What Is a Counterclaim and When Is It Used?

November 5, 2026    Civillawyers
What Is a Counterclaim and When Is It Used?

A civil dispute can involve competing claims rather than a single allegation and response. While a defendant may need to answer the claimant’s case, the defendant may also have a legal claim arising from the same types of contract disputes. A counterclaim provides a way to bring that claim before the court as part of the existing proceedings, where permitted. Its use can affect the issues, evidence and remedies considered by the court.

This blog examines what a counterclaim means, when it may be appropriate and how the process applies to civil proceedings in Western Australia.

What Is a Counterclaim?

A counterclaim is a claim made by a defendant against the claimant within proceedings. It may seek money, another remedy or a set-off, depending on the circumstances. The Magistrates Court of Western Australia describes a counterclaim as a claim made by a defendant against a claimant arising from the same circumstances. It gives the defendant an active claim in the case.

For example, a company could be suing its contractor due to the faulty types of construction disputes. The contractor might counterclaim for money owed because of the same construction project. In such a case, the court will hear the two sides’ cases.

When Is a Counterclaim Used?

A counterclaim is generally considered when the defendant believes the claimant owes them something connected with the dispute. It may help resolve related issues.

Common circumstances include:

  • Contract Disputes: A defendant may claim payment or damages arising from the same contract.
  • Property or Damage Disputes: A defendant may allege that the claimant caused related loss.
  • Set-Off Claims: A defendant may seek to reduce or extinguish the amount claimed.
  • Related Obligations: A defendant may allege breach of an obligation forming part of the same transaction.

The counterclaim must have a proper legal basis. The court must have jurisdiction. A defendant should assess the connection carefully before filing.

How Is a Counterclaim Made in Western Australia?

In a General Procedure Claim in the Magistrates Court, a defendant intending to counterclaim generally lodges and serves a statement of defence and counterclaim in the approved form. Minor Cases use different forms, including a specific counterclaim form. For General Procedure Claims, the rules generally require a defence and counterclaim within 14 days after service of the statement of claim, unless another period is ordered.

The defendant needs to provide the reason behind the counterclaim as well as show how the action of the claimant has affected them. Once filed, the counterclaim becomes part of the proceedings. It requires the claimant to respond to the allegations within the applicable timeframe.

How Does the Claimant Respond?

Once served, the original claimant must defend the counterclaim. The claimant’s original case continues within the same proceeding. In the Magistrates Court, a claimant served with a statement of defence and counterclaim must generally lodge and serve a defence to the counterclaim within 14 days. The claimant may also need to respond to the defence.

This is why a timely review is essential. The claimant must highlight the allegations that are disputed and then consider the evidence in support of each position. Hiring a Civil Litigation Lawyers Perth is a feasible option for substantial or complex counterclaims.

What Are the Jurisdictional Limits?

A counterclaim cannot bypass the court’s jurisdiction. The Magistrates Court (Civil Proceedings) Act 2004 addresses counterclaims involving matters outside the Court’s civil jurisdiction. For certain monetary counterclaims, the Court may deal with the claim unless the opposing party objects before the relevant trial date. Non-monetary counterclaims can involve different limitations where the requested remedy exceeds jurisdiction.

What Should You Consider Before Filing?

The counterclaim can impact litigation expenses and extent. You should take into account these practical considerations before filing a counterclaim to a civil lawsuit:

  • Legal basis: Determine the nature of the cause of action and the remedy.
  • Evidence: Consider the documents, contracts, correspondence, and evidence of witnesses.
  • Jurisdiction: Confirm that the court has jurisdiction to determine the case and grant relief.
  • Time limit: Consider the time limit within which the claim must be filed.
  • Costs: Consider the filing costs and the adverse cost risks.
  • Purpose: Determine whether the filing of the counterclaim will serve its purpose in the settlement of the matter.

Final Thoughts

A counterclaim allows a defendant in Western Australia to pursue a claim against the claimant within existing civil proceedings. This may cover any issues arising out of the contract, finances, property, or any other matter that may be included within the context of set-off claims.

However, there is a specific procedure for this that needs to be followed as per the processes of the particular court that are applicable to the case. If you are considering a counterclaim in Perth, review the applicable court rules and seek assistance from a Building and Construction Lawyers Perth before filing. Careful preparation can help ensure the claim is properly framed and procedurally compliant.

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