Alex is Sprintlaw’s co-founder and principal lawyer. Alex previously worked at a top-tier firm as a lawyer specialising in technology and media contracts, and founded a digital agency which he sold in 2015.
You're negotiating a lease, business sale or supplier deal, and the other side has written subject to contract at the top of an email or set of heads of terms.
It can feel reassuring, but also a bit vague. Can you still walk away? Can they? And what happens if you've already agreed the price, start date and key terms?
The phrase is useful, but it's not magic. What matters is what you've agreed, what you've said in writing, and whether your conduct shows you meant to be bound before signing the formal contract.
What Does Subject To Contract Mean?
Subject to contract usually means the parties don't intend to be legally bound by the main deal until a formal contract is agreed and signed.
In UK business negotiations, you'll often see it on:
- heads of terms for a commercial lease
- letters of intent for buying or selling a business
- emails negotiating a supplier agreement or customer contract
- term sheets or heads of agreement for partnerships, investment or licensing deals
The practical idea is simple: you're still negotiating. You may have agreed the headline points, but you haven't yet committed to the final legal terms.
For example, you might agree a rent figure for a shop unit, but still need to sort out repair obligations, break rights, rent review wording, service charge caps, fit-out permissions and personal guarantees. Those details can seriously affect your business, even if the rent looks fine.
Using subject to contract can help show that you don't want a binding agreement until the full document is finalised. Courts in England and Wales look at this objectively. That means they ask what a reasonable person would think from your words and conduct, not just what you privately intended.
The phrase is especially common in property transactions because everyone usually expects a formal lease or contract to follow. But it's also helpful in ordinary commercial deals where you don't want an email chain to become the contract by accident.
Is Subject To Contract Binding?
Usually, the main deal isn't binding if it's clearly subject to contract, but some parts of the arrangement can still be binding.
This is the point that catches many businesses out. Subject to contract can protect you from being locked into the full deal, but it doesn't always stop every obligation from taking effect.
You may still be bound by separate terms such as:
- confidentiality: keeping financials, customer lists, pricing and business information private
- exclusivity: agreeing not to negotiate with anyone else for a set period under an exclusivity arrangement
- costs: agreeing who pays legal, survey, valuation or professional costs if the deal doesn't complete
- deposits: agreeing whether a holding deposit is refundable and when
- due diligence rules: setting out how documents can be used and who can access them
Those clauses are often marked as binding even though the rest of the heads of terms are not. That's fine if you understand the commitment. It's risky if you treat the whole document as non-binding and miss the carve-outs.
Say Priya is buying a small salon for GBP 85,000. The heads of terms say the sale is subject to contract, but the exclusivity clause says Priya has 30 days to complete due diligence and must pay the seller's reasonable legal costs up to GBP 1,500 if she pulls out without a genuine issue. If Priya walks away simply because she found a cheaper salon, she may not be bound to buy the business, but she could still owe the agreed costs.
Can An Email Be Subject To Contract?
Yes, an email can be subject to contract, but the wording needs to be clear and you need to behave consistently with it.
A subject to contract email is often enough to show that you're still negotiating, especially if it appears in the subject line and the body of the message. For example, a useful opening might say that all discussions are subject to contract, board approval and signature of a formal agreement.
The risk comes when the rest of the email sounds final. If you write that you accept all terms, confirm the start date, ask the other side to begin work and arrange payment, the subject to contract wording may not fully match what you're doing.
English contract law doesn't require every business contract to be signed in wet ink. A contract can arise through emails if there's offer, acceptance, consideration, intention to create legal relations and enough certainty in the terms. Electronic signatures can also be valid in many commercial contexts.
To reduce the risk of an email accidentally becoming the deal, keep your wording consistent:
- put Subject To Contract in the email subject line
- repeat it in the first paragraph
- say no party is bound until the final contract is signed
- avoid words like accepted, agreed or confirmed unless you mean it
- don't ask the other side to start performance unless you're ready to be bound
- state any separate binding obligations clearly
If your company needs internal approval, say so. For example, the agreement could be subject to director approval, finance approval or board approval before signature. This is particularly useful where the deal is material to your company or you need a formal Companies Act 2006 signing process later.
How Does Subject To Contract Work In A Commercial Lease?
In a commercial lease, subject to contract normally means you're not bound to take the premises until the lease or agreement for lease is completed.
This is very common when agents issue heads of terms. You might have agreed the proposed rent, term, deposit and rent-free period, but the lease still needs careful contract drafting, review and negotiation.
For a commercial tenant, the biggest risk is assuming the legal detail will match the deal summary. It often doesn't. Before you commit, check points such as:
- whether the lease is inside or outside the Landlord and Tenant Act 1954 security of tenure regime
- repair obligations, especially if the lease is full repairing and insuring
- service charge wording and whether there's a cap
- rent review method and dates
- break clause conditions and notice requirements
- permitted use, planning and licensing limits
- fit-out approval and reinstatement obligations
- personal guarantees and rent deposits
- assignment, subletting and sharing occupation
Commercial leases in England and Wales often need formal signing and completion. A lease for more than 3 years usually needs to be made by deed, and longer leases may also need Land Registry registration. Agreements for lease and contracts relating to land can have extra formalities under the Law of Property (Miscellaneous Provisions) Act 1989.
