Rent Review Notice: What UK Commercial Tenants and Landlords Should Know

If you run a small business from leased premises, your rent is usually one of your biggest overheads. So when a rent review notice arrives (or when you realise you should have served one), it can feel like the start of a stressful and expensive process.

The good news is that rent reviews are normally very “rule-based”. The lease will usually tell you when a rent review can happen, how it should be calculated, and what notices need to be served.

This guide explains what a rent review notice is, how the process typically works in the UK, and what practical steps you should take (whether you’re the landlord or the tenant) to protect your position.

What Is A Rent Review Notice?

A rent review notice is a formal notice served under the rent review clause in a commercial lease. It’s usually the document that kicks off (or attempts to kick off) the rent review process.

In plain English, it’s the landlord saying something like:

• “It’s the review date under the lease.”
• “We propose the new rent should be £X per year.”
• “Here’s how we’ve calculated it (for example, open market rent or an index-linked formula).”

Not every lease uses the same terminology. Depending on the drafting, you might see:

• a landlord’s notice proposing the new rent;
• a tenant’s counter-notice disputing the proposed rent;
• an application notice to an independent expert or arbitrator; or
• specific “trigger” notices where the review only happens if one party serves a notice on time.

The key point is this: rent reviews are contractual. That means they happen (or don’t happen) based on the words of your lease, not based on general assumptions about “fair rent”. If you’re unsure what your lease allows, it’s worth getting a Commercial Lease Review before you take action.

Is A Rent Review Notice Always Required?

No. Some leases state that the rent automatically changes on the review date (for example, it increases in line with RPI or CPI), with no notice required.

However, many commercial leases require a notice to be served to:

• start the review process;
• propose the new rent; and/or
• preserve the landlord’s right to increase rent.

If the lease requires a rent review notice and it isn’t served correctly (or on time), the consequences will depend on the lease wording. It may mean the review can’t be started for that period, that the review is delayed, or that a dispute arises about whether the notice was valid.

When Should A Rent Review Notice Be Served?

Timing is one of the biggest “make or break” issues with a rent review notice.

Commercial leases often contain:

• a review date (for example, every 3 or 5 years);
• a notice window (for example, not more than 12 months and not less than 3 months before the review date); and
• a longstop date (a deadline after which the landlord can’t start the review).

If you miss a contractual deadline, it can be difficult (and sometimes impossible) to fix after the fact. This is why it’s important to diarise review dates early and treat rent review notices as a priority, not “admin you’ll do later”.

Does The Landlord Have To Increase The Rent On The Review Date?

Not necessarily. A rent review clause might allow the rent to move:

• upwards only (very common in older leases);
• up or down (less common, but you do see it); or
• in line with an index (which can go up or down depending on drafting, but often is drafted to increase only).

This is also where small business tenants sometimes get caught out: even if local market rents have dropped, an “upward-only” rent review can still lock you into the previous high-water mark.

For a broader view on how rent changes can be structured, it can help to understand the different ways rent increases are handled in UK commercial leases.

What If The Landlord Serves The Notice Late?

It depends entirely on the lease wording. Common outcomes include:

• the landlord loses the right to review rent for that review period;
• the review still happens, but may be delayed; or
• the review happens and the rent is backdated to the review date once determined (meaning you could suddenly owe arrears).

Because the consequences can be significant, you’ll usually want tailored advice if you think a rent review notice was served out of time.

How Does A Rent Review Usually Work In A UK Commercial Lease?

While every lease is different, most rent review mechanisms fall into a few common categories.

1) Open Market Rent Reviews

This is the “classic” rent review. The rent is set based on what the premises could be let for on the open market at the review date, assuming certain conditions in the lease.

The lease will usually include assumptions and disregards, which can cover things like:

• the property is available to let on the open market;
• the tenant has complied with its obligations (even if it hasn’t);
• disregarding the tenant’s goodwill; and
• disregarding tenant’s improvements (sometimes).

