Published 21 August 2026 by Prop-Pocket Team
Navigate the rent review process effectively with this step-by-step guide for landlords, ensuring timely and successful lease negotiations.
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A rent review resets the rent payable under a commercial lease to a new figure, agreed by a fixed method and date written into the lease itself. If a review date is approaching, you need to act now, not once the deadline is on top of you.
Start with three things this week:
Get these right early and most reviews settle by agreement, without ever reaching a surveyor's desk or a formal determination.
A successful rent review depends on reading the lease clause early, serving notices correctly, and backing your position with strong comparable evidence.
| Point | Details |
| --- | --- |
| Read the clause first | Confirm the mechanism, review date, and any assumptions or disregards before doing anything else. |
| Calendar every notice deadline | Typical response windows run 28 to 60 days, and missing one can forfeit your review rights. |
| Build a comparables file | Collect at least three genuine comparable lettings before opening negotiations. |
| Know your dispute routes | Independent expert determination is usually faster than arbitration for straightforward valuation disputes. |
| Use Prop-Pocket to manage admin | Its rent increase calculator, document storage, and reminders help track deadlines and evidence alongside professional advice. |
Every lease sets out its own method for recalculating rent, and the mechanism chosen shapes how much work you'll need to do. Four types dominate commercial leases in the UK.
Diagram comparing four rent review mechanisms
Open-market review asks what a hypothetical willing tenant would pay for the property on the review date, based on comparable lettings nearby. This is the most common approach and the one most exposed to market swings, up or down.
Indexation ties rent to RPI or CPI, applied mechanically rather than negotiated. It sounds tidy, but index-linked reviews can create real cashflow shocks during high inflation unless the lease includes caps and collars or some form of smoothing. Model a few inflation scenarios before you agree to this structure in a new lease.
Fixed uplifts give certainty for both sides but can drift badly out of step with the real market by the third or fourth review.
Turnover rent links payment to the tenant's sales, common in retail. It brings breakpoints and audit rights into play, and you'll need contractual access to sales reporting to make it enforceable in practice.
Open-market valuation, indexation, fixed increases and turnover-based assessments remain the four standard mechanisms landlords encounter, and open-market reviews are still treated as the benchmark for reflecting genuine market conditions.
Procedural failure kills more rent reviews than weak evidence ever does. The lease dictates the timetable, and time is usually of the essence, meaning a missed deadline can forfeit your right to a review entirely or lock you into last year's rent.
Pro Tip: Serve every notice through two channels where the lease allows it, and file the delivery receipts in one folder. If a tenant later disputes service, that receipt is the entire argument.
Comparables are the currency of every rent review negotiation, and most reviews settle through negotiation precisely because one side's comparables convince the other before things escalate. You want at least three genuinely comparable lettings: similar size, location, lease length and condition, agreed as close to the review date as possible. Local agents, Estates Gazette data and recent Land Registry filings are the usual sources.
Hands sorting rental comparables on desk
Assumptions and disregards decide what evidence is even admissible. A clause might assume vacant possession or a permitted use, while disregarding the tenant's own improvements or any goodwill they've built up. These clauses are frequently the point that decides the whole valuation, more than the raw comparables themselves.
If your evidence base looks thin, or the clause is ambiguous, instruct a chartered surveyor. Preparation should start six to twelve months before the review date for straightforward cases, giving your surveyor time to build a defensible case. Before serving notice, assemble:
A credible opening figure, backed by real comparables rather than a round number plucked from hope, sets the tone for everything that follows.
Pro Tip: Put your opening figure and its supporting comparables in writing early. A written, evidenced position is harder for a tenant to dismiss than a verbal number floated in a phone call.
Tenants researching their own negotiating position often turn to guides like Hauzed's tenant negotiation advice, so expect a counter-argument built on comparable evidence rather than simple resistance.
When negotiation fails, the lease will usually point you towards one of two routes, and the choice affects both cost and how much control you keep over the outcome.
Independent expert determination hands the decision to a surveyor who investigates independently and reaches a binding conclusion using their own judgement, not strict rules of evidence. It's faster and cheaper than arbitration, and this is the route most leases prefer for straightforward valuation disagreements.
Arbitration under the Arbitration Act 1996 runs more like a court process, with formal evidence and limited grounds for appeal. It suits complex disputes where legal interpretation of the clause, not just valuation, is in question.
Where the lease names no specific third party, either side can apply to RICS for an appointment.
RICS appointment is commonly used where the lease fails to name a specific third party. It's a routine, established pathway, and often faster and cheaper than full arbitration.
Backdated rent following a determination usually carries interest from the review date, so factor that into any cashflow planning while the dispute runs its course.
Agreement or determination isn't the end of the paperwork. Close the review properly or you'll be arguing over the same figures again in five years.
Most disputes trace back to poor preparation rather than a genuine market disagreement. Misread clauses and thin comparables cause more escalation than any real dispute over value.
Watch for these recurring errors:
Pro Tip: A rent increase calculator and a document store won't replace a chartered surveyor, but they will stop you missing a notice date or losing a comparable in an inbox. Use digital tools to protect the deadlines; use professional advice to win the argument.
The moment a review date is six months out, read the clause again, in full, and put every deadline in the calendar. Pull three solid comparables, and if they're thin, get a surveyor involved early rather than after the notice has gone out. Serve and expect notices exactly the way the lease specifies, and keep proof. Sign the memorandum even when the rent doesn't move.
Hands arranging rent review checklist and calendar
Chartered surveyors and solicitors handle the valuation and legal argument, but the admin around a rent review, tracking dates, storing evidence, calculating scenarios, is where landlords lose time and sometimes lose the review itself through a missed deadline.
Prop-Pocket's rent increase calculator lets you model indexation and stepped uplifts before you sit down with a surveyor, so you walk into that conversation with numbers already worked through. The platform's document storage keeps your lease, comparables and correspondence in one searchable place, which matters when a dispute drags on and you need proof of service from eighteen months ago. Reminders flag notice deadlines automatically, and the finance overview gives you a live picture of arrears and interest once a new rent is backdated. Your first property is managed free, with no card required, so you can set up your review calendar and evidence store before the next deadline lands. Visit Prop-Pocket's features page to see the full toolset, or head to Prop-Pocket to start your free account today.
What triggers a rent review?
The lease itself sets the trigger, usually a fixed date or anniversary, and often requires one party to serve a formal notice starting the review clock.
Who pays for the surveyor during a rent review?
This varies by lease. Some require each party to pay their own surveyor, others split a jointly instructed expert's fee, so check the clause before assuming the cost falls on you.
Can a landlord backdate a rent increase after a review?
Yes, where the review process concludes after the original review date, the new rent typically applies from that date, with interest often payable on the arrears.
What is a rent review memorandum?
It's a short document recording the agreed or determined rent and its effective date, signed by both parties and attached to the lease for future reference.
How is a market rent review different from indexation?
A market rent review relies on comparable lettings and professional valuation, while indexation applies a fixed formula, such as RPI or CPI, without negotiation over value.
This article is general information, not a substitute for advice from a qualified lawyer. Consult a qualified legal professional about your own circumstances before acting on anything here.
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