Tell your local council promptly about changes that could affect your Council Tax Support, such as moving home, changes to your household, income, savings, benefits or circumstances. The reporting deadline and rules vary between councils, so check your award letter or the council’s Council Tax Support page for details. You may be asked for evidence, such as payslips or benefit notifications. If you do not report a change, your support could be recalculated and you may have to repay an overpayment; the council decides this based on your circumstances.