In the meta-analysis, we combined evidence across studies from different theoretical perspectives addressing the association between partner support (responsive, practical and negative support) and goal outcomes (self-efficacy, commitment and progress). The sample included 195 effect sizes from 36 samples with 10,130 participants in romantic relationships. The results were analysed using a random-effects multilevel model and the overall effect size was r = .25. This effect size is comparable to strong individual predictors of goal outcomes (e.g. high intention to achieve a goal) highlighting the importance of close relationships in goal pursuit. In line with the theory of thriving through relationships, the findings suggested that both responsiveness (r = .27) and practical (r = .22) support are helpful for goal outcomes whereas negative (r = −.14) support can hinder goal pursuit. Existing studies have strong methods but lack validated measures. Results have implications for areas including changing health behaviours and improving occupational, educational and therapy outcomes.