In contrast to many other common law jurisdictions, Aotearoa New Zealand does not have formal class action rules or legislation. However, class action-style proceedings have nevertheless increased in prominence in the last decade. In the absence of a class action regime, group litigation is conducted as a representative proceeding under Rule 4.24 of the High Court Rules. Rule 4.24 allows a person or persons to bring a claim on behalf of a group of people sharing the same interest in the subject matter of the proceeding.

The details of the procedure to be applied to such a representative proceeding are not set out in Rule 4.24. However, a reasonably well-developed set of principles for the management and conduct of class action-style proceedings has been developed in recent case law under the existing procedural rules and the inherent jurisdiction of the High Court, as outlined further in 2.1 Collective Redress and Class Action Legislation.

Consideration of a Legislative Regime

The possibility of legislative reform has been considered at various points.

Between 2006 and 2008, the Rules Committee (a statutory body responsible for the procedural rules of the New Zealand courts) considered and investigated the possible introduction of legislation to introduce a class action regime. In late 2008, a draft Class Action Bill and draft High Court Amendment (Class Action Rules) were submitted to the Ministry of Justice for consideration, but were not acted upon.

Again in 2018, the Rules Committee released new draft procedural rules for consultation; however, the most realistic pathway to reform in this area is now through the work of Te Aka Matua o te Ture, the New Zealand Law Commission (the "Law Commission"). Initially announced in 2017, the Law Commission began a comprehensive review of class actions and litigation in Aotearoa New Zealand in 2019. Its terms of reference were to consider:

(i) whether and to what extent the law should allow class actions; and

(ii) whether and to what extent the law should allow litigation funding, having regard to the torts of maintenance and champerty.

The Law Commission submitted its final report to Te Tāhū o te Ture, the Ministry of Justice, on 27 June 2022. As signalled in earlier consultation papers, the Law Commission has recommended the establishment of a statutory class actions regime, including a new Class Actions Act. The proposed legislative regime is outlined further in 4.2 Legislative Reform.

New Zealand does not have a formal class action regime as exists in other jurisdictions. Proceedings that would be advanced as class actions in other jurisdictions may be pursued as representative proceedings in Aotearoa New Zealand.

Such proceedings are brought pursuant to Rule 4.24 of the High Court Rules, which permits a person or persons to bring a claim on behalf of other people who share the same interest in the subject matter of the proceeding. 

An equivalent to Rule 4.24 has existed in Aotearoa New Zealand since the late 1800s, based on an English model. However, class action-style proceedings have been slow to emerge in New Zealand compared to several overseas jurisdictions. The Law Commission noted in its December 2020 Issues Paper that only 44 cases have proceeded under Rule 4.24, with the majority of these being filed after 2000.

As the principles for managing and conducting class action-style proceedings in Aotearoa New Zealand have been developed through case law under the existing procedural rules and the Court's inherent jurisdiction, they are not modelled to a material degree on any other country's regime.

There is no relevant information in this jurisdiction.

Currently, class action-style proceedings are conducted in Aotearoa New Zealand as representative proceedings under Rule 4.24 of the High Court Rules. In contrast to many other jurisdictions, there is no formal class action regime or rules.

While Rule 4.24 was not originally drafted to facilitate class actions, the New Zealand Supreme Court has endorsed its use in that manner. In the Feltex shareholder proceeding (Credit Suisse Private Equity LLC v Houghton [2014] NZSC 37), the Court expressed the view that flexibility in how the Rule is applied accords with the modern approach to representative proceedings and that it is legitimate for the scope of the Rules to continue to adapt to ensure that the overall object of the High Court Rules is achieved.

While the principles for managing and conducting class action-style proceedings have been developed and continue to evolve in case law, there is a prospect of legislative reform in this area. The Law Commission has conducted a first-principles review of class actions and litigation funding in Aotearoa New Zealand, recommending the creation of a statutory class action regime. As stated in 1.1 History and Policy Drivers of the Legislative Regime, the Law Commission submitted its final report to the Ministry of Justice on 27 June 2022.

Representative proceedings are available in any civil matter where the same interest requirement under Rule 4.24 of the High Court Rules is fulfilled.

