What is BOSA (Back Office Service Activity)?
BOSA, or Back Office Service Activity, is the original SACCO function: members build up deposits through regular contributions, those deposits determine how much each member can borrow, loans are advanced against them and are commonly guaranteed by other members, and any surplus is distributed to members. BOSA deposits are not a current account and are not designed to be moved in and out at will.
A real Kenyan example
A member contributing monthly to BOSA over four years builds a deposit balance that supports a loan of several times that balance, subject to the SACCO's own multiplier.
Why it matters
Understanding that BOSA money is structural rather than spendable prevents the most common disappointment new members report. Accessing BOSA deposits usually means reducing or ending your membership position, often with notice, rather than making a withdrawal.