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 Coaches Coaches have helped you your whole life, in ways big and small. We'd like to be one of them. Estimate Your RMD Help determine the required minimum distribution from an IRA or other qualified retirement plan. How Much Home Can I Afford? With a few simple inputs you can estimate how much of a mortgage you may be able to obtain.