Why this matters: small drafting differences can have a big impact on valuation. For example, whether tenant improvements are disregarded can change the “market rent” significantly.

2) Index-Linked Reviews (RPI/CPI)

Index-linked reviews usually adjust the rent by reference to an inflation index. They can be simpler and more predictable than open market reviews, but you still need to read the formula carefully (caps, collars, base months, and rounding rules all matter).

Some leases also provide for a “floor” so rent can’t decrease even if the index drops.

3) Fixed Or Stepped Increases

Some leases set out rent increases in advance (for example, £30,000 for years 1–3, then £35,000 for years 4–6). In that case, the “notice” may be more about administration than negotiation - but you still need to comply with any formalities in the lease.

4) Turnover Rent Or Hybrid Models

Retail and hospitality leases sometimes use turnover rent (rent linked to your revenue), often with a base rent plus a percentage of turnover. These models tend to be more document-heavy because they require:

• clear definitions of turnover;
• reporting and audit rights; and
• confidentiality and data handling provisions.

Because turnover models touch on sensitive business information, it’s worth ensuring your lease and supporting documents properly protect you from day one.

What Should A Rent Review Notice Include (And How Should It Be Served)?

Again, the lease is your rulebook. But rent review notices commonly need to include:

• the review date and which lease clause the notice relies on;
• the proposed reviewed rent (usually an annual figure);
• the basis of calculation (for example, open market rent);
• any supporting information required by the lease (sometimes it asks for a breakdown or valuation summary); and
• clear identification of the premises and the parties.

Service Requirements Are Often Strict

Most leases include a “Notices” clause setting out exactly how notices must be served, such as:

• the address for service (which may be different from the property address);
• permitted delivery methods (post, courier, and sometimes email or other electronic methods if the lease allows it);
• when service is deemed effective (for example, “two business days after posting”); and
• whether service by email is valid (and what email address must be used).

If you serve a rent review notice incorrectly, the other side may argue it’s invalid - which can derail the process or weaken your negotiating position.

Practical Tip: Don’t Mix Rent Review With Other Issues

If you’re in a wider dispute (repairs, service charge, dilapidations, deposit release), it can be tempting to bundle everything into one letter. That can backfire.

A rent review notice should usually be:

• clear, formal, and focused on the lease clause; and
• served exactly as the lease requires.

If you do need to escalate a separate dispute, a properly drafted Letter Before Action is often a better fit than trying to shoehorn complaints into the rent review notice itself.

What Should Tenants Do After Receiving A Rent Review Notice?

If you receive a rent review notice, the worst thing you can do is ignore it and hope it goes away.

Instead, take a structured approach.

Step 1: Check The Lease First (Not The Notice)

Start by pulling the signed lease and locate:

• the rent review clause (including the review dates);
• the notices clause (how notices must be served);
• any time limits for a counter-notice; and
• the dispute resolution process (expert determination, arbitration, etc.).

This is also a good moment to check any related documents that can affect the financial picture, such as your deposit terms. If you’re unsure where you stand, understanding your lease deposit position can be important when planning cashflow around rent changes.

Step 2: Diarise Deadlines And Decide Whether To Serve A Counter-Notice

Many leases require a tenant to serve a counter-notice within a specified time if they dispute the proposed rent. If you miss that deadline, the lease may limit your ability to dispute the landlord’s figure or move you into the next stage of the process (for example, expert determination) - so it’s important to check the clause carefully.

Even where the lease doesn’t set a clear consequence for “silence”, delay can still hurt you - because the landlord may push forward to formal determination, which costs time and money.

Step 3: Get Evidence (Comparable Rents And Valuation Input)

If the review is open market, negotiations usually revolve around evidence, such as:

• recent lettings of similar properties (size, location, condition);
• incentives (rent-free periods, fit-out contributions);
• length of term and break rights; and
• service charge levels and repair obligations.

