On 3 March 2021, it was announced that the temporary tax reduction period would be extended by 3 months, to 30 June 2021.
Ar 3 Mawrth 2021, cyhoeddwyd y byddai'r cyfnod lleihau treth dros dro yn cael ei ymestyn 3 mis, i ddod i ben ar 30 Mehefin 2021.