Form 4A: the prescribed rent increase notice

From 1 May 2026 Form 4A is the only valid way to increase the rent. Letters and informal agreements no longer work.

Form 4A is the prescribed Section 13 notice for proposing a new rent on an assured periodic tenancy in England. Under the Renters' Rights Act it is the only legal way to increase rent.

The increase cannot take effect for at least 2 months after the notice is served. A landlord can serve only one Section 13 notice per tenant in any 52-week period, and not within the first 12 months of a new tenancy.

What you need

  • The official Form 4A from gov.uk.
  • The current rent and the proposed new rent.
  • The date the new rent will start (at least 2 months from notice service).
  • Compliance with the once-per-52-weeks rule.

Tenant challenge route

Tenants who think the proposed rent exceeds the open market rate can refer the notice to the First-tier Tribunal (Property Chamber). The tribunal sets the rent it considers fair. Landlords cannot recover rent above the tribunal-set figure.

Common mistakes

  • Using a letter or email asking for an increase. Not valid; tenant is not legally bound.
  • Trying to increase by more than the open market rent. Tenant can challenge at the First-tier Tribunal and likely win.
  • Increasing in the first 12 months. Not allowed.
  • Two notices in the same 52-week period. The second one fails.

Source: gov.uk Guide to the Renters' Rights Act 2025. Last verified 2026-05-09. This page is informational, not legal advice. For complex disputes, consult a solicitor.