A nondisclosure agreement is a binding contract in which one or both parties promise not to share specified confidential information with anyone outside the agreement. Businesses use them before hiring, licensing, partnering, or selling, because handing over trade secrets, financial records, or product plans is risky without a legal consequence attached to leaks. The agreement works by defining exactly what counts as confidential, who is bound, how long the obligation lasts, and what the injured party can do if the other side talks.
Unilateral or Mutual
Every NDA is one of two shapes. A unilateral NDA protects one side only: one party discloses, the other receives and keeps quiet. This fits employer-to-employee situations and most vendor negotiations, where information flows in one direction.
A mutual NDA binds both sides to protect each other’s information. Joint ventures, merger talks, and technology partnerships almost always use this form because both parties will be opening their books. If you are both sharing and receiving, a unilateral agreement leaves your own disclosures unprotected. Insist on mutual terms in that situation.
When Companies Use NDAs
Hiring is the most common trigger. A candidate interviewing for a senior role may hear about proprietary software architecture, unreleased product plans, or customer pricing. The NDA ensures that if the candidate goes elsewhere, those details stay behind. Short-term contractors and consultants who rotate through competing firms sign them for the same reason.
Mergers and acquisitions require them during due diligence. A prospective buyer needs tax returns, outstanding liabilities, and internal projections to set a price, and the seller needs legal consequences on the table if the deal collapses and the buyer walks away with that information.
Vendor and supplier relationships are the third major use. A manufacturer sharing a chemical formula or blueprint to get a materials quote has no protection, absent an NDA, against that supplier passing the specifications to a competitor or using them to develop a rival product.
One point of confusion worth clearing up: an NDA is not a non-compete. An NDA restricts what you can say about specific information. A non-compete restricts where you can work. The two can appear in the same employment contract, but they are separate obligations judged by separate standards.
What Belongs in the Agreement
Four elements determine whether an NDA will actually do its job.
The parties. Identify everyone by full legal name and registered business address. For individuals, use the name on government-issued identification. For companies, use the name on corporate filings. If the entity named in the NDA is not the entity that actually disclosed or received the information, a court may refuse to enforce the agreement.
The definition of confidential information. This is the most important clause and the one most often botched. Vague language like “all business information” invites challenges. Effective NDAs list specific categories: customer lists, pending patent applications, unreleased product designs, financial projections, source code, manufacturing processes. The more precisely you describe what is protected, the easier a breach is to prove.
The purpose. State why the information is being shared, whether that is evaluating a potential acquisition, performing consulting services, or something else. A clear purpose clause limits how the receiving party can use the information even if they never disclose it to anyone.
The duration. One to five years is common. Agreements protecting genuine trade secrets sometimes last indefinitely, or for as long as the information retains trade-secret status. A perpetual restriction on ordinary business information, by contrast, tends to look unreasonable to a court.
What the NDA Should Not Cover
A well-drafted agreement carves out categories that cannot fairly be treated as confidential. Four exclusions appear in nearly every enforceable NDA:
- Information that is already public, or that becomes public through no fault of the receiving party.
- Information the receiving party can show it already knew before signing.
- Information obtained independently from a third party who had no confidentiality obligation of their own.
- Information the receiving party develops on its own, without reference to what was shared.
These carve-outs do two things. They keep the receiving party from being trapped by information they would have learned anyway, and they show a court that the agreement was balanced rather than one-sided.
Federal Laws That Override NDA Language
No NDA can contract around certain federal protections. Drafters who ignore them lose remedies, invite enforcement actions, or forfeit tax deductions.
Whistleblower Notice Under the Defend Trade Secrets Act
Every employer must include a whistleblower immunity notice in any agreement governing the use of trade secrets or confidential information. The notice has to inform the employee that disclosing a trade secret to a government official or an attorney to report a suspected legal violation does not create criminal or civil liability, and that a trade secret may be disclosed in a lawsuit filing if the document is filed under seal.1Office of the Law Revision Counsel. 18 USC 1833 – Exceptions to Prohibitions
Skipping the notice has a direct cost. An employer that leaves it out forfeits the right to recover exemplary damages (up to double actual damages) and attorney fees if it later sues that employee for trade secret misappropriation.1Office of the Law Revision Counsel. 18 USC 1833 – Exceptions to Prohibitions Cross-referencing a separate reporting policy document provided to the employee satisfies the requirement; the full statutory language does not have to live inside the NDA itself.
SEC Communications
SEC regulations prohibit anyone from taking action to stop someone from communicating directly with the SEC about a possible securities law violation, including by enforcing or threatening to enforce a confidentiality agreement.2eCFR. 17 CFR 240.21F-17 – Staff Communications With Individuals Reporting Possible Securities Law Violations NDAs that purport to bar an employee from contacting the SEC are unenforceable on that point, and the SEC has brought enforcement actions against companies whose agreements contained such language.
