Making College Affordable Act of 2012 - Amends the Internal Revenue Code, with respect to Coverdell education savings accounts, to: (1) increase the age limit for beneficiaries of such accounts after which contributions may not be made from age 18 to age 26, (2) increase the maximum contribution limit in any taxable year from $2,000 to $10,000, and (3) allow an annual inflation adjustment to the increased contribution limit for taxable years beginning in a calendar year after 2012.