Self-Employed Tax Guide NZ 2026 — Sole Traders & Contractors

If you work for yourself in New Zealand — as a sole trader, freelancer, contractor, or small business owner — your tax obligations are fundamentally different from an employee’s. There is no employer withholding PAYE on your behalf; you are responsible for calculating, saving, and paying your own tax. This guide covers everything you need to know.

Who Is Considered Self-Employed in NZ?

You are self-employed if you earn income from a business or trade and are not an employee. This includes:

• Sole traders — operating a business in your own name (no separate legal entity)
• Contractors — providing services to clients under a contract for services (not employment)
• Freelancers — writers, designers, developers, consultants billing clients
• Gig workers: people paid through platforms such as Uber, Uber Eats, Airbnb or Fiverr who are treated as self-employed (whether you are self-employed or an employee depends on the real nature of the relationship, not the label)
• Partners in a partnership — taxed on your share of partnership income

Working through a company is different — the company pays tax at 28%, and you pay tax on any salary or dividends drawn from it. This guide focuses on self-employed individuals operating as sole traders.

Your Key Tax Obligations

As a self-employed person, you have up to four tax obligations depending on your situation:

Income Tax: The Basics

Self-employed income is taxed at the same progressive rates as employee income:

The difference is that no employer deducts tax on your behalf. You calculate taxable income as:

Taxable income = Total revenue − Allowable business expenses

Common deductible expenses include rent (home office proportion), vehicle costs, equipment, software, professional development, accounting fees, and professional subscriptions. See our Business Expenses You Can Claim guide for the full list.

Provisional Tax

Once your tax bill exceeds $5,000 in a year, IRD requires you to pay provisional tax — advance instalments of your estimated tax for the next year. There are three standard instalment dates:

The standard method bases instalments on last year’s tax. The estimation method lets you base payments on what you expect to earn this year — useful if income has dropped significantly. The ratio method ties provisional tax to your GST returns.

See our Provisional Tax Explained guide for full details.

GST

If your turnover from your taxable activity was at least $60,000 in the last 12 months, or you expect it to be at least $60,000 in the next 12 months, you must register for GST and charge 15% on your invoices.

Once registered, you:

• Add 15% GST to your invoices (collected from clients)
• File GST returns (monthly, 2-monthly, or 6-monthly)
• Pay IRD the difference between GST collected and GST paid on business expenses

Voluntary registration is allowed below $60,000 — beneficial if your clients are GST-registered businesses (they can claim your GST back). Not beneficial for consumer-facing businesses.

Filing Your IR3 Return

Every self-employed person must file an IR3 income tax return by:

• 7 July — if filing yourself
• 31 March the following year — if using a registered tax agent

Your IR3 declares all income and expenses. If you have untaxed business income, IRD’s IR3 instructions list the IR10 (Financial Statements Summary) as a form you may need to fill out, and IRD says completing it speeds up the processing of your return. The IR10 form itself is not mandatory.

Key sections of your IR3:

1. Business income — total revenue from your business
2. Business expenses — allowable deductions (reduces your taxable income)
3. Other income — interest, dividends, rental income if any
4. Tax credits — charitable donations, IETC if applicable
5. Student loan — if you have a student loan balance

IRD pre-populates some data (bank interest, some contractor withholding) but business income and expenses are always entered manually.

ACC Levies for Self-Employed

Self-employed people pay ACC levies differently from employees:

• ACC earner levy: Same as employees — 1.75% of income up to $156,641 (2026–27 rate; up from 1.67% up to $152,790 for 2025–26)
• ACC Work levy: A separate levy whose rate is different for every business. ACC bases it on the risk of injury at work, your claims history and your liable income. ACC invoices it separately, after IRD shares your return information with ACC.

KiwiSaver for Self-Employed

As a self-employed person, KiwiSaver is voluntary — no employer makes contributions. However, you can still:

• Make voluntary contributions directly to your KiwiSaver provider
• Receive the government contribution (up to $260.72/year, 25 cents per dollar you contribute, from 1 July 2025, provided your taxable income is under $180,000) if you contribute at least $1,042.86 between 1 July and 30 June
• Claim KiwiSaver contributions as a deduction (they are not deductible for self-employed people — contributions come from after-tax income)

Even at the minimum contribution to qualify for the full government contribution, you get a 25% return on $1,042.86 — effectively guaranteed. It is almost always worth doing.

How Much Tax Should I Set Aside?

A common mistake among new self-employed workers is spending all their income and facing a large unexpected tax bill. IRD gives no flat percentage to set aside: income tax is worked out on your profit after allowable expenses at the rates in the table above, and ACC levies are charged separately. Keeping tax money in a separate savings account makes it easier to have the cash ready when the bill arrives.

Frequently Asked Questions

Do I need an IRD number to work self-employed in NZ?

Yes. You need an IRD number before you start earning. Apply at ird.govt.nz or through a post office. New to NZ? You can apply with a NZ passport, birth certificate, or other acceptable identity documents.

Can I operate as a sole trader without registering a company?

Yes. As a sole trader, you trade in your own name with no registration required (other than a business name registration if you trade under a name that is not your own). A company gives you limited liability protection but adds compliance costs. For most people starting out, a sole trader structure is simpler.

What records do I need to keep?

Keep all income records (invoices, receipts, bank statements) and expense records for at least 7 years. IRD can audit up to 7 years back in standard cases (longer for fraud). Accounting software such as Xero, MYOB, or Wave makes recordkeeping far easier.

Is it worth using a tax agent as a sole trader?

For straightforward situations, many sole traders file their own IR3. A tax agent is worth considering if you have significant business expenses to optimise, rental property, or overseas income. The extended filing deadline (31 March the following year) is also valuable — you get an extra 8 months to file and pay. Tax agent fees are themselves deductible as a business expense.

Can I claim a home office as a self-employed person?

Yes. If you use part of your home exclusively or predominantly for business, you can claim a proportion of rent, mortgage interest, rates, insurance, and power. The proportion is calculated as the floor area used for business divided by total floor area. Keep a record of the space used and costs incurred.

Related Guides

• Provisional Tax Explained
• Business Expenses You Can Claim
• Contractor vs Employee: Tax Differences
• Sole Trader Tax Return Guide
• GST for Small Businesses NZ
• Self-Employed Tax Home
• Taxes Home