A benefit plan that is similar to a defined benefit plan since contributions are based on projected retirement benefits. However, unlike a defined benefit plan, the benefits provided to participants at retirement are based on the performance of the investments, and are therefore not guaranteed.
The target benefit plan also bears some similarity to a money purchase plan as contributions are mandatory. Generally speaking, a target benefit plan is a cross between a money purchase pension plan and a defined benefit plan.
Definition courtesy of Investopedia