank before setting your settlement date — in some cases the timing can be adjusted to minimise the cost.

Can I make extra repayments on a fixed mortgage? Many NZ banks allow limited extra repayments on fixed loans — often up to 5% of the original loan amount per year — without triggering a break fee. Above this, you may be charged. Check your specific loan agreement or ask your bank before making a large lump-sum payment into a fixed portion.

When is the best time to lock in a fixed rate? When you believe rates are near a low in the cycle. Historically, borrowers who fix at the bottom of a rate cycle lock in relatively cheap rates for the term. The difficulty is that rate bottoms are only obvious in hindsight. A pragmatic approach: fix a portion now and roll the rest when you have more information.

Is a 5-year fixed rate a good idea in NZ? Occasionally — if the 5-year rate is materially lower than shorter terms and you have high confidence you won’t need to exit early. In most NZ rate cycles, the 5-year rate has been higher than shorter terms, making it a certainty premium rather than a rate saving. It suits borrowers who prioritise budget predictability above all else.

What to Read Next

• NZ Mortgage Rates 2026 — current fixed and floating rates
• Fixed vs Floating Mortgage NZ — full structure comparison
• How Home Loans Work in NZ — amortisation and repayment mechanics
• Getting a Mortgage in NZ — the full application process
• NZ Mortgages Complete Guide — everything in one place
• Refinancing Your Mortgage NZ — when switching lenders makes sense
• First Home Buyer Guide NZ — first home pathway