You pull the lease for an unrelated reason — a sub-letting query, a break clause check, a routine renewal question — and notice a date that has already passed. "Rent review date: 25 March 2025." It is now May 2026. No new rent has been agreed. No memorandum has been signed. The standing order to your landlord still pays what you agreed when you took the lease years ago.

The first reaction is panic. The second should be to stop and read this.

[INTERNAL LINK: For the full framework of how commercial rent reviews operate, see our guide to rent review in commercial leases — PILLAR 1.]

A missed rent review date is almost never fatal. The default rule under English law is that a rent review can proceed despite the lapse of time — and the reviewed rent, once set, is backdated to the original date. Whether the landlord missed their trigger deadline or you missed a response deadline, the review does not simply disappear. The question is whether your lease falls into one of the narrow exceptions to that default rule.

This article explains how the rule works, when it does not apply, and what to do this week — before you speak to your landlord or their managing agent.

Why a Missed Rent Review Date Rarely Kills the Review

The leading authority is United Scientific Holdings Ltd v Burnley Borough Council [1978] AC 904, a House of Lords decision that resolved a contested area of law and has stood for nearly five decades. The House of Lords held that, in the absence of clear contrary wording in the lease, time is not of the essence in a commercial rent review clause. A landlord who misses a procedural deadline — the trigger notice, the counter-notice window, the arbitration appointment date — does not automatically lose the right to review. The review proceeds late. The new rent, once agreed or determined, takes effect from the original review date.

Two foundations support the rule. The first is doctrinal: English equity has long treated procedural time limits in contracts as directory rather than mandatory unless the parties clearly stipulate otherwise, a principle the House of Lords applied directly to rent review machinery. The second is commercial: rent review clauses exist to keep rent in line with market value across the term of a long lease. Treating a missed procedural date as automatically destroying that right would frustrate the bargain both parties made at the outset.

That rule is a presumption. It can be displaced. The rest of this article sets out exactly when.

The Four Situations Where the Default Rule Does Not Apply

1. The Lease Expressly Says So

The most direct exception: the lease tells you outright.

Read the rent review clause for phrases such as "time shall be of the essence," "the landlord's right to review shall lapse if not exercised by [date]," or "the rent shall continue at the passing rate if notice has not been served within [period]." That last formulation is called a deeming or consequence clause, and it is the one most tenants miss.

In Starmark Enterprises Ltd v CPL Distribution Ltd [2001] EWCA Civ 1252, the Court of Appeal confirmed that a clause specifying a deemed consequence for failing to act within a time limit — for instance, that the tenant is treated as having accepted the rent in the landlord's notice if no counter-notice is served — rebuts the United Scientific presumption and makes time of the essence by implication. You do not need the words "time is of the essence" if the consequence is stated clearly enough.

By contrast, a clause that merely sets a deadline without specifying a consequence — "the landlord shall serve notice within six months of the review date" — does not displace the default. A bare procedural timetable is the paradigm case of machinery, not time-critical obligation.

Pre-1977 leases are more likely to contain express time-of-the-essence wording. The United Scientific decision overturned then-prevailing Court of Appeal authority that had presumed time was essential, so leases drafted before 1977 sometimes addressed the question explicitly. Post-1977 institutional leases progressively moved in the opposite direction; modern leases now often state expressly that time is not of the essence in the rent review clause. Read your clause word by word before assuming either way.

2. Your Lease Also Has a Break Clause Nearby

This exception matters most to tenants and gets the least attention in standard commentary. [INTERNAL LINK: For a full treatment of break clause mechanics and how to exercise them correctly, see our guide to break clauses in commercial leases.]

Where the rent review clause and a tenant break clause are commercially interlinked — typically because the tenant needs to know the reviewed rent before deciding whether to exercise the break — the courts will often hold that time is of the essence in the review by implication. The logic is direct: a break clause is commercially worthless if the tenant must decide whether to exercise it without knowing the new rent.

