Westpac Term Deposit Rates NZ: A Complete Guide for Kiwi Savers

If you’re weighing where to park a lump sum for a guaranteed return, a Westpac term deposit is one of the simplest options available to New Zealanders. Westpac is one of the country’s big-four banks (part of the Australian Westpac banking group, and long the Crown’s main banker), and its term deposits run from 30 days to five years. This guide explains how they work, your interest options, deposit protection, the tax, and how they stack up against other banks. It’s general information, not financial advice.

How Westpac term deposits work

A term deposit is a fixed-rate savings product: you commit a lump sum for a set period, and Westpac guarantees a specific interest rate for the whole term regardless of what the Reserve Bank does with the Official Cash Rate (OCR). At maturity you get your principal back plus the interest earned.

Westpac’s minimum is $5,000. That is higher than Kiwibank, Heartland Bank and Rabobank NZ, which all start at $1,000, and the same as ASB — while ANZ requires $10,000. Terms span 30 days to five years, with the three-month to two-year range the most popular. The deposit itself carries no account or setup fees.

Your interest options

How and when you’re paid depends on the term you choose:

• Short terms (under six months): interest is paid in full at maturity, along with your principal.
• Six months or longer: you can have interest paid monthly or quarterly into your everyday account — handy for topping up regular income such as NZ Super.
• Six months or longer: alternatively, you can compound the interest quarterly, so it is added to your balance and you earn interest on your interest. Over a multi-year term that compounding effect makes a real difference.

Deposit protection

Term deposits are among the safest places to hold money, and since 1 July 2025 they carry an extra layer: the Reserve Bank’s Depositor Compensation Scheme (DCS) protects up to $100,000 per depositor, per institution if a bank fails. Westpac’s eligible deposits are covered automatically. If you hold more than $100,000, spreading it across two banks keeps the full amount protected — a genuinely useful point for larger savers. The scheme is run by the Reserve Bank of New Zealand (rbnz.govt.nz/dcs).

Tax on your interest

Interest is taxable income, and Westpac deducts Resident Withholding Tax (RWT) at source. You nominate a rate that matches your income — 10.5%, 17.5%, 30%, 33% or 39%. Two points trip people up: if you give Westpac your IRD number but don’t choose a rate, the default deduction is 33%; if you don’t provide your IRD number at all, Westpac must deduct at the 45% no-notification rate. There is also no 28% RWT rate for individuals — 28% is the company rate. Our NZ tax rates guide sets out the brackets in full, and Inland Revenue explains how to pick the right rate (ird.govt.nz).

Higher earners may find Westpac’s Term PIE more tax-efficient: it is taxed at your Prescribed Investor Rate (PIR), capped at 28%, which can beat a standard term deposit on the same headline rate once you are in the top tax bands.

Westpac vs other banks

Westpac’s rates usually sit within a tight band of the other big-four banks (ANZ, BNZ, ASB) and Kiwibank — often no more than about 0.10–0.25% apart on a given term. That still matters on larger sums: a 0.20% gap on a $200,000 deposit is $400 a year in interest before tax.

Smaller registered banks such as Heartland Bank, Rabobank NZ and SBS Bank often pay a little more than the big four for equivalent terms. Because all of these are registered banks covered by the same DCS up to $100,000 since 1 July 2025, the extra yield isn’t automatically a sign of higher risk — though above the cap an institution’s credit rating still matters. The table below compares the minimums, terms and protection across the main providers.

For live rates across the whole market, rather than checking each bank one by one, see our term deposit rates comparison or an independent tracker such as interest.co.nz; our BNZ term deposit guide covers a direct big-four alternative in detail.

Many savers still choose Westpac for practical reasons — funds already sitting in a Westpac account, managing everything through Westpac One, branch access and brand familiarity. Those are legitimate, but they shouldn’t stop you doing a quick rate check at maturity: auto-rolling at a stale rate rather than actively choosing the best available rate adds up over the years.

Setting one up

If you’re already a customer it’s quick: log in to Westpac One (or visit a branch), go to Term Deposits, choose your amount (from $5,000) and source account, pick your term and interest option, and — importantly — set your maturity instructions. Rather than auto-roll, choose to be contacted for instructions or set a maturity reminder, so you can shop around or negotiate before your money is locked in again. New customers can open an everyday account and a term deposit together, though identity verification adds time; our Westpac online banking guide covers the digital setup.

Breaking a term deposit early

Westpac will generally allow an early break, but there’s a cost: the more of the term still to run, the greater the interest reduction, and breaking very early can forfeit most or all of the interest earned. For a genuine emergency it’s almost always worth it; for a non-urgent reason — like spotting a slightly better rate elsewhere — the penalty usually outweighs the gain. If you think you might need access, plan ahead: keep an emergency buffer in an at-call high-interest savings account, start with a shorter term, or ladder across several terms so a portion always matures soon.

Is a Westpac term deposit right for you?

A term deposit suits savers who have a lump sum they won’t need for the term, want a guaranteed return rather than market risk, and value simplicity. It’s less suitable if you need regular access to your capital, have a very long horizon (where growth assets may fit better), or would be better off in a PIE-structured product for tax reasons. As always, the best deposit is the one with the right rate for your term: check the live rate on westpac.co.nz, compare a couple of alternatives, confirm your IRD number and RWT rate, and set your maturity instructions before you commit. For a wider view of saving strategy, the Retirement Commission’s Sorted has free, independent guides (sorted.org.nz).

Disclaimer

This article is general information about Westpac term deposits in New Zealand — not financial or tax advice, and not a recommendation of any product. Interest rates, tax rules, minimums and deposit-protection details change; the figures here reflect September 2026 and should be confirmed with Westpac, Inland Revenue and the Reserve Bank before you act. For current rates see westpac.co.nz or interest.co.nz; for deposit protection see the Reserve Bank (rbnz.govt.nz/dcs). If money worries are affecting you, free and confidential help is available from MoneyTalks on 0800 345 123.

Frequently asked questions

What’s the minimum for a Westpac term deposit?

$5,000. Terms run from 30 days to five years, and the deposit itself is fee-free. Some banks accept smaller deposits — Kiwibank, Heartland and Rabobank start at $1,000 — while ANZ requires $10,000 and ASB matches Westpac at $5,000.

How is Westpac term deposit interest taxed?

Westpac deducts Resident Withholding Tax (RWT) at source at the rate you nominate (10.5% to 39%, matching your income). If you give your IRD number but no rate, the default is 33%; if you don’t give your IRD number, it’s 45%. Higher earners can consider a Westpac Term PIE, taxed at a Prescribed Investor Rate capped at 28%.

Is my Westpac term deposit protected if the bank fails?

Yes, up to $100,000 per depositor under the Depositor Compensation Scheme, which has applied to New Zealand banks since 1 July 2025. If you hold more than $100,000, spreading it across two banks keeps it all protected.

Can I get my interest paid regularly?

Yes. On terms of six months or longer you can have interest paid monthly or quarterly — useful for supplementing income such as NZ Super. On shorter terms it’s paid at maturity, and six-month-plus terms can instead be compounded quarterly to grow faster.

Does Westpac have the best term deposit rates?

Not always. Its rates sit close to the other big-four banks, and smaller registered banks like Heartland, Rabobank and SBS often pay a little more. Even a small difference matters on a large sum, so compare current rates before locking in.