A floating rate mortgage is the most flexible home loan structure available in New Zealand — your interest rate moves with the market, and you can make extra repayments or pay off the loan entirely without penalty. But that flexibility comes at a cost: floating rates are typically 1.0%–1.5% higher than the best available fixed rates.
How Floating Rates Work
A floating rate (also called a variable rate) is linked to the lender’s standard variable rate, which in turn responds to changes in the Reserve Bank of NZ’s (RBNZ) Official Cash Rate (OCR).
When the RBNZ cuts the OCR, floating rates typically fall within a few weeks. When the OCR rises, floating rates rise. The transmission is not instant or automatic — banks have discretion on timing and magnitude — but the relationship is strong.
Current floating rate (April 2026): Most major banks are around 6.99%–7.09% for owner-occupiers.
Compare to the 1-year fixed rate of approximately 5.55% — the floating rate is roughly 1.5% higher. On a $600,000 balance, that’s $9,000 more per year in interest. This is why most NZ borrowers choose to fix.
Advantages of a Floating Rate
1. No break fees
The defining advantage. You can make lump-sum repayments, pay off the loan entirely, or switch to fixed at any time — without paying a break fee. For borrowers expecting a large windfall (inheritance, business sale, bonus), floating avoids the risk of a costly break fee.
2. Repayments adjust automatically when rates fall
If the OCR falls and the floating rate drops from 7.09% to 6.09%, your repayments automatically decrease (or more of each repayment goes to principal, depending on how the loan is structured). You don’t need to wait until a fixed term expires.
3. Maximum flexibility
No fixed-term commitment. Ideal for borrowers in uncertain situations — planning to sell in the short term, considering an overseas move, or expecting income changes that might require mortgage restructuring.
4. No risk of being locked into a high rate
If you fix at 5.50% and rates fall to 4.00%, you’re stuck paying the higher rate until your term expires. On floating, you benefit from rate cuts immediately.
Disadvantages of a Floating Rate
1. Higher current rate
In most market conditions, floating rates are significantly above the best short-term fixed rates. The premium for floating is typically 1.0%–2.0%. This is real money: on a $700,000 loan, 1.5% extra = $10,500/year in additional interest.
2. Rate uncertainty
If the OCR rises, so does your rate and your repayment. Budget planning becomes harder. For borrowers with tight monthly budgets, this unpredictability is a genuine risk.
3. Less discipline on spending
Without a fixed repayment commitment, some borrowers find it easier to spend rather than repay. The psychological commitment of a fixed repayment can be a useful tool for building equity.
Who Should Consider a Floating Rate?
A floating rate suits:
- Borrowers expecting to sell or move within 12 months (avoids break fees)
- Borrowers expecting a large lump sum — inheritance, sale of assets — who want to repay without penalty
- Borrowers who believe rates will fall significantly and want to benefit immediately rather than waiting for a fixed term to expire
- Revolving credit users — many revolving credit mortgages are effectively floating (interest charged daily on the balance)
- Short-term holding — bridge financing or transition situations
It does not suit borrowers who:
- Need budget certainty for repayments
- Have a tight income-to-mortgage ratio
- Believe rates will rise or stay elevated
- Have a long horizon and want to minimise total interest cost
Floating Rate + Fixed Rate: The Split Approach
Most NZ borrowers who want floating rate flexibility don’t put their entire mortgage on floating. Instead, they use a split structure:
- 70–80% of the loan fixed (rate certainty and lower rate)
- 20–30% on floating (flexibility for extra repayments)
This gives you the best of both worlds. The floating portion can absorb lump-sum payments (tax refund, bonus, inheritance) without break fees, while the fixed portion keeps the bulk of the debt at a lower rate.
See Split Mortgage Strategy NZ for how to structure this effectively.
Floating Rate vs OCR: The Relationship
The RBNZ OCR and floating mortgage rates don’t move in exact lockstep, but the correlation is very strong:
| OCR (indicative) | Typical floating rate |
|---|---|
| 5.50% (2023 peak) | 8.50%–8.64% |
| 4.75% (late 2024) | 7.64%–7.80% |
| 3.50% (early 2026, est.) | 6.99%–7.14% |
| 2.50% (hypothetical) | 5.99%–6.14% |
The margin above the OCR reflects the bank’s cost of funding, operational costs, and profit margin. This margin has generally increased since 2020 compared to pre-COVID levels.
Further Reading
- Fixed vs Floating Mortgage NZ — comparing the two main structures
- Split Mortgage Strategy NZ — using both fixed and floating
- Revolving Credit Mortgage NZ — a floating-rate flexible alternative
- Current NZ Mortgage Rates — current rates for all types
- When to Fix Your Mortgage NZ — timing decisions