My Tenant Has Challenged My Rent Increase. What Do I Do?
The tribunal cannot set your rent higher than what you proposed. Under the Renters’ Rights Act 2025, the First-tier Tribunal is capped at the figure in your Form 4A notice. It can match or reduce it, never increase it. The worst outcome is the rent you already asked for.
Start with the response deadline.
What you will receive
The First-tier Tribunal (Property Chamber) will send you a copy of your tenant’s Rents 1 application and any documents they attached. This is the formal notice that your rent increase has been challenged.
Respond by the tribunal’s deadline
There is no separate landlord form to fill in. After the application is made, the tribunal sends you directions setting out what to file and by when. Read the directions carefully — the deadlines they impose are binding, and missing them can mean your evidence is given less weight or excluded.
Your response should cover:
- Your proposed rent and why you set it there: reference comparable properties, local market conditions, any recent improvements to the property
- Comparable evidence: what similar properties in the area have recently let for (see the evidence section below)
- Property details: bedrooms, condition, amenities, anything that supports the market rate
- Whether you want an oral hearing or are content with a paper determination: if the facts are straightforward, a paper determination is faster; if the property’s condition or comparables are disputed, request a hearing
Send your written response and evidence to both the tribunal and your tenant by the date in the directions.
Prepare your evidence
The tribunal determines the open-market rent: what a new tenant would pay for the property if it were advertised today. The panel includes RICS-qualified surveyor members with local market knowledge, but your evidence shapes the outcome.
What carries the most weight:
| Evidence type | Weight |
|---|---|
| Actual tenancy agreements for comparable lets | Strongest |
| Agent letters confirming agreed rents | Strong |
| Rightmove / Zoopla listings (asking prices) | Medium |
| Estate agent valuation letter | Medium |
Find recently let properties nearby with similar size, type, and condition. “Let Agreed” listings on Rightmove and Zoopla reflect transactions, not just asking prices. Include photos, room counts, and note any differences from your property.
Submit your evidence as early as possible — by the deadline in the tribunal’s directions at the latest. Late evidence can be given less weight or excluded entirely.
The best time to gather this evidence is before you serve the notice. If you used our Form 4A generator and set the proposed rent based on current market comparables, you already have a head start.
What the Tribunal Considers
The tribunal must disregard three things when setting market rent:
- Sitting-tenant effect: rent is assessed as if for a new tenant, not the existing relationship
- Tenant-funded improvements: if your tenant installed a new kitchen at their own cost, the tribunal values the property as if it were not there
- Tenant’s own breaches: damage the tenant caused does not reduce the assessed rent
The tribunal also ignores the current rent level, the size of the proposed increase, and either party’s personal financial circumstances. The exercise is purely about what the open market would produce.
What the tribunal does consider: the property’s actual condition, location, amenities, and what comparable properties have recently let for. If the property has maintenance issues, this can reduce the assessed rent. A well-maintained property supports a higher figure.
The ceiling rule
Under the Renters’ Rights Act 2025, the tribunal cannot set rent above the figure in your Form 4A notice. This is established by the new section 14ZB(5) of the Housing Act 1988.
In practice, this means:
- If the market rent is lower than your proposed figure → the tribunal sets the lower figure
- If the market rent matches or exceeds your proposed figure → your proposed figure stands
You cannot end up with a rent higher than what you asked for. Under the old law, the tribunal could set a higher figure if market evidence supported it. That is no longer possible.
Possible outcomes
| Outcome | What happens |
|---|---|
| Tribunal confirms your proposed rent | Tenant pays the confirmed rent going forward |
| Tribunal sets a lower figure | Tenant pays the lower rent going forward |
| Tenant withdraws | The most common informal outcome, often following a negotiated agreement |
| Application dismissed | Your notice takes effect on the date you specified |
What rent you collect during the process
Your tenant continues paying the old rent throughout. Under the Renters’ Rights Act 2025, the proposed new rent does not take effect while the tribunal application is pending. Once the tribunal decides, the determined rent applies going forward. There is no backdating, so you cannot collect the difference for the months the case was pending.
This means a challenge delays the rent increase for the duration of the case, typically 6–9 months. Factor this into your planning. The best protection against delay is a well-evidenced proposed rent that is genuinely at or near the market rate. Tenants are less likely to challenge an increase they know the tribunal will confirm.
What a hearing looks like
If the case goes to an oral hearing rather than a paper determination: a conference table, not a courtroom. The panel includes a judge and one or more surveyor members, and sits across from the parties. No wigs or formality. The panel asks questions of both sides. Legal representation is not required and is unusual. Remote hearings by video are available.
For your next notice, start with the Form 4A serving checklist and gather comparables before choosing the proposed rent.
Frequently asked questions
- No. Under the Renters' Rights Act 2025, the tribunal is capped at the figure in your Form 4A notice. It can confirm or reduce the rent. It cannot increase it. The worst outcome for a landlord is the rent you already proposed.
- No. The tribunal is designed for self-representation. Most landlords and tenants appear without legal representation. The panel includes a judge and one or more RICS-qualified surveyors, and asks questions of both sides. It is inquisitorial, not adversarial.
- Typically 6–9 months from application to determination for cases going to an oral hearing. Paper determinations can be faster. Caseload has risen since the Renters' Rights Act 2025 came into force on 1 May 2026, so the realistic wait may be longer.
- Under section 14(A3) of the Housing Act 1988 (as amended), a tenant can ask the tribunal to find that the notice is invalid. If the tribunal agrees, the notice is set aside and you must re-serve a corrected one. If the tribunal finds the notice is valid, the case proceeds to a market rent assessment in the usual way.
- You can negotiate directly with your tenant at any time. If you agree a figure, the tenant can withdraw their application. There is no formal mechanism for a landlord to unilaterally withdraw a served notice, but a negotiated outcome is common. Many tribunal applications end this way.