The principle was established in C Richards & Son Ltd v Karenita Ltd (1971) 221 EG 25, approved by Lord Diplock in United Scientific, and developed by the Court of Appeal in Al Saloom v Shirley James Travel Service Ltd (1981) 42 P&CR 181. The Court of Appeal refined it further in Metrolands Investments Ltd v JH Dewhurst Ltd [1986] 3 All ER 659, reaching the opposite result on the facts. That last case matters: the interrelationship principle does not apply automatically just because both a review clause and a break clause exist in the same lease. The commercial link must be real. A break clause falling six years after the review date, with no express conditioning of the break on the reviewed rent, is unlikely to make the review time-critical.

For tenants, this is the most commercially valuable point in the article. If your lease contains a break clause that falls within months of a missed review date — and your landlord let the review drift — you may have leverage the landlord would rather you had not found. Equally, if you missed the response window in a lease with an interrelated break, the landlord's position may be stronger than the United Scientific default suggests. Read the break clause alongside the rent review clause before you do anything else.

3. Either Party Can Make Time of the Essence After the Fact

Even where the lease is silent, the party who has been waiting for the other to act can manufacture time pressure by serving a formal notice.

The mechanism was endorsed by Lord Diplock in United Scientific and confirmed by the Court of Appeal in Barclays Bank plc v Savile Estates Ltd [2002] EWCA Civ 589: where a reasonable time has passed without action, the waiting party can serve written notice requiring the other to act within a further reasonable period, failing which the right to review may be lost. What is reasonable depends on the circumstances — the complexity of the review, the conduct of the parties, and the time elapsed. No English court has fixed a numerical range. In practice, a period of several months is the typical starting point.

For tenants in a falling market, this mechanism is a tactical option. If the passing rent exceeds current market levels and the landlord is sitting on an unimplemented review, a properly-worded notice can force the landlord to act or lose the right. The notice must be drafted carefully: too short a deadline may render it ineffective, and imprecise wording may fail to engage the mechanism at all. This is not a task to handle without specialist input.

4. Conduct, Estoppel or Waiver (Almost Never Successful)

In theory, a party may be estopped from implementing a late review by their prior conduct. In practice, the courts set the bar very high.

Amherst v James Walker (Goldsmith & Silversmith) Ltd [1983] Ch 305 established the test: the party resisting the review must show a clear, unambiguous representation by the other party that the review would not be operated, and must show detrimental reliance on that representation. Mere delay is insufficient. Continued acceptance of rent at the passing rate is insufficient. Silence is insufficient.

Bello v Idealview Ltd [2009] EWHC 2808 (QB) shows how far this goes. The court allowed a landlord to implement a rent review despite a 13-year gap between the review date and the trigger notice. The tenant had paid and the landlord had accepted passing rent throughout. The estoppel argument failed.

If your landlord has given you an explicit written assurance that no review will be sought, take specialist advice on estoppel immediately. Without that, do not build your position on waiver as a primary line of defence.

The Backdating Trap — Why the Landlord's Delay Is Not Free

When a late rent review is implemented, the revised rent is backdated to the original review date. The tenant pays the difference between the old rent and the new rent for every month of the delay, plus interest.

In cash terms, the exposure scales quickly. A £60,000 annual increase backdated over two years amounts to £120,000 before interest. Modern institutional leases typically charge interest on arrears at 4% above Bank of England base rate. Arrears-of-rent claims are subject to a six-year limitation period under section 19 of the Limitation Act 1980 — running not from the review date but from the date the reviewed rent is actually agreed or determined. That point, confirmed in Bello v Idealview, means the limitation clock on a stale review does not start until the review is triggered. A landlord who waited 13 years before acting was still within time.

When you discover a missed review, model the backdated exposure before anything else. A lump-sum balancing payment of this size affects working capital materially, and it is a negotiating variable. Landlords sometimes waive or reduce backdated interest in exchange for prompt settlement of the revised rent; that concession carries real value, so name it in any negotiation. [INTERNAL LINK: For the tactics used to reach settlement on a disputed rent review — including without-prejudice offers — see our guide to Calderbank offers in rent review disputes.]

