Conditions and Strategic Importance of Filing a Counterclaim

1. Introduction: Transition from Passive to Active Defendant

In civil litigation, at first glance the plaintiff appears to be the "attacker" and the defendant merely the "defender." However, the institution of counterclaimthe defendant the opportunity to not only defend themselves but also to make an active legal claim . Thus, the defendant:

They can assert their own claim or right,
It can weaken or even completely eliminate the plaintiff's claims,
It can enable a two-pronged legal process within the same case .

Article 132 of the Code of Civil Procedure No. 6100 recognizes a counterclaim as an independent lawsuit conducted concurrently with the main lawsuit and regulates the circumstances under which it can be filed. Therefore, a counterclaim is an extremely important tool, both in terms of procedural law technique and litigation strategy

In this article:

The definition and legal nature of a counterclaim,
Conditions for filing a counterclaim under Article 132 of the Code of Civil Procedure ,
Requirements regarding duration, duties, authority, and form,
a counterclaim and a set-off/offset defenseis...
Application examples in areas such as divorce, commercial disputes, and construction contracts .
The strategic advantages and risks of a counterclaim,

This will be discussed in detail.

2. Legal Nature of the Counterclaim

2.1. What is a Counterclaim?

In simple and functional terms , a counterclaim is a new and independent lawsuit filed by a defendant in an ongoing lawsuit, in the same court, against the plaintiff in the original lawsuit .

The person who was the defendant in the main lawsuit becomes the plaintiff in the counterclaim
The plaintiff in the original lawsuit becomes the defendant in the counterclaim .

The court remains the same; a new court is not selected, and instead of a new case number, a "counterclaim" is often registered under the same main case number, or a linkage is made according to the court's internal practice.

2.2. The Difference Between a Counterclaim and the Main Claim

A counterclaim is not a claim that is absorbed into the main claim; it stands on its own:

A separate lawsuit petition,
a separate request,
A separate fee and expense,
a separate provision .

However, this is different from filing an independent lawsuit:

It is heard in the same court
The evidence often overlaps
The judge avoids contradictory decisions by considering both cases together .

In these respects, a counterclaim is both a procedural institutionand a serious bargaining and defense tool.

3. Basic Conditions for Filing a Counterclaim Under Article 132 of the Code of Civil Procedure

The system stipulated in Article 132 of the Code of Civil Procedure is based on roughly three main pillars:

The main case is still pending,
There must be a set-off or connection between the claim/right in question and the main lawsuit claim ,
Compliance with time and format requirements.

In addition to these conditions, legal interest is also required according to doctrine and case law; this prevents unnecessary counterclaims from being filed.

3.1. The Main Case Being Pending

The logic behind a counterclaim in response to . Therefore:

The main lawsuit should have been filed,
The court must not have made a final decision yet
The case pending .

If a petition titled "counterclaim" is filed before the main lawsuit is initiated, its content is essentially an independent lawsuit . Similarly, if the main lawsuit has been dismissed or concluded on its merits, any subsequent lawsuit will no longer be a counterclaim but again an independent lawsuit.

3.2. Exchange/Settlement Relationship or Connection

Article 132 of the Code of Civil Procedure stipulates that the filing of a counterclaim is conditional upon a relationship or connection . According to the law, the claim put forward in a counterclaim is:

It must be of a nature that allows for offsetting or deduction against the plaintiff's claim ,
Or related .

3.2.1. Exchange/Offset Relationship

Set-off in debt law occurs when two reciprocal claims cancel each other out. Claims:

It should be reciprocal
It should be of the same nature (like receiving money),
It must have become due and payable.

A claim that meets these conditions can be asserted as a set-off defense, or it can be the subject of a counterclaim . If a counterclaim is filed:

The defendant not only reduced the plaintiff's claim,
He also gains the possibility of being sued in terms of his own receivables

However, if the defendant's claim is significantly lower than the plaintiff's claim, filing a counterclaim solely for offsetting purposes often unnecessary expense and contrary to procedural efficiency . In such cases, the issue of legal interest arises.

3.2.2. Connection Requirement

In the Turkish Code of Civil Procedure, a connection exists if the judgment to be given in one case directly affects , or if the disputes are based on the same fundamental facts and legal relationship.

For example:

In the construction contract between the contractor and the client ,
- In response to the employer's "compensation for defective performance" lawsuit,
- The contractor filed a counterclaim for "payment of work,"

It strongly satisfies the connection requirement. Since both claims stem from the same contract, having them considered together in a single file facilitates proof and prevents conflicting decisions.

3.3. Legal Interest Requirement

As with any lawsuit, a counterclaim must also a legal interest . Considering litigation costs and court workload:

One point that could be raised as a defense is,
Making it the subject of a counterclaim again,

It will often not serve a legal purpose. For example:

If the plaintiff is claiming 100,000 TL but the defendant is only owed 10,000 TL,
Instead of filing a counterclaim for this 10,000 TL, a defense of set-off might suffice.

However, if the defendant's claim is higher than the plaintiff's claim, or if it needs to be determined by a separate judgment, the legal interest requirement is deemed to have been met.

