Corporations can only use W-2 Income for contribution purposes.
S-Corporations 1065 (K-1) income is not considered earned income.
These results are based on general information enetered by the user. Additional assumptions may apply. Assitance of a tax advisor may be necessary to determine specific situations.
Assumptions used:

Plan operates on a calendar year
Maximum contribution includes combined Salary Deferral and Employer Contributions
Profit entered are less expenses
Employer is matching regular deferrals and not the catch-up contribition