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 Budget Check Up: Tax Time Is the Right Time Tax preparation may be the perfect time to give the household budget a check-up. Asset Allocation Consider how your assets are allocated and if that allocation is consistent with your time frame and risk tolerance. How Will Working Affect Social Security Benefits? Knowing the rules may help you decide when to start benefits.