The ‘security’ of cash today often comes at the expense of tomorrow's purchasing power.

New Zealanders tend to hold cash reserves despite changing interest rate conditions. The RBNZ has cut the Official Cash Rate to 3.0% in August 2025 from its peak of 5.5% in early 2024, with term deposits following suit. While declining in line with the OCR, term deposit rates remain attractive; the highest rates on Canstar's database sit at 4.50%.

Yet, NZ’s economy contracted in the second quarter of 2025. Inflation increased to 2.70% in the same period[1] – well within the RBNZ's 1-3% target band but adding pressure to real returns.

The Money Illusion Trap

Many investors fall victim to what economists call "the money illusion": thinking about money in nominal rather than real terms[2].

A $100,000 term deposit earning 4.5% generates $4,500 annually, which feels like growth. But for someone paying 33% tax, the after-tax return is just $3,015 (3.015%). With inflation at 2.7%, this creates a real return of just 0.315%. For those in the top tax bracket (39%), this return becomes 2.745% - providing a microscopic real return of $45. That’s barely enough to buy a decent bottle of wine to drown your wealth preservation strategy sorrows.

Major bank economists forecast the OCR will fall to 2.5% by the end of 2025 or early 2026[3]. If term deposits drop to around 3%, a 33% taxpayer will earn an even measlier 2.01%.

Hidden Costs of Cash Comfort

Opportunity Cost: While current term deposits offer reasonable returns, historical equity market returns in New Zealand averaged 7-10% annually over longer periods. That 2-5% difference compounds substantially over decades.[4]

Rate Dependency Risk: With the two-year swap rate expected to drop to 2.8% as the OCR reaches 2.5%, retail deposit rates will follow. Unlike growth assets that can benefit from economic recovery, cash offers no upside participation.

Inflation Protection: Cash provides no hedge against rising costs. With administered prices driving near-term inflation pressures, purchasing power erosion remains a persistent threat.

The Economic Reality Check

New Zealand's economic recovery stalled in the second quarter. Spending is constrained by global economic policy uncertainty, falling employment, higher goods prices, and declining house prices. RBNZ notes there is scope to lower the OCR further if medium-term inflation pressures continue to ease as expected[5].

This makes holding large cash positions riskier; cash-savers face declining returns and miss potential recovery gains in other asset classes.[6]

Cash has its place – as part of a strategic, sophisticated portfolio, where professional advisers can implement a bond laddering strategy (providing income stability with superior yields to deposits), liquidity management to provide regular cash flow and reduce the need for large cash reserves and can recommend PIE funds and other tax-efficient structures that minimise the tax drag.

The Value of Professional Advice

History has shown many investors start panic selling during downturns, chasing performance at market peaks, or hoarding cash.

When cash returns are low, investors venture into adventurous territory: junk bonds, private credit, mezzanine debt arrangements, and other high-yield instruments that carry higher risks.

Working with a fee-only, fiduciary adviser is invaluable. Look for advisers who:

Conduct thorough discovery of your financial situation
Explain their investment philosophy and process clearly
Provide transparent fee disclosure with no hidden commissions
Demonstrate relevant credentials (CFP, AIF, CEFEX)
Show measurable progress tracking methods

The Bottom Line

With NZ’s economic headwinds, sitting in cash isn't the safe option - it's the wealth erosion option.

"She'll be right" doesn't cut the mustard when your money's losing value faster than a leaky boat. After tax and inflation, that "safe" term deposit is barely keeping you afloat. Your future wealth depends on making this distinction now, not when it's convenient.

**Nick Stewart**
*(Ngāi Tahu, Ngāti Huirapa, Ngāti Māmoe, Ngāti Waitaha)*
Financial Adviser and CEO at Stewart Group

Stewart Group is a Hawke's Bay and Wellington based CEFEX & BCorp certified financial planning and advisory firm providing personal fiduciary services, Wealth Management, Risk Insurance & KiwiSaver scheme solutions.
The information provided, or any opinions expressed in this article, are of a general nature only and should not be construed or relied on as a recommendation to invest in a financial product or class of financial products. You should seek financial advice specific to your circumstances from a Financial Adviser before making any financial decisions. A disclosure statement can be obtained free of charge by calling 0800 878 961 or visit our website, www.stewartgroup.co.nz
Article no. 423

References

Trading Economics. (2025). New Zealand Inflation Rate - Q2 2025. Available at: https://tradingeconomics.com/new-zealand/inflation-cpi
Shafir, E., Diamond, P., & Tversky, A. (1997). Money Illusion. Quarterly Journal of Economics, 112(2), 341-374.
ANZ Bank New Zealand. (2025). Weekly Data Wrap: Economic Forecasts and OCR Projections. Available at: https://www.anz.co.nz/about-us/economic-markets-research/data-wrap/
NZX Limited. (2024). Historical Returns Analysis: New Zealand Equity Market Performance 1987-2024. Wellington: NZX.
Reserve Bank of New Zealand. (2025). Monetary Policy Statement August 2025. Wellington: RBNZ. Available at: https://www.rbnz.govt.nz/hub/publications/monetary-policy-statement/2025/08/monetary-policy-statement-august-2025
DALBAR Inc. (2024). Quantitative Analysis of Investor Behavior: New Zealand Market Study. Boston: DALBAR Research.