Non-disclosure agreements are among the most widely used legal documents in business. Whether you're protecting trade secrets, client data, or proprietary processes, understanding how NDAs work is essential before you sign — or ask someone else to sign — one.
Below are answers to the questions we hear most often about NDAs.
What is a non-disclosure agreement (NDA)?
A non-disclosure agreement is a legally binding contract that creates a confidential relationship between parties. The signing party agrees not to share specified information with third parties. NDAs protect trade secrets, business strategies, client lists, proprietary technology, and other sensitive information from unauthorized disclosure.
NDAs go by several names — confidentiality agreements, proprietary information agreements, or secrecy agreements — but they all serve the same purpose.
When do I need an NDA?
You need an NDA whenever you're sharing sensitive business information with someone outside your organization. Common scenarios include:
- Hiring freelancers or contractors who will access your systems or data
- Pitching to investors and sharing financial projections or product roadmaps
- Entering partnership discussions that involve sharing operational details
- Sharing proprietary processes with vendors or suppliers
- Onboarding new employees with access to trade secrets
- Licensing intellectual property before formal patent protection is in place
If the information could harm your business when made public, an NDA is worth considering.
What is the difference between a mutual and unilateral NDA?
A unilateral NDA protects one party's information — the disclosing party shares secrets, and the receiving party agrees not to disclose them. A mutual NDA (also called a bilateral NDA) protects both parties equally, meaning both sides share confidential information and both agree to keep it secret.
Mutual NDAs are standard in partnerships, joint ventures, and merger negotiations. Unilateral NDAs are more common when one party clearly holds the sensitive information, such as an employer with a new hire.
Are NDAs legally enforceable?
Yes, NDAs are enforceable in most jurisdictions when they meet basic contract requirements: offer, acceptance, consideration, and mutual intent. To maximize enforceability, the NDA should:
- Clearly define what information is confidential
- Set a reasonable duration
- Specify the jurisdiction and governing law
- Be signed by all parties
Overly broad or unreasonable NDAs may be struck down by courts. A clause claiming "all information exchanged is confidential forever" is far less enforceable than one with specific categories and a defined term.
How long does an NDA last?
NDA duration varies by agreement and purpose:
- Standard business NDAs: 1 to 5 years
- Trade secret NDAs: Indefinite (protection lasts as long as the secret remains a secret)
- Employment NDAs: Often survive the employment relationship by 2 to 3 years
- M&A and investment NDAs: Typically 2 to 5 years
The duration should match the realistic lifespan of the confidential information. Setting an unreasonably long term can weaken enforceability.
What happens if someone violates an NDA?
If someone breaches an NDA, the disclosing party can seek legal remedies including:
- Monetary damages for financial losses caused by the breach
- Injunctive relief — a court order to stop further disclosure
- Recovery of legal fees (if the NDA includes an attorney's fees clause)
- Liquidated damages — a predetermined amount specified in the NDA
The strength of your case depends on how clearly the NDA was written, how well you can prove the breach, and the actual damages suffered.
Can I write my own NDA without a lawyer?
Yes. Many businesses use contract generators and templates to create NDAs for routine situations like freelancer agreements or vendor relationships. For standard business NDAs, a well-structured template covering the essential clauses — definition of confidential information, obligations, duration, exclusions, and remedies — is often sufficient.
For high-stakes situations involving significant IP or large transactions, legal review is recommended. Create your NDA now →
What information should an NDA protect?
An NDA should clearly define what counts as confidential information. Common categories include:
- Trade secrets and proprietary formulas
- Business plans and financial data
- Customer and client lists
- Marketing strategies and pricing structures
- Software source code and product designs
- Employee or contractor details
Be specific — overly vague definitions weaken enforceability. The more precise your definition, the easier it is to prove a breach.
Do NDAs work across state or country borders?
NDAs can be enforced across borders, but enforcement depends on the jurisdictions involved. Including a governing law clause (which jurisdiction's laws apply) and a dispute resolution clause (where disputes will be settled) strengthens cross-border enforceability.
International NDAs should account for differences in trade secret law between countries. Some jurisdictions offer stronger trade secret protection than others.
What are common exclusions in an NDA?
Standard NDA exclusions include:
- Information that was already publicly known before the NDA was signed
- Information the receiving party already possessed independently
- Information received from a third party without confidentiality obligations
- Information independently developed without using confidential material
- Information required to be disclosed by law or court order
These exclusions prevent the NDA from being unreasonably broad and are standard in virtually every well-drafted NDA.
Need a professionally structured NDA for your business? Create your NDA on contract.diy →