{"id":"1988b6af-2a9c-43b6-8939-83e6cceb3903","first_published_at":"2025-09-22T08:30:00.000Z","published_revision":{"id":"04865920-668b-4017-9b15-d20c4663c8ed","revision_index":4,"previous_revision_id":"e24ba441-c485-47e0-a1b2-8a4dc5c81a74","created_at":"2026-03-16T17:34:41.102Z","updated_at":"2026-03-19T13:41:29.867Z","approved_at":"2026-03-19T13:41:29.865Z","publish_at":"2026-03-24T09:30:00.000Z","metadata":[{"language":"cy-GB","title":"Lefelau treth gyngor yn ôl awdurdod bilio a band","summary":"Mae'r dreth gyngor yn dâl a godir ar bob anedd domestig ar gyfer darparu gwasanaethau awdurdod lleol. Mae'n cynnwys elfennau ar gyfer y cyngor sir neu'r cyngor bwrdeistref sirol, yn ogystal ag elfennau ar gyfer awdurdod yr heddlu ac, os oes un yn bodoli, y cyngor cymuned lleol.\n\nYn 1991, aseswyd yr eiddo ym mhob sir neu ardal fwrdeistref sirol gan Asiantaeth y Swyddfa Brisio a gosodwyd pob anedd mewn bandiau prisio yn amrywio o A i H. Mae anheddau mewn adeiladau newydd yn cael eu gosod yn un o'r bandiau yn unol â'r hyn y byddai wedi bod werth yn 1991. Ailbrisiwyd yr anheddau yn 2003 ac adolygwyd y bandiau ar gyfer y flwyddyn 2005-06 ymlaen.\n\nY bandiau ar gyfer Cymru ar sail y gwaith prisio yn 1991 oedd:\n\nA - Hyd at £30,000\nB - £30,001 i £39,000\nC - £39,001 i £51,000\nD - £51,001 i £66,000\nE - £66,001 i £90,000\nF - £90,001 i £120,000\nG - £120,001 i £240,000\nH - £240,001 - Dim terfyn uchaf\n\nY bandiau ar gyfer Cymru ar sail gwaith prisio 2003 yw:\n\nA - dan £44,000\nB - £44,001 i £65,000\nC - £65,001 i £91,000\nD - £91,001 i £123,000\nE - £123,001 i £162,000\nF - £162,001 i £223,000\nG - £223,001 i £324,000\nH - £324,001 i £424,000\nI - £424,001 ac uwch","collection":"Mae'r data y gofynnir amdanynt gan awdurdodau lleol, awdurdodau'r heddlu ac a ddarperir ganddynt, yn ofynnol o dan ddeddfwriaeth. ","quality":"Cesglir y data drwy gyfrwng arolwg 100% felly ni chaiff unrhyw amcangyfrif o'r ffigurau ei gyfrifo, ac o'r herwydd, nid oes unrhyw wall samplu.","rounding_description":null,"reason":"Ychwanegwyd data 2026-27."},{"language":"en-GB","title":"Council tax levels by billing authority and band","summary":"Council tax is a charge levied on each domestic dwelling for the provision of local authority services. This includes elements for the county or county borough council, together with elements for the police authority and, if one exists, for the local community council.\r\n\r\nIn 1991, the Valuation Office Agency (VOA) assessed the properties in each county or county borough area and placed each dwelling in a valuation band, ranging from A to H. Dwellings in new buildings are placed in one of the bands according to the value that such a dwelling would have been worth in 1991. The dwellings were revalued in 2003 and the bandings revised for the 2005-06 year onwards.\r\n\r\nThe bandings for Wales based on the 1991 valuation were:\r\n\r\nA - Up to £30,000\r\nB - £30,001 to £39,000\r\nC - £39,001 to £51,000\r\nD - £51,001 to £66,000\r\nE - £66,001 to £90,000\r\nF - £90,001 to £120,000\r\nG - £120,001 to £240,000\r\nH - £240,001 - No upper limit\r\n\r\nThe bandings for Wales based on the 2003 valuation are:\r\n\r\nA - under £44,000\r\nB - £44,001 to £65,000\r\nC - £65,001 to £91,000\r\nD - £91,001 to £123,000\r\nE - £123,001 to £162,000\r\nF - £162,001 to £223,000\r\nG - £223,001 to £324,000\r\nH - £324,001 to £424,000\r\nI - £424,001 and above","collection":"The data requested and provided by local authorities and police are required under legislation.","quality":"The collection is a 100% survey and as such no estimation of the figures is calculated, and hence there is no sampling error.","rounding_description":"","reason":"Added 2026-27 data."}],"rounding_applied":false,"update_frequency":{"date":{"day":"","year":"2027","month":"03"},"update_type":"update"},"designation":"accredited","coverage_start_date":"1996-04-01","coverage_end_date":"2027-03-31","related_links":[{"id":"DqgIt","url":"https://www.gov.wales/council-tax-levels","created_at":"2025-09-01T11:53:00.852Z","label_en":"Council tax levels","label_cy":"Lefelau treth gyngor"}],"providers":[{"id":"c7222aa6-5eec-4735-907f-887b04ce9b5f","group_id":"1e30d98d-0f3c-4c41-8811-84e119c161e8","revision_id":"04865920-668b-4017-9b15-d20c4663c8ed","language":"cy-gb","provider_id":"957edc2c-0234-4a04-a15d-758da2105c49","provider_name":"Awdurdodau Lleol","source_id":"e99f6c72-f8b2-413c-a613-451ef2e212d5","source_name":"Casgliad data Gofynion Cyllideb (BR1)","created_at":"2026-03-16T17:34:41.102Z"},{"id":"61f82835-21f2-45f4-bb1a-3cff556022bd","group_id":"1e30d98d-0f3c-4c41-8811-84e119c161e8","revision_id":"04865920-668b-4017-9b15-d20c4663c8ed","language":"en-gb","provider_id":"957edc2c-0234-4a04-a15d-758da2105c49","provider_name":"Local Authorities","source_id":"e99f6c72-f8b2-413c-a613-451ef2e212d5","source_name":"Budget requirement (BR1) data collection","created_at":"2026-03-16T17:34:41.102Z"}],"topics":[{"id":32,"path":"32","name_en":"Finance and tax","name_cy":"Cyllid a threth"},{"id":34,"path":"32.34","name_en":"Council tax","name_cy":"Treth gyngor"}]},"start_date":"1996-04-01","end_date":"2026-03-31","publisher":{"group":{"id":"0ba88136-ba70-4803-9a91-5de5c93ea4ad","name":"Local Government Finance","email":"stats.finance@gov.wales"},"organisation":{"id":"4ef4facf-c488-4837-a65b-e66d4b525965","name":"Welsh Government"}}}