How much notice do I need to give for a rent increase?
At least two months, using Form 4A under section 13 of the Housing Act 1988. The new rent must also start on the first day of a period of the tenancy, which for monthly rent means a rent due day. The calculator moves the date forward to the first rent day that meets every rule.How often can a landlord put the rent up?
Once a year. Since 1 May 2026, a new rent cannot take effect earlier than 52 weeks after the last increase took effect, or 52 weeks after the tenancy began. A rent review clause in the agreement no longer gives another route: Form 4A is the way to increase the rent for an assured periodic tenancy.Can the tenant challenge the new rent?
Yes. A tenant can refer a Form 4A notice to the First-tier Tribunal before the new rent starts. The tribunal decides the open market rent and cannot set a figure higher than the one in your notice. Proposing a rent in line with similar homes nearby makes a challenge less likely.What if the notice is posted rather than handed over?
The two months run from the day the notice is served, so allow time for it to arrive. Enter the date the tenant will receive it, not the day you post it. If in doubt, choose a later rent day; a later start date is always valid.