Exercise 19-14 (Algorithmic) (LO. 5) Zack, a sole proprietor, has earned income of $85,205 in 2021 (after the deduction for one-half of self-employment tax). What is the maximum contribution Zack may make to a defined contribution Keogh plan? 21,301.25 X Feedback Check My Work Self-employed individuals (e.g., partners and sole proprietors) and their employees are eligible to receive qualified retire under the SIMPLE plans or under what are known as H.R. 10 (Keogh) plans. A variety of funding vehicles can be used fo Investments, such as mutual funds, annuities, real estate shares, certificates of deposit, debt instruments, commodities, personal properties.