Special rules for simplified employee pensions

Employer contributions to a simplified employee pension shall be treated as if they are made to a plan subject to the requirements of this section. Employer contributions to a simplified employee pension are subject to the following limitations:

(A) Contributions made for a year are deductible— (i) in the case of a simplified employee pension maintained on a calendar year basis, for the taxable year with or within which the calendar year ends, or (ii) in the case of a simplified employee pension which is maintained on the basis of the taxable year of the employer, for such taxable year.

(B) Contributions shall be treated for purposes of this subsection as if they were made for a taxable year if such contributions are made on account of such taxable year and are made not later than the time prescribed by law for filing the return for such taxable year (including extensions thereof).

(C) The amount deductible in a taxable year for a simplified employee pension shall not exceed 25 percent of the compensation paid to the employees during the calendar year ending with or within the taxable year (or during the taxable year in the case of a taxable year described in subparagraph (A)(ii)). The excess of the amount contributed over the amount deductible for a taxable year shall be deductible in the succeeding taxable years in order of time, subject to the 25 percent limit of the preceding sentence.

For any taxable year for which the employer has a deduction under paragraph (1), the otherwise applicable limitations in subsection (a)(3)(A) shall be reduced by the amount of the allowable deductions under paragraph (1) with respect to participants in the trust subject to subsection (a)(3)(A).