Calculate valid rent increase dates, notice periods, and percentage changes under Section 13 of the Housing Act 1988 (as amended by the Renters' Rights Act 2025).
Under the Renters' Rights Act 2025, all tenancies are periodic from 1 May 2026. Landlords must use a Section 13 notice to increase rent, giving at least 2 months' notice. Rent can only be increased once every 12 months.