Free tool · Section 13
Is your rent increase lawful?
Enter the tenancy and Noticr verifies the statutory dates as you type — the 12-month interval, the 2-month notice period, and the rent-period boundary. Free to check; no account needed.
Tenancy details
What this rent increase calculator checks
A Section 13 notice fails on dates more often than on figures. The calculator verifies the three statutory timing rules that void a Form 4A before a tribunal ever looks at the amount:
- The 12-month interval. Rent on the same tenancy can rise only once every 52 weeks through Section 13 — measured to the day, not by calendar year. The calculator checks your last increase date against the proposed service date, including the 53-week edge case for long-running tenancies.
- The two-month notice period. Since 1 May 2026 the Renters’ Rights Act 2025 requires at least two months between service and the new rent taking effect. The calculator works this out from your service method and flags a notice that lands short.
- The rent-period boundary. The new rent must start on the first day of a rental period — the rule that voided the notice in Mooney v Whiteland [2023] over a single misaligned day. The calculator derives the valid effective dates from your tenancy start date.
What it deliberately doesn’t rule on is the amount. England has no statutory limit on rent increases — the practical ceiling is the market rent test applied by the First-tier Tribunal, so how much a landlord can increase rent depends on local comparable evidence, not a percentage rule.
When the dates check out, the next step is serving the increase on the prescribed form: download the official Form 4A or have Noticr generate it filled-in and compliance-checked, then follow the service rules so the notice actually sticks.