A non-disclosure agreement, often called an NDA, is a binding contract in which one or more parties promise to keep specified information confidential. You’ll see one when you start a new job, evaluate a possible acquisition, pitch an idea to a potential partner, or settle certain disputes. The contract defines what counts as confidential, how long you have to protect it, and what the other side can do if you talk. It also has real limits: federal law carves out categories you can’t be silenced about, and some NDA-covered payments carry tax consequences the drafter may not mention.
The Three Basic Structures
A unilateral NDA runs one way. One side shares sensitive information and the other agrees to protect it. This is the version most employees sign on day one and the version a contractor signs before being shown proprietary systems. Only the receiving party takes on confidentiality duties.
A mutual NDA binds both sides equally. When two companies explore a merger or joint venture, each one opens its books, so each one needs protection. Mutual NDAs are standard in deal talks because neither side wants to be the only one exposed.
A multilateral NDA covers three or more parties under one document. These appear in multi-company research collaborations and complex partnerships where drafting separate two-party agreements for every pairing would be impractical.
What the Agreement Actually Protects
The most important clause in any NDA is the definition of “confidential information.” Everything the agreement reaches flows from that definition. Typical categories include manufacturing processes, proprietary software, financial data, pricing strategies, customer lists, and unreleased product designs. The more specific the definition, the easier it is to enforce. A vague catchall like “all business information” invites disputes about what was actually covered.
Most NDAs require the disclosing party to mark written materials “Confidential” or “Proprietary” before handing them over. For information shared verbally, the disclosing party usually has to follow up in writing identifying what was confidential, often within a set window such as twenty days. Without that paper trail, the receiving party can argue they had no way to know a particular conversation was meant to be protected.
When Something Qualifies as a Trade Secret
NDAs frequently invoke trade secret protection, and federal law sets a specific bar. Under the Defend Trade Secrets Act, information qualifies as a trade secret only if the owner has taken reasonable steps to keep it secret and the information derives economic value from not being publicly known.1Office of the Law Revision Counsel. 18 USC 1839 – Definitions That “reasonable steps” requirement is where many businesses stumble. If a company calls a formula a trade secret in its NDA but emails it to a 200-person distribution list with no access controls, a court is unlikely to agree the information was actually secret. An NDA alone doesn’t make something a trade secret; the owner still has to behave like the information matters.
What’s Carved Out
Every well-drafted NDA excludes categories of information the receiving party has no duty to protect, even if the disclosing party stamps them “Confidential”:
- Information already public when disclosed, or that later becomes public through no fault of the receiving party.
- Information the receiving party can prove it already knew before signing.
- Information the receiving party independently develops without using the discloser’s data.
- Information received from a third party who owed the discloser no confidentiality duty.
- Information you’re legally compelled to disclose through a court order, subpoena, or regulatory investigation. Most NDAs require you to notify the disclosing party first so they can seek a protective order narrowing what gets revealed.
What an NDA Cannot Stop You From Doing
An NDA cannot legally gag you from reporting potential wrongdoing to the government. This is the single most misunderstood feature of these agreements, and it matters whether you’re signing one or deciding what to do about something you’ve seen at work.
Reporting to the Government
The Defend Trade Secrets Act gives explicit immunity to anyone who discloses a trade secret to a federal, state, or local government official, or to an attorney, for the purpose of reporting or investigating a suspected violation of law.2Office of the Law Revision Counsel. 18 USC 1833 – Exceptions to Prohibitions The same immunity covers disclosures made in sealed court filings in a lawsuit. No NDA overrides this protection.
Employers are required to include notice of this immunity in any contract or agreement governing trade secrets or confidential information. If an employer skips the notice, the penalty hits where it hurts: the employer loses the ability to recover exemplary damages or attorney fees if it later sues that employee for misappropriation.2Office of the Law Revision Counsel. 18 USC 1833 – Exceptions to Prohibitions A cross-reference to a company policy document explaining the reporting process satisfies the requirement.
