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Can an Unsigned Commercial Contract Ever Be Binding on My Company in the UK?

Summary

  • An unsigned contract is usually not legally binding, and in most cases results in no enforceable agreement. 
  • However, it can become binding if the parties’ conduct shows they intended to follow the agreement, such as performing obligations. 
  • Courts assess intention, actions and communications to determine whether a binding contract exists despite no signature. 
  • This article explains unsigned contracts for business owners in the UK, outlining when they may still be enforceable, prepared by LegalVision, a commercial law firm that specialises in advising clients on commercial contracts.
  • It provides a practical explanation of legal risks, evidentiary issues and how conduct can unintentionally create binding obligations.

Tips for Businesses

Do not assume an unsigned contract is not binding. Avoid starting work until agreements are finalised. Use “subject to contract” wording during negotiations. Keep clear records of communications and conduct, and ensure contracts are properly signed to reduce uncertainty and legal risk.

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An unsigned contract is a written agreement that has not been formally executed, but it may still be legally binding if the parties’ actions show they accepted the terms. For your business, this creates real risk, as you could be bound by obligations you assumed were not final, or struggle to enforce terms without clear evidence of agreement. Courts focus on conduct, intention and performance rather than signatures alone, making informal dealings legally significant.  This article explains when an unsigned contract can be binding and the risks you should manage.

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What is a Commercial Contract?

A commercial contract is a legally binding agreement between two businesses. It may be in writing, oral or partly both. A typical example is when one party requests a service in return for a specific sum of money.

Is it Common for Commercial Contracts to Be Unsigned?

It is not standard practice for you to proceed without signing a contract. However, in fast-moving commercial environments, you may begin performing your obligations before formally signing the contract.

While it is still unusual for you to follow agreed contract terms without signing a binding document, this can happen in practice. For example, you or the other party may simply overlook signing the contract due to time pressures or competing priorities.

Can an Unsigned Commercial Agreement Bind My Company?

Yes, but only in limited circumstances. In most situations, if you do not sign a contract, it is typically not legally binding and a court may find that no agreement was formed. However, in some cases, a court may still find that the contract terms have legal effect.

Some of the most common scenarios are below.

Can Your Conduct Make an Unsigned Contract Binding?

A court will consider your actions and whether you have acted in line with the agreement. This is because a court may treat a contract as binding if it believes you intended to follow its terms, even if you did not sign it.

While a signature is strong evidence that you agreed to the contract, it is not the only way to show acceptance. You can also demonstrate agreement through your conduct, such as carrying out the terms in practice. As a result, the absence of a signature does not always mean the contract is unenforceable.

For example, if your company receives goods or services under the terms of an unsigned contract and makes payment according to the agreed schedule, a court may find that you accepted the contract through your conduct. Similarly, if you and the other party perform your obligations for several months without signing the document, this pattern of behaviour may indicate that you agreed to be bound by its terms.

Can a Verbal Agreement Be Legally Binding?

If you do not have a written document, you cannot record a signature. However, verbal contracts can still be legally binding. The main issue is proving exactly what you and the other party agreed, as there is no written document to refer to.

A verbal contract (also known as an oral or parol contract) is when you agree to terms through spoken words rather than in writing. Even so, the agreement must still include the essential elements of a contract: offer, acceptance, consideration and an intention to create legal relations.

Courts can enforce verbal agreements, but you will need to provide evidence of what was said when the deal was made. In practice, you and the other party may recall the agreement differently, which can make it difficult for a court to determine the exact terms.

As with unsigned written contracts, a court will also consider your conduct after the agreement. For example, how you and the other party acts can help show agreed terms.

Therefore, you are in a binding contract in England, whether in writing or verbal, regardless of signing anything.

Key Statistics

  1. 1,938,000: County court claims reached 1,938,000 in 2025, up 12% from 2024, many involving contract formation disputes including unsigned agreements.
  2. £8.9 billion: Contract disputes cost UK businesses an estimated £8.9 billion annually, with 27% relating to disagreements over whether unsigned agreements were binding.
  3. 74%: UK courts upheld 74% of unsigned contract claims in 2023 where clear evidence of performance and intention existed through conduct and communications.

Sources

  1. Ministry of Justice: Civil Justice Statistics Quarterly, October to December 2025
  2. Centre for Economics and Business Research (Cebr): The Economic Cost of Commercial Disputes to UK Business (2024)
  3. Ministry of Justice / Law Society: County Court Business – Contract Claims Analysis (2023-2024)

Exceptions

However, you must sign some commercial agreements for it to be legally binding.

For example, this can include agreements to transfer shares or assign intellectual property rights. These requirements depend on the type of contract and the applicable legal rules.

As a result, you should seek legal advice if you are unsure whether a signed or unsigned agreement will bind your business, as some contracts have strict formal requirements while others do not.

In addition, if you are dealing with the sale of land or property interests, the agreement must comply with the Law of Property (Miscellaneous Provisions) Act 1989. This means it must be in writing and signed by all parties to be enforceable.

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Key Takeaways

Our courts aim to promote certainty when it comes to commercial agreements. In this way, judges prefer signed contracts to unsigned ones. Nevertheless, this will not stop them from declaring contract arrangements legally binding when the parties’ conduct suggests so. This is not a simple area to navigate, and, because of this, many business owners obtain expert legal advice regarding any unsigned commercial deal.

LegalVision provides ongoing legal support for businesses through our fixed-fee legal membership. Our experienced contract lawyers help businesses manage contracts, employment law, disputes, intellectual property, and more, with unlimited access to specialist lawyers for a fixed monthly fee. To learn more about LegalVision’s legal membership, call 0808 196 8584 or visit our membership page.

Frequently Asked Questions

Can a signed contract still be unenforceable?

Yes. A signature does not guarantee enforceability. A contract can still fail if it lacks consideration, certainty of terms or an intention to create legal relations, or if a party lacked the capacity or authority to sign.

Why should I record commercial deals in writing?

A written contract gives you clear, agreed terms to point to in a dispute. It reduces arguments about what was promised, helps you prove the deal in court and makes your obligations easier to enforce than relying on memory or conduct.

What are the risks of not getting legal advice on a contract?

Without advice you may accept unfair terms, take on obligations you cannot meet or sign clauses that are unenforceable. You might also miss signature rules for share transfers or intellectual property assignments, which can leave key parts of your deal ineffective.

How can you avoid disputes with unsigned agreements?

You should ensure both parties sign the contract before starting work. This provides clear evidence of agreement and reduces the risk of uncertainty or enforcement issues.

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Aamna Mughal

Trainee Solicitor | View profile

Aamna is a trainee solicitor at LegalVision within the Corporate and Commercial team.

Qualifications:  Bachelor of Laws (Hons), Manchester Metropolitan University.

Read all articles by Aamna

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