Sales and profits have fallen at East of England Co-operative Society in the past six months.
Underlying trading profits fell 19% to £5.6m on sales down 6.1% to £180.5m.
Despite the decrease, the society said it would continue to invest in the business.
“We anticipated both difficult trading conditions and the dip in this year’s profits as the economic climate remains tough,” said East of England Co-op executive officer for finance and technology Doug Field.
“We remain focused on creating a modern, customer-focused society that is built on quality, profitability and social responsibility,” he added.