Commercial Lease Clauses And Risks: What To Check Before You Sign In The UK

If you’re about to take on premises for your business, you’ve probably realised a legal lease isn’t just “renting a unit”. It’s a long-term commercial commitment that can shape your costs, your day-to-day operations, and even your exit plan.

And because leases are usually drafted to protect the landlord first, it’s on you to check the detail and negotiate what you can before you sign.

This guide walks you through what a legal lease typically covers, the clauses SMEs should pay closest attention to, the hidden risks we see trip businesses up, and a practical checklist you can use before committing.

What Is A “Legal Lease” (And Why Does It Matter For SMEs)?

In plain terms, a legal lease is a binding contract that gives you the right to occupy premises for a fixed term (or sometimes periodically), in return for rent and other obligations. In commercial property, those “other obligations” can be significant - and that’s where many small businesses get caught out.

A commercial legal lease will typically set out:

• The term (how long you’re committed for)
• Rent (how much you pay, when, and how it can increase)
• Your repair and maintenance responsibilities
• Service charge (especially in multi-let buildings)
• Insurance obligations
• Permitted use (what you can do in the premises)
• How you can exit (break clauses, assignment, subletting)

For SMEs, the “legal” part matters because once you’re in, your leverage is usually gone. If the lease is too restrictive, too expensive, or too risky, the impact can be immediate (cashflow pressure) or long-term (being locked into an unprofitable location).

If you’re unsure whether what you’ve been offered is actually a lease or something else, it’s worth checking early. Sometimes a Licence to Occupy is more flexible - but it usually gives you less security, so the right option depends on your priorities.

The Key Clauses To Check In A Legal Lease

Not all commercial leases are the same, but there are a few clauses we’d strongly suggest you read carefully (and ask questions about) every time. These are often the difference between a workable lease and a painful one.

1) Term, Break Clauses And Renewal Rights

Term is how long you’re tied in. A 3–5 year term might feel standard, but for a newer business it can be a big risk if your revenue is still unpredictable.

A break clause is your potential “get-out” route. If there is a break clause, check:

• When you can break (e.g. at year 2 only, or multiple break dates)
• How much notice you must give (e.g. 3 or 6 months)
• Conditions (common ones include “no arrears”, “vacant possession”, compliance with covenants)

Be especially careful with break conditions - they can be drafted so strictly that missing a small detail could make the break ineffective.

Also ask whether the lease is protected by the Landlord and Tenant Act 1954 (security of tenure). Some leases are “contracted out”, meaning you may have no automatic right to renew at the end. That can be fine if you want flexibility, but risky if location is central to your brand or footfall.

2) Rent, Rent Reviews And VAT

Rent is rarely just “£X per month”. In your legal lease, look for:

• Payment frequency (monthly vs quarterly in advance)
• Rent review provisions (upwards-only reviews are common)
• Index-linked increases (e.g. CPI/RPI)
• Whether VAT applies (some landlords opt to tax)

From a budgeting perspective, you want to model not just your starting rent, but how it could change over the term.

3) Repairing Obligations (This Is Often The Biggest Risk)

Repairing obligations can be one of the most expensive parts of a legal lease - especially in a full repairing and insuring (FRI) lease.

In an FRI lease, you may be responsible for keeping the premises in repair (sometimes even putting it into repair), which can include:

• Structure and exterior (depending on the lease and whether it’s a whole building)
• Roofs, walls, foundations
• Mechanical and electrical systems
• Windows, doors, drains and pipes

This is why a schedule of condition (photos and a written record of the property’s condition at the start) can be so important. It can help limit what you’re expected to hand back at the end.

4) Service Charge And Building Management

If you’re leasing a unit in a building (retail parade, office block, industrial estate), you may need to pay a service charge for shared costs like cleaning, security, common repairs and management fees.

What to check:

• What items are included (and excluded)
• Whether there is a cap (and if not, how costs are controlled)
• How and when the landlord accounts for spend
• Whether major works could be passed on to you

5) Permitted Use, Alterations And Fit-Out

Your legal lease should match what you actually intend to do in the premises. A “permitted use” clause can restrict your activities more than you might expect - for example, limiting you to a specific type of retail, or prohibiting cooking, music, late opening hours, or classes/events.

Alterations are another big one for SMEs because most businesses want to fit-out the space. Check:

• Whether you can make non-structural alterations without consent
• Whether the landlord can reasonably withhold consent (or has absolute discretion)
• Whether you must reinstate at the end (and at whose cost)

If your brand relies on signage, layout, ventilation, extraction, or specialist equipment, make sure the lease allows it before you commit.

6) Assignment, Subletting And Sharing Occupation

Many SMEs plan to grow, pivot, or restructure. Your legal lease should reflect that reality.

Look at the “alienation” clauses (assignment/subletting). These control whether you can:

• Assign the lease to a buyer if you sell the business
• Sublet if you need to downsize or share space
• Share occupation with a group company or concession partner

It’s common for landlords to require conditions, like an authorised guarantee agreement (AGA) or financial checks on the incoming tenant. The key is knowing your options and how “exit-friendly” the lease really is.

Common Legal Lease Risks SMEs Often Miss

Even when the rent looks affordable and the premises seem perfect, a legal lease can hide risks that don’t show up until later - often when cashflow is tight or you’re trying to exit.

Personal Guarantees And Security

Landlords commonly ask SME directors to sign personal guarantees (especially for new companies). That can mean if the company can’t pay, you personally may be pursued for the obligations.

You may also be asked for:

• A rent deposit
• A deed of guarantee and indemnity
• Advance rent payments

Deposits can be negotiable in size, duration, and release conditions. It’s worth understanding how deposits are usually handled and documented, including the practical rules around a lease deposit and when (and how) you’ll get it back.