Talking to the SEC
Securities Rule 21F-17 prohibits any person from taking action to impede someone from communicating directly with SEC staff about a possible securities law violation, including by enforcing or threatening to enforce a confidentiality agreement.3eCFR. 17 CFR 240.21F-17 The SEC has brought enforcement actions against companies whose confidentiality terms discouraged employees from contacting regulators.4U.S. Securities and Exchange Commission. Whistleblower Protections
Discussing Work With Coworkers
The National Labor Relations Board has ruled that employers violate federal labor law when they offer severance agreements requiring employees to broadly waive their rights under the National Labor Relations Act.5National Labor Relations Board. Board Rules That Employers May Not Offer Severance Agreements Requiring Employees to Broadly Waive Labor Law Rights Those rights include organizing, discussing working conditions with coworkers, and engaging in collective action.6National Labor Relations Board. Interfering with Employee Rights (Section 7 and 8(a)(1)) An NDA or severance clause that bars you from talking to fellow employees about working conditions, or that broadly bans any disparagement of the employer, can cross this line.
How Long the Obligations Last
Most NDAs don’t run forever. The agreement should spell out a confidentiality period under a heading like “Term,” “Duration,” or “Survival.” For ordinary business information, obligations commonly run one to five years from disclosure or from the end of the business relationship. Information that goes stale quickly, like current pricing, may warrant a shorter window. Technical know-how often justifies a longer one.
Trade secrets are the exception. Because trade secret protection lasts only as long as the information stays genuinely secret, many NDAs impose indefinite obligations on anything that qualifies. If a formula still has competitive value twenty years out, there’s no reason the confidentiality duty should sunset at five.
Most NDAs also require the receiving party to return or destroy all confidential materials once the agreement ends or the relationship wraps up. Return-or-destroy clauses typically set a deadline of thirty to sixty days and may require written certification that destruction is complete. Some give the disclosing party the choice between return and destruction. Others let the receiving party keep copies only to the extent law or compliance policy requires. If you’re signing, read this clause closely; it tells you what you’ll have to scrub from your email and cloud storage later.
The Tax Hit on Harassment Settlements
If a settlement or payment relates to sexual harassment or sexual abuse and is subject to a nondisclosure agreement, the payor cannot deduct the settlement amount or the related attorney fees as a business expense.7Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses This provision came in with the Tax Cuts and Jobs Act. A company paying a $500,000 harassment settlement under an NDA loses the deduction on the full amount plus legal costs. The IRS has clarified that the restriction applies only to the payor; the person receiving the settlement can still deduct their own attorney fees if those fees would otherwise be deductible.8Internal Revenue Service. Section 162(q) FAQ
What Happens If Someone Breaches
When an NDA is broken, the disclosing party has several routes to recovery. Which one fits depends on the information involved, whether the breach was deliberate, and what the agreement itself says.
Stopping the Leak
The first move in most NDA disputes is stopping further disclosure. Courts can issue injunctions ordering the breaching party to stop sharing or using the protected information.9Office of the Law Revision Counsel. 18 USC 1836 – Civil Proceedings A preliminary injunction can come early in the case, before anything is proven at trial, if the disclosing party shows that waiting would cause irreparable damage. Many NDAs include language stating that any breach automatically constitutes irreparable harm, which makes that early order easier to secure. Once a trade secret leaks publicly, money alone can’t fully undo the damage.
Money Damages
The Defend Trade Secrets Act lets a court award damages for actual losses caused by the misappropriation, plus any unjust enrichment the breaching party gained that isn’t already captured in the loss figure.9Office of the Law Revision Counsel. 18 USC 1836 – Civil Proceedings A court can instead impose a reasonable royalty for the unauthorized use. The practical difficulty is proving exactly how much the breach cost, which is why some agreements include a liquidated damages clause fixing a predetermined penalty. That clause is enforceable only if the amount is a reasonable estimate of anticipated harm at the time of signing; courts strike figures that look like punishment rather than approximation.
When a breach is willful and malicious, the Act lets courts award exemplary damages of up to twice the compensatory amount.9Office of the Law Revision Counsel. 18 USC 1836 – Civil Proceedings Courts can also award reasonable attorney fees to the winner when the misappropriation was willful or when either side acted in bad faith during the litigation. An employer that failed to include the whistleblower immunity notice forfeits both of those remedies against the affected employee.2Office of the Law Revision Counsel. 18 USC 1833 – Exceptions to Prohibitions
Filing Deadline
For claims under the Defend Trade Secrets Act, the deadline is three years from the date the misappropriation was discovered or should have been discovered. State-law claims for breach of a written contract generally allow four to six years, with the exact window set by the jurisdiction. Waiting too long after learning of a breach can lose the case no matter how strong the underlying facts are.