How Long Do Non Disclosure Agreements Last? What to Know

Most Non-Disclosure Agreements (NDAs) (Cornell Law LII) last between 1 and 5 years. Short-term business negotiations typically use 1–2 year NDAs, since the information becomes outdated quickly. Agreements covering trade secrets, confidential formulas, or proprietary technology may run 5–10 years or longer - or even indefinitely, though courts can invalidate perpetual NDAs if the protected information becomes public. The right duration depends on four factors: (1) how long the information remains sensitive, (2) industry norms (tech NDAs are shorter; pharma NDAs are longer), (3) the nature of the relationship (project-based vs long-term), and (4) applicable law in your jurisdiction. After an NDA expires, obligations don't automatically end - survival clauses and trade secret law may maintain some confidentiality duties.

Knowing how long an NDA lasts is as crucial as signing one. If it's too brief, your information may be exposed too early. If it's too lengthy, it may not even be enforceable. Let's dissect how NDA lengths operate and how you can design yours for optimal protection. 

Some NDAs expire after a few months, some after a few years, and some appear to have no end in sight. 

It all depends on the nature of the information, industry norms, and what the parties mutually agree upon. 

Getting it right can be the difference between good protection and an expensive legal battle. 

So, what is the perfect length? Let's take a look. 

Key Takeaways 

• NDAs may last from months to years, based on industry requirements and business purposes. 

• Jurisdiction, information type, and relationship between parties impact NDA term. 

• Although NDAs may be open-ended, enforceability is an issue for long-term NDAs. 

• Renewals and extensions can be designed strategically with flexibility. 

• After an NDA has expired, some confidentiality obligations still remain. 

• Utilizing Microsoft 365 for managing contracts ensures compliance and monitoring. 

• Negotiating strategy must bring NDA duration in sync with business and legal goals. 

What is the standard duration of a Non-Disclosure Agreement? 

So, for how long do Non-Disclosure Agreements (NDAs) actually last? 

The answer: it depends. 

The response isn't so simple as you'd imagine since NDAs do not have a standard duration period. 

Their tenure is based on the nature of information being shielded, business practice, and what both signatories consent to in the agreement. 

In most business environments, NDAs are written to be effective for one to five years. 

If an agreement is intended to cover information regarding a short-term partnership, negotiation, or project, then an NDA for one to three years will suffice. 

This is typical of business negotiations in which information becomes outdated with time. 

But in case the NDA involves extremely confidential data like trade secrets, confidential processes, or intellectual property, then the contract could be for four or five years or more. 

But what about NDAs without an expiration date? 

Some contracts are drafted to run forever, so that the receiving party must keep the information confidential for life. 

That's more typical with trade secrets or confidential financial information that would never be in the best interest of a business to disclose. 

That being said, courts do not always uphold lifetime NDAs, particularly if the information being protected ultimately becomes public or has diminished value. 

The best practice? Make the NDA's term reasonable for the information at stake. 

What factors affect the duration of an NDA?

There are some factors that decide the appropriate time period, and getting it wrong would either involve revealing sensitive information prematurely or binding parties in an excessively long contract. 

There is no universal correct NDA duration - the right term is the one that balances adequate protection against the risk of the NDA being challenged as unreasonably long. Courts in some jurisdictions will not enforce NDAs they deem overly restrictive in duration, especially in employment contexts. The following five factors should guide the duration negotiation:

1. The Nature of Information Protected

All confidential information does not depreciate in the same period of time. 

Certain details such as future marketing initiatives or business collaborations become outdated in a few years. 

Trade secrets, confidential formulas, or client databases may have to be protected for far longer periods of time, perhaps forever. 

The more valuable and durable the information, the longer the NDA should be. 

2. Industry Standards and Norms

In technology and software, where things change rapidly, NDAs tend to be for one to three years because tomorrow's breakthrough concept may become obsolete in a matter of moments. 

In pharmaceuticals or manufacturing, where research and product development can take decades, NDAs can be for 10 years or more to safeguard long-term investments. 

3. Type of Business Relationship

The character of the relationship comes into play when it comes to determining the length of time that an NDA will last. 

If an NDA is attached to a short-term undertaking, like speaking in terms of the possibility of joint collaboration, then a one- to two-year contract would suffice. 

However, if it's a long-term relationship, like a joint enterprise or a supplier agreement, the NDA could last as long as the relationship and sometimes longer. 

4. Legal and Regulatory Requirements

Certain industries have rigid confidentiality rules that specify the duration of NDAs. 

Banks that deal with customers' information may be subject to privacy legislation mandating retention and confidentiality periods. 

If an NDA is incompatible with legal requirements, it may not be enforceable in court. 

5. The Risk of Disclosure

Lastly, take the risk factor into account. If the confidential information would result in severe financial or reputational harm if disclosed, a longer NDA is typically warranted. 

But if the risk diminishes with time, a shorter agreement may be more reasonable. 

In the end, the ideal NDA period is the one that weighs protection against reasonableness, enough to ensure information safety but not so extended as to become unenforceable or unreasonable. 

