Rent Increase Calculator
See whether you can increase the rent right now under the once-every-12-months rule, the earliest the increase can take effect, and the annual change in pounds.
Allowed now?
Yes
The 12-month window has passed
Earliest effect (2 months' notice)
18 October 2026
If you serve notice today
Annual increase
£1,440
Monthly change
+10.0%
Serve the increase using the prescribed form with at least two months' notice. The tenant can refer an above-market increase to the First-tier Tribunal, which suspends the increase until it decides.
Frequently asked questions
How often can I increase the rent?
Under the Renters' Rights Act 2025, rent can be increased no more than once every 12 months, with at least two months' written notice on the prescribed form.
What notice must I give for a rent increase?
At least two months' written notice using the prescribed form. The increase takes effect when the notice period expires.
Can the tenant challenge the increase?
Yes. The tenant can refer the increase to the First-tier Tribunal (Property Chamber), which will set the rent at market level. The increase is suspended while the Tribunal decides.
This calculator gives general estimates for UK private landlords and letting agents, not legal or tax advice. Figures depend on your circumstances and the rules in your part of the UK — check the detail or take advice before acting.