Trade Unionist and Socialist Coalition By-elections
| Election | Constituency | Candidate | Vote count | Vote share | Position |
| 5 October 2023 | Rutherglen and Hamilton West | Christopher A Sermanni | 178 | 0.6% | 10th |
| 3 March 2022 | Birmingham, Erdington | Dave Nellist | 360 | 2.1% | 3rd |
| 28 February 2013 | Eastleigh | Daz Procter | 62 | 0.1% | 13th |
| 29 November 2012 | Middlesbrough | John Malcolm | 277 | 1.6% | 7th |
| 29 November 2012 | Rotherham | Ralph Dyson | 281 | 1.3% | 9th |
| 15 November 2012 | Manchester Central | Alex Davidson | 220 | 1.3% | 8th |