Commercial Rent Increase Letter Template for England and Wales

A Commercial Rent Increase Letter is a formal notice landlords use to inform commercial tenants of upcoming rent increases in England and Wales. This document must comply with both statutory requirements under commercial tenancy law and the specific terms set out in your lease agreement. The letter serves as official documentation of the increase and establishes the legal timeline for implementation.

What is a notice of rent increase on a commercial lease?

A notice of rent increase on a commercial lease is the written communication a landlord sends to a tenant to confirm that rent will rise, on what date, and on what basis. It is triggered by the rent review clause in the lease, not by the landlord's preference alone. A valid notice states the current rent, the new rent amount, the effective date, and the lease clause that permits the change, and it is served using the method the lease requires.

When do you need this document?

You need a Commercial Rent Increase Letter when your commercial lease includes rent review clauses that allow for periodic increases, typically every three to five years. This document is essential when market rents have risen above the current rent level, when you need to adjust rent in line with inflation indices specified in the lease, or when fixed rent increase periods in the original lease agreement have been reached. The letter is also used when implementing increases following lease renewals or when exercising upward-only rent review clauses common in commercial leases. If your next review falls in 2026, drafting the notice early gives both parties time to agree figures before the effective date.

What does the rent review clause decide?

The rent review clause is the part of the lease that governs the increase. It sets the review dates, the review method, and the notice period you must give. Common methods include an open market rent review, where the rent is reset to what a comparable property would command; an index-linked review tied to RPI or CPI; and a fixed percentage uplift agreed at the outset. The clause also states whether reviews are upward-only. Read this clause carefully before you draft the notice, because a notice that goes beyond what the clause permits can be challenged. For related property documents, see our lease agreement templates.

How the rent review process works

A typical commercial rent review runs through a set order of steps, and knowing the sequence helps you serve a clean notice.

1. Check the rent review clause for the review date, method, and notice period.
2. Gather any valuation or comparable evidence the open market review requires.
3. Draft the notice, stating the current rent, the new rent, the effective date, and the clause relied on.
4. Serve the notice on the tenant by the method the lease specifies (registered post, personal service, or email where the lease permits it).
5. Allow time for the tenant to respond, negotiate, or refer a disputed figure to an independent surveyor.
6. Record the agreed rent and effective date in writing once both parties confirm.

How much notice do you have to give?

The notice period is set by the lease, and it is typically between three and six months before the increase takes effect. Serve the notice in writing and deliver it by the method the lease specifies, whether registered post, personal service, or another approved route. Give yourself enough time to include any valuation or comparable evidence the open market review requires, and to agree figures with the tenant where the lease allows negotiation. Keep a dated copy of the notice and proof of service on file, along with the tenant's contact details and any email confirmation, so the timeline is easy to evidence later.

Key legal considerations

The rent increase must be justified under the rent review provisions in your lease, and you cannot increase rent beyond what those terms permit. The letter must clearly state the legal basis for the increase, reference the relevant lease clause, and specify the new rent amount and effective date. If the lease requires professional valuation, ensure any proposed increase reflects current market conditions and comparable property values. Check whether the lease is contracted out of the Landlord and Tenant Act 1954, as this affects the tenant's renewal rights and how a review interacts with them. Where you hold tenant contact information, handle it in line with your data protection and privacy obligations under UK GDPR.

Legal requirements in England and Wales

Under the Landlord and Tenant Act 1954 and supporting legislation, commercial rent increase notices must meet strict procedural requirements. The notice must be served in writing and delivered according to the service methods in your lease, whether by registered post, personal service, or other approved methods. The increase must comply with the rent review mechanism in the lease, including open market rent assessments or index-linked increases. The Law of Property Act 1925 requires that notices affecting leasehold interests be properly documented and served. If a tenant disputes the increase, the lease may allow the matter to be referred to an independent surveyor, so your notice needs to be well-documented from the outset.

Where can I get help drafting the letter?

GenieAI drafts a ready-to-send notice from your lease terms, applies the correct rent review clause and notice period, and flags anything in the wording that could be challenged before you send it. You can review the draft, adjust the figures, and serve it directly. If you want to see how the wider tenancy fits together, browse our contract template library.