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letter of intent review checklist uk

Letter of Intent Review Checklist: What to Check Before You Sign

A letter of intent review checklist for UK businesses is something most founders wish they had before they signed. An LOI looks informal — it often is — but certain clauses can create binding obligations before any final deal is agreed. Exclusivity periods, confidentiality terms, and cost allocation provisions can all carry real legal weight under English law, even when the document says it is 'subject to contract'. This guide walks you through what to check before you sign: which clauses are typically binding, which are red flags, and when you genuinely need a solicitor rather than a checklist. Whether you are entering a commercial partnership, an acquisition, or a joint venture, the same core questions apply. Getting this right at the LOI stage saves significant time and money later. Atornee helps UK businesses review letters of intent quickly, flag the clauses that matter, and decide whether to escalate.

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Why this matters

Most founders treat a letter of intent as a handshake on paper. That is the problem. LOIs regularly contain binding exclusivity clauses that lock you out of other deals for weeks or months, confidentiality obligations that survive if the deal falls apart, and cost-sharing terms that nobody flagged at the time. By the time you realise what you agreed to, the leverage has shifted. The real pain here is not complexity — it is false confidence. The document looks simple, so people skip the review. This page exists to fix that habit before it costs you.

The Atornee approach

Atornee is not a law firm and does not replace one for high-stakes transactions. What it does is give UK founders a fast, structured way to review a letter of intent before deciding whether to escalate. You upload your LOI, Atornee identifies which clauses are likely binding under English law, flags exclusivity periods, confidentiality obligations, and unusual cost terms, and tells you plainly what to watch out for. That takes minutes, not days. If the review surfaces something serious, Atornee tells you to get a solicitor — and means it. No upselling, no vague reassurance.

What you get

A clause-by-clause breakdown of your LOI highlighting which provisions are likely legally binding under English law
Clear identification of exclusivity periods, their duration, and what they prevent you from doing during that window
Flagging of confidentiality obligations that survive deal collapse, including any that lack a defined end date
Plain-language summary of cost allocation and break fee terms so you know your exposure if the deal does not complete
An honest escalation prompt if the document contains terms that require qualified legal advice before you sign

Before you sign checklist

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1. Read the entire LOI before uploading — note any clause that uses the word 'binding', 'shall', or 'agrees to'
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2. Check whether the document contains an exclusivity or lock-out clause and record the exact duration and scope
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3. Identify any confidentiality or non-disclosure obligations and confirm whether they have a defined expiry date
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4. Look for any cost allocation or break fee provision that could make you liable if the deal falls through
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5. Confirm whether the LOI states it is 'subject to contract' — and understand that this does not automatically make every clause non-binding
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6. Upload the document to Atornee and review the flagged clauses against your commercial priorities
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7. If the LOI involves a significant acquisition, property transaction, or unusual governing law clause, escalate to a solicitor before signing

FAQ

Is a letter of intent legally binding in the UK?

It depends on the specific clauses. An LOI marked 'subject to contract' is generally not binding as a whole, but individual provisions — particularly exclusivity, confidentiality, and cost allocation clauses — can be binding regardless of that label. English courts look at the intention behind each clause, not just the document's overall heading. Do not assume the whole thing is non-binding without checking each clause individually.

What are the biggest red flags in a letter of intent?

The main ones to watch are: an exclusivity period with no clear end date or break right, confidentiality obligations with no expiry, a break fee or cost-sharing clause that is disproportionate to the deal size, governing law set outside England and Wales without a clear reason, and any clause that purports to create an obligation to negotiate in good faith — which is generally unenforceable under English law but can still cause disputes.

Do I need a solicitor to review a letter of intent?

Not always. For straightforward commercial LOIs with standard terms, a structured self-review using a checklist or an AI tool like Atornee is often sufficient to understand what you are agreeing to. You should involve a solicitor if the LOI relates to an acquisition, a significant property deal, involves unusual or onerous terms, or if the other party has legal representation. When in doubt, the cost of a short solicitor review is almost always less than the cost of a dispute later.

What is the difference between a letter of intent and a heads of terms?

In practice, the terms are often used interchangeably in the UK. Both set out the agreed commercial framework before a final contract is drafted. Heads of terms is more common in property and M&A transactions; letter of intent is more common in commercial partnerships and joint ventures. The legal analysis is the same — check which clauses are expressed as binding and which are not, regardless of what the document is called.

Can I negotiate a letter of intent after receiving it?

Yes, and you should if anything looks unreasonable. An LOI is a starting point for negotiation, not a take-it-or-leave-it document. Common negotiation points include shortening exclusivity periods, adding a mutual break right, capping any cost-sharing obligation, and ensuring confidentiality terms have a defined end date. Pushing back at the LOI stage is far easier than trying to renegotiate once a full contract is in draft.

What happens if I sign an LOI and the deal falls through?

If the LOI contained binding clauses — exclusivity, confidentiality, or cost allocation — those obligations survive the deal collapsing. You could be liable for costs incurred by the other party, restricted from pursuing alternative deals during any remaining exclusivity period, or bound by confidentiality obligations for however long the clause specifies. This is why reviewing those specific clauses before signing matters, not after.

Related Atornee Guides

Cheap Contract Solicitor Alternative (UK)

Useful if your LOI review surfaces issues that need broader contract workflow support.

Cheap Solicitor for NDA (UK)

Relevant when your LOI includes confidentiality obligations that need a standalone NDA alongside it.

Atornee Use Cases

See how UK founders and operators use Atornee across different document review scenarios.

External References

GOV.UK Business and Self-employed

Official UK guidance on business operations and commercial dealings.

UK Legislation

Primary statutory reference for English contract law, including the Contracts (Rights of Third Parties) Act 1999 and related legislation.

ICO Guidance for Organisations

Relevant where an LOI includes data sharing or confidentiality clauses that engage UK GDPR obligations.

Trust & Verification Policy

Authored By

A

Atornee Editorial Team

UK Contract Research

Reviewed By

C

Compliance Review Desk

UK Business Legal Content QA

Last reviewed on 3/4/2026

"This content is based on analysis of common letter of intent structures used in UK commercial transactions and the practical issues UK founders encounter when reviewing pre-contract documents. It reflects patterns identified across partnership, acquisition, and joint venture LOIs governed by English law."

References & Sources