Cooperative financial institutions are believed to be less vulnerable to business and economic fluctuations linked to recessions and crises. This paper examines the short-term effects of Covid-19 on the British credit union sector drawing on survey data for 58 credit unions and follow-up interviews with 21 credit union managers. Loan demand, and the volume and value of loans were significantly lower in March and April 2020 after the introduction of government restrictions than in March and April 2019. Bad debt provisioning was also significantly higher in April 2020 than in April 2019. There was no significant difference for loan interest income between April 2019 and April 2020. The findings suggest that credit unions were affected by the pandemic in the same way as other financial institutions. For the majority of the credit unions, the decline in lending may be explained by a drop in consumer demand rather than restrictions put on the supply of credit. It is too early to conclude if the adverse economic conditions caused by Covid-19 will negatively affect the sustainability and ability of the sector to generate surpluses or if the cooperative model will shield the sector from resulting economic fluctuations, as suggested by the literature.