The MERCO Credit Union is a personal credit card from MERCO Credit Union. The annual fee is No annual fee. Signup bonus: 2,500 bonus points when you open your new Member Cash Preferred Visa®. Rewards: 2.5% Cash Back. Loan terms: Due date is at least 25 days after the close of each billing cycle; minimum payment is 3% of Total New Balance or $25, whichever is greater.