Employer contributions are an expense of the S corp and have nothing to do with payroll. They are not wages and are not paid to the employee. They are not reported on the employee's W-2 or tax return, they are only reported on the S corp's tax return. A 25%-of-compensation profit-sharing contribution would be made in lieu of matching contributions, not in addition to matching contributions. The S-corp can't do both and must do the same for all eligible participants in the plan.
