New Zealand Compound Interest Calculator

The Depositor Compensation Scheme (DCS) is New Zealand's government-backed deposit protection. Effective from 1 July 2025, it protects eligible deposits up to NZD 100,000 per depositor per licensed deposit taker if the deposit taker fails.

The scheme was introduced under the Deposit Takers Act 2023 and is administered by the Reserve Bank of New Zealand. Coverage is automatic — no application needed. The scheme is funded by levies on deposit takers, not by depositors.

The DCS covers NZD deposits in eligible accounts at licensed deposit takers, including:

• Transaction accounts
• Savings accounts (call and notice)
• Term deposits
• Some PIE term deposits (where structured as deposits)

Not covered: KiwiSaver, managed funds, shares, money lost through scams or fraud, deposits in foreign currency, and government-agency deposits. Speak with your deposit taker to confirm whether a specific product is DCS-protected.

For joint accounts, each account holder is protected up to NZD 100,000. So a joint account between two people has total protection of NZD 200,000 (NZD 100,000 each) at that deposit taker.

DCS coverage is per depositor per licensed deposit taker. Splitting savings across multiple deposit takers under different licences increases total protection. Each holder's share at one deposit taker is also aggregated with their other deposits there — once you exceed NZD 100,000 in total at a single deposit taker, the excess is unprotected.

A PIE (Portfolio Investment Entity) term deposit is a term deposit wrapped in a fund structure. Instead of being taxed via Resident Withholding Tax (RWT) at up to 39%, interest is taxed at your Prescribed Investor Rate (PIR), capped at 28%.

For higher earners (income over NZD 78,100, RWT 33%; or over NZD 180,000, RWT 39%) this can be a meaningful saving — typically 5% to 11% on the gross interest. PIE term deposits are still DCS-protected when offered by licensed deposit takers and structured as deposits.

High-interest savings accounts from major NZ banks (ANZ Online Saver, ASB Savings Plus, BNZ Rapid Save, Westpac Online Saver, Kiwibank Notice Saver) and challengers (Heartland, Rabobank, Squirrel) often advertise headline rates that require specific conditions:

• Regular monthly deposits without withdrawals
• Minimum balance levels
• No withdrawals in the bonus period
• Holding accounts in a specific configuration

Without meeting these, the base rate may be just 0.10–1.00% p.a. Always check the conditions before comparing rates, and remember RWT is deducted from interest.

From 1 April 2026, the default minimum KiwiSaver contribution rate rises from 3% to 3.5% for both employees and employers. A further increase to 4% is scheduled for 1 April 2028.

If you're currently on the default 3% rate, both your contribution and your employer's will rise automatically — no action needed. If you're already contributing more than 3% (for example 4%, 6%, 8% or 10%), your rate doesn't change, but your employer's contribution rises to at least 3.5%.

Employees can apply to IRD for a temporary rate reduction back to 3% (3 to 12 months), available from 1 February 2026. Employers may match or stay at 3.5%.

From 1 July 2025, the government KiwiSaver contribution is 25 cents per NZ$1 you contribute, up to a maximum of NZD 260.72 per year (down from the previous 50¢ per NZ$1 / NZD 521.43).

To receive the maximum, you need to contribute at least NZD 1,042.86 per KiwiSaver year (1 July to 30 June). Members earning NZD 180,000 or more are no longer eligible from 1 July 2025. From the same date, 16- and 17-year-olds are now eligible for the government contribution if they meet other criteria.

KiwiSaver schemes are Portfolio Investment Entities (PIEs), so investment returns are taxed at your Prescribed Investor Rate (PIR) rather than your marginal income tax rate. Possible PIR rates:

• 10.5% — taxable income up to NZD 14,000 (or PIE+income up to NZD 48,000)
• 17.5% — taxable income NZD 14,001–48,000 (or PIE+income up to NZD 70,000)
• 28% — taxable income over NZD 48,000 OR PIE+income over NZD 70,000

Default is 28%. The PIR caps at 28% — even if your marginal rate is 33% or 39%, KiwiSaver returns are taxed at the lower rate. Always confirm your correct PIR with your provider — overpaid PIE tax is generally not refundable.

