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 Budgeting After a Divorce Divorce is the second most stressful time in a person's life. Here's some tips to get through it. Red Flags for Tax Auditors Here are six flags that may make your tax return prime for an IRS audit. Women and Financial Strategies Most women don’t shy away from the day-to-day financial decisions, but some may be leaving their future to chance.