Banter is intrinsic human behavior, it is multifunctional, facilitating social interaction, building rapport and tackling complex and challenging topics of conversation [1]. In light of prevalent social media campaigns challenging acceptance of banter and associating it with poor conduct, such as bullying and harassment, we aimed to understand its role and impacts within workplaces.Surveying over 1000 people, the most commonly accepted topics of banter were age, gender and personality, while unacceptable topics included physical and mental health, religion/faith, sexual orientation and ethnicity). We found that although the majority felt banter had a positive role, and would not ban it, inappropriate banter was significantly damaging to workers mental health and negatively impacted confidence. Furthermore, we found that women were more negatively affected than men, as were younger and less experienced employees. A significant proportion of respondents (around half) reported challenging inappropriate banter; however, women and younger/less experienced staff as well as newly promoted managers felt less enabled to tackle inappropriate banter.With one in five women losing confidence, one in ten women experiencing mental health problems and 1 in 25 people leaving their jobs due to inappropriate banter (according to our findings), banter is potentially damaging to employee"s wellbeing and organisational productivity. Our research makes a strong case for organisations to review and update policies and procedures relating to banter, bullying and harassment and for organisations to provide training to identify and address inappropriate banter.