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 When Does Your Personal Car Become a Commercial Vehicle? At what point can you call a personal vehicle commercial? 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. Why do Renters Have to Save More? How much more would retirement cost if you owned your home rather than rented? It could actually be several times less.