Section 13 Rent Increase: Form 4A Rules for England

A section 13 rent increase for an assured periodic tenancy in England requires Form 4A and at least 2 months' notice, even if the tenant agrees. Rent cannot increase in the tenancy's first year and can increase only once a year, according to the government rent-increase guidance.

This guide covers the reformed private-tenancy process in England. Social housing, regulated tenancies, assured agricultural occupancies and properties in Wales, Scotland or Northern Ireland need separate checking. Start with the tenancy type, not with a template retrieved from an old shared folder.

For a managing agency, the operational risk is a premature accounts instruction: the landlord approves a figure, someone changes the ledger, and the notice is treated as an administrative afterthought. Reverse that sequence. Validate the route, dates, evidence and service before scheduling any change to the rent demanded.

When can a section 13 rent increase take effect?

Check the tenancy start, previous increases and tenancy periods together. The current form's notes require the increase to begin at the start of a tenancy period. They also explain the annual timing rules; a generic reminder measured from the date a letter was sent does not establish the earliest lawful increase.

The government guide says an increase cannot take effect until at least a year after the last increase, including an increase made under the earlier notice process or a rent review clause. Retrieve the actual effective date, rather than assuming an old agreement's anniversary was the date the tenant began paying more.

The form notes explain that the first increase cannot start until 52 weeks after the tenancy began. Further increases are generally at least 52 weeks apart, but the annual-cycle rule can require 53 weeks. Have the proposed date checked against the notes, especially for weekly-paying tenancies, rather than treating “annual” as a spreadsheet shortcut.

Use the following suggested pre-instruction record:

• Identify the tenancy type and confirm the applicable legal process.

• Record the start date, rent frequency and current rent from the tenancy file.

• Find the most recent effective increase and its supporting notice or agreement.

• Propose a date that meets both the notice requirement and tenancy-period rules.

• Record who checked that date and where the evidence is stored.

Do not resolve a missing historic record by guessing. Ask the landlord, examine the ledger and correspondence, and refer uncertain cases for advice before serving anything.

How do you complete and serve Form 4A?

Download the current document from the official assured tenancy forms page, rather than adapting an older letter. The government says not to change prescribed wording unless the form permits it. Read the attached guidance alongside the fields; completing boxes is not the same as checking validity.

The current notice asks for tenant, property, landlord and applicable agent details, the current and proposed rent, tenancy dates, relevant previous increase information and signatures. Check joint-tenant names against the file. Have another person compare the completed notice with the evidence before it leaves the agency.

Allow at least 2 months between service and the proposed increase. The government guide permits notice in person, by post or by email where the tenancy agreement allows email. Do not assume the tenant's use of email for repair reports establishes an agreed legal service method.

The notice's service instructions say to use an agreed method specified in the written tenancy agreement; otherwise they describe personal delivery, leaving it at the tenant's address or registered post. Retain the completed version, service method and supporting evidence. Seek advice where the contract or delivery timing is uncertain instead of reducing the notice allowance to fit a preferred date.

Discussion can precede the notice, but agreement does not remove the requirement to follow the statutory process. The government guidance expressly says it is required every time, even after agreement. Keep a friendly explanatory message separate from the prescribed notice so the message is not mistaken for the legal document.

What happens to old notices and rent review clauses?

A valid Form 4 notice given before 1 May 2026 retains its stated notice period and increase, even where the increase begins afterwards. By contrast, an increase agreed through a rent review clause before 1 May 2026 but due to take effect afterwards does not apply. Both distinctions appear in the transitional guidance.

Split historic cases into the route used, date notice was given and date the increase took effect or was intended to take effect. Do not label all pending changes “pre-reform” and assume they survived. An accounts task inherited from an old workflow needs the same scrutiny as a newly requested review.

For ongoing covered tenancies, a rent review clause is not a substitute for the statutory increase procedure described in the government guide. Update the agency's instruction checklist so the presence of a clause does not bypass review. For the wider changes, use the letting agents' operating checklist.

How should you evidence open-market rent?

The relevant comparison is the rent expected on reletting the property on the open market, not simply the landlord's desired return. The government guide uses that definition when explaining the tenant's right to challenge an above-market proposal.

Build a compact evidence pack with genuinely comparable nearby properties. Record location, size, condition, features, furnishings and terms, alongside the evidence date and whether the rent was advertised or actually agreed. Explain differences rather than selecting only the most expensive listings.

HM Courts & Tribunals Service says actual agreed lettings provide stronger evidence than portal listings. Its application guidance also asks for property details, photographs, repairs and improvements, who provided them and local amenities. Keep disrepair or tenant-funded improvements visible to the person assessing the proposed rent.

A useful internal recommendation states the proposed figure, supporting evidence, limitations and approving person. Avoid language suggesting the market evidence guarantees the tribunal outcome. Retain the source documents so a colleague can understand the recommendation without relying on the original negotiator's memory.

What happens if the tenant challenges the increase?

The tenant must apply before the proposed new rent's start date, even if evidence is still being gathered. The tribunal application guidance explains how to challenge the rent and legal validity, including the paper route where only validity is disputed. An informal objection sent to the agent is not the same as a tribunal application.

The government's current reform announcement says tenants applying to the tribunal do not have to pay the higher rent until its final decision. Flag a notified challenge to accounts and obtain the actual case information before issuing messages asserting that the disputed increase is already overdue.

For the landlord's response, HMCTS provides Form MR2 and a 28-day response period, with copies to the tenant and tribunal. The guidance also explains when a determined rent normally starts. Read the decision and payment-date directions before updating the ledger; do not automatically backdate to the original proposal.

HMRC's Valuation Office is planned to take responsibility for initial rent determinations, but tenants must still apply to the tribunal while reforms are developed. That distinction is explicit in the government announcement. Do not redirect a current applicant to a future service.

How should an agency hand the review to accounts?

Use a controlled handover containing the checked notice, service evidence, effective date, approved amount and any challenge or subsequent agreement. Assign someone to reconcile the legal position with the rent schedule. Keep exceptions out of automated reminder workflows until a responsible person has checked them.

For message ownership and continuity, use the tenant communication guide. Aloft offers Maintenance AI, Lettings AI and Payments AI to support communications and property operations. Rent-setting, notice service and legal disputes remain decisions for the agency and its advisers, rather than an assumed automated workflow.

Change the rent schedule only when the supporting process can be demonstrated.

Frequently asked questions

Can a landlord increase rent if the tenant agrees?

Agreement does not bypass the statutory procedure for covered assured periodic tenancies in England. The government rent-increase guide says the process must be followed every time. Discuss the proposal, then complete the required notice and check its dates and service. Do not treat a tenant's conversational acceptance as permission to skip the formal steps.

Can a tenant challenge a rent increase?

Yes. A tenant who considers the proposal above the open-market rent can apply to the tribunal before the proposed start date. The application guidance also explains challenges to notice validity and the evidence needed. Keep correspondence accurate about the route and deadline, and refer requests for legal advice to an appropriate adviser rather than improvising an answer.

Does a rent review clause still work?

It is not a substitute for the current statutory increase process on covered tenancies. The government guidance also distinguishes historic notices from clause-based increases that were agreed before commencement but were due afterwards. Check the actual route and effective date before honouring an old accounts instruction; the existence of a clause alone does not validate it.