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 Taxable vs. Tax-Deferred Savings Use this calculator to compare the future value of investments with different tax consequences. Annuity Comparison This calculator compares a hypothetical fixed annuity with an account where the interest is taxed each year. Retirement Plan Detectives A couple become Retirement Plan Detectives, searching records from old employers.