CDs are an insured savings alternative that has a fixed term and a fixed rate. Southwest Heritage Credit Union offers five different terms and the interest rate is based on the level invested. The minimum balance to open a certificate is $1,000. Interest is paid monthly. The penalty for early withdrawal is 90 days interest for 6 month and 12 month terms; 180 days interest for all other terms. Your Certificate of Deposit rate can be increased based on services you already have. Check out the savings rate page for more information.