KiwiSaver is generally locked until age 65 (the same age as NZ Superannuation). Earlier withdrawals are allowed in specific situations:

• First home purchase — after 3+ years of membership, leave at least NZD 1,000 in the account
• Significant financial hardship — application to scheme provider, evidence required
• Serious illness — including reduced life expectancy
• Permanent emigration (excluding Australia) — after 12 months overseas; KiwiSaver to Australia transfer rules apply
• Death — paid to estate

If you joined KiwiSaver after 1 July 2019, the previous 5-year extension rule no longer applies — you can withdraw at 65 in full.

Funds are categorised by mix of growth (shares, listed property) versus income (bonds, cash) assets. Common categories:

• Defensive / Conservative — 0–35% growth, low volatility, lower long-term returns (3–5% p.a.)
• Balanced — 40–60% growth, moderate volatility (5–7% p.a.)
• Growth — 60–80% growth, higher volatility but stronger long-term returns (7–9% p.a.)
• Aggressive — 80–100% growth, highest volatility (8–10% p.a.)

The right fund depends on your time horizon and risk tolerance. Younger members with decades until 65 typically benefit from higher-growth funds. Members within 5–10 years of withdrawal may shift toward more defensive options to reduce sequence-of-returns risk.

RWT is tax deducted from your interest earnings before you receive them. NZ residents can choose a rate matching their income tax bracket: 10.5%, 17.5%, 30%, 33%, or 39%. The right rate depends on your total annual income.

If you don't provide an IRD number, the default rate is 45% — choose your correct rate to avoid overpaying. RWT applies to interest from bank deposits, term deposits, debentures, and some other interest-bearing investments. PIE income (including KiwiSaver) uses the separate PIR system instead.

New Zealand has no general capital gains tax. Most gains from selling shares, ETFs, gold, listed property, or NZ-domiciled managed funds are not taxed for ordinary investors.

However, several specific situations are taxable:

• Bright-line test — residential property sold within 2 years (sales on/after 1 July 2024)
• Trader/dealer status — if you buy specifically with intent to sell at profit
• Cryptocurrency — IRD treats as property; gains generally taxable
• Foreign Investment Fund (FIF) rules — direct foreign shares with cost over NZD 50,000
• Frequent trading — patterns can trigger trader classification

Dividends from NZ-listed shares are taxed as income. However, NZ dividends usually come with imputation credits — credits for the corporate tax (28%) the company has already paid. Imputation credits offset your personal tax liability on the dividend.

RWT of 33% is typically deducted at the dividend payment date (for "fully imputed" dividends, this means an additional 5% over the 28% imputation). You square up at year-end on your tax return — extra refund or extra tax owed depending on your marginal rate. Australian franking credits don't work for NZ tax purposes.

Interest from joint accounts is split equally between all account holders who provide valid IRD numbers, with each share counting toward their individual tax obligations.

Joint accounts can use only one RWT rate — typically the highest applicable rate to ensure compliance. If one holder is a non-resident, RWT must generally be deducted from all interest paid on the account at the non-resident rate. For DCS protection purposes, each holder is separately protected up to NZD 100,000.

Inflation reduces the real value of money over time. The Reserve Bank of New Zealand targets 1–3% inflation, with a focus on the 2% midpoint. Headline inflation was 3.1% (April 2026) and was forecast to rise to 4.2% in the June 2026 quarter due to global energy price pressures.

Over 20 years at 2.5% average inflation, NZ$100 today has the equivalent purchasing power of around NZ$61. Investments that have historically outpaced NZ inflation include diversified equities (NZX 50 long-term ≈ 9–10% with dividends), Growth KiwiSaver (~7–9%), and listed property (~5–8%) — though all carry varying levels of risk.