You can’t get approval for your own credit card as a minor. For applicants younger than 21 years old, the Credit CARD Act of 2009 requires proof of independent income or a parent or guardian cosigner. Credit card applications also ask for your annual income, so you must have an income source or access to one. If you don’t have an independent source of income, you may list your parent’s, guardian's or partner’s income as long as you have “reasonable expectation of access,” like having a shared bank account.