Since their introduction on 1 April 2017, the premiums have enabled the relevant authorities to collect millions of pounds in additional council tax.
Ers iddynt gael eu cyflwyno ar 1 Ebrill 2017, mae'r premiymau wedi galluogi'r awdurdodau perthnasol i gasglu miliynau o bunnau mewn treth gyngor ychwanegol.