Rent Increase Checker UK 2025 — Is Your Rent Rise Legal & How to Challenge It
Landlords cannot simply raise your rent whenever they choose. For assured shorthold tenancies (ASTs), there are strict rules about how and when rent can be increased. If your landlord has not followed the correct procedure, the increase may be invalid. This checker explains the rules, validates the notice, and tells you how to challenge an excessive or procedurally improper increase.
For periodic ASTs: rent can only be increased once per 12 months using a valid Section 13 (Form 4) notice with at least 2 months notice. During a fixed term, rent cannot be increased without a contractual rent review clause. Always get legal advice if facing a large increase or procedural issues. The Renters Rights Bill proposes further protections — check gov.uk for current status.
When and How Landlords Can Increase Rent
The rules depend on your tenancy type:
Assured Shorthold Tenancies — Fixed Term
During a fixed term, the rent is contractually fixed. It can only be increased if the tenancy agreement contains a specific rent review clause that sets out the mechanism (e.g. annual CPI increase). Without this clause, you are not legally obliged to pay any increase during the fixed term. A landlord cannot use a Section 13 notice during a fixed-term period.
Assured Shorthold Tenancies — Periodic (Rolling)
For periodic tenancies, rent can be increased using a Section 13 notice (Form 4) — but only once every 12 months. The notice must give at least 2 months advance notice (for monthly tenancies — 1 month for weekly tenancies) and must state the new rent amount and effective date. If the landlord does not use the correct form or gives insufficient notice, the increase is invalid and you are not legally obliged to pay the increased amount.
Assured Tenancies
Assured tenancies (older tenancies from before 1997 that were not ASTs) have different rules — rent can only be increased through the tenancy agreement's rent review clause or by applying to a Rent Assessment Committee.
Challenging the Amount at Tribunal
Even if a Section 13 notice is procedurally correct, you can challenge the amount before it takes effect by applying to the First-tier Tribunal (Property Chamber) using Form Rents 1. The tribunal will assess the market rent for the property — what a willing landlord and willing tenant would agree. Key points:
- Apply before the effective date of the increase — you cannot apply after it has already taken effect
- The tribunal can set any rent up to the market rate — but cannot set a rent lower than your current rent
- The tribunal process is free for tenants
- Gather evidence: comparable rents for similar properties in the area, details of the property's condition, and any disrepair issues
The Renters Rights Bill — Upcoming Changes
The Renters' Rights Bill (progressing through Parliament in 2025) proposes significant changes to rent increases, including: limiting above-market rent increases and strengthening the tribunal process for challenging them; additional protections against excessive increases; and measures to prevent landlords from using rent increases as a backdoor eviction tool (where the landlord proposes an unaffordable rent to force a tenant out). Check gov.uk for the current status of these reforms.
Frequently Asked Questions
Verbal agreements can in theory be binding, but proving them is difficult. More importantly, for a Section 13 rent increase to be legally effective, it must be in writing using the prescribed form. A verbal agreement outside the correct statutory process does not give the landlord the right to unilaterally raise your rent. If you are concerned about what you agreed verbally, take legal advice.
Even if a Section 13 notice is procedurally valid, an extreme above-market increase can be challenged at the First-tier Tribunal. The tribunal will determine the market rent — if the proposed rent is significantly above market, the tribunal will set a lower rent. Document comparable rents for similar properties in your area before applying. Apply before the effective date shown on the notice.
Yes — if you do not apply to the tribunal before the effective date, the new rent will take effect automatically on that date, provided the notice was validly served. You cannot apply to the tribunal after the effective date has passed. Always act quickly if you receive a Section 13 notice and want to challenge it.