AUCKLAND: Kiwibank has lifted its one-year Term Deposit rate from 3.90 per cent to 4.00 per cent per annum, giving New Zealand households another reason to take a closer look at where their savings are sitting.
The new rate takes effect from Monday, 17 August 2026, and applies to term deposits of $1,000 or more, according to information provided by Kiwibank to Webfit News.
The increase itself is only 0.10 percentage points, but the bigger story is what it means for savers.
For someone building a first-home deposit, putting money aside for university, holding an emergency fund, or simply trying to stop savings from losing value to inflation, a term deposit can provide certainty.
The key is understanding what 4 per cent actually gives you, how tax affects the return, how Kiwibank compares with the wider market, and whether locking the money away suits your plans.
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What does 4 per cent actually put in your pocket?
A 4.00 per cent advertised rate is the gross return before tax.
Here are some simple examples for a one-year term deposit.
| Amount deposited | Gross interest at 4.00% | Approx. interest after 17.5% RWT | Approx. interest after 30% RWT | Approx. interest after 33% RWT |
|---|---|---|---|---|
| $5,000 | $200 | $165 | $140 | $134 |
| $10,000 | $400 | $330 | $280 | $268 |
| $25,000 | $1,000 | $825 | $700 | $670 |
| $50,000 | $2,000 | $1,650 | $1,400 | $1,340 |
| $100,000 | $4,000 | $3,300 | $2,800 | $2,680 |
These are simplified examples and your actual tax treatment depends on your individual circumstances.
The important point is that a saver with $50,000 does not simply walk away with $2,000. At a 33 per cent RWT rate, the after-tax interest would be about $1,340.
That works out at roughly $112 a month in after-tax interest when averaged across the year.
Does the extra 0.10 per cent really matter?
Not by itself.
The difference between Kiwibank’s old 3.90 per cent rate and the new 4.00 per cent rate looks like this:
| Deposit | Interest at 3.90% | Interest at 4.00% | Extra gross interest |
|---|---|---|---|
| $10,000 | $390 | $400 | $10 |
| $25,000 | $975 | $1,000 | $25 |
| $50,000 | $1,950 | $2,000 | $50 |
| $100,000 | $3,900 | $4,000 | $100 |
So no, the rate increase itself is not life-changing.
But that is not really the lesson here.
The lesson is that savers should compare rates and stop treating their existing bank account as the automatic home for all their cash.
Leaving $50,000 in an account earning close to zero while a one-year deposit offers around 4 per cent could mean giving up close to $2,000 in gross annual interest.
How does 4 per cent compare with the market?
The wider New Zealand market has been moving higher.
Reserve Bank data shows the average advertised one-year term deposit rate across registered banks for deposits of at least $10,000 had climbed from 3.58 per cent in February 2026 to 3.85 per cent by June.
Westpac was advertising a 12-month term deposit rate of 3.90 per cent after its late-July rate changes.
That means Kiwibank’s new 4.00 per cent rate sits above the most recently published banking-sector average and slightly above Westpac’s recent 12-month advertised rate. Rates can change quickly, so anyone moving a large amount should check the live rate on the day they invest.
A saver comparing term deposits should look at more than the headline percentage.
| What to compare | Why it matters |
|---|---|
| Interest rate | Determines the gross return |
| Minimum deposit | Kiwibank’s new rate starts from $1,000 |
| Term length | Money may be inaccessible for the full term |
| Early withdrawal rules | Breaking the deposit can reduce interest or delay access |
| Interest payment frequency | Monthly, annually or at maturity can affect cash flow |
| DCS protection | Check whether the specific account is protected |
| Tax treatment | RWT reduces the amount you actually keep |
Saving for a first home? Do not lock everything away
Suppose a couple has saved $60,000 towards a first home.
They think they may buy in about a year, but they also want emergency access to some cash.
Putting the entire $60,000 into one 12-month term deposit may be unnecessarily rigid.
A more practical structure could look like this:
| Purpose | Amount | Possible approach |
|---|---|---|
| Emergency fund | $10,000 | Keep accessible in a savings account |
| House deposit portion | $30,000 | 12-month term deposit |
| Flexible house funds | $10,000 | Shorter term deposit |
| Legal, moving and inspection costs | $10,000 | Keep accessible |
If $30,000 were placed at 4 per cent for a year, it would produce about $1,200 gross interest.
Meanwhile the couple would still have $30,000 available or maturing sooner.
The point is not that this exact split suits everyone. It is that liquidity matters.
