GRF Board taps surplus to cover possible hike in 2022 Comcast rates The GRF Board on Thursday unanimously approved raising its portion of the 2022 monthly coupon to $308.57 per manor, a 5.99% increase over the 2021 amount of $291.13. The Board had to dip deeper into its surplus to hold the coupon increase to under 6%, as it had said it intended to do, after a last-minute curveball by Comcast.