Biggest and smallest council tax rises in Wales (2026/27)
Vale of Glamorgan had the highest rise in Band D council tax of Wales’s 22 councils in 2026/27, at 6.6%.
Neath Port Talbot had the lowest, at 4.1%. The middle council, Merthyr Tydfil, had 5.3%.
Annual council tax change is measured differently in each nation, so Open Index ranks it within Wales only.
See it on the map| Rank | Council | Value |
|---|---|---|
| 1 | Vale of Glamorgan | 6.6% |
| =2 | Caerphilly | 6.5% |
| =2 | Conwy | 6.5% |
| 4 | Monmouthshire | 6.1% |
| 5 | Flintshire | 5.8% |
| =6 | Denbighshire | 5.5% |
| =6 | Gwynedd | 5.5% |
| =8 | Ceredigion | 5.4% |
| =8 | Isle of Anglesey | 5.4% |
| =10 | Carmarthenshire | 5.3% |
| =10 | Merthyr Tydfil | 5.3% |
| =10 | Newport | 5.3% |
| =10 | Wrexham | 5.3% |
| =14 | Pembrokeshire | 5.2% |
| =14 | Powys | 5.2% |
| 16 | Bridgend | 5.1% |
| 17 | Torfaen | 4.7% |
| =18 | Cardiff | 4.5% |
| =18 | Rhondda Cynon Taf | 4.5% |
| =18 | Swansea | 4.5% |
| 21 | Blaenau Gwent | 4.2% |
| 22 | Neath Port Talbot | 4.1% |
Worked out by Open Index from the Band D council tax figures. Source and method · See it on the map