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 Home Mortgage Deduction Use this calculator to assess the potential benefits of a home mortgage deduction. Tax-Loss Harvesting: A Tax Strategy to Consider Not every investment will be a winner, but a strategy called tax-loss harvesting can potentially lower your tax bill. Estate Strategies of the Rich and Famous The examples of famous celebrities underline the need for a clear estate strategy.