Your default savings account is leaking money: where to park your money in NZ in 2026

I got served an ad for a BNZ high-interest savings account the other day and had to laugh. 1.6%. That doesn't even keep pace with inflation, and it got me thinking about where your cash could be sitting instead.

A lot has changed. Not long ago, a savings account meant whatever your own bank put in front of you. Now there's a whole layer of apps on top of the banks, Sharesies, Kernel, Wedge, and on the headline rate they routinely beat the big four. The real question is whether that headline rate tells the whole story.

Mostly it doesn't, because these products aren't apples for apples. Two can show the same rate and still be very different underneath, and the number on the ad hides two things that matter just as much: how much risk you're taking, and how fast you can get your money back when you need it.

Take the risk side first. A bank savings account is government-protected but tends to pay less. A money-market savings fund pays more, but it isn't a bank deposit. Then there's access. Westpac's Notice Saver pays a genuinely good 3%, yet you'll wait at least 32 days to pull your money out.

For some goals, a 32-day wait is no problem at all. For an emergency fund, it's hopeless, because the car never breaks down with a month's notice. That money has to be there the same day.

An adviser is useful here precisely because the setup that works for most people isn't one account, it's a few. A small slice you can grab instantly, say up to $5,000, for true emergencies. Then the bulk in something higher-paying, a savings fund or even equities, that you can free up in three to seven days if you need to.

Wedge, for instance, you can withdrawal the money typically with you the next business day, so it can sit in that second layer without locking you up. The right framework depends entirely on your situation, and working that out is where good advice earns its keep. (More on how SortMe can help you build it, and connect you with an adviser if you want one, at the end.)

So I also asked someone who builds these products for a living. Dean Anderson is the CEO of Kernel Wealth, one of the NZ fund managers I'll come back to below, and I sent him a handful of blunt questions for this piece. His answers run all the way through it. The line that stuck with me was his reply when I described the SortMe user who's had $50,000 sitting in their everyday account for three years. He puts it this way:

"It's time to look outside your day-to-day bank. Globally we've seen the rise of fintech players able to offer better outcomes for customers, with a great user experience. Find a partner that can help you optimise your savings and investments so you can achieve your financial goals earlier."

Here's the thing most NZ households don't see: in 2026, the banks aren't the only game in town, and even within the banks there are big gaps depending on which product you pick.

App-based savings funds like Wedge and Kernel's Cash Plus, and a couple of the less-marketed notice-saver products, all sit at 2.8–3.0%, well above what ANZ, ASB, BNZ and Westpac advertise on their everyday savings pages (1)(4)(11). The friction used to be that the information lived in five different bank apps. With open banking and SortMe, that's no longer true.

Take a household with $50,000 sitting in an everyday account paying 0.10%. That's $50 a year in interest. Move it to a top PIE savings fund like Wedge (3.00%, next-business-day access) or to Westpac's Notice Saver (3.00%, with 32 days' notice) and you're earning roughly $1,080 a year after PIE tax. Kernel's Cash Plus Fund (2.83%) nets about $1,019. Any of them dwarfs the $50, and the move itself takes about ten minutes (4)(8)(10)(11).

TL;DR

• For cash you need this week: keep it in your everyday account. Don't overthink it.
• For cash you need this month and want a flat rate with no hoops: Wedge (~3.00%, PIE, next-day access) and Kernel Cash Plus (~2.83%, PIE, trade date + 1) are the leading savings funds; Heartland Digital Saver (~2.05%) or Sharesies Save (~2.30%) if you'd rather a standard bank-style account (1)(4)(6)(11).
• For cash you need within a few months and can give 32 days' notice: Westpac Notice Saver 32-day (~3.00%, and PIE-wrapped) is the standout bank rate. Heartland Notice Saver 32-day (~2.70%) is the runner-up if you'd rather avoid Westpac (1)(10).
• For cash you won't need for 3+ months and you're on 33% or 39% marginal tax: a PIE money-market fund, Wedge (~3.00%) or Kernel Cash Plus (~2.83% gross). After tax these beat every standard bank savings account, and sit alongside Westpac's (PIE) Notice Saver on headline yield (4)(8)(11).
• For cash you can leave alone 6–12 months or longer: a Kernel index fund (NZ 50, Global 100). Trade date + 2 settlement is a feature, not a bug, if you tend to raid your savings (4).
• For cash with a defined-date use: a term deposit, currently 3.45–3.65% at 6 months, 3.85–3.95% at 12 months (3).
• Where it doesn't belong: the everyday account, beyond two weeks of bills.

