Marginal Tax Rate Calculator

This calculator shows your marginal and average income tax rates in New Zealand, along with your total tax, from your annual income. New Zealand uses a progressive tax system, where income is taxed in bands at increasing rates rather than a single flat rate. Your marginal tax rate is the rate that applies to your next dollar of income, the rate of your highest bracket, which matters for decisions like taking on extra work, a pay rise, or how investment income is taxed. Your average tax rate, by contrast, is your total tax divided by your total income, which is always lower than the marginal rate because the lower bands are taxed at lower rates. People often confuse the two, overestimating the tax on a pay rise by applying their average rate, or fearing that earning more will somehow leave them worse off, which progressive brackets never do. This tool clarifies it. You enter your annual income, and the calculator works out your total income tax by applying each bracket in turn, then shows your marginal rate, your average rate, and your income after tax. The results update as you type. Use it to understand the tax on a pay rise or bonus, to see your true average tax rate, or to plan around the brackets. The current brackets tax income at 10.5 percent up to $15,600, 17.5 percent to $53,500, 30 percent to $78,100, 33 percent to $180,000, and 39 percent above that. A key insight: only the income within each band is taxed at that band's rate, so crossing into a higher bracket never reduces your take-home pay, it simply means the portion above the threshold is taxed at the higher rate. This calculator shows income tax only and does not include the ACC earner levy or any tax credits.

Progressive brackets: 10.5% to $15,600, 17.5% to $53,500, 30% to $78,100, 33% to $180,000, 39% above. Income tax only; excludes ACC levy and tax credits.