I would agree with you, Scott, that it
is the employer's responsibility to make at least some attempt to ensure that the MEA calculations are correct. In its recent audits of 403(B) plans, the IRS has typically imposed liability on employers for withholding taxes in the case of 403(B) plan defects or overexclusion, rather than go after the employees.
The question then becomes how hard the employer has to work to ensure the information it gets is accurate. Most employers are not in a position to double-check every statement the employee makes, even though typically information from other employers is not necessary to perform the MEA calculations. However, some information (such as what elections an employee has made in past years) is available only to the employee.
Our firm has typically recommended a two-part approach to this. First, the employer requires the employee, as a condition of participation, to supply all information necessary to make the calculations, and to certify that it is true. Second, the employer permits a carrier to sell contracts only if it certifies both that the contract it sells is a 403(B) contract and that the amount to be contributed to it is within IRS limits. Depending on the size and administrative facilities of the employer, it may want to check MEA calculations, or at least a random sampling of them.
However, the problem is not as intractable as it may at first appear. Most employees who have more than a few years of service have limits under 415© and/or 402(g) which are smaller than the MEA limit in any event. And of course, the 415© and 402(g) limits are typically much easier to calculate than the MEA limit.
Moreover, although theoretically the IRS could impose withholding taxes on the employer even in the case of an innocent error, IRS representatives have stated informally that they would not do that if the employer had taken reasonable precautions to guard against overexclusion, and made a mistake based on an employee error.
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