4. Timing, Place, and Procedure for Filing a Counterclaim

4.1. Time Requirement: Submitted with the Response Petition or within the specified time period

The general principle in the Code of Civil Procedure is that counterclaims within the time limit for filing a response . The number of days for the response period may vary depending on the type of case and the procedural rules; however, as a rule:

The response period granted from the date of notification of the lawsuit ,
It also serves as a limit for filing a counterclaim.

After this period, as a rule, a counterclaim cannot be filed; if it is filed, a separate lawsuit . Exceptions to this are those that may be accepted with the explicit consent of the parties or by the judge on grounds of procedural economy; however, these are quite limited in practice.

4.2. Content of the Counterclaim

The counterclaim must meet the general conditions for a statement of claim as stipulated in the Code of Civil Procedure:

The name of the court,
The parties' identity and address information,
The counterclaim must be stated clearly and specifically
The events must be described clearly, chronologically, and in a manner suitable for legal characterization
The legal grounds must be stated (e.g., contracts for work, lease agreements, grounds for divorce, etc., as defined in the Turkish Code of Obligations)
Presenting the evidence individually,
The conclusion and request section should clearly and unequivocally state the demand.

The defendant filing the counterclaim both their defense in the response to the main lawsuitand their claims and evidence relating to the counterclaim. A common mistake in practice is preparing the counterclaim merely as an "additional defense statement," without clearly stating the claim and legal grounds.

4.3. Rules of Duty and Authority

A counterclaim is filed in the same court where the main case is being heard. However, this does not mean that the court has jurisdiction automatically. Two possibilities are important:

In terms of function:
- The court handling the main case must also have jurisdiction over the counterclaim.
- For example, filing a counterclaim for unpaid wages, which falls under the jurisdiction of a labor court, in a land deed cancellation case being heard in a Civil Court of First Instance, would create a jurisdictional problem.
In terms of authority:
- If the main lawsuit has been filed in a competent court, for reasons of connection and procedural economy, a counterclaim may also be filed in the same court.
- However, if the question of absolute jurisdiction regarding a counterclaim arises, further evaluation is necessary (for example, certain lawsuits concerning the ownership of immovable property)

If there is a defect in jurisdiction or authority, it is possible to face a procedural dismissal of the counterclaim .

5. The Strategic Importance of the Counterclaim

A counterclaim is not merely a technical procedural tactic; for experienced practitioners, it is one of the most important elements of litigation strategy.

5.1. Procedural Economy and Cost Advantage

Resolving disputes arising from the same event or contract in a single case:

That witnesses be heard all at once,
Obtaining expert reports through a single file,
It ensures that the evidence is evaluated within the same hearing and process.

This translates into significant time and cost savings for both the parties and the judiciary. In practice, especially:

Construction contract (contractor-employer),
Sales contract (claims of defects and payment claims),
Lease agreement (eviction and rent arrears),

In relationships like these, counterclaims are one of the tools that best serve procedural economy.

5.2. Increasing Bargaining Power and Forcing the Plaintiff to Back Down

When the defendant only resorts to denial and defenses, the plaintiff often maintains the psychological advantage . However, the defendant:

His own receivables, compensation claims,
If the party raises effective claims such as termination, adaptation, or cancellation of the contract through a counterclaim,

From the plaintiff's perspective, the situation changes. Now the plaintiff also has to present a defense against the defendant. This situation is as follows:

It strengthens the defendant's hand in settlement negotiations
It softens the plaintiff's overly aggressive demands and increases the likelihood of reaching a reasonable settlement.

For example, when a business owner sues a contractor for defective workmanship and faces a high-value counterclaim from the contractor, they often become more cautious and lean towards a settlement.

5.3. Preventing Contradictory Decisions

If the main lawsuit and the counterclaim were heard in separate files and in different courts, conflicting decisions being made regarding the same contract or event would increase. Thanks to the counterclaim:

The judge sees the entire dispute in a single picture
We evaluate the evidence together,
It establishes a consistent argument for both the main claim and the counterclaim .

This is a major gain in terms of legal certainty and predictability.

5.4. Interruption of Statute of Limitations and Prevention of Loss of Rights

In some cases, the defendant's claim may be nearing the statute of limitations. This happens when the main lawsuit is filed unexpectedly

The defendant can file a counterclaim and have their own claim immediately decided upon
This way, they can avoid the statute of limitations expiring or the need to file a new lawsuit in the future.

In this respect, a counterclaim serves not only as a defense but also as a proactive measure against risks of forfeiture and statute of limitations

6. Differences Between Counterclaim and Set-Off Defense

Counterclaims and set-off defenses are often confused because both are based on the defendant's claim. However, there are important differences between them:

6.1. Exchange Definition

purely defensive in nature.
A separate lawsuit is not filed; it is only raised in the response brief or as a defense during the trial.
The plaintiff's claim is rejected to the extent of the amount offset; however, if the defendant's claim exceeds the plaintiff's claim, a separate lawsuit must be filed.
No fees are charged, and there are no formal obligations such as deadlines for filing a lawsuit (however, statutes of limitations and procedural rules are still important).

