Yes, the Bank of America Custom Cash Secured Card reports to all major credit bureaus, Transunion, Experian, and Equifax. It will do so in a few days after the closing date of each cardholder's billing cycle.
This means that the Bank of America Custom Cash Secured Card can help you build credit as long as you use it responsibly. Just try to stay well below your credit limit, and always pay your bills in time and preferably in full.