NDA (Non-Disclosure Agreement) Explained

Non-disclosure agreements are everywhere. You might sign one before a job interview, a business partnership discussion, a freelance project, or even a product demo. They're so common that many people sign them without reading — but an NDA is a legally binding contract that can have real consequences if you violate its terms.

This guide explains what NDAs actually require, what the different types mean, and where the hidden risks tend to live.

What Is an NDA?

A non-disclosure agreement (also called a confidentiality agreement) is a contract that restricts what you can share about information you receive during a business relationship. It creates a legal obligation to keep certain information private and defines the consequences if you don't.

NDAs protect trade secrets, business strategies, client lists, financial data, unreleased products, and other sensitive information that could harm the disclosing party if made public.

Mutual vs. One-Way NDAs

The type of NDA determines the balance of obligations.

One-way (unilateral) NDA

Only one party discloses confidential information, and only the receiving party has obligations. Common in employment, vendor relationships, and situations where one party has significantly more to protect.

Mutual (bilateral) NDA

Both parties share confidential information, and both have obligations to protect it. Common in business partnerships, joint ventures, and merger/acquisition discussions. Mutual NDAs are generally fairer since both sides have skin in the game.

Defining "Confidential Information"

This is the most important section of any NDA. The definition of confidential information determines what you're actually obligated to protect.

What to look for

• Broad vs. specific definitions — some NDAs define confidential information very broadly ("all information shared in connection with the relationship"). Others list specific categories. Overly broad definitions put you at risk of accidentally violating the agreement
• Standard exclusions — a well-drafted NDA should exclude: information that's publicly available, information you already knew, information received from a third party, and information independently developed
• Marking requirements — some NDAs only protect information that's explicitly marked as "confidential." Others protect all information regardless of marking. Know which standard applies

Duration and Survival

NDAs don't last forever — or they shouldn't. The duration section defines how long the agreement is in effect and how long your confidentiality obligations survive after the relationship ends.

What to look for

• The term of the NDA itself (how long the parties will share information)
• The survival period for confidentiality obligations (typically 2-5 years after the NDA expires). Trade secrets may have longer or indefinite protection
• Perpetual NDAs — these never expire and are increasingly disfavored. If you see one, negotiate a reasonable end date

Permitted Disclosures

Even under an NDA, there are situations where you may need to share information — with your lawyer, your accountant, a court, or a government agency. A well-drafted NDA accounts for these.

What to look for

• Whether you can share information with your own legal and financial advisors
• Whether court-ordered or legally required disclosures are permitted (they should be)
• Whether you must notify the other party before making a permitted disclosure
• Whether employees or contractors who need access are covered under the NDA or need separate agreements

Remedies for Breach

This section defines what happens if someone violates the NDA. Most NDAs allow the disclosing party to seek injunctive relief (a court order to stop the breach) and monetary damages.

What to look for

• Liquidated damages — a pre-set dollar amount for breach, regardless of actual harm. These can be unreasonable if the amount is disproportionate
• Indemnification — are you on the hook for the other party's legal costs if they claim a breach?
• Injunctive relief — standard and expected. This allows the other party to get a court order quickly

Red Flags to Watch For

• Overly broad confidential information definition — if literally everything is confidential, you have no safe harbor
• No standard exclusions — the absence of carve-outs for public information and independent development is a serious issue
• Perpetual duration — confidentiality obligations that never expire are unreasonable for most business relationships
• Liquidated damages without a cap — pre-set penalties that could be financially devastating
• Non-mutual obligations in a mutual context — if both sides are sharing, both sides should have equal protections
• No permitted disclosure for legal proceedings — you should always be able to share information when legally required

Questions to Ask Before Signing

1. Is this a mutual or one-way NDA? Should it be mutual given our relationship?
2. How is "confidential information" defined? Is it specific enough?
3. Are the standard exclusions present (public info, prior knowledge, independent development)?
4. How long do my confidentiality obligations last after the NDA ends?
5. Can I share information with my lawyer and accountant?
6. What are the consequences of breach? Are there liquidated damages?
7. What happens to confidential materials when the NDA expires — must I return or destroy them?

How DecipherDocs Can Help

Upload your NDA to DecipherDocs for a free plain-English analysis. We'll identify whether the definition of confidential information is reasonable, flag any one-sided obligations, and highlight the terms you should negotiate before signing.

DecipherDocs provides educational information about legal documents. This is NOT legal advice. Always consult a qualified attorney before making legal decisions. Read our full disclaimer.