The individual 401(k) plan is a type of 401(k) plan, as the name denotes, designed specifically for owner-only coverage. While you’ll find these plans marketed under a number of different names (Individual(k), Uni-K, Solo-K, Owner-Only 401(k)), the common characteristic is that these names are used to denote a 401(k) product that is designed specifically for the “owner-only” market.