17/09/2026
If you are putting a rent increase in writing this year, the figure you write down is now the most you can ever get.
That is new. Under the old rules the tribunal could decide your property was worth more than you had asked for, and award the higher figure. It did exactly that in around 8% of cases.
Since 1 May it cannot. Your notice is a ceiling.
We read all 1,470 rent tribunal decisions published in England over the last two years. In three of the new-rules cases the tribunal worked out a market rent higher than the landlord had asked for, and had to come back down to the landlord's figure. In one, the tribunal's own valuation was £1,450. The landlord had asked for £1,415. The landlord got £1,415.
So do not pitch high to leave room for negotiation, and do not pitch low either. Put down the figure you can actually back up with evidence, because it is the only number that counts now.
Worth saying: only 46 cases have been decided under the new rules so far, so this is an early picture rather than a settled one.
Full research: https://goldsmith-property.co.uk/blog/rent-tribunal-cases-have-trebled-since-1-may-what-1-470-decisions-tell-landlords/65775