Self Employed Tax Calculator NZ

Why use our calculator?

How the self employed tax system works

How to calculate your self employed tax in NZ

Working out your tax as an independent contractor or sole trader can feel overwhelming. Unlike a salaried employee who has tax sorted automatically every payday, you are fully responsible for your own accounting, and there is no tax free threshold in New Zealand, so you owe income tax from the very first dollar of profit.

This free self employed tax calculator gives you an instant estimate of your take home pay. You enter your gross income and estimated business expenses, and it works out your net profit, applies the correct income tax brackets, and shows an estimate of your ACC earners levy. It is built for the 2026/2027 tax year that runs from 1 April 2026 to 31 March 2027.

When you work for yourself in New Zealand, your total bill is made up of three main parts. Your income tax rate is set by Inland Revenue and is exactly the same as it is for employees:

• Income tax calculated on your net profit
• ACC levies to cover accident compensation, including the earners levy plus a work levy that varies by industry
• Goods and services tax if your annual turnover goes over the $60,000 threshold

The calculator uses the official 2026/2027 tax brackets. Each dollar is only taxed at the rate for the band it falls into, so a higher rate never applies to your whole income. If you are still unsure whether you count as self employed at all, the IRD guide for the self employed and sole traders is a good place to start, and our own guide on contractors versus employees explains the legal difference in plain English.

If your revenue is getting close to the $60,000 mark, you must register for GST within 21 days of going over it. The rolling test is unpacked in our $60,000 GST threshold guide, and the registration steps sit in register for GST in NZ. You can use our GST calculator or the reverse GST calculator to add or remove 15% GST from your invoices, and the GST invoice generator to raise a compliant tax invoice. For the full picture read our ultimate guide to GST in New Zealand. If your client already deducts tax from your pay under schedular rules, use the withholding tax calculator instead.

ACC levies for the self employed

ACC is the part most new sole traders forget. On top of income tax you pay ACC levies on your self employed income, and there is more than one. The earners levy for 2026/27 is 1.75% of your liable earnings, charged on income up to a cap of $156,641, for a maximum earners levy of $2,741.22. The calculator above shows this earners levy portion.

Your real ACC invoice will usually be higher, because self employed people also pay a work levy that changes depending on your industry risk classification, plus a small working safer levy. ACC sends you a separate annual invoice for these, based on the income figures that IRD passes to them. You can see how the levies are built up and check your classification unit on the ACC levies for the self employed page. Treat the ACC number in this tool as a floor, not the final figure.

Common tax mistakes for NZ sole traders

This calculator helps you avoid the biggest issue, which is failing to save enough for tax, but there are other traps worth knowing. It also pays to review the 10 common GST mistakes in NZ so you do not get caught out once you register.

The golden rule for tradies and independent contractors, which you can read more about in our guide on GST for contractors in NZ, is to set aside 25% to 30% of everything you earn into a separate bank account. That buffer covers your income tax and ACC levies, and it also gives you a head start on provisional tax if you get pushed into it. If you also draw a wage from a company, compare the take home on the salary and wage tax calculator.

The first year tax free myth explained

A very common question among new gig economy workers is whether the first year in business is tax free. This is a dangerous myth. Your first year of self employment is never tax free. You owe income tax on every dollar of profit you make from day one. Gig platform rules are covered in Uber and gig economy GST rules, and new operators can follow the new business GST compliance roadmap.

Real life tax scenarios

These scenarios show income tax and the ACC earners levy only. In real life Mike would also get a work levy invoice from ACC based on his trade classification, so his total set aside should be a little higher. Both examples also sit under $60,000 of profit, but Mike's turnover before expenses is $90,000, so he is over the GST threshold and must be registered for GST.

Filing deadlines and key local dates

Missing an Inland Revenue deadline leads to penalties and interest, so it pays to memorise these dates for the financial year that runs from 1 April to 31 March. You file your annual return using the IR3 individual income tax return in myIR. GST and provisional due dates are also listed on our GST tax due date calendar.

Other things that affect your take home pay

This calculator focuses on income tax and the ACC earners levy, but a few extra obligations and credits can change your final number. If you have a student loan and earn over the annual repayment threshold of $24,128 for 2026/27, you repay 12% of every dollar above it, on top of your tax. Details are on the IRD student loans pages.

On the credit side, if your income is between $24,000 and $70,000 you may qualify for the independent earner tax credit of up to $520 a year, which is applied when you file. KiwiSaver is optional when you are self employed, and there is no employer to match you, but if you contribute at least $1,042.86 between 1 July and 30 June you still receive the government contribution of up to $260.72, provided your taxable income is $180,000 or less.

Frequently asked questions