Small Business Fairness in Obamacare Act - Amends the Internal Revenue Code, as amended by the Patient Protection and Affordable Care Act (PPACA), to: (1) exempt a small business concern, as defined by the Small Business Act, from the PPACA employer mandate to provide employees with minimum essential health care coverage; and (2) redefine "full-time employee," for purposes of such mandate, as an employee who is employed on average at least 40 (currently, 30) hours a week.