Entire interest. For purposes of applying the rules in 1.401(a)(9)-5, the entire interest under the annuity contract as of December 31 of the relevant valuation calendar year is treated as the account balance for the valuation calendar year described in A-3 of 1.401(a)(9)-5. The entire interest under an annuity contract is the dollar amount credited to the employee or beneficiary under the contract plus the actuarial present value of any additional benefits (such as survivor benefits in excess of the dollar amount credited to the employee or beneficiary) that will be provided under the contract. However, paragraph (c) of this A-12 describes certain additional benefits that may be disregarded in determining the employee's entire interest under the annuity contract. The actuarial present value of any additional benefits described under this A-12 is to be determined using reasonable actuarial assumptions, including reasonable assumptions as to future distributions, and without regard to an individual's health.