A rent increase should never arrive as a vague demand or a difficult conversation without context. For tenants, the immediate concern is affordability. For landlords and portfolio owners, the issue is equally important: a rent review that is poorly evidenced or incorrectly served can create avoidable disputes, delay income and damage a good tenancy. The short answer is that, for the relevant assured periodic tenancies in England, there is no general percentage cap such as 5%,