Form 4A is live and here is what the guidance notes actually say

The introduction of Form 4A as the mandatory document for proposing rent increases under periodic assured tenancies in England has generated considerable discussion among landlords and letting agents. Since its implementation on 1 May 2026, questions have arisen regarding how to complete certain sections accurately, particularly Section 4, which addresses tenancy and rent increase history. Understanding the guidance notes accompanying the form is essential to ensure compliance with the Renters’ Rights Act 2025 and to avoid invalid notices that could delay rent adjustments.

Understanding Form 4A and Its Legal Context

Form 4A replaced the previous Form 4 from 1 May 2026 following the enactment of the Renters’ Rights Act 2025. This legislation invalidated all contractual rent review clauses for assured periodic tenancies, making the Section 13 process — which utilises Form 4A — the sole lawful method to increase rent. This applies even when landlords and tenants have informally agreed on a rent rise, emphasising the importance of following the prescribed procedure.

Landlords and agents should note that any rent increase notice served on a document other than Form 4A after this date is legally ineffective. An invalid notice does not oblige tenants to pay the proposed rent, and landlords must reissue a valid notice, restarting the notice period. This underscores the critical nature of correctly completing and serving Form 4A to maintain compliance and avoid disputes.

Clarifying Key Sections of Form 4A

Section 4 of Form 4A has been a focal point of confusion, especially questions 4.2, 4.3, 4.4, and 4.6. These fields require accurate historical tenancy and rent increase information, which can be challenging for landlords with long-standing tenants or incomplete records.

Question 4.2 asks for the tenancy start date. While the form lacks explicit guidance here, the prevailing interpretation among housing professionals is that this date should reflect when the tenancy originally commenced, not the date of the most recent agreement. Renewals or replacement agreements with the same tenant typically do not constitute a new tenancy for the purposes of rent increase notices. However, where there is uncertainty—such as when tenancy renewals might legally create new tenancies—landlords should consider seeking legal advice to confirm the correct date.

Question 4.3 requests the date of the most recent rent increase, if applicable. The guidance is straightforward: if no rent increase has occurred since the tenancy began, this field should be left blank. If there has been an increase, the date when the rent last changed should be entered, which may coincide with the start date of a new tenancy agreement if the rent was adjusted then. This date is significant because the law prohibits rent increases more frequently than once every 52 weeks, with the timing measured from the effective date of the previous increase.

Addressing the Complexities of Question 4.4 and Timing Rules

Question 4.4, which asks for the date of the first rent increase after 11 February 2003, has historically caused the most confusion. This question determines whether a landlord must wait 52 or 53 weeks before serving a new rent increase notice. The additional week accounts for the fact that 52 weeks fall slightly short of a full calendar year, preventing rent increase dates from gradually moving earlier each year.

The guidance advises leaving this field blank if no increase has occurred since that date. However, many landlords with long tenancy histories may not have precise records dating back that far. In such cases, landlords should use the best available information and document any uncertainties. Where accuracy cannot be established, obtaining legal advice is advisable to avoid invalid notices or disputes.

Ensuring Validity: Notice Periods and Service Requirements

Question 4.6 requires the date the new rent will take effect. The form’s guidance, referencing Note A, outlines three concurrent conditions: the notice must be served at least two months before the new rent starts; the new rent cannot begin until at least 52 (or sometimes 53) weeks have passed since the last increase or since the tenancy began if no prior increase exists; and the new rent must commence at the start of a tenancy period (for example, the 15th of the month if rent is due monthly on that date).

Failure to meet any of these conditions renders the notice invalid, necessitating a new notice and restarting the notice period. Additionally, the form must be served in its entirety, including Section 5, which informs tenants of their right to challenge the proposed rent increase at the First Tier Tribunal. Omitting any part of the prescribed form risks invalidation.

Practical Considerations for Serving Form 4A

Landlords must retain evidence of service, as the burden of proof lies with them if the validity of the notice is questioned. Acceptable methods include personal delivery, leaving the notice at the tenant’s address, registered post, or email where permitted by the tenancy agreement. Maintaining records such as delivery receipts, tracked post confirmations, or email sent items is essential for demonstrating compliance.

Page 9 of Form 4A serves as a continuation sheet for completing sections that require additional space and does not require tenant signatures. Notably, the form does not require tenants to sign to accept or dispute the rent increase, reinforcing that the process is unilateral but subject to tribunal challenge.

What this means for landlords

For landlords and letting agents, the introduction of Form 4A demands careful attention to detail and adherence to the prescribed process to ensure rent increases are legally valid. The form’s guidance notes, though sometimes overlooked or difficult to interpret, provide essential instructions that can prevent costly errors and delays.

Landlords should be particularly vigilant when completing Section 4, verifying tenancy start dates and rent increase histories where possible. In cases of uncertainty, especially with long-term tenants or incomplete records, seeking professional legal advice can help mitigate risks. Proper service and record-keeping are equally important to withstand any challenges or investigations.

What TLA members should consider

• Review the guidance notes on Form 4A thoroughly before completing the form, paying close attention to Note A at the end.
• Confirm the original tenancy start date for each tenant, considering whether renewals constitute new tenancies for your circumstances.
• Maintain accurate records of all rent increases, including dates, to comply with the 52/53 week timing rules.
• Ensure the notice is served at least two months before the proposed rent increase and that the new rent start date aligns with tenancy periods.
• Serve the complete Form 4A without alterations or omissions, including tenant information on dispute rights.
• Keep robust evidence of service using methods permitted by the tenancy agreement, such as tracked post or email receipts.

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