Where the building is opted to tax for VAT purposes, the balancing payment attracts VAT at 20%. Tenants making fully taxable supplies can reclaim it as input tax, but the cash-flow timing bites. Tenants making partly exempt supplies — insurers, banks, certain financial services and healthcare occupiers — bear it as an outright cost.

What to Do This Week

The worst response to a missed rent review date is to do nothing. The second-worst is to contact the landlord informally before you understand your position.

If you are a tenant who has just discovered a review date has passed, in this order:

• Locate the lease and read the rent review clause word by word. Do not skim it.
• Look for express time-of-the-essence wording and for any deeming or consequence clause (Starmark).
• Read every break clause and assess its commercial relationship with the review date.
• Note whether any written correspondence from the landlord or managing agent has ever implied the review would not be pursued.
• Do not call the managing agent. Do not send an informal email. Anything you say at this stage can affect a waiver or estoppel argument — yours or the landlord's.
• Take specialist property litigation and surveying advice before any communication goes out.
• Run the market analysis in parallel: what would the reviewed rent be at current market levels? [INTERNAL LINK: See our regional office rent benchmarks for comparable evidence in your market.] Whether you want this review to proceed depends on the answer.

A Note on New Leases in 2026

Tenants negotiating new leases should be aware that the English Devolution and Community Empowerment Act 2026 (Royal Assent 29 April 2026) prohibits upward-only rent review clauses in commercial leases. The ban applies to new leases granted after commencement of the relevant provisions and captures open-market upward-only reviews, certain index-linked mechanisms with a floor at the passing rent, and some renewal scenarios involving leases signed from 17 March 2026. Existing leases are not directly rewritten.

This change does not affect the operation of United Scientific or the time-of-the-essence analysis, which applies to any commercial rent review clause regardless of the review mechanism. It is, however, directly relevant to tenants approaching renewal or negotiating a new term: rent can now fall as well as rise at review, which changes both the economics and the tactics of any disputed review negotiation.

When You Actually Want the Review to Happen

The United Scientific rule cuts both ways, and tenants should not assume a missed review automatically works against them.

Most existing UK office leases are upward-only: at review, rent rises to market value but cannot fall below the passing rent. In a falling market an upward-only review produces no change — the passing rent continues regardless. Two situations alter that logic and make early resolution worth pursuing.

Index-linked reviews with a floor. Some leases link review to CPI or RPI with a minimum annual uplift — say, 1% — regardless of what the index does. In a deflationary period the index falls below the floor; the rent still rises by the collar amount. A tenant who understands this mechanism may prefer to resolve the review promptly rather than let the backdated liability on even a small annual increase compound over several years.

Open-market reviews with no upward-only cap. These appear occasionally in industrial leases and some regional secondary office stock. Where the reviewed rent would genuinely fall below passing, the tenant has every reason to trigger the review or to serve a notice making time of the essence to force the landlord to act before market rents recover.

From 2026, the English Devolution and Community Empowerment Act 2026 (Royal Assent 29 April 2026) makes this calculation more common. The Act prohibits upward-only rent review clauses in new commercial leases granted after commencement of the relevant provisions, meaning open-market downward-capable reviews are now the standard for new terms and renewals. For tenants negotiating a lease renewal, a landlord who lets a review drift post-commencement may be handing the tenant the very outcome the landlord wanted to avoid.

Which party benefits from a missed review depends on the market direction, the review mechanism, and the upward-only or downward-capable wording. Read the clause before you assume.

Frequently Asked Questions

What happens if a landlord misses a rent review date?
The right to review is not automatically lost. Under United Scientific Holdings Ltd v Burnley Borough Council [1978] AC 904, time is not of the essence in commercial rent review clauses by default. The landlord can usually implement the review late, with the new rent backdated to the original review date.

