The Frankenmuth Credit Union is a mortgage from Frankenmuth Credit Union. The ongoing APR is as low as 7.000% APR (10 and 15 Year Fixed), 7.125% (20 and 30 Year Fixed); rate based on $150K loan amount, 30 day lock (effective October 23, 2026). Loan terms: 10, 15, 20 or 30 year fixed terms.