New Zealand has no tax-free threshold, unlike Australia or the UK. Your very first dollar of income is taxed, starting at 10.5%, then stepping up through 17.5%, 30%, 33%, and finally 39% above $180,000. Each bracket only taxes the slice of income sitting inside it, so your effective rate always sits below your top marginal rate, but there's no equivalent to the first tax-free chunk workers get elsewhere.
The ACC Earner's Levy is a separate, flat 1.75% charge that funds New Zealand's no-fault accident compensation scheme, deducted automatically alongside income tax up to a $156,641 earnings cap. It's not optional and it's not part of the income tax calculation, it's layered on afterward.
KiwiSaver is the one deduction here you actually control. Unlike Australian superannuation, which your employer pays on top of your salary, your KiwiSaver employee contribution comes straight out of your own gross pay before it reaches your bank account, so choosing a higher rate (up to 10%) genuinely reduces your take-home today in exchange for a bigger retirement balance. Your employer separately contributes at least 3.5% on top, which doesn't touch your pay at all.