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 Systematic Withdrawals in Retirement Taking regular, periodic withdrawals during retirement can be quite problematic. How Much Home Can I Afford? With a few simple inputs you can estimate how much of a mortgage you may be able to obtain. Tax Rules When Selling Your Home The tax rules governing profits you realize from the sale of your home have changed in recent years.