Wholesale money markets are pricing the OCR to rise from 2.25% to 3.75% over the next year. The mechanics of how that flows through to your fixed mortgage rate aren't as simple as matching the OCR move — and the international benchmarks matter as much as the local one.
The wholesale money markets are sending a clear signal: interest rates are heading higher, according to interest.co.nz's analysis of the bond and money markets. What that means for borrowers depends on whether your mortgage is fixed, floating, or due for renewal soon — and the answer is more complicated than just watching the official cash rate.
Markets are currently pricing the RBNZ's OCR to rise from its current 2.25 percent to around 3.75 percent over the next twelve months. That reflects the expectation that inflation — driven higher by the oil price shock from the Middle East conflict — will remain above the RBNZ's target band of 1 to 3 percent for longer than previously anticipated.
Why the OCR change matters less than you think
Most New Zealand mortgages are on fixed rates rather than floating. That means the rate you pay is locked in for the term you've chosen — typically one to three years. When that term expires, you refinance at whatever the market is offering at the time.
The rates you eventually refinance at aren't determined by the OCR alone. They're heavily influenced by international benchmarks, particularly the cost of funds in the wholesale market, where banks source the money they then lend out. The New Zealand Government bond yields — a key proxy for the cost of bank funding — have been rising sharply. The one-year NZGB yield has gone from 2.45 percent in October 2025 to just under 3.1 percent now. The two-year has risen from 2.5 percent to 3.7 percent. Those are material moves in a short period.
The global picture
This is not a New Zealand-specific phenomenon. Central banks around the world are in a rising rates cycle. Markets are pricing in two more 25 basis point hikes from the RBA in Australia, three from the ECB, three from the Bank of Canada, one from the US Federal Reserve, and three from the Bank of England.
New Zealand appears to be catching up from further behind — which explains why the market is pricing six 25 basis point hikes here over the next year, more than most other central banks. The RBNZ removed the dual mandate that required it to consider employment when setting rates, and now has a sole focus on inflation control. That makes it more responsive to price pressure than it was during the period when it was balancing就业 alongside inflation.
What this means for mortgage holders
For someone with a $321,000 average home loan — approximately what the RBNZ's data shows for current owner-occupiers — a 1.5 percentage point rise in rates adds roughly $4,800 per year in interest costs if the full increase comes through on the portion that refinances. The impact is gradual and depends on when individual fixed terms expire.
The article notes that half of borrowers will be borrowing less than the average, and many will have fixed terms that haven't yet expired. So the full effect flows through gradually as people come off their current fixed rates and onto new ones.
For investors and those on floating rates, the impact is more immediate — floating rates typically move in line with the RBNZ's changes, which means those borrowers feel the full increase faster.
What markets are watching
The key uncertainty is whether the oil price shock is temporary or sustained. If the Middle East conflict resolves and fuel prices ease, the inflation outlook shifts and the rate hike cycle may be shallower. If it persists, the RBNZ will be under continued pressure to act.
For now, the direction is clear: rates are going higher. The market has priced that in. The question is how far, and how fast it flows through to the rates that actually matter for borrowers.
This article is for general information only and is not personalised financial advice. Seek advice from a licensed financial adviser (registered on the FSPR) for guidance specific to your situation.