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 How Insurance Deductibles Work Knowing how insurance deductibles work can help you save money. Questions to Ask About Medicare Take the guesswork out of your IEP or SEP with this helpful article. Saving for College 101 Here’s a crash course on saving for college.