To amend the Internal Revenue Code of 1986 to expand and modify the credit for employee health insurance expenses of small employers.

Small Business Tax Credit Accessibility Act This bill amends the Internal Revenue Code, with respect to the small employer health care insurance tax credit, to: (1) revise the definition of "eligible small employer" to mean an employer with not more than 50 (currently, 25) full-time employees; (2) modify the phaseout formula for such credit to base such phaseout on number of employees and average annual wages; (3) extend from two to three consecutive taxable years the period during which an employer may claim such credit; and (4) eliminate the requirement that employers contribute the same percentage of cost of each employee's health insurance and the cap limiting eligible employer contributions to average premiums paid to a state health insurance exchange.