In each three-month period up to March 2021, around 10% to 30% of the tax due has been contributed by the rental value of non-residential properties.
Ym mhob cyfnod o dri mis hyd at Mawrth 2021, mae tua 10% i 30% o'r dreth sy’n ddyledus wedi'i chyfrannu gan werth rhent eiddo amhreswyl.