An organisation representing more than 400 charity shops around the country says its members are facing losses of up to €23 million this year.
The Irish Charity Shops Association says that closures during the Covid-19 pandemic in recent months came at a loss of €15m in sales.
The group expects continued restrictions around opening hours and social distancing will bring further losses of around another €8m.
Charity shops, like other retail outlets, were allowed to reopen their doors last Monday as Covid-19 restrictions are eased.