The groups include Voice for Change in Jiwaka, along with KGWan Eco-Habitat Inc. and Independent Reform and Restoration Movement (IRRM) in Chimbu.
They will all become banking agents with MiBank, and expect to open accounts for more than 400 farmers.
IRRM Manager Toppy Sundu said in the past they never had bank accounts and had to hide their money or spend it.
"If we did have a bank account it took all day to travel to town to deposit or withdraw money. It would cost us money for PMV and was not safe," he said.