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 Buying Auto Insurance For Teen Drivers Tips on insuring your teen driver. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates. Understanding FDIC Insurance FDIC insurance was designed to protect your deposited funds, but do you know how? This article answers that question.