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 Question Thank you! Oops! Related Content My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates. The Value of Insuring Against Life’s Risks Building wealth requires protection from the forces of wealth destruction. Best-Performing Asset Classes Bonds may outperform stocks one year only to have stocks rebound the next.