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 Historical Inflation This calculator shows how inflation over the years has impacted purchasing power. Disability Income This calculator estimates your chances of becoming disabled and your potential need for disability insurance. Coaches Coaches have helped you your whole life, in ways big and small. We'd like to be one of them.