Is time of the essence in a commercial rent review clause?
No, unless the lease expressly says so, contains a deeming or consequence clause (see Starmark Enterprises v CPL Distribution [2001] EWCA Civ 1252), or the review clause is commercially interlinked with a tenant break clause.

Can a landlord backdate rent after a missed review?
Yes. The reviewed rent normally takes effect from the original review date, with a balancing payment covering the full delay period plus interest — typically 4% above Bank of England base rate under modern leases.

What is the limitation period for a backdated rent claim?
Six years from the date the reviewed rent is agreed or determined, under section 19 of the Limitation Act 1980. The clock runs from determination, not from the review date.

Can the tenant make time of the essence after a landlord delay?
Yes. Where a reasonable period has passed without action, a tenant can serve formal written notice requiring the landlord to act within a further reasonable period, failing which the right to review may be lost: Barclays Bank v Savile Estates [2002] EWCA Civ 589.

Does a break clause make time of the essence in a rent review?
Where the break and review are commercially interlinked — typically where the tenant's break decision depends on knowing the reviewed rent — the courts often find time of the essence by implication: Al Saloom v Shirley James Travel Service Ltd (1981) 42 P&CR 181.

Does accepting rent at the old rate count as waiver?
No. Mere acceptance of rent at the passing rate, even over many years, is not waiver of the right to review: Bello v Idealview Ltd [2009] EWHC 2808 (QB).

Is interest payable on backdated rent?
Usually yes. Modern institutional leases typically specify 4% above Bank of England base rate. Where the lease is silent, the arbitrator or court has wide discretion on rate and whether interest is simple or compound.

Are there other procedural deadlines in commercial leases that work the same way?
No — and that distinction matters. Lease renewal under the Landlord and Tenant Act 1954 operates on entirely different, strictly time-bound rules where missing a deadline can be fatal to the right to renew. [INTERNAL LINK: See our guide to the 1954 Act renewal process and its procedural timetable.]

A missed rent review date is the kind of moment that feels catastrophic and often turns out to be manageable — and occasionally, for a tenant who reads the clause carefully, turns out to be unexpected leverage. The law is settled, the rule is in your favour more often than not, and the outcome depends almost entirely on how your specific lease is worded and how quickly you understand what it says. Read the clause. Model the backdated exposure. If you want a surveyor who has run this analysis before and knows which side of the table to sit on, [Level's rent review service is the next step].

This article provides general information about English commercial property law as at May 2026. It does not constitute legal advice on any specific lease or situation. Before taking any action on a rent review dispute, seek specialist legal and surveying advice.

Sources

Legislation
- Landlord and Tenant Act 1954, Part II — the statutory renewal framework within which procedural deadlines operate (legislation.gov.uk).
- Limitation Act 1980, Section 19 — six-year limitation period for recovery of arrears of rent, running from the date the reviewed rent is agreed or determined.

Case law
- United Scientific Holdings Ltd v Burnley Borough Council [1978] AC 904 (HL) — the foundational House of Lords authority establishing that time is not of the essence in commercial rent review clauses by default, absent clear contrary wording.
- Starmark Enterprises Ltd v CPL Distribution Ltd [2001] EWCA Civ 1252 — Court of Appeal; a deeming or consequence clause in the rent review mechanism rebuts the United Scientific presumption and makes time of the essence by implication.
- Al Saloom v Shirley James Travel Service Ltd (1981) 42 P&CR 181 — break clause and rent review commercially interlinked; time of the essence implied where the tenant's break decision depended on knowing the reviewed rent.
- Barclays Bank plc v Savile Estates Ltd [2002] EWCA Civ 589 — the time-is-of-the-essence notice mechanism: where a reasonable period has elapsed without action, the waiting party may serve written notice requiring the other to act within a further reasonable period, failing which the right to review may be lost.
- Bello v Idealview Ltd [2009] EWHC 2808 (QB) — landlord permitted to implement a rent review 13 years after the review date; acceptance of passing rent over that period did not constitute waiver or estoppel.