The SIU Credit Union is a business loan from SIU Credit Union. The ongoing APR is As low as: other titled new & used 8.00% APR (24-60 months), 9.00% (72 months); other non-titled new 9.74% (24-60), 10.74% (72); other non-titled used 10.74% (24-60). Loan terms: 24-72 months.