RBNZ Statistics — Mortgage Rates & Housing Macro Data

The Facts

The Reserve Bank of New Zealand (RBNZ) publishes the official monetary, financial and housing dataset for New Zealand. Key tables for property developers include OCR (the policy rate), F1 (wholesale swap rates that drive carded mortgage pricing), C5 (sector lending including housing credit), C30 and C31 (new residential mortgage lending, including by LVR band), and B6 (exchange rates relevant when costing imported materials). The data is free, downloadable as CSV or Excel, updated monthly or quarterly depending on series. RBNZ is the canonical source for any analysis of NZ housing finance conditions.

A Developer's Take

Read the facts from the source, don't wait for your favourite news outlet to report on it. RBNZ provides FREE macro data on NZ housing and credit conditions. The canonical source for OCR, mortgage rates, household credit, LVR distribution. This is getting more nerdy and requires a wider view and understanding of macro economics, but a powerful free resource nonetheless. One that I do not believe is used enough.

The key tables for property developers:

• B6: new residential mortgage commitments by LVR. Tells you what proportion of new lending is high-LVR (above 80%). Key signal for first-home buyer activity.

• C5: sectoral credit including housing. Tells you whether the bank system is expanding or contracting housing credit overall.

• F1: yields on government bonds. The wholesale rate that drives bank mortgage pricing. Track the 2-year and 5-year swap.

• OCR announcement calendar. The dates that move the market.

How to use it: pull the latest C5 data each quarter. If sectoral credit growth in housing is slowing while population growth is steady, you're in a market where buyers are credit-constrained, not demand-constrained. That changes your strategy on what to build and when to sell.

The other thing RBNZ publishes that nobody reads: the Financial Stability Report (twice a year). Eighty pages of analysis from the people who actually steer the macro settings. If you're making any decision with a five-year horizon, read it.

For free, this is the highest-signal NZ housing macro data available. CoreLogic, QV, TradeMe are all great for individual properties. RBNZ is the only source that tells you what the system is doing.

When to use this

Pull RBNZ data when you need to ground a financing assumption in something more than a bank's website. C31 tells you what is actually being written on LVR; C5 tells you whether housing credit is expanding or contracting; F1 sets the wholesale floor for carded fixed-term mortgages; the OCR track sets the floor for floating rates. Use it for any feasibility that needs a hold-period interest forecast, refinance modelling, or a lender narrative. Macro context also matters in vendor advisory work — it is the difference between a guess and a defensible view.