“Forfeiture” And Default Clauses

Most legal leases give the landlord rights to take action if you breach the lease - for example, non-payment of rent or unauthorised alterations.

Even if you never intend to breach, it’s worth checking:

• What counts as a breach
• What notice (if any) must be given
• What remedies you have (and how quickly you must act)

Repair “Dilapidations” At The End Of The Lease

“Dilapidations” is the term for end-of-lease repair claims. This is one of the most common commercial property disputes we see because it can result in a large bill just as you’re trying to move or close a site.

Practical risk management steps include:

• Agreeing a schedule of condition
• Clarifying repair responsibilities (especially for structure/common parts)
• Keeping maintenance records throughout the term

Business Rates, Utilities And Hidden Costs

Your lease might make you responsible for business rates, utilities, water, refuse, or estate charges. These are not “legal tricks” - they’re common - but they can change your true occupancy cost significantly.

It’s smart to build a simple “total occupancy cost” forecast that includes:

• Rent
• VAT (if applicable)
• Service charge
• Insurance rent (if charged)
• Business rates
• Utilities and waste
• Fit-out and reinstatement costs

Note: Tax and rates rules (including VAT and business rates) can be complex and fact-specific. The points above are general information only and aren’t tax advice - you should confirm the position for your business with your accountant or adviser.

What To Check Before You Sign: A Practical Legal Lease Checklist

Signing a legal lease is one of those moments where a short delay to check things properly can save you months (or years) of headaches.

Here’s a practical checklist you can work through before you commit.

1) Confirm The Heads Of Terms Match The Lease

Many deals start with “heads of terms” (commercial points agreed in principle). Make sure the final lease reflects what you think you agreed - including incentives like rent-free periods or contributions to fit-out.

2) Check Title, Boundaries And Rights

Make sure you understand:

• What area you’re actually leasing (especially with storage, parking, bin areas)
• Any rights of way or access restrictions
• Whether you have rights to use common areas (and any opening hour rules)

3) Get Clarity On Repair And Condition

If there’s no schedule of condition and your obligations are broad, you may be walking into an open-ended liability.

At a minimum, consider:

• A professional survey (depending on the premises and term)
• Agreeing a schedule of condition
• Clarifying responsibility for major structural items

4) Review Insurance Requirements

Commercial leases often require the landlord to insure the building and recharge you (or require you to insure directly for certain risks). Either way, check:

• What risks are covered
• Whether you must pay an insurance rent
• Whether you must hold additional policies (public liability, contents, business interruption)

5) Confirm The Lease Works With Your Business Model

This is where SMEs should be especially careful. Ask yourself:

• Does the permitted use allow what we actually do today?
• Does it allow reasonable pivots (e.g. adding a studio space, takeaway element, small events)?
• Do we need landlord consent for signage, equipment, or layout changes?
• Could we share space or sublet if we needed to reduce costs?

6) Make Sure Execution Is Done Properly

Some leases and related documents need to be executed with particular formalities (especially if they’re deeds). If execution is handled incorrectly, it can create enforceability issues - which is the last thing you want for something as important as your premises.

Two practical areas that matter here are:

• Understanding signature requirements for companies and individuals
• Knowing who can witness a signature when witnessing is required

If your lease (or any related guarantee) is being signed as a deed, it’s worth checking the correct process for executing deeds so you don’t accidentally create delays at completion.

How To Negotiate A Legal Lease (And When To Get Legal Help)

Negotiation can feel awkward when you’re excited about a site - but it’s normal, and landlords expect it. The key is focusing on the clauses that have the biggest financial and operational impact.

Common negotiation points for SMEs include:

• Break clause (add one, shorten the term, or reduce conditions)
• Repair limitation (schedule of condition, narrower repairing covenant)
• Rent-free period (especially if you need time to fit-out)
• Service charge cap (or tighter rules on what’s recoverable)
• Alterations flexibility (clear consent process, signage rights)
• Assignment/subletting (reasonable consent, clearer criteria)
• Personal guarantee (limit duration, cap liability, or agree release conditions)

Even if the landlord won’t move on every point, small improvements can significantly reduce risk.

It’s also worth remembering: a lease is not just a “property document” - it’s a core part of your commercial risk profile. Having a lawyer review the lease can help you spot issues you may not be looking for, and propose amendments in a way that’s commercially sensible.

If you’re signing a lease for retail premises in particular, a Commercial Lease Review can be useful because retail leases often include additional operational restrictions (opening hours, signage rules, centre regulations, footfall clauses) that can affect how you trade day-to-day.

More broadly, if you want an expert set of eyes on the document before you commit, a Commercial Lease Review can help you understand what you’re signing, what you can negotiate, and where the major risks sit.

Key Takeaways

• A legal lease is a binding commercial contract that often includes significant obligations beyond rent, so it’s worth treating it as a major business decision (not admin).
• Pay close attention to term and break clauses, rent reviews, repairing obligations, service charge, permitted use, and assignment/subletting rights.
• Common SME risks include personal guarantees, expensive dilapidations claims at the end of the lease, and “hidden” occupancy costs like service charges, insurance rent, VAT and business rates.
• Before you sign, check that the lease matches the commercial deal, understand repair and condition, confirm your operational needs are permitted, and make sure the document is executed correctly.
• If you’re unsure, getting a legal review early can help you negotiate better terms and avoid being locked into liabilities you didn’t budget for.

This guide is general information for UK businesses. Commercial leasing rules can differ depending on where the premises are and the terms agreed (for example, some points above are based on the law in England and Wales). It isn’t legal advice, and you should get advice on your specific lease before signing.

If you would like help reviewing or negotiating a legal lease, you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.