Is there a qualifying period for WHD as I’m thinking of getting my father transferred to bulb as currently with npower but not if he is not eligible for the 2018/19 WHD
If your father is of pensionable age, he’ll automatically be credited the WHD. Switching energy supplier will not affect this.
If you qualify as a core group member, the Department for Work and Pensions will send you a letter between 11th October and 23rd November later this year to let you know what you need to do to receive the credit.
If you qualify, you’ll receive £140 (inc. VAT) in your Bulb account between October 2018 and March 2019.
If he is in the Broader Group, please give this page a read.