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 Teen Drinking and Your Liability Drinking may be a “rite of passage” for teens, but when it occurs in your home you may be held responsible for their actions. Can I Refinance My Mortgage? This calculator can help determine whether it makes sense to refinance your mortgage. Retirement Questions That Have Nothing to Do With Money Things to consider before retirement.