My NDA Has No End Date. Am I Bound Forever?

Two different durations in most NDAs

Many NDAs have two time periods, and they are easy to confuse. The first is the term of the agreement: the period during which information is exchanged, such as the length of a project or discussions. The second is the confidentiality period: how long you must keep information secret after it was disclosed. An NDA can end as an agreement while its confidentiality obligations survive for years. When people say an NDA has no end date, they usually mean the confidentiality period is unlimited.

How long are trade secrets protected under an NDA?

Trade secret law protects information that has economic value because it is secret and that the owner takes reasonable steps to protect, such as formulas, source code, processes and some customer data. Trade secret protection lasts as long as the information remains secret. Because of that, an NDA obligation that lasts as long as the information is a trade secret is generally reasonable, and many carefully drafted NDAs say exactly that: a fixed term for ordinary confidential information, and an indefinite term for trade secrets.

Separately, the federal Defend Trade Secrets Act and state trade secret laws protect trade secrets whether or not an NDA exists, so information that qualifies is protected anyway.

What legally counts as a trade secret?

Because an indefinite term is easiest to justify for trade secrets, it helps to know what the law actually treats as one. Under the federal Defend Trade Secrets Act, a trade secret can be any form of financial, business, scientific, technical, economic or engineering information, but only if two things are true: the owner has taken reasonable measures to keep it secret, and it has independent economic value from not being generally known or readily ascertainable by others (18 U.S.C. § 1839(3)). California's version of the Uniform Trade Secrets Act uses a similar two-part test (Cal. Civ. Code § 3426.1(d)). Most states have adopted that uniform act; New York relies on rules developed by its courts.

Those tests explain why an open-ended NDA covering everything is hard to defend. Last year's price list, general industry know-how, or information already in a trade publication will usually fail one of the tests, so the legal case for protecting it forever is weak. A genuine formula, unreleased source code or a confidential customer analysis may pass both tests for many years.

This gives you a practical negotiating line. Ask that the indefinite obligation apply only to information that qualifies as a trade secret under applicable law, ideally identified or marked when disclosed, with a fixed term for everything else. Most reasonable counterparties accept this, because it protects what they actually care about.

If the other side refuses any split, ask them to explain which information needs permanent protection and why. The answer often shows the perpetual term was a template default rather than a deliberate choice. A short written answer from them is also useful evidence of what the parties intended.

Ordinary confidential information

Most NDAs define confidential information far more broadly than trade secrets. They cover pricing, plans, business discussions, and sometimes everything disclosed. For this wider category, an obligation that never ends is harder to justify. Some courts, in some states, have refused to enforce unlimited confidentiality for non-trade-secret information, treating it as an unreasonable restraint. Others enforce the contract as written. Results vary by state and by facts, so do not rely on a court refusing to enforce it.

When does information stop being confidential under an NDA?

Even an indefinite NDA almost always includes standard exclusions. Information that becomes public through no fault of yours, that you already knew, that you received independently from someone else, or that you developed independently is not covered. In practice, much information loses confidential status over time: products launch, plans are announced, prices change. An indefinite NDA does not keep public information secret.

What it means for your work

For employees and contractors, an indefinite NDA mainly restricts disclosing or using the other party's actual secrets. It does not, on its own, stop you from using your general skills, knowledge and experience in a new job. Clauses that try to do that start to look like non-competes, which are subject to different rules. If your NDA seems to prevent you from working in your field, read our guide on whether an NDA can stop you working for a competitor.

What a fair NDA duration looks like

Asking for this structure is a reasonable request that most counterparties accept.

• For ordinary business information: two to five years from disclosure is common.
• For trade secrets: as long as they remain trade secrets.
• For personal data: as long as required by privacy law and the contract.
• For information disclosed in a deal or evaluation: often one to three years.

What if you already signed an NDA with no end date?

You remain bound by what you signed, but the practical scope is narrower than it may seem. Identify the information that is still genuinely secret, keep treating it as confidential, and return or destroy materials if the NDA requires it. If you have a specific concern, such as a new role that touches the same area, get advice on your state's approach before assuming the clause is unenforceable.

A worked example

Rhea signed a consulting NDA with no end date in 2019. In 2026 she is offered work with another company in the same industry. Most of what she learned, including product plans and a pricing model, has since become public or out of date. A proprietary data-cleaning process remains secret. Her practical obligation is to avoid using or disclosing that process and any remaining non-public data. The NDA does not stop her from taking the job or using her general expertise.

Sample wording you can propose

"The Recipient's obligations will continue for three years after the date of each disclosure, except that obligations regarding trade secrets will continue for as long as the information remains a trade secret under applicable law."

Common mistakes

• Confusing the term of the agreement with the confidentiality period.
• Assuming an indefinite NDA is automatically unenforceable.
• Forgetting that public information is not covered.
• Treating general skills and experience as confidential information.
• Not asking for a fixed term before signing.

Quick checklist

• Is there a separate confidentiality period, and how long is it?
• Are trade secrets treated differently from other information?
• Are the standard exclusions included?
• Does the NDA require return or destruction of materials?
• Which state's law governs?
• Does the NDA try to restrict your general skills?

Key terms explained

These terms decide how long an NDA really lasts.

• Term: the period during which the agreement is active and information is exchanged.
• Confidentiality period: how long obligations last after disclosure.
• Survival clause: wording that keeps certain obligations in force after the agreement ends.
• Trade secret: information with value because it is secret and reasonably protected.
• Standard exclusions: categories of information not covered, such as public information.

Return and destruction after the relationship ends

Indefinite NDAs often require you to return or destroy materials when the relationship ends or on request. Complying helps in two ways: it reduces the risk of accidental disclosure, and it limits what you are responsible for protecting over time. If you still hold old files from a past engagement, review them, keep only what you are allowed and need to keep for legal or tax reasons, and securely delete the rest. Make a short note of what you deleted and when.

Mutual NDAs and indefinite terms

If the NDA is mutual, an indefinite term binds the other side too. That can be useful if you shared your own sensitive methods or pricing. When negotiating, point out that a fixed term for ordinary information and indefinite protection for trade secrets protects both parties fairly, and avoids either side policing stale information for decades.

Personal data

If the NDA covers personal data, privacy laws and data processing terms may require deletion or protection for a defined period, separate from the NDA's own term.

Questions to ask before signing

Ask why an unlimited term is needed, which information is genuinely a trade secret, and whether a fixed term for everything else would work. Most counterparties accept a split term once asked.

Get a fixed term before you sign

The easiest time to fix an indefinite NDA is before signing. Upload the NDA to see its term, survival and exclusions in plain English, and whether the confidentiality obligations go further than they need to.