The New Era of Rent Increase The landscape of UK property management has fundamentally shifted. If you operate within the Private Rented Sector (PRS), the days of informal rent adjustments and buried tenancy clauses are over. Under the Renters' Right Act 2025, which came into full force on 1 May 2026, the rules governing how and when you can increase rent have been entirely rewritten. A Section 13 notice is now the formal, and exclusively lawful, document that a landlord must