This doesn't mean you need to panic when you see lease heads of terms. It means you should treat them as a serious negotiation document. If the agent pressures you to sign heads of terms on the spot, it's reasonable to say you need time to review them and that they remain subject to contract.
Can You Still Walk Away Before Signing?
Often yes, if the deal is genuinely subject to contract and you haven't agreed separate binding terms or acted as if the contract has started.
The safer question isn't just whether you've signed. It's whether your words and conduct show a final agreement. In some cases, businesses become bound before a long-form contract is signed because they agree the essentials and start performing.
Think about these warning signs:
- you've sent an email saying all terms are agreed
- the other side has started work at your request
- you've paid an invoice or deposit without clear conditions
- you've taken possession of premises or started trading from them
- you've delivered goods or given access to systems
- the main terms are certain enough to operate without the final document
For example, Mike runs a cleaning business and negotiates a 12-month office cleaning contract worth GBP 2,000 per month. His email says subject to contract, but he then tells the client to start on Monday, sends cleaners for 6 weeks and invoices the client twice. If the client later says there was no contract because nothing was signed, Mike may have a strong argument that a contract existed from the parties' conduct.
If you want to walk away, pause before sending a blunt message. First, gather the email chain, heads of terms, draft contract, payment records and any messages about starting work. Check whether any clauses were expressly binding, such as confidentiality or costs. Then respond clearly, without admitting a binding agreement if that isn't your position.
If the deal is high-value or the other side is threatening to claim loss, get tailored advice before you reply. A few words in an email can make the dispute harder to resolve.
How Should You Use Subject To Contract In Negotiations?
You should use subject to contract early, consistently and alongside practical controls on what happens before signing.
The phrase works best when it appears before the deal feels final. Don't wait until the last email after you've already agreed everything and asked the other side to proceed.
A Practical Negotiation Checklist
- Use the wording from the first serious proposal: include it in emails, heads of terms and draft documents.
- State the condition clearly: say no binding contract will exist until the final agreement is signed by all parties.
- Separate binding and non-binding terms: list confidentiality, exclusivity, deposits or costs separately if they're meant to bind now.
- Control performance: don't start work, take possession, hand over assets or grant system access until the contract position is clear.
- Manage approvals: mention board, landlord, lender, shareholder or funder approval if needed.
- Keep payment conditions clear: label deposits as refundable or non-refundable and state when they can be kept.
- Get the draft reviewed before commitment: especially for leases, business sales, long supplier terms and personal guarantees.
A Simple Subject To Contract Outline
You can use this outline for an email or heads of terms, but it should be tailored by a lawyer before you rely on it for an important deal. Templates often miss the commercial details that matter most to your business.
- Heading: write Subject To Contract and, if relevant, Subject To Board Approval.
- Parties: name the correct legal entities, company numbers and trading names.
- Deal Summary: describe the proposed lease, sale, supply arrangement or service clearly.
- Non-Binding Statement: say the main deal won't bind anyone until the final contract is signed.
- Conditions: list due diligence, finance, landlord consent, shareholder approval or licence checks.
- Binding Terms: identify any confidentiality, exclusivity, costs, deposit or governing law clauses that bind now.
- No Performance Yet: state that no work, occupation, transfer or delivery should begin before signing unless separately agreed.
- Expiry Date: set a date when the proposal lapses if not signed.
- Next Steps: list who will provide the draft contract and when comments are due.
- Authority: confirm who can approve and sign for each company.
When Should You Get The Contract Reviewed?
You should get the contract reviewed before you sign, pay a non-refundable amount, start work, take premises or tell the other side the deal is agreed.
That's the moment when your leverage is highest. Once you've paid money, moved into premises, told staff about the deal or lined up suppliers, it's much harder to renegotiate.
A review is particularly worthwhile where:
- the contract runs for more than 12 months
- you can't terminate easily if the deal stops working
- the other side can change prices, scope or service levels
- you're giving a personal guarantee
- you're buying assets, goodwill, stock or customer contracts
- there are data protection obligations under the UK GDPR and Data Protection Act 2018
- you're licensing intellectual property, software or confidential know-how
- the contract could affect funding, growth plans or a future sale of your business
For a supplier deal, the review might focus on payment terms, liability caps, service levels, termination rights and ownership of IP. For a business sale, it may focus on warranties, employee transfer issues, restrictive covenants and completion mechanics. For a lease, it will often focus on rent review, repair, break rights and security of tenure.
You don't need every contract to become a huge legal project. The goal is to spot the terms that could create cost, delay or operational problems later, then fix them while you still can.
Key Takeaways
- Subject to contract usually means the main deal isn't binding until a formal contract is signed.
- Some terms can still bind you now, including confidentiality, exclusivity, costs and deposit clauses.
- An email can help protect you, but your wording and conduct need to line up.
- Commercial lease heads of terms should be treated seriously, especially around repair, break rights and 1954 Act protection.
- You may still create a contract by starting work, taking possession, paying money or acting as though the deal is final.
- Get the contract reviewed before you commit commercially, not after you've lost negotiating leverage.
If you'd like help with reviewing your heads of terms, negotiating your commercial lease or supplier agreement, or checking whether you can walk away before signing, you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.
Drafted by Taylor, Sprintlaw's AI, and overseen by Alex Solo. How we write
Control the transaction before completion
What should the buyer or seller line up next?
Deal structure, due diligence, liabilities, employee and contract transfers, approvals and completion mechanics need to work as one transaction.








