Delays in construction projects have been a recurring and global problem for decades. In many countries, particularly developing countries, delays in land acquisition are considered one of the largest contributors of delays in large construction projects. In Vietnam, one key cause of these delays stems from equity perceptions of land-acquired communities who perceive themselves to be disadvantaged or let down by the land acquisition process. However, the formation of these equity perceptions has not been sufficiently investigated. Further, the relationship between equity issues on perceptions of land-acquired households and delays in construction projects has also not been clarified by existing literature that cannot help to adequately figure out solutions to these delays.Therefore, this research aims to investigate the formation of equity perceptions of land-acquired households and the relationship between equity issues and delays in construction projects. To implement this aim, a theoretical model is proposed that link between equity issues, comparisons, equity perceptions, and responses of landacquired communities causing delays in large construction projects in Vietnam.After that, the case study approach and semi-structured interviews of 40 landacquired households are conducted across two case studies, which are two large construction projects in Vietnam. Content and thematic analysis of the data collected was performed using Nvivo software to verify the four propositions issues and delays, which can help to address minimise delays in large construction projects. In addition, the principles of equity may be applied to project management to improve project performance, which in turn, will enable more successful project outcomes.