Equal Pay Act 1972 Guide

The Equal Pay Act is the law in New Zealand that aims to ensure people doing the same or similar work are paid equally, regardless of gender. It also links into the idea of pay equity, where jobs historically dominated by women may be undervalued and need re-assessment.

For NZ businesses, understanding the equal pay rules helps avoid legal risk, supports fairness, and builds a stronger workplace culture. Because public debate and law changes are active now (in 2025), employers must be alert to their obligations and new rules.

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In this guide you’ll learn:

• What the Equal Pay Act is and how it works in NZ
• What pay equity is and how it differs from equal pay
• What recent changes (2025) mean for employers and employees

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What Is The Equal Pay Act 1972?

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The Equal Pay Act 1972 is the law that makes it illegal for employers to pay women less than men for the same (or substantially similar) work.

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Under the Act:

• “Same or substantially similar work” is work requiring similar skill, effort, responsibility, and conditions.
• If there is a difference in pay for the same work, the employer must justify it on non-gender grounds (e.g. experience, market, qualifications).
• The Act is administered by MBIE (Ministry of Business, Innovation & Employment).

So basically: if two employees do the same job (or very similar jobs), they should receive the same pay and employment conditions, unless there is a valid, lawful reason not to.

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What Is Pay Equity & How Does It Relate?

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Pay equity is the principle that work predominantly done by women should not be undervalued compared to male-dominated work, simply because of gender bias. It is distinct from equal pay (which looks at the same work).

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A pay equity claim is when an employee or union argues that their work (or class of work) has been systemically undervalued. Under earlier law (2020 changes), parties could negotiate settlements.

In effect:

• Equal pay = same job, same pay
• Pay equity = different jobs, but of equal value, especially when one job is undervalued because it’s in a female-dominated sector

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What Changes To Equal Pay Act Were Introduced In 2025

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The Equal Pay Amendment Act 2025 made several major updates to how pay equity claims are raised and assessed in New Zealand.

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Below is a summary of the main changes and what they mean for employers:

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Existing claims discontinued

• What it means: All unresolved pay equity claims under the old law have been discontinued.
• Impact on employers: Employers no longer need to respond to previous unsettled claims.

New "merit" threshold

• What it means: Claims must now meet a stronger merit test, replacing the old arguable standard.
• Impact on employers: Fewer weak claims are likely to proceed, but stronger evidence will be needed for valid claims.

Stricter female-dominated test

• What it means: The workforce must now be at least 70% female for the last 10 years to qualify.
• Impact on employers: Narrower eligibility may exclude some sectors.

Comparator rules tightened

• What it means: Comparisons must first be made within the same employer before using external comparators.
• Impact on employers: Employers have more control over internal comparisons.

Back pay removed

• What it means: The Employment Relations Authority can no longer order back pay.
• Impact on employers: Reduces unexpected retrospective costs.

Review clauses invalidated

• What it means: Agreements with built-in review or revaluation clauses are no longer enforceable.
• Impact on employers: Employers won't face automatic re-evaluations.

Re-raising limits introduced

• What it means: Claims can't generally be reopened for 10 years after settlement.
• Impact on employers: Provides greater certainty and stability in pay agreements.

Phased implementation

• What it means: Pay increases ordered by the Authority must be phased over three years.
• Impact on employers: Employers can plan financially for gradual changes.

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Key Takeaways For Employers And Employees

• Equal pay and pay equity remain key legal requirements for all NZ workplaces.
• The Equal Pay Amendment Act 2025 tightened how claims can be raised and assessed.
• Employers must ensure pay structures are fair, documented, and transparent.
• Employees have the right to challenge unfair pay and can seek help through MBIE or the Employment Relations Authority.
• Regular pay audits, clear job descriptions, and consistent communication help avoid compliance issues.
• Promoting fairness in pay supports stronger culture, retention, and trust within the workplace.

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