You will have to pay income tax on the profit you make if you rent out your house.
The profit is calculated as rental income less allowable expenses.
In general all the costs you incur for the property, insurance, repairs etc. are allowable expenses.
There is one significant exception
Interest on any mortgage you may have taken out to buy the property. Only 75% of the interest cost is allowed as an expense. The capital elements of the mortgage are not allowed as an expense.