Flexible savings with a yield of 3.35%*

*Current expected yield after fees, before tax. The yield to maturity is not a guaranteed return and is subject to change and based on a portfolio of investments as of 7 October 2026. The yield to maturity of an investment is the annualised interest rate earned assuming everything stays the same, all expected interest payments are made and principal is repaid. More information on yield to maturity (YTM) is available in the FAQs on this page.

Start investing with just $500 - Investment Funds Cash Fund

Start investing with just $500

The MAS Investment Funds Cash Fund invests in cash and cash-equivalents, such as term deposits and short-term fixed interest securities. Check out our Quarterly Investment Fund Updates if you'd like to know the full mix of assets held.

It's suitable for those looking for a higher return than average on-call savings accounts, while maintaining easy access to your money.

There's no minimum investment timeframe, and the annual charge is only 0.25%.

Why choose the MAS Investment Funds Cash Fund?

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Hands-on investment management

Our active approach to investing aims to outperform the market and deliver higher returns for your investment.

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Advice when you need it

Our range of tools and nationwide network of MAS Advisers are here to help you grow your wealth and create the financial future you want.

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100% owned by our Members

We're a New Zealand owned mutual that's here for our Members, not overseas shareholders. When you join us, you become one of our owners.

Unit prices

Daily unit prices for the MAS Investment Funds Cash Fund.

Cumulative performance

The chart shows cumulative fund performance before tax for the MAS Investment Funds Cash Fund. The performance graph assumes the growth of $10,000 invested since the commencement date shown for the selected performance period. Past performance is not an indicator of future performance.

Cash Fund

Suits those who require an investment with very low volatility.

Min. suggested investment timeframe: No minimum

Risk indicator: 1

Show asset allocation
  • Cash & Cash Equivalents 100%

A smarter way to invest your cash

Get easy access to your money

Withdrawals are generally paid within 5 business days

Invests in a range of short-term fixed interest securities

Invest in cash, cash-equivalents, and short-term fixed interest securities

A maximum tax rate of 28%

As the MAS Investment Funds is a PIE fund, you pay a maximum of 28% tax on your investment compared to up to 39% RWT that may apply to other investments.

Open to individuals, joint investors, trusts, and companies

A smarter way - Investment Funds Cash Fund

Easy account management

It's simple to manage your account in myMAS. View your balance, switch Funds, update your details, and more.

Yield to Maturity - Frequently Asked Questions

What is the Yield to Maturity (YTM)?

The YTM provided for the Cash Fund, is an annualised indicative weighted average yield (after fund charges and before tax) for the Cash Fund.

Put simply, YTM is the annual return an investor might expect to earn at a given point in time if everything stays the same. It assumes all interest is paid and the original investment is fully repaid.

Given these assumptions, YTM will change over time and will not exactly match future returns achieved. However, YTM can be viewed as an indicator of future returns at a moment in time (after fund charges and before tax).

How do you calculate YTM?

The YTM is a way of estimating the return you can expect from investments such as cash, term deposits, or bonds, if they are held until they mature. We have calculated the YTM to show an estimated rate of annualised return for an investor at a specific point in time. This rate is subject to change and is based on the portfolio of investments as at the published date. It takes into account:

  • the interest payments expected to be received
  • any changes in value of the investments between purchase and now
  • what you paid to invest.

In other words, it’s a ‘total return’ measure that shows what you’re expected to get back, compared to what you put in, assuming everything stays the same and the investments are held to their maturity.

How often is YTM updated?

YTM is calculated and updated on our website monthly, or more frequently if needed due to investment activity or during certain market environments that materially change YTM.

Is the YTM the same as a coupon?

Coupon (or interest) and YTM are different. A bond’s coupon is the fixed annual interest payment, calculated as a percentage of its value it was issued at. YTM is a better measure of expected return, as it accounts for the timing of cash flows and any change in the value of the investment through to its maturity, all other things being equal. It’s important to know whether a rate refers to the coupon or the yield. There can be a meaningful difference.

Does the Cash Fund only invest in cash assets?

The Cash Fund can invest in cash and cash equivalents, such as term deposits, and short-term fixed interest securities. If you would like to know the actual mix, please refer to the Quarterly Fund Updates.

Does the Government deposit guarantee cover the Cash Fund?

No, as Medical Funds Management Limited (MFM) as manager of the MAS Investment Funds (Scheme) isn’t a registered bank or licensed deposit taker, the MAS Investment Funds Cash Fund is not covered by the Depositor Compensation Scheme (DCS)*, also known as the Government deposit guarantee.

Your money is held by an independent custodian (Public Trust) separate from MFM. So even if MFM faces financial trouble, your investment money is held separately.

While this guarantee doesn’t apply to Scheme funds invested in New Zealand banks, our investment managers assess each issuer’s financial strength and apply disciplined exposure limits to ensure high quality across the investments.

*The DCS was launched in mid-2025 and covers up to $100,000 per person per licensed deposit taker, to protect depositors if their bank or financial institution fails.

What our Members say

As a mutual, our Members are our top priority
  • “One of the best things about MAS is that it’s a Member Society, which means I know they’re representing me, rather than looking after their own interests.”

    Kristofer Fox, Teacher

  • “Hands down the best rates on the market we could find.”

    Michael Taylor, Musician

  • “If you’re going to be spending your money and supporting one company over another, you should be putting your dollars where it counts.”

    Katherine Reinhold, Lawyer

  • “You know, you get the feeling that they’re actually interested in what’s the right product for you.”

    Sandra Bennett, GP

Medical Funds Management Limited, JBWere (NZ) Limited, Amova Asset Management New Zealand Limited and BlackRock Investment Management (Australia) Limited, their parent companies and associated entities do not guarantee the return of capital or the performance of investment funds. Returns indicated may bear no relation to future performance. The value of investments will fluctuate as the value of underlying assets rise or fall.

Medical Funds Management Limited is the issuer and manager of MAS Investment Funds. The Product Disclosure Statement is available at MAS Investment Funds PDS.

If you would like to talk to a MAS Adviser, phone 0800 800 627 or email info@mas.co.nz.

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