Can an NDA be indefinite?

A question that individuals often ask is: Is a Non-Disclosure Agreement (NDA) perpetual? In short, the answer is yes, but with a caveat. 

Theoretically, an NDA may be perpetual such that there's no end date. 

This happens in the context of safeguarding trade secrets, secret formulas, or confidential business plans that must remain secret permanently. 

But here's the truth: courts do not always approve of NDAs that are for an indefinite period. 

Judges will find them to be unreasonable or unjust, particularly if they unduly burden one party. 

Most jurisdictions would prefer NDAs to have a specific and reasonable time limit, say five, ten, or twenty years. 

Even where an NDA is open-ended, there are some limits.  

Where the confidential information falls into the public domain, is leaked by some other source, or is no longer useful, the NDA may not be enforceable in court. 

That's why most agreements contain provisions terminating confidentiality obligations when the information loses its confidentiality or usefulness. 

How do you renew or extend an NDA?

What if an NDA is nearing its expiration date but the requirement for confidentiality persists? That's where renewal and extension provisions are applied. 

Some NDAs have inherent renewal provisions, i.e., they renew automatically unless either party decides to terminate them. 

Others involve signing a new agreement or an amendment by both parties to maintain confidentiality for an extended period. 

Renewing an NDA is particularly beneficial in the case of long-term business deals where confidential data keeps getting shared. 

If the NDA term lapses mid-project, confidential information may end up leaking out. 

A wise thing to do is to check NDAs before they expire. 

If you still require protection, negotiate an extension with the other side. 

And rather than just replicating the terms of the previous agreement, think about revising the agreement to reflect any new business realities. 

Keeping an NDA valid when it needs to be is equally crucial to having one at all. 

The last thing you want is for sensitive business information to fall outside the law due to the paperwork not being completed on schedule. 

Before renewing an NDA, review and update:

• Has the scope of shared confidential information changed since the original agreement?
• Are the definitions of "confidential information" still accurate and comprehensive?
• Has either party's legal entity changed (acquisition, restructuring)?
• Do jurisdiction-specific laws (e.g., state trade secret law, employment regulations) require any updates?
• Is the permitted disclosure list (employees, advisors, subsidiaries) still correct?
• Should the renewal term be shorter, longer, or the same as the original?

What happens after an NDA expires?

So, what is the situation when an NDA actually expires? 

Do confidentiality measures necessarily go out the window? Not quite. 

Most NDAs have post-expiration obligations, which stipulate that the parties still must keep some information confidential for a specified amount of time after the agreement has expired. 

Even in the absence of a specific clause, ethical and professional responsibility still come into play. 

If a person shares confidential information that they agreed to protect, they can be subject to legal penalties, particularly if the revelation has cost implications. 

NDAs will often also make demands for return or destruction of documents containing the secrets after termination. 

If you have given proprietary data to your business partner, you don't need to see your files remain in their computers indefinitely. 

Even without a survival clause, the disclosure of information that qualifies as a trade secret continues to be protected under federal and state trade secret law (in the US, primarily the Defend Trade Secrets Act of 2016 and the Uniform Trade Secrets Act adopted by most states) regardless of whether an NDA has expired. This means that even if your NDA ran out two years ago, a former contractor who discloses your proprietary customer list or manufacturing process may still face legal liability. However, relying on trade secret law without an NDA creates higher evidentiary burdens - it is always better to have an active agreement in place.

How can you manage NDAs efficiently?

Dealing with NDAs manually, scrolling through email threads, keeping expiration dates in a spreadsheet, and searching for the most recent version can be a hassle. 

That's where Microsoft 365 can come to your rescue. 

SharePoint lets you keep all your NDAs in a secure, centralized repository. 

No more frantic searching to find a contract at the last minute. And with version control, you're always using the latest document. 

Power Automate can create workflows that automatically send NDAs for signatures, reminders to renew, and notices for expiration dates. 

To electronically sign NDAs, Microsoft Teams and Outlook integrations with e-signature software (such as Adobe Sign or DocuSign) enable you to send, sign, and store agreements in a seamless manner. 

For organizations managing more than a handful of NDAs, manual tracking in spreadsheets or email quickly becomes unreliable. Manual tracking leaves organizations exposed: when NDA expiry dates are managed in spreadsheets or email threads, it is common for renewals to be missed entirely - particularly across large portfolios where many agreements were signed years apart.

Final Thoughts 

NDAs are important for safeguarding confidential business information, but their effectiveness is determined by how well they're drafted, administered, and enforced. 

Knowing how long non-disclosure agreements last, what factors affect their duration, and if they can be indefinite allows businesses to make informed decisions. 

From establishing firm timelines to negotiating the terms of renewal, the balance lies in getting it just right, long enough to be protective but not so long as to become unenforceable. 

With capabilities such as automated workflows, versioning, electronic signatures, and AI-based contract tracking, Dock 365 simplifies the management of NDA. 

Want to experience how Dock 365 can make it easier to manage NDAs for your organization? 

Get a free demo today and manage your contracts like never before! 

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