Free Calculator
Rent Increase Calculator
Calculate the impact of a rent increase and check your Section 13 notice requirements before serving formal notice.
Current Tenancy
£850/month
Proposed Increase
5%
Immediate
Section 13 Notice
2 weeks (14 days)
New monthly rent
£893
Was £850
+£43/month
Extra per year
+£516
Extra over 5 years
+£2,580
Benchmark comparison
Section 13 rent increase process
Use official Form 4 (Section 13) to propose the increase in writing
Give at least 2 weeks' notice (not mid-tenancy — only once per year)
Tenant can challenge by applying to First-tier Tribunal within the notice period
Tribunal will set market rate — keep your increase reasonable to avoid challenge
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How to Increase Rent Legally in the UK
Under the Renters' Rights Act 2025 (in force), a rent increase must be proposed using a Section 13 notice (Form 4). This form is available free from GOV.UK. You must give at least 2 months' written notice, you can only raise rent once per 12 months, and any contractual rent review clause in the tenancy is void — the Section 13 process is mandatory.
Keeping increases in line with CPI or local market evidence is the safest approach — it minimises the risk of a tribunal challenge. If a tenant refers your notice to the First-tier Tribunal, the tribunal will set a market rent that applies from the date of your original notice.
The Renters' Rights Act 2025 strengthened tenant rights to challenge above-market increases. A well-evidenced, market-rate increase is essential for landlords looking to avoid disputes.
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Frequently Asked Questions
How do I legally increase rent in the UK?
You must use a Section 13 notice (Form 4) to propose a rent increase. Under the Renters' Rights Act 2025, you must give at least 2 months' written notice, you can only increase rent once per 12 months, and the tenant can challenge the increase at the First-tier Tribunal if they believe it is above market rate.
How much can I increase rent in the UK?
There is no statutory cap on how much you can increase rent, but it must be in line with 'the open market rent' or the tenant can challenge it at tribunal. In practice, most landlords limit increases to CPI or 5% to avoid disputes. The Renters' Rights Act 2025 strengthened tenant rights to challenge above-market increases — any contractual rent review clause in the tenancy agreement is now void.
What notice do I need to give for a rent increase?
You must use the official Section 13 notice (Form 4) available from GOV.UK. Under the Renters' Rights Act 2025, you must give at least 2 months' written notice. The increase cannot take effect less than a year after the tenancy started or less than a year after the last increase.
Can a tenant refuse a rent increase?
Yes — a tenant can refer a Section 13 notice to the First-tier Tribunal (Property Chamber) within the notice period. The tribunal will determine the market rent, which could be the same as, higher than, or lower than the proposed increase. Until the tribunal decides, the old rent continues to be payable.
Can I include a rent review clause in an AST?
No — under the Renters' Rights Act 2025 (in force), any contractual rent review clause in a tenancy agreement is void. The Section 13 notice process is the only lawful way to increase rent on a periodic tenancy. Informal agreements or contractual clauses have no legal force.
Disclaimer: This content is for educational purposes only and does not constitute legal advice. Property law is complex and varies by jurisdiction. Always consult an SRA-regulated solicitor or CLC-licensed conveyancer for advice specific to your circumstances.
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