Section 13 rent increase calculator
From 1 May 2026, all rent increases must use a Section 13 notice. This calculator tells you the earliest you can increase rent and when to serve the notice.
Leave blank if the rent has never been increased.
Rules for Section 13 rent increases
- — Maximum once per year (12 months between increases)
- — Minimum 2 months' notice required
- — Must use the prescribed Section 13 form
- — Rent review clauses in tenancy agreements are void from 1 May 2026
- — Tenants can challenge the increase at the First-tier Tribunal
- — The Tribunal cannot increase the rent above what you proposed
- — Advertising a property above the rent you're willing to accept is banned
Note: The government may introduce a maximum percentage increase tied to inflation. Check GOV.UK for the latest guidance before serving a Section 13 notice.