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 Monthly Memberships A look as how autopay subscriptions can be a drain on your finances, especially when forgotten. Catch-Up Contributions Workers 50+ may make contributions to their qualified retirement plans above the limits imposed on younger workers. Risk Perspective Is it possible to avoid loss? Not entirely, but you can attempt to manage risk.