### Question
How does PART 1—INCOME TAXES (CONTINUED) define full current costs?


### Answer
Under *26 CFR § 1.401-4*, **full current costs** is defined as:

> the normal cost, as defined in § 1.404(a)-6, for all years since the effective date of the plan, plus interest on any unfunded liability during such period.

#### Citation:
  - *26 CFR § 1.401-4*
  - Heading: **PART 1—INCOME TAXES (CONTINUED)**