Rates are confirmed live on 19 Jun 2026 for Wedge, Kernel and Westpac Notice Saver; the rest of the matrix is as at 3 June 2026. All move with the OCR (currently held at 2.25%) (7). The matrix below is updated weekly. Confirm live before you move money.

Why this matters more in 2026 than it did two years ago

Two things shifted the maths.

First, the OCR has come down in stages from its 2024 peak and now sits at 2.25%, held there for three meetings in a row (7). Real returns on cash have followed it down (the days of 5%+ on a HISA are gone), but the gap between an everyday account (0.05–0.40%) and a top-of-market savings product (2.30–3.00%) is still wide enough that a few thousand dollars sitting in the wrong place costs you visible money over a year (1).

Second, the alternatives to banks are now genuinely usable. App-based "savings funds" (Wedge and Kernel's Cash Plus are the headline NZ examples) are low-fee, PIE-wrapped money market funds that pay a competitive gross yield, where the tax wrapper does the real work for higher earners (4)(11).

As Dean Anderson put it, the shift is partly an education curve: "the main thing is helping investors understand yield vs a set interest rate, and getting comfortable with the minor fluctuations of yield to achieve a higher return."

He's blunt about why so much money sits in the wrong place: "Often the on-call rates directly at a bank are incredibly low, or they come with plenty of hoops, such as no withdrawals, top-up requirements, bonus rates, etc." (13)

The combination matters because the friction was always the bottleneck. Most people knew the higher-yield products paid more. They didn't move the money because the information lived in a different app from the rest of their financial picture, and "I'll do it later" became "I never did".

The rates matrix (updated weekly)

Wedge, Kernel and Westpac Notice Saver rates confirmed live 19 Jun 2026; the remainder is as at 3 June 2026 (NZ afternoon), sourced from interest.co.nz (savings, bonus savings and term-deposit comparison pages) and live Kernel, Wedge and Sharesies product pages (1)(2)(3)(4)(6)(11). All rates are gross unless noted. PIE-wrapped products are taxed at your Prescribed Investor Rate (28% max), which beats marginal income tax for 33% and 39% earners (8). Settlement shorthand: "trade date + N" means the cash reaches your bank account N business days after you place the withdrawal or sale. Confirm live before moving money.

Cash and on-call (instant or near-instant access)

Term deposits (cash you can lock away: typical NZ bank ranges)

Index funds: for cash you can leave alone 6–12 months or more

Index funds aren't a substitute for a HISA on cash you might need this week. They're an option for cash you've decided you won't touch for six months or more. See the dedicated section below.

Bank High-Interest Savings Accounts: what to know in 30 seconds

The on-call and notice-saver products at the big NZ banks. The headline numbers hide three traps.

One: most "savings" accounts at the big four are paying under 1.0%. ASB Savings On Call is 0.10%. ANZ Online Savings is 0.40%. Westpac Simple Saver is 0.05% (1). If you've never made an active choice, that's likely where your money is.

Two: bonus-rate accounts (ANZ Serious Saver, BNZ Rapid Save, ASB Savings Plus, Westpac Bonus Saver) reward "don't touch it" behaviour. The total rate looks decent (1.25–1.60%), but make a withdrawal and you drop to the 0.05% base for the month (2). If you dip in regularly, the headline rate is fiction.

Three: notice savers are where the real bank yield is. Westpac Notice Saver 32-day pays 3.00%, the highest mainstream bank rate in the table, and unusually for a bank product it's structured as a PIE fund, so the tax is capped at 28% rather than your full marginal rate (more on why that matters below) (10). Heartland's 32-day and 90-day Notice Savers are 2.70% and 2.95% (standard tax). Kiwibank's 32-day is 1.80% (1). Same product category, very different rates. The trade-off is the notice period: you give up instant access in exchange for the rate.

Most bank savings interest is taxed at your full marginal rate. For someone on the 39% bracket, a standard, fully-taxed savings account at 3.00% gross returns just 1.83% after tax. A PIE-wrapped product at the same gross rate returns 2.16% after tax, about 18% more, for the same headline number (8). That's why the two standout on-call/short-notice options after tax are both PIEs: Wedge (3.00%, next-day access) and Westpac's Notice Saver (3.00%, 32-day notice). The PIE wrapper matters more the higher your marginal rate is.

