When people search for the difference between an NDA and a confidentiality agreement, they are usually trying to answer one of two questions: are they legally different instruments, or does one name carry a different meaning in their specific sector or context? The answer to the first question is straightforward: legally, they are the same. The answer to the second requires understanding how the terminology is used across different UK business situations — because while the documents are the same, the naming conventions vary by sector, relationship type and document structure.
NDASafe is a document preparation service, not a law firm. Our templates are legally reviewed against applicable UK law at the point of release, but every situation is different. Where significant value, unusual risk or a cross-border element is involved, take independent legal advice before you sign.
The legal answer: NDA and confidentiality agreement are the same thing
Under English law, a non-disclosure agreement (NDA) and a confidentiality agreement are not two different legal instruments — they are the same contract under two different names. Both create a legally binding obligation on the receiving party not to disclose or misuse specified confidential information. Both are enforceable where the confidential information is clearly defined, the obligations are reasonable, and the agreement is supported by consideration.
UK courts do not apply a different legal test to documents labelled ‘NDA’ versus documents labelled ‘confidentiality agreement’. The enforceability, the interpretation of the clauses, and the remedies available for breach are identical. The label is a convention, not a legal category.
The same principle applies to a confidential disclosure agreement (CDA) — widely used in the life sciences and pharmaceutical sector — and to confidentiality undertakings used in financial services and regulated contexts. All of these are the same type of legal instrument under different names.
Where the terminology differs in UK practice
Although the documents are legally identical, the terminology used varies consistently across sectors and relationship types:
- M&A and corporate finance: ‘NDA’ is the standard term for the confidentiality document used in business sale, acquisition and due diligence processes. An M&A NDA signed before a data room is opened would almost always be called an NDA, not a confidentiality agreement.
- Employment: An employee confidentiality obligation is typically called a ‘confidentiality clause’ when embedded in an employment contract, or an ‘employee confidentiality agreement’ when drafted as a standalone document. The term NDA is less commonly used in employment contexts in the UK, though the document is legally identical.
- Life sciences and pharma: The term ‘CDA’ (confidential disclosure agreement) is standard for pre-commercial and research disclosure agreements in the pharmaceutical, biotech and medical device sectors. UK research institutions and pharma companies routinely use CDA templates that are identical in legal effect to an NDA.
- Commercial property and real estate: The term ‘confidentiality agreement’ is more common in commercial property transactions, and the Investment Property Forum publishes a standard-form confidentiality agreement used in commercial property sales. An NDA would be equally valid.
- Financial services: Regulated financial services firms often use ‘confidentiality undertaking’ or ‘confidentiality agreement’ rather than NDA in their standard documentation, though the legal effect is the same.
- Technology and software: ‘NDA’ is the dominant term in technology partnerships, software development and commercial tech relationships. A tech company asking a partner to sign before a demo would almost always call the document an NDA.
Standalone NDA versus embedded confidentiality clause
The more practically significant distinction in UK business practice is not between an NDA and a confidentiality agreement — which are legally the same — but between a standalone confidentiality document and a confidentiality clause embedded in a broader contract.
A standalone NDA or confidentiality agreement is a self-contained document executed before or alongside a commercial relationship. It is the right tool when sharing information is the immediate need — before a formal contract is in place, before a pitch or presentation, or at the start of a due diligence process. A standalone document signals that the parties have specifically agreed on confidentiality obligations for a particular disclosure.
An embedded confidentiality clause sits within a broader commercial contract — a services agreement, employment contract, partnership deed, franchise agreement or supplier agreement. It governs confidentiality as one element of a wider documented relationship. An embedded clause is appropriate when a full commercial contract is being signed and confidentiality is one of many obligations being agreed.
A standalone NDA or confidentiality agreement is generally preferable for pre-contract disclosures, because it creates a binding obligation from the first conversation without requiring a full commercial contract to be in place.
Under English law, contracts can be formed verbally, and an implied duty of confidence can arise from the circumstances of a disclosure. However, verbal confidentiality obligations are difficult to prove and enforce. If confidential information is shared with the expectation of confidence, a signed written NDA or confidentiality agreement is the reliable legal protection — not a verbal agreement or a general expectation that the other party will keep the information private.
What actually determines enforceability
Whether a document is called an NDA or a confidentiality agreement, its enforceability under English law depends on the same factors:
The definition of confidential information must be clear enough that the receiving party knows what they are obliged to protect. A definition that is too vague or too broad — ‘all information of any kind’ — may be challenged; a definition with specific categories backed by a catch-all is more robust.
The duration must be reasonable relative to how long the information remains sensitive. Courts will not enforce an indefinite blanket obligation over ordinary commercial information. A fixed term for general business information with indefinite protection for defined trade secrets is the enforceable approach.
The carve-outs must be present: publicly available information, information independently known to the recipient, and information required to be disclosed by law or regulation must be excluded from the confidentiality obligation. Missing carve-outs can make a confidentiality agreement unenforceable.
The permitted purpose must be specified: the receiving party should only be permitted to use the information for the agreed purpose. An NDA or confidentiality agreement with an absent or unlimited permitted purpose is weaker than one that ties the obligation to a specific commercial purpose.
NDASafe's templates work whether you call the document an NDA or a confidentiality agreement. The Mutual NDA covers situations where both parties share information; the One-Way NDA (disclosing party) covers situations where only you are sharing. Available with England and Wales, Scotland or Northern Ireland as the governing law. £29 each or £79 for all eight NDA variants — editable Word documents delivered instantly.