My AST is ending soon, and my tenants want to renew. How much can I legally increase the rent without them challenging it, and what's the best way to serve Section 13 notice in the current UK market?

Quick Answer

Landlords can legally increase rent to market rate. Section 13 notice on Form 4 presents the increase, but tenants can challenge it at a First-tier Tribunal if deemed above market value.

## What are the legal limits on rent increases for an AST? There are no specific statutory caps on how much a landlord can increase rent for an Assured Shorthold Tenancy (AST) in the UK. However, the increase must be fair and realistic, reflecting prevailing market rates for comparable properties in the area. According to government guidance, if a tenant believes the increase is above market rent, they have the right to challenge it at a First-tier Tribunal, which can determine the market rent for the property. This means that while you can propose any figure, it must withstand scrutiny against local rental values. Landlords often aim for a rental yield that covers costs such as an average BTL mortgage rate of 5.5-6.5% and leaves a profit margin. ## How can a rent increase be proposed to the tenant? Rent increases can be proposed in several ways, but only one is legally enforceable if the tenant doesn't agree to it in writing: **1. By Mutual Agreement:** The simplest way is to agree on a new rent with your tenant. This should be recorded in a new tenancy agreement or an addendum to the existing one. For example, if your current rent is £900, you could propose £950, and if the tenant agrees, this becomes the new contractual rent. **2. Rent Review Clause:** If your existing AST includes a rent review clause, you must follow the process outlined within it. These clauses typically specify when and how rent can be increased, and often reference market rates or RPI. **3. Section 13 Notice:** To formally propose a rent increase during a periodic tenancy (after the fixed term ends) or to convert a fixed-term agreement into a statutory periodic tenancy with a new rent, you must serve a Section 13 notice using Form 4. This notice requires at least one month's notice for a yearly tenancy and six months' notice for an annual tenancy. For instance, if you had a tenant paying £1,000/month and wanted to increase it to £1,100, you would serve Form 4, giving the correct notice period. Councils can charge premiums on second homes, as of April 2025 up to 100%, meaning landlords need to ensure their rental income covers expenses efficiently. ## What happens if the tenant challenges the rent increase? If a tenant challenges a rent increase served via a Section 13 notice, they can apply to the First-tier Tribunal (Property Chamber) to have the rent determined. The Tribunal will assess the rent based on local market conditions for similar properties. If the Tribunal finds that the proposed rent is above market value, they can set the new rent at what they consider to be a fair market rate. For example, if you proposed £1,500/month, and the Tribunal determined that comparable properties only achieve £1,350/month, that lower figure would become the legally enforceable rent. This process incurs administrative costs and can delay the implementation of a new rent, impacting your BTL investment returns. ## Are there any specific considerations for serving Section 13 notice in the current market? The current UK market sees increased tenant protections and scrutiny over landlord practices, especially with the Renters' Rights Bill expected in 2025. When serving a Section 13 notice, ensure you adhere strictly to the procedural requirements, using the correct Form 4 and giving adequate notice. Documentation of local market rents, such as printouts from property portals for comparable properties, can support your proposed increase if challenged. With rising costs and the Bank of England base rate at 4.75%, ensuring a reasonable, justifiable rent increase is key to maintaining long-term tenant relationships and avoiding disputes that add to property management overheads. ## What are the implications for a landlord seeking to increase rent? For a landlord, the primary implication is ensuring any proposed rent increase is justifiable by market conditions. A fair rent increase helps maintain tenant relationships and reduces the likelihood of vacancies, which incur re-letting costs. It's crucial to balance achieving optimal rental yield, which is often a key consideration for landlords seeking to cover expenses and generate profit, against the risk of the tenant challenging the increase. An unreasonable increase could lead to tribunal involvement, potentially setting a lower rent. Maintaining an EPC rating of 'E' or higher is also a current requirement, with 'C' potentially by 2030, which can also influence perceived rental value.

Steven's Take

Renegotiating rent needs a sensible approach. You need to be confident your proposed increase mirrors the actual market rate, not just your desired return. Always gather evidence of comparable rents in the area before you propose anything. If a tenant feels the increase is unfair, they can – and often will – challenge it at a First-tier Tribunal. This means delays and potentially a lower rent set by the tribunal than you hoped for. Focus on open communication and justifying your figures with solid market data to avoid unnecessary disputes. This careful management is what distinguishes a successful portfolio from one that struggles.

What You Can Do Next

  1. 1. Research local market rents: Check property portals like Rightmove and Zoopla, and consult local letting agents, to establish the current market rent for comparable properties. Document these findings.
  2. 2. Communicate proactively with your tenant: Discuss your intention to increase rent and the proposed amount. This can prevent disputes before they escalate and gives the tenant chance to express any issues. Find local letting agent contact details via ARLA Propertymark's website.
  3. 3. Serve Section 13 notice if necessary: If you cannot reach mutual agreement, download and complete Form 4 (Notice of Landlord's Proposal to Vary a Term of a Periodic Tenancy) from gov.uk/government/publications/form-4-notice-of-landlords-proposal-to-vary-a-term-of-a-periodic-tenancy. Ensure the correct notice period is given.
  4. 4. Understand the First-tier Tribunal process: If a tenant challenges the increase, familiarise yourself with the process at gov.uk/housing-tribunals, potentially seeking advice from a property lawyer or landlord association.

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