If you're not sure which bank HISA to pick: do you need fast access? If no, go Westpac Notice Saver 32-day (3.00%) or Heartland Notice Saver (2.70%). If yes, the flat-rate winner is Wedge (3.00%, PIE, next-day access), or Heartland Digital Saver (2.05%) if you'd rather a plain bank account with no fund structure.

Money-market savings funds: Wedge and Kernel Cash Plus

This is the category that's changed most. A "savings fund" pairs the things you like about a bank account (a set-ish rate, near-on-call access, no minimums, a clean app) with the higher yields of the wholesale money market. Both of the NZ standouts are PIEs, so tax is capped at 28%. The trade-off, as the intro flagged: they're funds, not bank deposits, so they sit outside the Deposit Compensation Scheme (more below).

Wedge: the newest PIE savings fund

Wedge runs the Wedge Savings Fund, paying 3.00% p.a. (variable) with near-on-call access: request a withdrawal any time and the money is typically with you the next business day, with no notice period, no minimums, no bonus-rate hoops (11).

It's a PIE, so for a 39% tax bracket earner that 3.00% is worth about 2.16% net, the same headline as Westpac's Notice Saver, but without the 32-day wait, which makes it a much better fit for the second layer of an emergency-fund structure.

The money is backed by cash and fixed-interest assets with a weighted-average AA credit rating, higher than the big NZ banks, and the return accrues daily so you watch the balance tick up (11). Wedge is a licensed Managed Investment Scheme regulated by the FMA, supervised by NZ Guardian Trust, and was MoneyHub's 2026 Favourite High-Yield Savings Product (11)(12).

The one thing to understand: like any fund, it's not a bank deposit, so it isn't covered by the Deposit Compensation Scheme.

Kernel Cash Plus: a strong PIE option with a four-year track record

Kernel runs a PIE-wrapped money market fund whose projected yield currently sits around 2.83% (4). In Dean's words, it holds "short-term 'IOUs' from New Zealand banks, councils and companies, things like term deposits and short-dated loans that pay interest and are designed to be stable. The credit quality is solid, with over 80% of the fund sitting in investment-grade A-rated securities or better, and the whole thing is in NZ dollars with no currency risk." (13) The fund is "coming up four years old and has over $220m in assets", so it's not a new experiment (13).

Why Kernel built it alongside its plainer Smart Saver account, per Dean: "Globally there is a rise in 'money market' funds. These can offer investors higher yields than a standard call account, with a well-diversified mix of short-term fixed income and cash assets." The pattern he sees most is itself a layered structure: "someone putting their hard emergency-fund needs in the on-call account, available same-day, and then a buffer above that into the Cash Plus fund, given it can be a couple of days to access." (13)

Three things to know:

• PIE tax wrapper. Your tax is capped at 28% (your PIR), regardless of whether your income-tax marginal rate is 33% or 39% (8). For a 39% earner, Cash Plus's 2.83% gross translates to about 2.04% net, well ahead of any standard, fully-taxed bank savings account (a fully-taxed 2.83% would net just 1.73%). Against the other PIE products it's a closer call: Wedge and Westpac's Notice Saver both run 3.00% gross / ~2.16% net, a touch ahead of Cash Plus on headline. So the choice between them comes down to access, credit profile and which app you'll actually use, not just the after-tax number.
• Settlement is trade date + 1. You can withdraw any business day, and the money typically lands in your bank account the next day. Slightly slower than a bank-to-bank transfer, fast enough to be a real near-on-call product (4).
• Fees and minimums. The fund management fee is in Kernel's standard 0.25–0.50% range, baked into the published yield. Membership is free on Kernel's Core tier, there are no transaction fees on deposits or withdrawals, and no minimum to open (5).

Kernel also runs Smart Saver at 2.25%, a simpler online savings account with standard tax treatment (4).

An honest word on the tax wrapper, from Dean. For higher earners, the PIE is clearly worth it: "on a 2.25% gross rate, a 33% earner keeps 1.51% after tax outside a PIE, versus 1.62% inside one; for a 39% earner that gap widens to 1.37% versus 1.62%." But he's straight about who it doesn't help: "For someone on 30% or below, the PIE advantage largely disappears, and a notice saver or on-call account may be just as effective on a net basis." (13) If you're under the 33% bracket, chase the highest gross rate and don't agonise over the wrapper.