6.2. Counterclaim

It is an independent case; it is subject to fees.
The defendant obtains a positive ruling (collection or determination) regarding their claim
Even if the claim exceeds the plaintiff's entitlement, a decision will be made on the entire amount.
There will be no need to file a separate lawsuit in the future; enforcement proceedings based on the judgment can be initiated after the counterclaim judgment becomes final.

Because of these differences;

The defendant, who only wanted to reduce the plaintiff's claim,
- He preferred the barter option to avoid expense and keep the procedure simple
The defendant, who also sought a clear and enforceable judgment regarding his own claim,
- a counterclaim .

7. Application Areas of Filing Counterclaims: Example Scenarios

7.1. Counterclaim in Divorce Cases

The best-known example of a counterclaim in family law is divorce proceedings. When one spouse files for divorce, the other spouse can:

In the same file, based on a different ground for divorce,
Or by presenting additional facts to support the same reason,

They can file a counterclaim. Thus:

Which side is at fault,
Claims such as alimony, compensation, and child custody,

The decision is made in a single, comprehensive manner. This serves both procedural efficiency and reduces disputes between the parties regarding "whose case was accepted.".

7.2. Counterclaim in Contracts for Work

In a construction contract between a contractor and a client, the client often:

Defective performance,
Delay,
Incomplete work

The contractor is filing a compensation lawsuit for reasons such as these. In this lawsuit, the contractor:

For unpaid work fees,
They can file a counterclaim based on the same contract.

In this case, the court will decide through an expert opinion:

The value of the work,
The rate of defect,
The effect of the delay,

It calculates everything as a whole and makes a decision with a single calculation for both the main claim and the counterclaim. This is one of the most common and rational examples of counterclaims in practice.

7.3. Counterclaims in Commercial Litigation

Commercial relationships typically involve multiple invoices, shipments, services, or credit relationships between parties. For example:

When a bank files a lawsuit to recover debts arising from a loan it granted to a customer,
The customer can also file a counterclaim for reasons such as unfair interest, insurance deductions, early repayment penalties, etc.

In such a scenario, the court would examine the entire credit relationship:

The bank's receivables,
The customer's claim for compensation/reimbursement,

They can resolve the issue in a single file.

8. Disadvantages and Considerations Regarding a Counterclaim

Like any powerful instrument, counterclaims risks .

8.1. Risk of Fees and Expenses

Because the counterclaim is an independent case:

A separate fee is paid
Items such as expert witness fees and witness expenses increase
If the counterclaim is dismissed, the defendant may then pay the opposing party's legal fees .

Filing unfounded counterclaims solely to create psychological pressure can have severe economic consequences for the client.

8.2. Burden of Evidence and Difficulty of Proof

In the main lawsuit, the plaintiff bears the burden of proof; the defendant can often simply deny the claim. However, when a counterclaim is filed:

The counterclaimant (former defendant) bears the burden of proving the claim or right they assert
If there is insufficient documentation, witness testimony, or expert reports, the counterclaim may be dismissed, which could negatively impact the perception of the main case.

Therefore, the evidence must be thoroughly analyzed when considering a counterclaim.

8.3. Risk of Unnecessarily Prolonging the Trial

Although counterclaims may seem positive in terms of procedural economy, in some cases:

To the point of the subject becoming too broad,
Further witnesses and experts should be heard
The trial dragged on for years

This can lead to complications. In particular, "inflating" a simple debt collection case with a very extensive and weighty counterclaim requiring proof may sometimes not be in the client's best interest.

9. Strategic Checklist Before Filing a Counterclaim

When deciding whether or not to file a counterclaim, a defense attorney should ask themselves the following questions:

Do we have a strong claim or demand that is connected to the main case?
Can this claim be protected solely by the defense of set-off, or does it necessarily be formalized in a court judgment ?
Do we have enough evidence? Are the documents, correspondence, witnesses, and technical materials to be presented to the expert ready?
the fees and expenses to be paid for the counterclaim proportionate to the expected gain ?
Will filing a counterclaim increase the plaintiff's willingness to compromise , or will it create unnecessary tension?
Is the prolongation of the trial in the client's favor or against them? (For example, issues such as interest accrued over time, inflation, and commercial reputation)

The answers to these questions could either make filing a counterclaim an effective strategic move , or indicate that it would be better not to file one at all.

10. Conclusion: A Counterclaim is Not Just a Technical Right, but a Strategic Choice

A counterclaim is a powerful procedural tool, defined by Article 132 of the Code of Civil Procedure, and usable under specific conditions. When used correctly:

the defendant an active position .
It serves procedural economy,
It prevents contradictory decisions
It increases bargaining power and strengthens the likelihood of reaching a compromise
It can reduce the risks of statute of limitations and forfeiture periods.

However;

Lack of evidence,
Court fees and litigation costs,
unnecessarily prolonging the trial
should not be ignored.

Therefore, the decision to file a counterclaim should be made consciously, taking into account the provisions of the Code of Civil Procedure , the precedents of the Supreme Court , the specifics of the case, and the client's economic/psychological goals

HMK, Legal Consultancy, Istanbul Lawyer, Counterclaim, Civil Procedure Law, Party Capacity

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