TL;DR
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Most freelance NDAs should last 1 to 3 years after the project ends. Two years is the most common and generally enforceable duration for standard business information. Perpetual NDAs are only justified for genuine trade secrets like proprietary algorithms, formulas, or manufacturing processes.
Courts favor NDAs with clear time limits. An indefinite confidentiality obligation for routine business data may be ruled unreasonable, which ironically makes the entire NDA unenforceable and leaves the client with less protection than a reasonable time-limited agreement would have provided.
This guide covers standard NDA durations by project type and how to negotiate when a client's proposed timeline does not match the work.
Standard NDA Durations by Project Type
| Project Type | Recommended Duration | Why |
|---|---|---|
| Standard freelance project | 1-2 years | Business information loses relevance over time |
| Website or app development | 1-2 years | Code and design become public at launch |
| Brand and logo design | 6 months - 1 year | Branding is public once launched |
| Product photography | 3-6 months | Images become public when campaign runs |
| Product development (pre-launch) | 2-3 years | Product info stays sensitive until after launch |
| Consulting and strategy | 2-3 years | Strategic plans have a longer competitive shelf life |
| Trade secrets (algorithms, formulas) | 5-10 years or perpetual | Retain competitive value indefinitely |
| Financial data access | 2-3 years | Financial records have ongoing sensitivity |
pro tip
The duration should match how long the confidential information retains competitive value. A logo concept is worthless once the final logo is public. A proprietary algorithm retains value for years. Match the NDA duration to the information's lifespan, not a blanket number.
How NDA Duration Works
Start Date
NDA duration typically begins from one of two points:
- Date of signing: The NDA starts immediately and runs for the specified period regardless of when the project ends.
- Date of project completion or termination: The NDA starts when the working relationship ends. This is more common for freelance work because it protects information for a fixed period after the last disclosure.
The second option is better for freelancers because it ensures protection covers the actual period of risk. If a project runs for 6 months and the NDA is 2 years from signing, you only have 18 months of post-project protection. If it is 2 years from project completion, you have the full 2 years after the last confidential exchange.
Survival Clauses
Some NDAs include a "survival" clause stating that certain obligations continue beyond the NDA's expiry. This is common for trade secret provisions within an otherwise time-limited NDA.
Example: "This agreement expires 2 years after project completion. However, obligations regarding trade secrets (as defined in Section 3) shall survive indefinitely."
This hybrid approach is reasonable. It gives you a clear end date for most obligations while maintaining permanent protection for genuinely sensitive items.
When Perpetual NDAs Are Justified
Perpetual (indefinite) NDAs are appropriate only when the information retains competitive value permanently:
- Proprietary algorithms or formulas -- a search engine's ranking algorithm, a chemical formula, a financial model
- Source code for core products -- not the code you wrote for the client, but their existing proprietary codebase
- Customer databases with ongoing relationships -- only if the data cannot be obtained through public means
- Manufacturing processes -- methods that provide lasting competitive advantage
Perpetual NDAs are not justified for:
- General business plans (they change annually)
- Marketing strategies (they change quarterly)
- Client lists (people move, companies change)
- Project specifications for work that has shipped
- Any information that becomes public after launch
How to Negotiate Duration
When the Proposed Duration Is Too Long
Client proposes a 5-year NDA for a website redesign. The website will be public in 3 months. Five years of confidentiality for something the world can see makes no sense.
Your response:
"I noticed the NDA duration is 5 years. Since the website will be publicly visible after launch, would you be comfortable with a 1-year duration? This protects the confidential business data you shared during the project while reflecting that the deliverables themselves become public. I am happy to discuss which specific information you feel needs longer protection."
When the Proposed Duration Is Perpetual
Client sends an NDA with "in perpetuity" for a standard consulting engagement.
Your response:
"I would like to suggest a 2-year duration for the NDA, which is standard for consulting engagements. If there are specific trade secrets that require longer protection, we could add a survival clause for those items while keeping the general duration at 2 years."
For more negotiation strategies and red flags to watch for, see NDA red flags. For guidance on refusing unreasonable NDAs entirely, see when to refuse to sign an NDA.
What Happens When the NDA Expires
When the duration ends:
- Your legal obligation to maintain confidentiality ceases. You are no longer bound by the agreement.
- You may still owe return or destruction obligations. Some NDAs require you to delete or return confidential materials at expiry. Check the terms.
- Professional discretion still applies. Even after an NDA expires, sharing a former client's internal data is unprofessional and could damage your reputation.
- Portfolio rights may open up. If the NDA restricted portfolio use, expiry may allow you to show the work. Verify with the specific terms.
| After NDA Expires | Can You Do It? |
|---|---|
| Stop treating info as confidential | Legally yes, but use professional judgment |
| Show the project in your portfolio | Check if there was a separate portfolio restriction |
| Discuss the project publicly | Yes, but avoid sharing specifics that could harm the client |
| Work with the client's competitors | Yes (unless a separate non-compete exists) |
| Delete your copies of confidential files | Check the return/destruction clause |
NDA Duration Checklist
Create Your NDA With the Right Duration
FreelanceDesk includes free NDA templates where you can set the duration, define survival clauses, and customize all terms. Use the NDA generator to create a professional PDF in minutes.
References
- Freelancermap. "Non-Disclosure Agreement for Freelancers." freelancermap.com, 2026.
- EveryNDA. "NDA Duration and Expiry." everynda.com, 2026.
- Ironclad. "Non-Disclosure Agreements: Everything You Need to Know." ironcladapp.com, 2026.
- DealHub. "What is Quote Expiration?" dealhub.io, 2026.
- MoldStud. "Freelancer NDA Negotiation Survey." moldstud.com, 2025.