Term Deposits vs Savings Accounts: Which Is Best for Your Money?

The core difference is simple. A term deposit locks your money for a fixed period — 30 days up to five years — in exchange for a guaranteed interest rate. A savings account lets you access your money whenever you want, and the interest rate can change at any time. The right choice depends on whether you need the money to be available on short notice and what you are saving it for.

When a Term Deposit Makes Sense

A term deposit is the right choice when you know you will not need the money for a defined period. Say you have NZ$20,000 set aside for a house deposit you plan to use in eighteen months. A term deposit at current rates offers a guaranteed return with no risk of the rate dropping mid-term. You know exactly how much interest you will earn.

Rates are tiered by term length. Shorter terms — three to six months — typically offer lower rates than twelve-month to three-year terms. Comparing across banks matters: the difference between the highest and lowest rate on the same term length is often 0.50% to 0.75%. On NZ$50,000 over twelve months, that is worth NZ$250 to NZ$375.

Term deposits are ideal for emergency funds only if you have staged them across multiple maturities — a practice called laddering — so some portion becomes available at regular intervals. Putting the full emergency fund into a single three-year term deposit is a mistake.

The compounding difference is also worth understanding. Most term deposits pay interest at maturity rather than compounding. If you reinvest the interest when the term deposit matures, you get compound growth. If the interest is paid into your transaction account and spent, you get simple interest only. Some banks offer interest-paying term deposits where the interest is credited monthly to your transaction account. The choice between reinvesting versus taking the interest as income affects your effective return.

When a Savings Account Makes Sense

A savings account is the right choice when you need flexibility. The trade-off is a variable rate that can be changed by the bank at any time. On-call savings accounts in New Zealand currently pay roughly 1.25% to 1.50% unconditional. An unconditional rate — no conditions to meet for the bonus — is worth seeking out. Kiwibank's Online Call account at 1.50% with no conditions is better than a 2.00% bonus rate where you forfeit the bonus if you make a withdrawal.

Notice saver accounts sit between the two — higher rates than on-call, but you must give 30 to 90 days notice before withdrawing. Heartland Bank pays 2.95% on 90-day notice. Rabobank pays 2.55% on 60-day notice. Kiwibank pays 2.35% on 90-day notice with the added benefit of a PIE structure capping tax at 28%.

Bonus saver accounts are the most common but the least attractive option in practice. The headline rate — say 2.50% — looks competitive until you read the terms. The bonus is only paid if you deposit at least NZ$20 that month and make no withdrawals. One missed month costs you the entire bonus for that period. Over a year, the effective rate is closer to the base rate of 0.50% unless you are disciplined about meeting the conditions every single month.

The Mixed Strategy

The optimal approach is rarely one or the other. Keep an on-call savings balance equal to three months of expenses in an account with unconditional interest — Kiwibank Online Call is the simplest option. Put money you will not need for six months or more into a notice saver or a laddered term deposit series. The emergency fund stays liquid. The rest earns a higher rate.

A laddered term deposit strategy looks like this: divide your savings into five equal portions. Put one portion into a six-month term deposit, one into twelve months, one into eighteen months, one into twenty-four months, and one into thirty-six months. When each term deposit matures, reinvest it into the longest term again. Over time, you have a portion maturing every six months, giving you regular access to some of your savings while the rest earns the premium for longer-term deposits.

For someone currently sitting entirely in an on-call savings account, shifting some of their balance into a term deposit at the current market rate typically makes a meaningful difference — especially if the on-call rate is near the bottom of the market. The exact difference depends on the rates available at the time, which change regularly. The ValueHub term deposit comparison page shows current live rates across all major banks.

Tax Considerations

Interest from both term deposits and savings accounts is taxable as income at your marginal tax rate. For savers on higher tax brackets, the pre-tax headline rate is not what you keep — the after-tax return is what matters. For example, at a 33% marginal rate, a term deposit earning 5.00% effectively returns 3.35% after tax. The same calculation applies to savings account interest.

PIE savings accounts tax interest at a capped rate of 28%, which benefits higher-rate taxpayers. If your marginal tax rate is 33% or 39%, a PIE account with a slightly lower headline rate can deliver a better after-tax return than a non-PIE account with a higher headline rate. Always check whether an account is PIE or non-PIE when comparing rate offers.

Work out your returns: Use our Term Deposit Calculator to compare returns across different terms and amounts.