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How long should an NDA last? Two to five years is typical for business information; genuine trade secrets can last as long as they stay secret; indefinite is a red flag. NDA term and survival clauses explained, with how to shorten an overlong one.
Updated July 15, 2026 · 5 min read
There is no single legal answer to how long an NDA should last, but there are strong norms. For most business information, a confidentiality term of two to five years is typical. Genuine trade secrets can be protected for as long as they stay secret. An indefinite or perpetual term is a common red flag, and rarely necessary.
This guide explains how NDA terms work, the difference between the term of the agreement and how long the confidentiality duty survives, what is reasonable for different kinds of information, and how to shorten a term that reaches too far. Read it before you agree to keep something secret forever.
It is general information, not legal advice. ClauseShift pulls the term and any survival clause out of your NDA and flags an indefinite duty, quoting the exact wording.
A duty that lasts 'in perpetuity' or has no end date is hard to live with, especially if you sign many NDAs, and rarely justified for ordinary business information. It leaves you policing a secret forever.
Ask for: Ask for a defined term, often two to five years, with an exception only for genuine trade secrets.
The NDA can end while the duty to keep quiet survives for many more years. That survival period is the clock that actually binds you long-term, and it is easy to miss.
Ask for: Ask to cap the survival period to a reasonable, defined window.
Some NDAs restart the clock each time new information is shared, so an ongoing relationship means the confidentiality duty effectively never ends.
Ask for: Ask for a fixed window measured from each disclosure or from the agreement date, not one that resets indefinitely.
Two opposite errors show up here: making everything last forever, or forcing genuine trade secrets to expire on a short fixed term that kills their protection early.
Ask for: Ask that ordinary information lasts two to five years while true trade secrets remain protected for as long as they qualify.
If there is no clear term at all, the duration is left open, which usually cuts against you. An unstated term is not a short one.
Ask for: Ask to add an explicit term so the duration is not left to argument.
An NDA has two different clocks. The term of the agreement is how long the NDA is in force, the window during which you exchange information. The survival period is how long you must keep that information confidential after the agreement ends. They are often different, and the survival period is the one that binds you long-term.
Read both. An NDA can have a one-year term but a survival clause that keeps you quiet for ten. When people ask how long an NDA lasts, the survival clause is usually the real answer.
Match the term to the shelf life of the information. Fast-moving commercial information like pricing and plans loses value quickly, so one to three years is often enough. Technical or product information tends to stay sensitive longer, so three to five years is common. Genuine trade secrets, formulas, source code, and the like, are usually protected for as long as they remain secret.
Personal data is a separate matter: it is governed by privacy law regardless of what the NDA says, so do not rely on an NDA term to define how it is handled.
| Type of information | Typical term | Red flag |
|---|---|---|
| General business or commercial | 1 to 3 years | Indefinite or perpetual |
| Technical or product | 3 to 5 years | 10+ years for ordinary information |
| Genuine trade secrets | As long as it stays secret | A short fixed term that ends protection early |
| Personal data | Governed by privacy law | Treated as ordinary confidential information |
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For most business information, two to five years is typical. Genuine trade secrets can be protected for as long as they stay secret. An indefinite or perpetual term for ordinary information is a common red flag.
Some try to, and for ordinary business information that is a red flag and often hard to enforce. Only genuine trade secrets really justify a duty with no fixed end date.
It states how long your confidentiality obligations continue after the agreement itself ends. It is often longer than the agreement's term and is the clause that actually binds you long-term, so read it.
The agreement's term can end, but the duty to keep information confidential can survive longer under the survival clause. Check both dates, not just the headline term.
Yes. ClauseShift does not keep the document you upload, only the report is saved to your account, and it trains no AI of its own on your contracts.
Last reviewed July 15, 2026. ClauseShift Review provides informational risk summaries and is not a substitute for legal advice.