Class action-style proceedings are, strictly speaking, called representative actions in Aotearoa New Zealand, as they are conducted as representative proceedings under Rule 4.24 of the High Court Rules. Rule 4.24 on persons having the same interest states:

“One or more persons may sue or be sued on behalf of, or for the benefit of, all persons with the same interest in the subject matter of a proceeding –

• (a)       with the consent of the other persons who have the same interest; or
• (b)       as directed by the court on an application made by a party or intending party to the proceeding.

The threshold concerning the ‘same interest’ requirement is relatively low. In practice, the representative plaintiff(s) is required only to establish that:

• the representative group is capable of clear definition;
• there are issues of fact or law common to all members; and
• the representative plaintiff(s) fairly and adequately represents the group.”

Additionally, the representative order cannot confer a right of action on class members who would not have such a right in separate proceedings, nor can it bar a defence that might have been available to the defendant in a separate proceeding.

If the above requirements are met, the court will consider whether to exercise its discretion to make a representative order (Body Corporate Number DPS 91535 v 3A Composites GmbH [2023] NZCA 648). A court will not exercise its discretion to make a representative order if the proposed representative proceedings would not advance the objective of the High Court Rules to secure the just, speedy and inexpensive determination of the proceedings.

The primary mechanism by which class action-style proceedings are brought in Aotearoa New Zealand is by way of a representative proceeding under Rule 4.24 of the High Court Rules.

The High Court of New Zealand is the principal institution in which such proceedings are brought. A judgment of the High Court is conclusive unless overruled on appeal, first to the Court of Appeal and then to the Supreme Court.

It is possible to bring representative actions in the Employment Court regarding employment law matters. According to Employment Court Regulation 6, since there is no specific procedure for handling such actions in the Employment Court, these cases will be managed as often as practicable in accordance with the High Court Rules.

Statutory Mechanisms

Outside of Rule 4.24 of the High Court Rules, certain regulatory bodies in New Zealand have the power to bring collective proceedings. These mechanisms are statutory and include the following.

• The Commerce Commission can bring proceedings on behalf of affected consumers under various statutes, including the Fair Trading Act 1986 and the Credit Contracts and Consumer Finance Act 2003.
• The Financial Markets Authority (FMA) can, by High Court order, bring a representative proceeding on behalf of a class of persons for breach of the Financial Markets Conduct Act 2013 where the High Court considers that the claim is in the public interest.
• The Human Rights Commission can initiate civil proceedings before the Human Rights Review Tribunal on behalf of a class of persons affected by a discriminatory practice that breaches the Human Rights Act 1993.

Class action-style proceedings are brought in New Zealand as representative proceedings, where a named plaintiff or plaintiffs bring a claim on behalf of themselves and those with the same interest in the subject matter of the proceeding, often referred to as the group or class.

Under Rule 4.24 of the High Court rules, a representative proceeding can proceed either:

• with the consent of those represented; or
• as directed by the court on an application made by a party or intending party to the proceeding.

Where the representative plaintiff has the consent of all persons it intends to represent, it may file a representative claim as of right. Without consent, a representative plaintiff requires a court direction and must apply to the court for a representative order. However, even where consent is obtained, the courts have indicated that it is prudent for representative plaintiffs to apply for directions to confirm that they may act accordingly (J Flowers Ltd v Burns [1987] 1 NZLR 260 at 264).

Given that class action proceedings typically involve a large number of potential group members, obtaining consent generally is not feasible. It is therefore commonplace for representative plaintiffs to apply to the court for a representative order under Rule 4.24(b), often at the same time as the proceeding is filed.

Any plaintiff who satisfies the same interest requirement in Rule 4.24 of the High Court Rules can bring a representative action. See 3.2 Definition of Collective Redress/Class Actions as to the threshold adopted by the New Zealand courts in assessing the same interest requirement under Rule 4.24 of the High Court Rules.

See also 3.1 Mechanisms for Bringing Collective Redress/Class Actions as to the statutory mechanisms to allow certain regulatory bodies to bring collective proceedings on behalf of a group of claimants.

