Talking to Clients About Interest Rate Risk

Rate conversations are among the most common and most important discussions a broker has with clients. Yet many borrowers arrive at settlement without a real understanding of how interest rate movements can affect their repayments over time, or what choices they have made and why. For brokers, developing a clear and consistent way to talk about interest rate risk is not just good practice - it is part of providing sound financial guidance under the expectations of the CCCFA and responsible lending principles.

Why This Conversation Matters

Many clients focus almost entirely on the rate they are starting on rather than on how their loan will behave if conditions change. This is understandable - the current repayment figure is concrete and immediate, while future rate scenarios feel abstract. But a borrower who has stretched to their serviceability limit on a short fixed term faces meaningful risk if rates are higher when they come to refix. Helping clients think through this possibility is part of acting in their long-term interest.

It is important to frame this conversation as education rather than prediction. The role of the broker is not to forecast where rates will go - that is not possible with any reliability - but to help clients understand the mechanics of how rate changes affect repayments, and to help them make a structure choice that reflects their own risk tolerance and financial position.

Explaining Fixed vs Floating in Plain Terms

The core distinction is simple: a fixed rate locks the interest cost for a defined term, providing certainty of repayment during that period. A floating rate moves with the lender's base rate, which in New Zealand is influenced by the Official Cash Rate (OCR) set by the Reserve Bank. When the OCR rises, floating rates typically rise. When it falls, floating rates typically follow.

Clients often ask which is better. The honest answer is that neither is universally superior - the right choice depends on the client's circumstances, the shape of their loan, and what they value: certainty of repayment or the flexibility to make lump-sum payments without break costs. Brokers can help clients articulate their own preferences rather than prescribing a single answer.

The Concept of Rate Sensitivity

A useful exercise is to show clients concretely what a rate movement means for their repayments. For a $600,000 loan, even a one percentage point increase in rate can add several hundred dollars per month to repayments. Showing this figure in real terms, rather than describing it abstractly, tends to land more effectively and helps clients make a genuinely informed choice about how much fixed-rate certainty they want.

Some brokers use a simple sensitivity table showing repayments at various rate levels, from current rates up to a higher scenario. This is not a forecast - it is a planning tool. Presenting it as such, and inviting the client to consider how they would manage each scenario, is a valuable part of the structure conversation. Clients who have thought through these scenarios before they arise are far better prepared to make calm decisions when it matters.

Discussing Loan Structure as a Risk Management Tool

Splitting a loan across multiple fixed terms is one way clients can manage rate risk without having to make an all-or-nothing bet on where rates will go. By spreading refix dates, a client avoids the scenario of their entire loan coming off a low fixed rate at the same time. This is a commonly used approach and worth explaining to clients who may not have considered it.

The floating portion of a split loan also allows clients to make additional repayments without break costs, which appeals to those who expect to receive lump sums - through a bonus, inheritance, or property sale - during the loan term. Understanding the client's full financial picture helps brokers recommend a structure that serves more than one purpose at once.

Documenting the Conversation

From a compliance and best-practice perspective, brokers should document the rate risk discussion and the client's acknowledged understanding of the options. At Chaperone, our platform supports structured notes and disclosure records that help brokers demonstrate the quality of their advice process. A clear, honest rate conversation - and a record of it - protects the client and the broker alike.