Australia vs New Zealand Tax Comparison for the Self-Employed

Income tax brackets

Australia provides a tax-free threshold of $18,200 and uses a four-bracket structure ranging from 16% to 45% (2025-26), plus a flat 2% Medicare levy. New Zealand taxes from dollar one at 10.5% and uses a five-bracket structure topping out at 39% on income above NZD $180,000 (from April 2025). Australia's tax-free threshold provides a meaningful advantage at lower incomes, but New Zealand's lower top rate (39% vs 45%) benefits high earners. The 37% Australian bracket between $135,001 and $190,000 has no NZ equivalent, where the 33% rate applies from NZD $78,101 to NZD $180,000.

GST: 10% vs 15%

Australia charges GST at 10% with a registration threshold of AUD $75,000. New Zealand charges GST at 15% with a registration threshold of NZD $60,000. Both systems operate as invoice-credit VAT models. New Zealand's higher GST rate adds a larger consumption tax burden on business expenses and consumer prices, though both systems allow full input tax credits for GST on business purchases. The simpler, single-rate structure is common to both countries (unlike the UK's multiple VAT rates).

Company tax and dividends

Australia offers a 25% rate for base rate entities and 30% for other companies, with full dividend imputation through the franking credit system. New Zealand applies a flat 28% company tax rate with its own imputation credit system. Both countries use imputation to prevent double taxation on distributed profits. Australia's lower 25% base rate entity threshold benefits active trading companies; New Zealand's flat 28% is simpler but slightly higher. The franking/imputation mechanics are conceptually identical, though Australia's dual rate creates more planning considerations for base rate entity eligibility.

Capital gains treatment

Australia applies a comprehensive CGT regime. Assets held longer than 12 months qualify for a 50% discount, with the remaining 50% taxed at marginal rates. Small business CGT concessions under Division 152 of the ITAA 1997 can reduce or eliminate gains entirely through the 15-year exemption, 50% active asset reduction, retirement exemption, and rollover. New Zealand has no broad-based CGT. Residential property gains are taxed under the bright-line test if sold within the prescribed period, and land transactions with a profit-making intention are taxable as income. For long-term business asset appreciation outside property, New Zealand is structurally lighter.

Superannuation vs KiwiSaver

Australian employers must contribute 12% of ordinary time earnings to super (2025-26). Self-employed Australians have no SG obligation to themselves but can make voluntary concessional contributions taxed at 15% inside the fund, providing strong rate arbitrage against marginal rates of 30% or above. New Zealand KiwiSaver requires a minimum 3% employer contribution (rising to 3.5% from April 2026), with employee contributions defaulting to 3% of gross pay. Self-employed New Zealanders face no mandatory KiwiSaver contribution; voluntary contributions attract a modest government contribution that is being reduced and capped. Australian super is a significantly more powerful tax shelter for the self-employed than NZ KiwiSaver.

ACC levies vs workers' compensation

New Zealand's ACC scheme provides universal, no-fault injury cover for all residents and workers. Self-employed pay an earners' levy of approximately 1.67% (including GST) plus a work levy calculated by industry code, with maximum liable earnings capped at approximately NZD $152,790 (2025-26). Coverage is 24/7, not limited to work-related injuries. Australian workers' compensation is state and territory-based, employer-funded, and covers work-related injuries only. Self-employed Australians can opt into their state scheme but have no mandatory earners' levy. ACC acts as an effective additional tax wedge for NZ self-employed but buys broader protection than the Australian system.

Business structures

Australia commonly uses sole traders, partnerships, Pty Ltd companies, and discretionary or unit trusts. Trusts are widely used for income splitting and CGT concession access. New Zealand uses sole traders, partnerships, companies, Look-Through Companies (LTCs), and limited partnerships. LTCs and limited partnerships provide explicit flow-through with limited liability, giving an option Australia achieves through trusts or partnerships. New Zealand's LTC framework offers a cleaner pass-through company structure; Australia's trust usage is more flexible for income streaming and CGT planning but carries greater administrative complexity.

Statute references

• Income Tax Assessment Act 1997 (Australian income tax rates, Division 152 CGT concessions)
• A New Tax System (Goods and Services Tax) Act 1999
• Superannuation Guarantee (Administration) Act 1992
• Income Tax Act 2007 (NZ)
• Goods and Services Tax Act 1985 (NZ)
• KiwiSaver Act 2006 (NZ)
• Accident Compensation Act 2001 (NZ)
• Trans-Tasman Retirement Savings Portability Agreement

Frequently asked questions