A representative order made under Rule 4.24 of the High Court Rules makes provision for how and when plaintiffs can become members of a representative group and therefore be part of a class action proceeding. Such an order can be sought on either an opt-in or opt-out basis.

If the order provides for membership to be determined on an opt-out basis, all persons within the definition of the class are members of it unless they formally elect not to be. Conversely, if membership is determined on an opt-in basis, then individuals who are within the definition of the class will not be considered members for the purpose of the action unless they actively choose to opt in.

Until Court of Appeal and Supreme Court decisions in Ross v Southern Response Earthquake Services Limited ([2017] NZCA 489; [2020] NZSC 126), class actions in New Zealand had typically proceeded on an opt-in basis. However, these decisions have confirmed that opt-out proceedings are available under Rule 4.24 and should be made in appropriate cases.

The Supreme Court held that the starting point is for the court to adopt the procedure sought by the applicant (opt-in or opt-out), unless there is a good reason to do otherwise. However, the court must consider the relevant considerations in light of what will best meet the objectives of the representative action in the particular case. Relevant considerations include:

• impact on class members – if there is a real prospect that some class members may end up worse off, this may favour an opt-in approach; and
• class size – an opt-in approach may be more appropriate where the class is small, although this is not determinative.

The Supreme Court also recognised that proceedings that begin as opt-out (eg, allowing common issues to be determined at “stage one”) may need to become opt-in at “stage two” to avoid prejudice or unfairness (eg, to resolve the remaining individual issues arising on individual class members' claims).

An “opt-out order” will be given on conditions that include:

• requirements for notice to be given to class members with an explanation of the right to opt out; and
• a requirement for court approval of a settlement or discontinuance.

Notification of potential class members is supervised by the court as a matter of case management on a case-by-case basis. Generally, advertising will be permitted if necessary. The court’s supervision of communications with potential class members will vary in accordance with the circumstances of the case, but will be engaged where communications to the potential class are misleading or potentially confusing.

Further plaintiffs can be added to a representative action, provided that their joinder complies with any representative order made by the court and the timing and terms as set by the court therein.

As an aspect of case management, the court can set a date by which plaintiffs are required to opt in to, or out of, the proceeding. This date can be set at the same time as the representative order is made or at a later stage in the proceeding.

Given the absence of rules governing class actions in Aotearoa New Zealand, representative proceedings are managed in the same manner as ordinary cases, under the existing procedural rules and the court's inherent jurisdiction.

Most complex proceedings in the High Court will have an assigned High Court judge for case management and, where possible, that same judge will continue to manage the proceedings through to determination. Representative proceedings are typically subject to close ongoing case management, and the Court retains the ability to vary or rescind the representative order where continuation of the proceeding in that form is no longer appropriate.

Notwithstanding the absence of a formal class action regime, a reasonably well-developed set of principles for the management and conduct of representative proceedings has emerged in recent case law, with courts affirming a flexible and pragmatic approach and the potential for continued development in appropriate cases.

Given the nature and number of issues that often arise in class actions, the trial of the proceeding is often dealt with in stages, known as bifurcated or split trials. In particular, a split trial may be appropriate where the proceeding gives rise to both issues common to all group members (eg, liability) and issues that differ for each class member (eg, reliance and loss).

The time taken for a representative proceeding to progress to trial varies from case to case. However, given the lack of a formal set of procedural rules, representative proceedings often involve complex procedural issues and resulting interlocutory applications (that may generate multiple appeals), and may take several years to reach trial.

As there is no formal set of class action rules in Aotearoa New Zealand, representative proceedings are subject to management under the existing procedural rules and the court's inherent jurisdiction. Given this, all the usual procedural mechanisms for the management of the proceedings are available and could be exercised if appropriate in the context of the particular proceeding. These will include trials of preliminary issues, split trials and summary judgment or dismissal.

Costs in Class Action Proceedings

There are no special cost rules applying to class action-style proceedings in Aotearoa New Zealand. The usual civil procedure rules apply, including the requirement that an unsuccessful party will usually be liable for the costs of the successful party. Costs are set by reference to a prescribed scale, which applies notional daily rates and time allocations for particular steps in the proceeding, depending on its complexity and the skill and experience required of counsel. An award of scale costs is not intended to fully compensate the successful party, and, particularly in complex representative proceedings, costs recovered may reflect only a small proportion of the actual costs incurred in the proceeding.

