Sole Trader Tax Calculator

As a sole trader in New Zealand, your business income is treated as your personal income and taxed at the same progressive rates as for employees: 10.5% on the first $14,000; 17.5% on $14,001 to $48,000; 30% on $48,001 to $70,000; 33% on $70,001 to $180,000; and 39% on income above $180,000. Unlike employees, no PAYE is deducted from your income during the year. Instead, once your residual income tax (RIT) exceeds $5,000, you must pay provisional tax — three instalments spread through the year (typically August, January, and May). You file an IR3 individual income tax return at the end of each tax year, declaring all business income and deductible expenses. If your expenses are accurately tracked, you only pay tax on your net profit (income minus allowable deductions), not your gross revenue. Source: IRD — Sole Traders (ird.govt.nz).

Sole traders in New Zealand can deduct any expense that is incurred wholly or partly for earning taxable income. Fully deductible expenses include: accountant and legal fees, business insurance, advertising and marketing, bank charges on business accounts, work-related subscriptions, and business-only equipment purchases. For mixed-use expenses, only the business proportion is deductible: home office costs (percentage of rent/mortgage, power, and internet based on workspace proportion); vehicle expenses (log book required to establish business-use percentage); and mobile phone (portion used for business). Capital purchases (equipment over $1,000) must generally be depreciated over time rather than expensed upfront, though the low-value asset threshold of $1,000 allows immediate write-off for items under that value. Meals and entertainment are only 50% deductible. Keep all receipts and records for 7 years. Source: IRD — Business Expenses (ird.govt.nz).

Yes, sole traders in New Zealand are required to pay ACC (Accident Compensation Corporation) levies. All self-employed people automatically pay the ACC Earners' Levy (currently approximately $1.75 per $100 of liable earnings), which is collected through your end-of-year income tax return and covers you for personal injuries outside of work. In addition, self-employed people pay the ACC Work Levy, which is based on your industry classification code (risk-rated by industry) and your declared self-employment income. The Work Levy rates vary significantly by industry — from less than $1 per $100 for low-risk office work to over $10 per $100 for high-risk industries such as forestry or fishing. Self-employed ACC cover (CoverPlus) is standard, but you can elect CoverPlus Extra to negotiate a fixed agreed weekly compensation amount rather than receiving compensation based on prior earnings. Source: ACC (acc.co.nz).

Sole traders in New Zealand must pay provisional tax once their residual income tax (RIT) — the income tax owing at the end of the year after deducting tax already paid — exceeds $5,000 in a year. If your RIT is $5,000 or less, you pay a single end-of-year tax bill (terminal tax) instead. For those who must pay provisional tax, it is spread across three instalments aligned with the NZ tax year: the first instalment is due 28 August, the second 15 January, and the third 7 May. Each instalment is typically calculated as one-third of 105% of the prior year's RIT (the standard uplift method), though other methods are available including estimating your current year's income. Underpayment of provisional tax attracts use-of-money interest from IRD. Keeping up with provisional tax helps avoid a large end-of-year tax bill. Source: IRD — Provisional Tax (ird.govt.nz/provisional-tax).