Rent Increase Calculator

Enter the current and proposed rent to see the increase in £ and %, plus the earliest date you can lawfully raise it with a Section 13 notice. A free taste of the rent tools in LetProof.

Renters' Rights Act 2025 (England): rent can be raised once every 12 months, using a Section 13 notice with at least 2 months' notice. Tenants can challenge the increase at the First-tier Tribunal before it starts. Guidance only — not legal advice.

Rent details

Current rent

Proposed new rent

Rent is paid

Notice served on (optional)

Increase

—

per month

Percentage

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change

Extra per year

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across 12 months

New annual rent

—

at the new rate

Earliest lawful start date

Section 13 requires at least 2 months' notice. Enter your figures to see the earliest date the new rent can begin.

Weekly rents are annualised as weekly × 52. The earliest start date shown is 2 calendar months from the notice date (or today if none is entered) — the legal minimum for a Section 13 notice. You must also leave at least 12 months since the last increase.

Raise rent the right way, every time

LetProof generates the Section 13 rent-increase notice, records how and when it was served, tracks the 12-month gap and 2-month notice for every tenancy, and keeps a tribunal-ready paper trail — for landlords and letting agents.

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