The court may increase costs from the standard scale amount where the conduct of a party or the nature of the proceeding justifies it. Indemnity costs may also be awarded, which compensate for costs actually incurred, but are only available in limited circumstances. 

In a representative proceeding, it is the representative plaintiff or plaintiffs who will be liable for the defendant's costs if the claim is unsuccessful, as the wider group members are technically not considered parties to the proceeding. As a result, representative plaintiffs may seek indemnification from members of the class or, more commonly, will seek third-party litigation funding and an indemnification from the funder in respect of adverse costs. As New Zealand's costs regime allows third-party costs awards in certain circumstances, litigation funders have also occasionally been found liable for a successful defendant's costs.

Due to the potentially significant costs associated with awards in representative proceedings, defendants frequently seek security for costs, which courts almost always grant.

Third-Party Litigation Funding

The use of litigation funding is growing in Aotearoa New Zealand. As with the representative action procedure more generally, there are currently no formal rules governing funding arrangements; however, the principles to be applied have been developed in the recent case law.

The courts have cautiously permitted litigation funding where it is seen as promoting access to justice for plaintiffs, however that permission comes with active judicial scrutiny to ensure that the objectives of justice are met (Ross v Southern Response Earthquake Services Limited [2019] NZCA 431 at [104] to [105]; Saunders v Houghton (No 1) [2010] 3 NZLR 331 at [24]). 

If a representative proceeding is financed by a third-party litigation funder, the following information should be disclosed to both the other parties to the proceeding and the court at the time the proceeding is filed:

• the existence of the funder;
• their identity and location; and, if relevant for applications regarding security for costs,
• whether they are subject to the jurisdiction of the New Zealand courts.

There is no general requirement that the funding agreement itself be disclosed, although disclosure may be required (subject to any necessary redactions in respect of confidential, litigation-sensitive or privileged material), where that is necessary to determine an application before the court. Proactive disclosure of (redacted) funding agreements is an emerging practice in funded class actions in New Zealand.

Common Fund Orders

The New Zealand Court of Appeal recently held that New Zealand courts have jurisdiction to make common fund orders (CFOs) in representative proceedings (Simons v ANZ Bank New Zealand Ltd [2024] NZCA 330). A CFO allows a funder to take a share of each class member’s recovery regardless of whether the class member signed up to the funding agreement.

The Court of Appeal held that the High Court Rules confer jurisdiction to make CFOs, and that this jurisdiction is consistent with a key objective of Rule 4.24, which is to enhance access to justice.

The rules regarding disclosure in representative proceedings are the same as those in any other civil proceeding in Aotearoa New Zealand, with disclosure occurring at a number of stages throughout the litigation process. The most significant obligation is the requirement on the parties to disclose relevant documents in their control in accordance with any disclosure order made by the court.

The court can order standard disclosure of all documents that may advance or damage a party's case, tailored disclosure based on the particular circumstances of the case, or dispense with discovery altogether. In representative proceedings, discovery is typically subject to close case management by the court.

In addition to discovery orders against the parties, the court may order non-parties to give discovery. In representative proceedings, members of the represented group who are not representative plaintiffs may be required to provide discovery if the court orders it as a matter of case management.

Parties are not required to provide disclosure of documents that are subject to privilege, including legal advice and litigation privilege.

All relevant civil remedies are available in Aotearoa New Zealand, including injunctive, declaratory, equitable and monetary relief.

In the absence of a set of rules governing representative proceedings, the usual range of alternative dispute resolution (ADR) mechanisms is open to the parties. These include mediation and arbitration. Lawyers are required by the relevant professional rules to keep clients advised of alternatives to litigation that are reasonably available, but whether to engage in ADR is a matter for the parties and there is no requirement for them to do so.

Mediation is commonly used in the context of settlement negotiations in commercial disputes in Aotearoa New Zealand.

