How to Claim Damages for Breach of Confidentiality

Confidentiality underpins trust in commercial relationships, employment, intellectual property protection and many other interactions. When someone discloses or misuses confidential information without authorisation, the injured party may suffer financial loss, reputational harm or competitive disadvantage. In England and Wales, the law recognises both contractual and equitable duties of confidence, and provides remedies - including damages - when those duties are breached. This article explains what a breach of confidentiality is, how to claim damages, legal tests and evidential requirements, procedural steps and practical considerations for businesses and individuals.

What Is a Breach of Confidentiality?

A breach of confidentiality occurs when confidential information is disclosed, used or shared without authorisation in circumstances where a duty to keep it confidential exists. Confidentiality obligations may arise from:

• Contractual clauses (for example, in non‑disclosure agreements or employment contracts);
• Implied contractual duties where confidentiality is assumed by the nature of the relationship;
• Equitable duties of confidence recognised at common law even without a written contract; and
• Statutory obligations such as those under data protection laws (though remedies under data protection require separate consideration). The UK GDPR and Data Protection Act 2018 deal with privacy and personal data breaches under a distinct legal regime.

The English courts established that a duty of confidence can arise whenever information is given in circumstances where the recipient knows or ought to know it is confidential.

Legal Basis for Damages Claims

Contractual Breach

Where confidentiality is expressly or impliedly agreed in a contract, a breach may entitle the injured party to damages for breach of contract. When drafting a contract, parties frequently include confidentiality clauses and may specify consequences or compensation mechanisms. If those clauses are breached, the claimant can seek monetary compensation for losses caused by that breach.

Common Law Duty of Confidence (Equitable)

Even absent a written contract, the courts will protect confidential information under the common law equitable duty of confidence if:

• The information has the necessary quality of confidence (not trivial or public);
• It was communicated in circumstances importing an obligation of confidence; and
• There was unauthorised use or disclosure of that information.

In such cases, remedies include damages, injunctions (to halt ongoing disclosure) and, where appropriate, an account of profits (requiring the breaching party to give up profits made from misuse).

What Can Damages Cover?

Damages for breach of confidentiality are designed to compensate the injured party for losses caused by the breach. Depending on the facts, this may include:

• Financial losses - loss of revenue, loss of a business opportunity or increased costs directly resulting from the breach;
• Costs of mitigating damage - reasonable expenses incurred to contain or correct the effects of the disclosure;
• Reputational harm - in limited cases where reputation has been demonstrably damaged; and
• Hypothetical negotiation value - where the confidential information had a commercial value that the claimant would have received had they licensed or sold it, assessed through “Wrotham Park” or “negotiation” damages.

The measure of damages depends on evidence of loss and the nature of the breach; quantifying non‑financial loss can be complex and often requires expert evidence in commercial cases.

Before Starting a Damages Claim

Gather Evidence

Before bringing a claim, collect records showing:

• The existence of the confidentiality obligation, such as a contract or NDA;
• The confidential information itself and why it is confidential;
• How the information was disclosed or misused without authorisation; and
• Proof of loss or damage, including financial records, communications and any steps taken to mitigate the harm.

Strong documentary evidence is crucial to demonstrate both the breach and resulting losses.

Pre‑Action Correspondence

In England and Wales, civil procedure rules encourage pre‑action communication before commencing court proceedings. Sending a Letter of Claim or a formal demand letter to the breaching party sets out:

• What confidential information was misused;
• The legal basis for your claim (contract or equitable duty);
• The losses suffered and amount claimed; and
• A deadline for response or settlement.

This step can prompt negotiation, reduce costs and fulfil pre‑action protocol standards.

How to Start a Claim for Damages

Issue a Claim in Court

If informal settlement fails, you can start a claim in the High Court or County Court depending on value and complexity. A claim form and particulars of claim must clearly:

1. Identify the confidential information and how it was protected;
2. Establish the existence of a duty of confidence (contractual or equitable);
3. Detail the unauthorised breach; and
4. Quantify the losses suffered and amount of damages sought.

The court will follow the Civil Procedure Rules (CPR), including applicable case management directions.

Possible Interim Remedies

While seeking damages, you might also apply for an injunction to prevent further misuse of confidential information. Injunctions are common where ongoing harm cannot be adequately compensated by money alone.

Time Limits for Bringing a Claim

In most cases under English law, the Limitation Act 1980 provides that you must bring a claim for breach of contract or actionable wrong within six years from the date of the breach. If you delay beyond this period, the court may refuse to hear the claim.

Common Defences in Confidentiality Claims

Defendants in confidentiality claims may raise several defences, such as:

• No duty of confidentiality existed - for example, if the information was not genuinely confidential or no agreement was in place;
• Information was already in the public domain at the time of disclosure;
• Disclosure was justified or in the public interest (e.g. under whistleblowing protections); or
• No loss or insufficient evidence of damage.

Each defence depends on factual nuances and may require expert legal analysis.

Practical Considerations

Contractual Drafting

When entering into agreements that involve sensitive information, clearly drafted confidentiality clauses with defined remedies and consequences for breach can improve enforceability and ease quantification of damages.

Alternative Dispute Resolution

Before resorting to litigation, consider mediation or arbitration, which may lead to faster, less costly resolution. Courts often encourage parties to attempt alternative dispute resolution before trial.

Costs and Risks

Litigation can be expensive. If a claim fails, you may be ordered to pay the other side's legal costs. Assess risks, realistic prospects of success and costs before proceeding.

Key Takeaways

Claiming damages for breach of confidentiality in England and Wales involves establishing that a duty of confidence existed (either by contract or at equity), demonstrating an unauthorised disclosure or misuse of confidential information, and showing that you suffered a loss as a result. Remedies include financial compensation, injunctions and other equitable relief. Successful claims depend on strong evidence, clear documentation of losses, and compliance with procedural requirements, including limitation periods and pre‑action protocols. Considering alternative dispute resolution and thoughtful contract drafting can also help resolve disputes efficiently and protect valuable confidential information.