Retirement Plan Simplification and Enhancement Act of 2012

[AI summary unavailable — showing source text] Retirement Plan Simplification and Enhancement Act of 2012 - Amends the Internal Revenue Code to repeal the 10% cap on the qualified percentage of an employee's compensation as the standard for an employer's contribution to an automatic cash or deferred contribution arrangement under the alternative method for meeting nondiscrimination requirements. Authorizes regulations to increase the qualified percentage. Revises the period of service requirements for a qualified cash or deferred arrangement to cover long-term part-time employees working at least 3 consecutive 12-month periods during each of which the employee has at least 500 hours of service. Requires separate application of the rules for a top-heavy defined benefit plan (whose the present value of the accrued benefits [PVAB] for the highly-paid key employees exceeds 60% of the PVAB for all employees) to any defined contribution plan covering part-time employees who do not meet age and service requirements. Increases from $500 to $1,500 the dollar limitation on the small employer pension plan startup cost tax credit for each of the first three credit years. Directs the Secretaries of the Treasury and of Labor to prescribe adm…