How to Pay Less Tax Legally in NZ: 12 Strategies for Business Owners

There is a difference between tax evasion (illegal) and tax minimisation (completely legal and sensible). Every dollar you overpay in tax is a dollar that could be reinvested in your business, paid to your team, or kept in your pocket.

Here are 12 strategies that New Zealand business owners use to reduce their tax bill — all of them legitimate, all of them IRD-compliant.

The structure you operate through has a significant impact on how much tax you pay.

• Sole trader: Income is taxed at your personal marginal rate — up to 39% on income over $180,000
• Company: Company tax rate is a flat 28%
• Look-through company (LTC): Income flows through to shareholders at personal rates, but losses can offset other income
• Trust: Can distribute income to beneficiaries at lower tax rates

If you are a sole trader earning over $70,000, it is worth modelling whether incorporating as a company would reduce your overall tax. The answer depends on how much you need to draw from the business — but for many business owners, the savings are material.

Tax is calculated on income earned in a given year. If you have flexibility over when you invoice or receive payment, timing can make a real difference.

• Defer income: If you are close to a higher tax bracket, consider delaying an invoice until the new tax year
• Bring forward expenses: Pay deductible expenses before 31 March to claim them in the current year
• Prepay expenses: You can prepay up to 12 months of certain expenses (insurance, subscriptions, rent) and claim the deduction now

This is not about avoiding tax permanently — it is about deferring it, which improves your cash flow.

Many business owners miss deductions they are entitled to. Common ones that get overlooked:

• Home office: If you work from home, you can claim a portion of mortgage interest or rent, rates, insurance, power, and internet
• Vehicle costs: Business use of your vehicle is deductible — either actual costs with a logbook, or the IRD mileage rate (currently $1.04/km for the first 14,000km)
• Professional development: Courses, conferences, and subscriptions relevant to your business
• Bank fees and interest: On business accounts and loans
• Accounting and legal fees: Fully deductible
• Tools and equipment: Either immediately or through depreciation

The key rule: the expense must be incurred in earning your income. Keep records.

When you buy assets for your business, you generally cannot deduct the full cost immediately — you depreciate it over the asset's useful life. But there are exceptions:

• Low-value asset threshold: Assets costing $1,000 or less (excluding GST) can be written off immediately
• Depreciation loading: New assets may qualify for an additional 20% depreciation loading in the first year
• Timing purchases: Buying an asset before 31 March means you get a full year's depreciation in the current tax year

If you are planning a significant equipment purchase, the timing relative to your balance date matters.

If you operate through a company, you can pay yourself a salary as a shareholder-employee. This is deductible to the company (reducing company tax) and taxed at your personal rate.

The optimal salary level depends on your personal tax rate versus the company rate. If your personal rate is lower than 28%, paying yourself more salary reduces the overall tax. If your personal rate is higher, retaining more in the company at 28% may be better.

This is one of the most impactful planning decisions for company owners — and it is worth modelling with your accountant each year.

If family members are genuinely involved in your business, paying them a market-rate salary for their work is legitimate and reduces your taxable income.

A family trust can also distribute income to beneficiaries (including adult children or a spouse) who are on lower tax rates. IRD scrutinises this area closely — distributions must be genuine and at arm's length — but when structured correctly, it is a well-established planning tool.

KiwiSaver contributions are not directly tax-deductible for individuals, but employer contributions to employee KiwiSaver are deductible to the business. If you are a shareholder-employee, structuring your remuneration to include employer KiwiSaver contributions can be tax-efficient.

For self-employed people, contributing to KiwiSaver also qualifies for the member tax credit — up to $521 per year from the government, effectively a 50% return on contributions up to $1,042.

Provisional tax is paid in instalments during the year based on an estimate of your income. If you overpay, IRD holds your money interest-free until your return is filed. If you underpay, you pay use-of-money interest (currently 10.39% per annum).

Options to manage this:

• Standard uplift method: Pay based on last year's residual income tax plus 5% — safe but may overpay
• Estimation method: Pay based on your own estimate of this year's income — more accurate but requires monitoring
• AIM (Accounting Income Method): Pay based on actual accounting profit each period — good for businesses with variable income

Getting provisional tax right means you are not giving IRD an interest-free loan or paying unnecessary interest.

If your business undertakes research and development, you may be eligible for a 15% tax credit on eligible R&D expenditure. This is a credit against your tax bill — not just a deduction — so it is particularly valuable.

Eligible activities include developing new products, processes, or software. The rules are specific and require pre-approval in some cases, but for qualifying businesses the savings can be significant.

If your business makes a loss in a year, that loss can generally be carried forward to offset future profits. But there are smarter ways to use losses:

• LTC losses: In a look-through company, losses flow through to shareholders and can offset other personal income in the same year
• Grouping losses: If you have multiple companies in a group, losses in one can offset profits in another
• Timing: If you expect a profitable year ahead, consider bringing forward deductible expenditure to create or increase a loss now

If you are GST-registered, your filing frequency affects your cash flow:

• Monthly: Better if you have large input tax credits (e.g. you buy a lot of stock or equipment)
• Two-monthly: The default for most businesses
• Six-monthly: Available if your turnover is under $500,000 — simpler but less frequent refunds

Also consider the payments basis vs invoice basis for GST. On the payments basis, you only account for GST when you actually receive or pay money — which can help cash flow if you have slow-paying customers.

The biggest tax saving most business owners can make is switching from reactive to proactive accounting. If you only talk to your accountant at year-end to file your return, you are missing most of the opportunity.

Tax planning is most effective when done before transactions happen — before you sell a property, before you buy an asset, before you restructure your business. After the fact, options are limited.

To be clear: these strategies are about arranging your affairs within the law to minimise tax. They are not about hiding income, claiming personal expenses as business expenses, or artificial arrangements with no commercial substance.

IRD has broad powers to challenge arrangements that lack commercial reality. The general anti-avoidance rule (GAAR) can apply to arrangements that technically comply with the law but are structured purely to avoid tax. Good tax planning stays well clear of that line.

If you are not sure whether you are paying more tax than you need to, the best starting point is a tax review with your accountant. We look at your current structure, your income profile, and your plans for the next few years — and identify where the opportunities are.

Get in touch with Eastmure & Associates to book a tax planning conversation. We work with business owners across Christchurch, Canterbury, and beyond.