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 Questions to Ask About Medicare Take the guesswork out of your IEP or SEP with this helpful article. A Look at Systematic Withdrawals This calculator may help you estimate how long funds may last given regular withdrawals. Paying Off a Credit Card Enter various payment options and determine how long it may take to pay off a credit card.