(1) If a plan to which this section applies provides that any portion of the accident or health benefits is attributable to the contributions of the employee to such plan, then such portion of such benefits is excludable from gross income under section 104(a)(3) and paragraph (d) of § 1.104-1. Neither section 72 nor section 105 applies to any accident or health benefits (whether paid before or after retirement) attributable to contributions of the employee. Since such portion is excludable under section 104(a)(3), such portion is not subject to the dollar limitation of section 105(d) and if such portion is payable after the retirement of the employee, it is excludable without regard to the provisions of § 1.105-4 and section 72.

(2) In determining the taxation of any amounts received as accident or health benefits from a plan to which this section applies, the first step is to determine the portion, if any, of the contributions of the employee which is used to provide the accident or health benefits and the portion of the accident or health benefits attributable to such portion of the employee's contributions. If such a plan expressly provides that the accident or health benefits are provided in whole or in part by employee contributions and the portion of employee contributions to be used for such purpose, the contributions so used will be treated as used to provide accident or health benefits. However, if the plan does not expressly provide that the accident or health benefits are to be provided with employee contributions and the portion of employee contributions to be used for such purpose, it will be presumed that none of the employee contributions is used to provide such benefits. Thus, in the case of a contributory pension plan, it will be presumed that the disability pension is provided by employer contributions, unless the plan expressly provides otherwise, or in the case of a contributory profit-sharing plan providing that a portion of the amount standing to the account of each participant will be used to purchase accident or health insurance, it will be presumed that such insurance is purchased with employer contributions, unless the plan expressly provides otherwise. Similarly, unless the plan expressly provides otherwise, it will be presumed that if a contributory profit-sharing plan provides for periodic distributions from the account of a participant during any absence from work because of a personal injury or sickness, all such distributions which do not exceed the contributions of the employer plus earnings thereon are provided by employer contributions.

(3) Any employee contributions that are treated under subparagraph (2) of this paragraph as used to provide accident or health benefits shall not be included for any purpose under section 72 as employee contributions or as aggregate premiums or other consideration paid. Thus, in the case of a pension plan, or in the case of a profit-sharing plan providing that a portion of the amount standing to the account of each participant will be used to purchase accident or health insurance, any employee whose contributions are so used must make the adjustment provided by this subparagraph irrespective of whether such employee receives any accident or health benefits under such plan. However, in the case of a profit-sharing plan providing for periodic distributions from the account of a participant during any absence from work because of a personal injury or sickness, an adjustment under this subparagraph is required only when an employee receives distributions in excess of the employer contributions and earnings thereon or receives distributions consisting in whole or in part of his own contributions.

(4) If any of the employee contributions are treated under subparagraph (2) of this paragraph as used to provide any of the accident or health benefits, the portion of the benefits attributable to employee contributions shall be determined in accordance with § 1.105-1. Any accident or health benefits that are excludable under section 104(a)(3) shall not be included in the expected return for purposes of section 72.

(1) In general. For purposes of section 72(b) and (d) and this section, the taxpayer must maintain such records as are necessary to substantiate the amount treated as an investment in the taxpayer's annuity contract.

(2) Delegation to Commissioner. The Commissioner may prescribe a form and instructions with respect to the taxpayer's past and current treatment of amounts received under section 72 or 105, and the taxpayer's computation, or recomputation, of the taxpayer's investment in his or her annuity contract. This form may be required to be filed with the taxpayer's returns for years in which the amounts are excluded under section 72 or 105.