Lloyds said 42% of firms experienced disrupted supplies or deliveries
The worst winter in decades has cost the UK's small and medium-sized companies (SMEs) about £7.3bn, a study has said.
With snow and ice hitting deliveries and causing firms to close up shop, 70% of SMEs said their trade was affected, said Lloyds TSB Commercial.
Of the 1,003 firms questioned, 23% said they were unaffected, and 7% said the cold weather had helped their trade.
Lloyds said Welsh companies suffered the most during the winter.
The study found that across the UK, 39% of SMEs were directly affected, which it determines as a company which was either forced to close its premises, or saw it cut off by snow or ice.
Meanwhile, 42% said they suffered indirectly through disrupted supplies or deliveries.
In addition, some said they experienced both a direct and indirect impact on their trade.
Businesses in Wales suffered the most direct impact - 59% - with those in the West Midlands the least affected - 30%.
"Businesses have faced a double blow over the past few months," said Stephen Pegge, head of external affairs for Lloyds TSB Commercial.
"They have had to grabble with the downturn in trade as a result of the recession, as well as the impact of the severe weather conditions."