Often, you’ll want a surveyor’s input here. A rent review can look like a “legal” issue, but it’s usually a blend of legal interpretation and valuation evidence.

Step 4: Watch For Backdated Rent And Interest

Some leases provide that once the reviewed rent is agreed or determined, it is payable from the review date - even if that date was months ago. This can lead to:

• arrears for the difference in rent; and
• interest on late payment (again, depending on the lease).

If your business is growing, these catch-up bills can be painful. It’s one reason tenants often try to resolve rent reviews sooner rather than later.

Step 5: Consider Your Wider Options

Sometimes a rent review is a trigger to review your broader premises strategy, for example:

• negotiating lease variations (term, break, repair);
• assigning the lease or subletting (if permitted); or
• relocating to a different site.

In some situations, businesses operate under a Licence To Occupy rather than a lease, which can mean a very different approach to rent changes and security of tenure. The right structure depends on your goals and your bargaining position.

Common Rent Review Notice Pitfalls (And How To Avoid Them)

Whether you’re a landlord trying to protect rental income or a tenant trying to keep premises costs under control, rent reviews can go wrong in predictable ways.

1) Using The Wrong Address Or Delivery Method

A notice can be “perfect” in content but still invalid if it isn’t served the way the lease requires.

Common mistakes include sending it to:

• the property address instead of the registered office;
• an old address that was updated later by agreement; or
• an email address or electronic method that isn’t permitted under the notices clause.

2) Missing The Notice Window

Landlords often diarise rent review dates, but not the notice windows. Tenants sometimes miss counter-notice deadlines because they assume “we can negotiate later”.

In practice, the safest approach is to diarise all rent review milestones and work backwards.

3) Assuming “Market Rent” Means “What I Think Is Fair”

Open market rent isn’t a vibe - it’s a valuation exercise based on evidence and the lease assumptions/disregards.

If you want to negotiate effectively, you need to understand:

• what the lease says the valuer must assume; and
• what evidence supports (or undermines) the proposed figure.

4) Not Accounting For Other Lease Costs

Rent is only one part of occupation costs. Service charge, insurance rent, repairs, and contributions to building works can affect affordability.

Similarly, if there are sums tied up in a commercial deposit arrangement, it can affect your negotiating leverage and your exit planning. Understanding the overall position on lease deposit provisions is often part of the bigger picture.

5) Escalating To Formal Determination Too Early (Or Too Late)

Most leases include a dispute resolution route if you can’t agree the rent, commonly:

• independent expert determination (often quicker and cheaper, but limited appeal routes); or
• arbitration (more formal, can be slower and more expensive).

The lease may also specify who appoints the expert/arbitrator and how costs are shared.

For small businesses, the commercial reality is that formal determination can be costly. But waiting too long can also be risky if rent becomes backdated with interest.

6) Treating The Lease Like A “Standard Contract”

Commercial leases are often heavily negotiated, and even small wording changes can shift risk and cost.

If you’re trying to interpret a tricky rent review clause (or challenge a notice), it helps to understand the underlying contract terms principles that apply - but you’ll still want advice that’s specific to your document.

Key Takeaways

• A rent review notice is usually the formal trigger (or key step) in changing rent under a commercial lease, and it must follow the lease wording closely.
• Rent reviews are contractual - the lease will set the timetable, the method of calculation (open market, index-linked, fixed increases), and the dispute process.
• Notice deadlines and service rules matter. A rent review notice can be disputed (or fail entirely) if it’s served late or served incorrectly.
• Tenants should respond by checking the lease, diarising counter-notice deadlines, gathering valuation evidence, and planning for potential backdated rent.
• Landlords should treat rent review notices as a compliance exercise: use the correct form, correct address, correct timing, and keep a clear paper trail.
• If a rent review becomes contentious, it’s often better to handle related disputes separately and escalate using the right process (including, where appropriate, a Letter Before Action).

If you’d like help reviewing your lease, drafting or responding to a rent review notice, or negotiating a lease variation that protects your business, you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.