New Zealand’s Arbitration Act 1996 notably limits the enforceability of arbitration clauses in contracts with consumers. This means that a defendant in a class action brought by consumers may not be able to force the action to proceed by arbitration, even if there is an arbitration clause in their standard form contracts. For an arbitration clause to be enforceable in such circumstances, each consumer must agree (again) to arbitrate after the dispute arises.

Judgments and Appeals

The High Court of New Zealand is the principal institution in which representative proceedings are brought. A judgment of the High Court is conclusive unless overruled on appeal. 

In most circumstances, there is a right of appeal to the Court of Appeal. Leave to appeal may be required in some circumstances. Appeals to the Court of Appeal are by way of rehearing, which in practice means that it will be conducted on the record of the evidence given in the High Court (subject to the Court’s power to admit further evidence in limited circumstances). Court of Appeal decisions can be appealed to Aotearoa New Zealand’s highest court, the Supreme Court, only with the leave of the Supreme Court. Leave is only granted where the appeal involves a matter of general public importance or general commercial significance, or if a substantial miscarriage of justice may occur if the appeal is not heard. 

Judgments will be binding on all parties to the proceeding, as determined by the relevant representative order made by the court at the outset of the proceeding. Representative proceedings may determine all issues for all members of the represented group or be structured to be binding only with respect to the common issues.

Enforcement

There is no particular mechanism for the enforcement of judgments in representative proceedings. The relevant mechanisms are therefore those provided in the usual procedural rules, which include attachment, charging, sale and possession orders.

The Law Commission has conducted a first principles review of class actions and litigation funding in Aotearoa New Zealand. Its terms of reference were to consider:

• whether and to what extent the law should allow class actions; and
• whether and to what extent the law should allow litigation funding, having regard to the torts of maintenance and champerty.

The Commission has concluded its review and recommended the creation of a statutory class actions regime, as well as the explicit permitting of litigation funding, subject to appropriate regulation.

As already stated in 1.1 History and Policy Drivers of the Legislative Regime and 2.1 Collective Redress and Class Action Legislation, the Law Commission submitted its final report to the Ministry of Justice on 27 June 2022.

In its final report to the Ministry of Justice (see 4.1 Policy Development), the Law Commission has recommended the creation of a statutory class actions regime, with a new Class Actions Act as the principal source of law in relation to class actions in Aotearoa New Zealand. The Law Commission also recommended that litigation funding should be expressly permitted, subject to appropriate regulation.

Key features of the recommended new statutory regime include:

• statutory objectives to improve access to justice and efficiently manage multiple claims;
• a new commencement procedure, including a certification stage – this will require court approval of class action proceedings and the consideration of a number of key issues, including class definition, the strength of the cause of action and the nature of the class action (opt-in or opt-out); 
• provision for both opt-in and opt-out class actions, with no presumption in favour of either approach; 
• a mechanism to deal with concurrent or competing class actions; 
• the possibility of “aggregate damages”, where the court is empowered to award such damages rather than requiring class members individually to prove their loss or damage;
• court supervision and approval of class action discontinuances and settlements; and
• court oversight and approval of litigation funding agreements, with the court empowered to make cost-sharing orders, enabling legal fees and funding costs to be distributed equitably between all class members.

The Law Commission also recommended that, in the interest of enhancing access to justice, the government should consider the establishment of a public action fund to provide funding for class actions that are unlikely to attract litigation funding. This could be funded initially by the government and then potentially by levies on future class action settlements.

The Aotearoa New Zealand government will now consider the Law Commission’s recommendations and decide whether to reform the law.

The key trend in the New Zealand class action landscape is the continued willingness of the courts to adopt a flexible and facilitative approach in support of access to justice.  This is particularly reflected in rulings from the Supreme Court in 2020 favour of opt out actions and the Court of Appeal in 2024 in favour of common fund orders.

In common with developments overseas, there has been a continued rise in ESG litigation generally, although there have been no ESG specific class actions filed. There may be more class actions in this area in future, including as a result of the Financial Sector (Climate-related Disclosures and Other Matters) Amendment Act 2021, which made climate-related disclosures mandatory for some large New Zealand financial market participants.