Rent Increase Date Checker

Work out the earliest date a new rent can start under a Section 13 notice (Form 4A) in England — and which rule sets it.

The date the tenancy beganHow often rent is dueThe day of the month each rent period beginsCheck your tenancy agreement. Form 4A's own example: “if a monthly tenancy starts on the 20th of April, the new rent must start on the 20th day of the month when the increase begins.”The date you will serve the noticeThe date the last rent increase took effect (leave blank if there has been none)

How the three rules work, with a worked example: our Section 13 rent increase guide. The mistakes that make a notice fail: how a Form 4A notice becomes invalid.

This tool works out dates from the rules for a rent increase notice served on or after 1 May 2026 for an assured tenancy in England. It is general information, not legal advice, and it does not produce or check a notice. Nothing you enter is sent or stored.