If you expect to make an offer on a house in three months, locking every dollar away for twelve months simply to earn a slightly higher rate can become expensive and inconvenient.
Parents saving for university can use the same idea
Consider parents who have $30,000 saved for a child’s future tertiary costs.
If the student starts university next year, the family may want certainty rather than exposure to market swings.
One possible approach:
| Money needed | Timing | Possible treatment |
|---|---|---|
| $8,000 | Within 6 months | Keep accessible |
| $10,000 | In 12 months | 12-month term deposit |
| $12,000 | In 18 to 24 months | Consider staggered deposits |
This is often called a term-deposit ladder.
Instead of everything maturing at once, different portions become available at different times.
That can be useful for tuition fees, rent, accommodation deposits or other predictable expenses.
What if you have $100,000 or more?
This is where New Zealand’s Depositor Compensation Scheme becomes particularly relevant.
The scheme has operated since 1 July 2025 and protects eligible deposits up to $100,000 per depositor, per deposit taker if the institution fails. Term deposits can be covered when held in a DCS-protected account.
For example:
| Situation | DCS position |
|---|---|
| $80,000 in protected deposits at Bank A | Up to $80,000 covered |
| $100,000 at Bank A | Up to $100,000 covered |
| $140,000 at Bank A | Up to $100,000 covered |
| $90,000 at Bank A and $90,000 at Bank B | Potentially up to $90,000 at each, if both are eligible |
The Reserve Bank stresses that the protection applies per depositor, per deposit taker, and not every product offered by a participating institution is necessarily protected.
That means somebody with large cash savings should check the protection status before chasing a higher return.
Why are term deposit rates rising?
Bank deposit rates do not move only because of the Official Cash Rate.
Banks also respond to wholesale funding costs and competition for customer deposits.
Westpac said in July that higher wholesale rates had pushed up its funding costs, prompting it to increase a number of both lending and deposit rates.
The Reserve Bank’s own data shows the average one-year term deposit rate has been gradually moving upward through 2026, from 3.58 per cent in February to 3.85 per cent in June.
For savers, that means today’s 4 per cent rate should be treated as a current opportunity, not a permanent one.
Rates can go higher.
They can also fall.
What should a normal household actually do?
Here is a simple decision guide.
| Your situation | What may make sense |
|---|---|
| Need the money within 3 months | Keep most of it accessible |
| Need it in 6 to 12 months | Compare shorter and one-year deposits |
| Saving for a home 12 to 18 months away | Consider splitting accessible cash and term deposits |
| Saving for university in 2 years | Consider staggered maturity dates |
| Have more than $100,000 cash | Check DCS coverage and concentration |
| No emergency fund | Build accessible cash before locking everything away |
| Carry expensive credit card debt | Paying that down may beat earning 4% on savings |
That last point is important.
If you are paying 15, 20 or 25 per cent interest on consumer debt, earning 4 per cent on a term deposit while carrying that debt usually makes little mathematical sense.
A term deposit is useful when the money genuinely has a savings purpose.
And then there is the election
New Zealand’s general election will be held on Saturday, 7 November 2026.
That matters because household finances will inevitably become a major campaign issue.
Voters should expect political arguments over tax, KiwiSaver, housing, government spending, cost of living and economic growth.
But savers should be careful about making financial decisions based on election slogans.
A promise to reduce tax may increase disposable income.
A housing policy may affect supply or demand.
Changes to KiwiSaver could affect long-term savings.
Government spending decisions may influence inflation, which in turn can affect interest rates.
The useful question for an ordinary household is not simply, “Which party is promising me more?”
It is:
What happens to my income, tax, mortgage, rent, savings and cost of living after the policy is implemented?
That is the real household balance sheet.
The bigger lesson from Kiwibank’s 4 per cent rate
Kiwibank’s increase from 3.90 per cent to 4.00 per cent is modest.
For a $10,000 deposit, the change itself adds only $10 in gross interest over a year.
But the announcement is still useful because it reminds households to review cash that may have been sitting untouched for years.
A family with $50,000, $75,000 or $100,000 saved for a house, university, a business or retirement should know:
- what interest rate it is earning
- how much tax will be deducted
- when the money will be needed
- whether it is covered by the DCS
- what happens if the deposit must be broken early
- whether another institution offers a materially better deal
At 4 per cent, a term deposit will not produce spectacular wealth.
That is not its job.
Its job is to give a saver a known return on money they do not need immediately.
For New Zealand households dealing with an uncertain economy and an election campaign that will produce plenty of promises about making people better off, knowing exactly what your own money is doing may be one of the more useful places to start.
