Understanding Rent Increase Rules for Renters in Wales

Rent, Deposits & Increases Wales published: June 29, 2025 Flag of Wales

If you rent your home in Wales, knowing how and when your landlord can increase the rent is important for budgeting and peace of mind. This guide explores rent increase rules for renters in Wales, including notice periods, official forms, how to challenge a rent increase, and key legal protections. Everything here is based on current Welsh legislation and official government resources.

When Can a Landlord Increase Rent in Wales?

Since 1 December 2022, most tenancy agreements in Wales are considered 'occupation contracts' under the Renting Homes (Wales) Act 2016[1]. Your landlord can only increase your rent following strict rules:

  • Frequency: Normally, rent can only be increased once per year for standard occupation contracts.
  • Notice: Landlords must give at least 2 months’ written notice before the new rent starts.
  • Rent increases usually take effect on or after the anniversary of your contract start date.

The RHW12 Form: Notice of a Rent Increase

Landlords must use the official RHW12 form ("Notice of a rent increase under Section 116 of the Renting Homes (Wales) Act") to notify you. If you receive this form, it means your landlord intends to increase your rent.

  • Download the RHW12 form from the Welsh Government
  • Example: If your rent increase is proposed for 1 September, you must receive the RHW12 form by 1 July at the latest.
  • If you do not receive the official form or the correct notice period is not given, the rent increase is not valid.

Can You Challenge a Rent Increase?

If you believe the proposed new rent is unfair or above the market rate, you have the right to challenge it.

  • You must apply within 2 months of receiving the RHW12 notice.
  • The application is made to the Residential Property Tribunal Wales.
  • This is the official body that resolves rent disputes between renters and landlords in Wales.
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How to Object to a Rent Increase

  • Fill in the Residential Property Tribunal application form for rent evaluation (no official form number, but available directly from the Tribunal).
  • Provide details of your current rent, the proposed increase, and any evidence (e.g. similar rents in your area).
  • You must send your application before the rent increase is due to start.
  • Find the Rent Assessment Application pack and more information here.
If you’re worried about a rent increase, act quickly—there is a strict time limit to challenge it.

Your Rights If Your Rent Goes Up

To summarise your key rights as a renter under Welsh law:

  • You must receive a formal RHW12 notice at least 2 months before any increase.
  • Rent can only be increased once per year in most cases.
  • You have the right to challenge the increase through the Tribunal if it's unreasonable.
If you think your landlord hasn’t followed the correct process, seek advice right away. The rent increase cannot be enforced if legal procedures aren’t followed.

What Happens After You Challenge a Rent Increase?

The Residential Property Tribunal examines the proposed rent, compares it to similar properties, and decides if it is fair. If the Tribunal agrees with your objection, they can set a different rent amount. Both parties must accept the Tribunal's decision.

FAQ: Rent Increases in Wales

  1. Can my landlord increase the rent more than once a year?
    Generally, no. Most occupation contracts in Wales only allow for a rent increase once every 12 months, and this must follow a strict notice process.
  2. What if my landlord doesn’t use the RHW12 form?
    If you do not receive the RHW12 rent increase notice, or don't get at least 2 months’ notice, the increase is not legally valid and you can object.
  3. How can I compare my proposed rent to similar properties?
    You can check local letting agent adverts or ask Shelter Cymru for advice, as well as referencing evidence in your Tribunal application.
  4. Is the Tribunal decision final?
    The Residential Property Tribunal’s decision is legally binding for both renters and landlords once issued.
  5. Do I need legal representation to go to the Tribunal?
    No. You can represent yourself and often do not need a solicitor to challenge a rent increase in Wales.

Conclusion: Key Takeaways for Renters in Wales

  • Landlords in Wales must give at least 2 months’ notice on the RHW12 form before increasing rent, and can usually do so only once per year.
  • You have the right to challenge an unreasonable rent increase through the Residential Property Tribunal Wales.
  • If the landlord doesn’t follow the legal process, the rent increase is not valid.

If you're unsure about your situation, always check your contract and seek official advice promptly.

Need Help? Resources for Renters


  1. Renting Homes (Wales) Act 2016 – Primary legislation governing tenancies in Wales.
Bob Jones
Bob Jones

Editor & Researcher, Tenant Rights UK

Bob writes and reviews tenant law content for various regions. They’re passionate about housing justice and simplifying legal protections for renters everywhere.