Property & Landlord2 min check

Rent Increase Calculator

Calculate a fair, evidence-backed rent increase using CPI, local market data and statutory limits.

Short answer

Within a fixed-term AST: only if the contract has a rent review clause. Periodic tenancy: use Section 13 notice, max once per year, market rate. Rolling fix: agree by mutual written variation. Renters' Rights Bill (England) will further restrict mid-tenancy increases.

Step 1 of 10%

How it works

We check tenancy type (fixed/periodic), last increase date and proposed amount. If the route is Section 13, we set out the 1-month notice (2 months for yearly tenancies) using Form 4.

Worked example

Periodic AST, last increase 18 months ago, proposed rise £950 → £1,000. Serve Form 4 with at least 1 month's notice. Tenant can challenge at First-tier Tribunal if above market rate.

Who should use this

•Landlords planning an increase mid-tenancy
•Tenants checking if a notice is valid
•Letting agents managing multi-property reviews

Common mistakes

×Increasing rent by email instead of using Form 4
×Increasing more than once a year on a periodic tenancy
×Going significantly above local market rate without justification (tribunal risk)
×Forgetting Section 21 cannot be used to force a rent rise

Frequently asked questions

Can rent be increased during a fixed term?▾

Only if the tenancy agreement explicitly includes a rent review clause. Otherwise wait for renewal or periodic.

How much notice for Section 13?▾

1 month for monthly tenancies, 2 months for quarterly, 6 months for yearly.

Can the tenant refuse?▾

They can refer to the First-tier Tribunal which sets the market rent. They can't simply refuse to pay.

Related calculators

Section 21 Checker →Landlord Compliance →Deposit Protection →