In each three-month period since April 2018, around 50% to 70% of the tax due has been contributed by transactions with a non-rental value greater than £1 million.
Ym mhob cyfnod o dri mis ers Ebrill 2018, mae tua 50% i 70% y dreth sy’n ddyledus wedi'i chyfrannu gan drafodiadau sydd â gwerth nad yw'n werth rhent o fwy na £1 miliwn.