With the closure of schools due to the Covid-19-pandemic, parents of schoolchildren had to quickly adapt their daily schedules by taking over responsibilities of homeschooling for their children, while arranging their own schedule. This study first identifies the parents who are most challenged by having to ensure homeschooling responsibilities and then assesses how homeschooling affects different dimensions of parents' wellbeing. Analyzing data from a large general population-representative panel survey in Switzerland, we compare subjective wellbeing before the Covid-19-outbreak to wellbeing at the end of the semi-lockdown. Almost one fifth of parents report being sometimes overwhelmed by homeschooling obligations for their children. Women, mid-aged and lower-educated individuals as well as those with young children and a lower income are particularly overwhelmed. Being sometimes overwhelmed by homeschooling does not cause changes in life satisfaction, stress and negative affect. Yet, it leads to a decrease in positive affect. We derive recommendations for educational and public health policies.