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 Question Thank you! Oops! Related Content Creative Ways to Motivate Your Employees Five creative (and inexpensive) ideas for motivating your employees. And the Executor Is The right executor may help ensure the distribution of your assets is done with as little upheaval as possible. Annuity Comparison This calculator compares a hypothetical fixed annuity with an account where the interest is taxed each year.