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 Annuity Comparison This calculator compares a hypothetical fixed annuity with an account where the interest is taxed each year. Understanding the Alternate Valuation Date Executors can value the estate on the date of death, or on its six-month anniversary —the “Alternate Valuation Date." Disability and Your Finances In the event of an unforeseen accident or illness, disability insurance may be a good way to protect your income and savings.