Tax on rental income charged at uncommercial rent

Hi, Are there any tax implications of renting out a property to a family member at below market rates other than expense deductions being capped at the amount of the rental income as per PIM2130? The reason I ask is because I was recently told that when renting out a property at uncommercial rates the tax due is based on the market rate rather than the actual (lower) rental income received, but I cannot find any information to that effect on the HMRC website. Thanks

Hi,

There are no other tax implications to letting a property at below the commercial rate, apart from those restricting the expenses that can be claimed.

Thank you.