NLRA Rights to Discuss Working Conditions
Under the National Labor Relations Act, employees have the right to discuss wages, working conditions, and workplace concerns with coworkers and outside organizations.3Office of the Law Revision Counsel. 29 USC 157 – Right of Employees as to Organization, Collective Bargaining, Etc. The National Labor Relations Board ruled in 2023 that overly broad confidentiality clauses in severance agreements violate those rights. Under that decision, merely offering a severance agreement with a sweeping confidentiality provision is an unfair labor practice, even if the employee never signs.4NLRB. Board Rules That Employers May Not Offer Severance Agreements Requiring Broad Waiver of NLRA Rights Confidentiality terms in severance and separation agreements need to be tied to specific trade secrets or proprietary data, not to workplace information generally.
Tax Treatment of Sexual Harassment Settlements
If a settlement or payment relates to sexual harassment or sexual abuse and is subject to an NDA, the paying party cannot deduct the payment or related attorney fees as a business expense.5Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses The rule does not affect the recipient’s ability to deduct their own attorney fees if those fees are otherwise deductible.6Internal Revenue Service. Section 162(q) FAQ Attaching an NDA to that kind of settlement makes the entire payment nondeductible for the business, which changes the math on insisting that the matter stay quiet.
What Happens When Someone Breaches
An NDA earns its keep when it is tested. The injured party has several paths to relief, and strong cases pursue more than one at once.
Injunctions
The most urgent remedy is a court order stopping further disclosure or use of the protected information. Courts grant injunctions when the disclosing party can show that continued disclosure will cause irreparable harm, meaning damage money alone cannot fix. Many NDAs include a clause in which both parties acknowledge in advance that a breach would cause irreparable harm, which makes injunctive relief easier to obtain, though not automatic.
Damages Under the Defend Trade Secrets Act
If the confidential information qualifies as a trade secret related to a product or service in interstate commerce, the injured party can file a federal civil action under the Defend Trade Secrets Act.7Office of the Law Revision Counsel. 18 USC 1836 – Civil Proceedings To qualify as a trade secret under federal law, the information must derive economic value from being kept secret, and the owner must have taken reasonable steps to protect it.8Office of the Law Revision Counsel. 18 USC 1839 – Definitions
Available remedies under the DTSA include:
- Actual damages for losses caused by the misappropriation, plus any unjust enrichment the defendant gained that is not already reflected in those losses.
- A reasonable royalty, as an alternative measure, based on what the defendant should have paid for authorized use.
- Exemplary damages up to double the actual damages, when the misappropriation was willful and malicious.
- Attorney fees, when the misappropriation was willful and malicious or the claim was brought in bad faith.
The DTSA also includes an unusual remedy called ex parte seizure. In rare cases where a standard injunction would be ineffective because the defendant would destroy or hide the materials, a court can order seizure of property containing the trade secret without advance notice to the defendant.7Office of the Law Revision Counsel. 18 USC 1836 – Civil Proceedings Courts grant this only when the applicant demonstrates, among other requirements, that an immediate and irreparable injury will occur without the seizure and that the defendant would likely evade a conventional court order.
State Law Claims
Not every breach involves a federal-grade trade secret. Nearly every state has adopted some version of the Uniform Trade Secrets Act, which provides its own injunctive and damages remedies. For confidential information that falls short of trade-secret status, such as a client contact list that is valuable but not truly secret, the injured party typically brings a breach-of-contract claim in state court. Liquidated damages clauses, which set a predetermined penalty for a breach, are enforceable in most jurisdictions as long as the amount is a reasonable estimate of anticipated harm rather than an arbitrary punishment.
Attorney Fee Shifting
Many NDAs require the losing party in any enforcement dispute to pay the prevailing party’s attorney fees and court costs. These clauses change the economics of enforcement. Without one, a successful lawsuit may cost more to prosecute than the damages recovered. With one, both frivolous breaches and frivolous defenses get more expensive.
Why Courts Refuse to Enforce NDAs
Courts do not treat every NDA as ironclad, and the reasons they strike them down are predictable.
The most common defect is an overbroad definition of confidential information. If the agreement tries to sweep in everything an employee learned during their tenure, including general skills, industry knowledge, and publicly available information, a court may find the restriction unreasonable and refuse to enforce it.
Disguised non-competes are a second common target. If the confidentiality restrictions are so broad that they effectively prevent someone from working in their field, courts in several states treat the agreement as a restraint of trade. Some void those provisions entirely rather than narrowing them.
Lack of consideration is a less obvious problem. If an existing employee is asked to sign an NDA after starting work, and the employer offers nothing new in return (no raise, no bonus, no additional access), the agreement may lack the mutual exchange that contract law requires. The safer practice is to make the NDA part of the initial offer, or to tie it to a concrete new benefit.
Duration gets scrutinized too. A perpetual confidentiality obligation on routine business information looks unreasonable to most courts, even if the same duration would survive for genuine trade secrets. Matching the length of the restriction to the realistic shelf life of the information is what makes it hold up.