A: If you are eligible for Council Tax and the Sharer is a student (or an apprentice or student nurse) then they are exempt from council tax and no additional council tax is payable as a result of them moving in. They are disregarded for the purposes of council tax and you would not in those circumstances lose your single person discount.
If the Sharer is working there is a possibility that, if you are claiming a single person’s 25% discount, this may be withdrawn. However, councils do have different rules as to whether a Sharer can be exempted from council tax so we would suggest that you call your council and discuss your personal situation directly with them. If this happens, you are entitled to request an agreed contribution to Council Tax per month.