Around 43 percent of New Zealand residential mortgage debt will reprice in the next six months, driving many households toward higher costs even while the Reserve Bank holds the Official Cash Rate at 2.25 percent.
At a glance
Wholesale costs are lifting retail mortgage rates ahead of any OCR move, forcing nearly half of NZ borrowers to refinance into higher repayments in the next six months.
"The path for rates is higher, not lower."Jarrod Kerr, chief economist, Kiwibank
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Around 43 percent of New Zealand residential mortgage debt will reprice in the next six months, driving many households toward higher costs even while the Reserve Bank holds the Official Cash Rate at 2.25 percent.
Property data firm Cotality says the market is at a significant turning point. Chief property economist Kelvin Davidson said market mortgage rates are rising ahead of any medium-term OCR increases — a reversal of the dynamic that rewarded borrowers through most of 2025.
Over the past two years, many borrowers were rewarded for staying on short-term fixed rates because they could repeatedly reprice on to lower rates. That strategy has become much less effective.
This shift follows months of rising wholesale funding costs. Banks have passed those costs through to retail rates ahead of any Official Cash Rate move. The strategy of rolling short-term fixes, which delivered repeated cuts through 2025, has lost its edge.
Reserve Bank data show 43 percent of existing residential mortgage debt is floating or fixed for terms that expire within six months. Borrowers who took six-month fixes at 4.8 percent in October now confront two-year rates around 5.1 percent, a 30 basis point increase.
A 30 basis point rise on a $600,000 loan adds roughly $180 per fortnight before tax effects. The five major lenders — ANZ, ASB, BNZ, Westpac and Kiwibank — control the bulk of the $400 billion-plus mortgage book.
RBNZ standard two-year rate reached 5.65 percent in March 2026, up from 5.41 percent in February 2026. Floating rates remain near 5.80 percent.
New lending data show the two-year fixed term captured 29 percent of originations in March, the single most popular bucket. Terms longer than 12 months now exceed 50 percent of new lending, up from below 10 percent in late 2024.
Total new residential mortgage lending reached $9,498 million in March 2026, with principal and interest loans dominating at $7,891 million. Two-year fixed new owner-occupier lending alone reached $1,779 million in March, reflecting the sharp pivot toward longer-duration fixing.
The Reserve Bank held the OCR at 2.25 percent in April and is expected to leave it unchanged at the May 27 Monetary Policy Statement. Its February projection pointed to only modest drift higher by year-end, with the December 2026 average OCR projected around 2.38 percent.
Market pricing and bank economist commentary point the other way. Westpac IQ lifted its terminal OCR forecast by 20 basis points to around 3.2 percent, with some market pricing flirting with three 25-basis-point hikes by year-end.
"I don't see mortgage rates falling. The obvious path is higher, not lower." — Jarrod Kerr, chief economist, Kiwibank
Cotality also noted that borrowers are reassessing the OCR outlook amid risks of inflation staying elevated due to higher fuel and transport costs — a factor that could keep mortgage rates higher for longer regardless of the policy rate's near-term trajectory.
Higher servicing costs for the 43 percent repricing cohort will reduce disposable income. That transmission hits consumption and retail spending in coming quarters. Banks gain from wider spreads on the repriced volume.
The episode shows monetary policy lags in action. Wholesale markets have already priced tighter conditions while the policy rate stays on hold. The May 27 Monetary Policy Statement — and any revision to the RBNZ's projected OCR path — will be the next key signal for whether the gap between wholesale pricing and the official rate narrows or widens further.
