There are a few tax obligations that come with a buy-to-let property.
First, there is an increased stamp duty land tax on all properties besides your main residence.
You also will be subject to a council tax by your area if your property is unoccupied for more than six months.
Lastly, you will have to pay income tax on any additional revenue from your rental. The tax deductibility of the interest payments as an expense can be found on the HMRC website.