And the safety trade-off. Dean made a point worth repeating: a bank's on-call account is "covered in the Deposit Compensation Scheme, but a cash fund is not." (13) The Deposit Compensation Scheme protects up to $100,000 per depositor per licensed bank if the bank fails. Money-market funds like Wedge and Kernel Cash Plus aren't bank deposits, so they sit outside that scheme; you're relying on the fund's (high) credit quality instead. For most people parking short-term cash with AA/A-rated funds that's a sensible trade for the extra yield, but it's a real difference, and exactly the kind of risk-versus-reward call worth making deliberately.

Index funds as semi-liquid cash: the "out of spending reach" play

This is the one almost no NZ household considers, and it's the one I get the most quietly grateful messages about when I bring it up.

If you've got cash you've decided you won't touch for six to twelve months (a house deposit eighteen months out, a planned car upgrade next year, the deck rebuild that's been on the list for two years), you don't have to leave it earning 2.05% in a HISA. You can put it in an index fund (the NZ 50 Fund and Global 100 are the obvious starting points) through the likes of Kernel or Sharesies, where the historical average return over rolling 6–12-month periods is meaningfully higher (4).

The trade-off is volatility. In any given month, your balance can be down 5–10%. You have to be honest with yourself about whether you'd really leave it alone if the number drops the week before you need to spend it. Most people overestimate their tolerance until they see the number go red. If that's you, this isn't for you. Stick with the cash options above.

Here's the bit I want to highlight, because it's the part most people miss: trade date + 2 settlement is a feature. If your savings problem is that you raid the HISA at the end of every month for things you didn't plan to buy, having the money two trading days away from your eftpos card is a brake. The friction is doing budgeting work for you. The "I'll just move some over" impulse meets a 48-hour delay, and by the time the money lands the impulse has usually passed.

That's a real psychological feature for a real type of person. Kernel makes it concrete: open a fund, set a regular deposit, and treat the balance as something you check quarterly, not daily. Management fees are 0.25% on the NZ 50 and Global 100, and 0.50% on the High Growth Fund, among the lowest in the NZ market (5).

How to think about it:

• Cash you might need this month → a savings fund (Wedge or Kernel Cash Plus) or a flat-rate HISA, not an index fund.
• Cash you've decided you won't touch for 6–12+ months and can stomach a temporary 10% drawdown → Kernel index fund.
• Cash for a fixed-date goal inside 6 months → term deposit matching the term.

Sharesies offers the same broad mechanic (buy units in an ETF, redeem when you need cash), but the fee structure and the broader US-listed ETF options make it a different shape of decision (6). For NZ-resident investors with a "park it and forget it" goal, Kernel's PIE-wrapped local funds are usually the cleaner choice.

Term deposits: for cash you can lock away

A 6-month term deposit at the big banks pays 3.45–3.65% as of early June 2026. A 12-month sits at 3.85–3.95% (3). Non-bank deposit takers (Heartland, Co-op, Liberty, General Finance) go higher, up to 4.00% at 6 months and 4.65% at 12 months, though with lower credit ratings (3).

The trade-off with any term deposit is access: you can break one, but you'll forfeit most of the interest if you do.

Use a term deposit when you've got a defined date the money is needed: a deposit settling in March, school fees in February, a tax bill that hits in July. Don't use one as your emergency fund.

How to choose

Five questions you should ask yourself when considering where to stash your cash:

1. When might you need this money?

• This week → everyday account
• This month → Wedge (3.00%, next-day access) or a flat-rate HISA
• 32-day notice tolerable → Westpac Notice Saver (3.00%)
• 3+ months but flexible → Wedge or Kernel Cash Plus
• Defined date 3+ months out → term deposit matching the term
• 6–12+ months and you won't touch it → Kernel index fund

2. What's your marginal tax rate?

• 33% or 39% → strongly favour PIE-wrapped products (Wedge, Kernel Cash Plus, Westpac Notice Saver, Sharesies PIE Save, Kernel index funds) over standard bank HISAs
• Under 33% → as Dean says, the wrapper advantage largely disappears; the highest gross rate wins (8)(13)

3. Will you really leave it alone for a month?

• Yes → a notice saver or bonus account works
• No → a near-on-call PIE fund (Wedge) or flat-rate HISA
• If the issue is that you self-sabotage → an index fund with trade date + 2 settlement as a deliberate brake

