What Happens If a Tenant Challenges a Rent Increase in England

The Tenant's Right to Challenge

When you serve a Form 4A notice proposing a new rent, the tenant does not have to accept it. They have the right to apply to the First-tier Tribunal (Property Chamber) for a determination of the open market rent. The application must be submitted before the proposed effective date on your Form 4A. If the tenant does not apply before that date, the proposed rent takes effect automatically.

There is no fee for the tenant to make this application. The process is free, which means the financial barrier to challenging is zero.

What Happens During a Tribunal Challenge

Once the tenant files an application, the tribunal issues directions to both parties — landlord and tenant — with deadlines for submitting written evidence. Most Section 13 rent determinations are decided on the papers, meaning the tribunal reads the submissions without holding a hearing. Either party can request an oral hearing, but this is less common.

A tribunal member or surveyor may inspect the property to assess its condition, size, layout, and state of repair. This is relevant because the tribunal determines the rent the property would achieve on the open market in its current state.

While the application is pending, the tenant continues paying the existing rent. They do not need to pay the proposed new figure during the determination process.

What the Tribunal Can Decide

The tribunal determines the open market rental value of the property. Three rules govern the outcome:

The ceiling rule. The tribunal cannot set a rent higher than the figure you proposed on Form 4A. Your proposed amount is the absolute maximum. If the tribunal determines that market rent is actually higher than what you asked for, it will set the rent at your proposed figure — not above it.

No backdating. The determined rent takes effect from the date of the tribunal's decision, not from the original effective date you wrote on Form 4A. This means you cannot recover the difference between the old rent and the new rent for the period between your proposed start date and the tribunal's decision date. If your Form 4A proposed an effective date of 1 September and the tribunal issues its decision on 15 November, the new rent runs from 15 November.

Hardship deferral. If paying the new rent immediately would cause the tenant undue financial hardship, the tribunal can defer the start date by up to two months.

What Evidence Matters

The tribunal assesses market rent based on comparable local lettings. Following the Skylark Point decision, agreed transaction rents — the amounts tenants are actually paying under executed tenancy agreements — carry greater weight than advertised asking prices on property portals.

If you are defending your proposed figure, submit:

• Agreed rents for comparable properties within a reasonable radius (typically 0.5 miles), including property type, number of bedrooms, condition, and tenancy start date
• Agent valuations from local letting agents who can attest to current market conditions
• Evidence of any improvements you have made to the property (new kitchen, energy efficiency upgrades, structural repairs) that increase its rental value

Advertised rents from Rightmove or Zoopla are less persuasive. They show what landlords hope to charge, not what tenants are actually paying.

How Common Are Challenges?

Most rent increases at or near market rate go through without a tribunal referral. Challenges are more likely when:

• The proposed increase is significantly above what comparable local properties are achieving
• The property has maintenance issues the landlord has not addressed
• The tenant is on housing benefit and the proposed rent exceeds the Local Housing Allowance rate, creating a shortfall the tenant cannot cover

A reasonable, evidence-backed proposal — grounded in actual local letting figures rather than a target yield — is the best protection against a challenge, and the strongest position if one arrives.

Be Prepared Before You Serve

Gathering market evidence before you complete Form 4A means you set a defensible figure from the start. Our Section 13 rent increase guide includes a market evidence collection grid and a step-by-step walkthrough of the tribunal process, so you know exactly what to prepare if a tenant refers your increase.

See more England guides →