Description: Financing a defined benefit pension plan can be accomplished in various ways. With the help of a one-life example, this paper gives an elementary actuarial perspective of the problems that arise when a new defined benefit pension plan is initiated, and of the various actuarial concepts and methods developed to ascertain the cost of these pension benefits. The paper shows the range of the cost alternatives conceptually available upon creation of the pension plan. Actuarial formulas are provided in footnotes. The paper is intended as an introduction to defined benefit pension cost determination as well as an elementary example which may be of value in explaining cost alternatives to an actuary's client. From Transactions of Society of Actuaries 1975, Vol. 27.