4. How big is the pile?

• Under $10k → don't overthink it, pick any of the flat-rate options
• $10k–$50k → a PIE savings fund (Wedge or Kernel Cash Plus) is probably the answer for most people on 33%+ marginal rates
• $50k+ → split it: instant-access buffer in your bank, the rest in a savings fund, defined-date goals in term deposits, long-horizon money in index funds

5. Do you bank with the wrong place for this?

• If your everyday bank is ANZ (0.40% default) or ASB (0.10% default), the move isn't just to your bank's named savings product; it's to a higher-paying provider.
• Switching savings provider doesn't require switching everyday bank.

What SortMe shows you about this

Your SortMe dashboard already surfaces three things relevant to this decision:

• Account balances across every bank, so you see the cash pile as one number, not split across five bank apps. Kernel and Sharesies balances aggregate into the same view.
• The Cashflow Health Score, which factors in how much cash you're holding relative to your fortnightly burn. If it flags "high cash buffer", that's a soft signal you've got more in your everyday account than you need.
• Recommendations, the cashflow recommendations engine that surfaces the gap between what you're earning on cash and what a savings fund, notice saver or term deposit would pay. Across SortMe households that actioned this recommendation last quarter, the average move was around $14,200 shifted from everyday to a higher-yielding product, worth roughly $620 a year in extra interest per household (9).

And if you'd rather have a professional set the structure, not just the rate, SortMe can match you with a financial adviser. You bring the full picture (which SortMe already has in one place); they help you build the layered framework that fits your goals, your tax rate and your appetite for risk. For a lot of people, getting that structure right once is worth far more than chasing the last 0.2% of yield.

We don't move the money for you. SortMe is read-only on your bank and fund accounts. But seeing the gap is most of the battle. The transfer itself is a 90-second job inside your bank app, and the Wedge or Kernel sign-up is a ten-minute one-off.

What to do this week

Open SortMe. Look at your everyday account balance. If it's more than two weeks of your normal outgoings:

1. Decide which bucket the excess belongs to (instant-access buffer, this month, 3+ months, 6–12+ months, defined-date).
2. Pick the matching product from the rates matrix above. A PIE savings fund (Wedge or Kernel Cash Plus) is the default answer for most SortMe households on 33%+ marginal tax. Westpac Notice Saver 32-day is the best option if you're happy to give notice.
3. Open the app (Wedge and Kernel each take about ten minutes to set up) and move it.

Not sure how to layer it across an emergency buffer, short-term cash and longer-horizon money? That's a perfectly good reason to talk to an adviser, and SortMe can connect you with one. Then come back in a week and look at the Net Worth view. The interest line will start moving. Or, in Dean's words: it's time to look outside your day-to-day bank.

→ Open SortMe

Sources

1. Call and standard savings account rates, interest.co.nz — interest.co.nz/saving/call-account (rates as at 3 Jun 2026)
2. Bonus savings account rates, interest.co.nz — interest.co.nz/saving/bonus-savings-accounts (rates as at 3 Jun 2026)
3. Term deposit rates, interest.co.nz — interest.co.nz/saving/term-deposits-1-to-9-months (1–9 month and 1–5 year pages; rates as at 3 Jun 2026)
4. Save: Smart Saver and Cash Plus Fund, Kernel Wealth — kernelwealth.co.nz/save (rates confirmed live 19 Jun 2026)
5. Pricing: fund fees and membership tiers, Kernel Wealth — kernelwealth.co.nz/pricing
6. Save and PIE Save, Sharesies — sharesies.nz/save
7. Official Cash Rate, Reserve Bank of New Zealand — rbnz.govt.nz (held at 2.25%, as at Jun 2026)
8. Portfolio investment entities and prescribed investor rates, Inland Revenue — ird.govt.nz
9. Notice Saver (PIE fund), 32-day 3.00%, Westpac NZ — westpac.co.nz (confirmed live 19 Jun 2026)
10. Wedge Savings Fund, Wedge Money — wedgemoney.co.nz (3.00% PIE, ~1 business day access, AA weighted-average credit rating; confirmed live 19 Jun 2026)
11. Wedge review, MoneyHub — moneyhub.co.nz/wedge-review
12. Dean Anderson, CEO, Kernel Wealth — email correspondence with Carl Thompson, 11 Jun 2026