Self-Employed Retirement Plans Estimate the maximum contribution amount for a Self-Employed 401(k), SIMPLE IRA, or SEP. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content How Insurance Deductibles Work Knowing how insurance deductibles work can help you save money. Dreaming Up an Active Retirement When you retire, how will you treat your next chapter? Creative Ways to Motivate Your Employees Five creative (and inexpensive) ideas for motivating your employees.