It’s not completely clear, but a provision on pages 49-52 of the House bill appears to require active owners of “S” corporations to allocate 70% of their flow-through income to ordinary tax rates, and subjects that amount to self-employment tax. In addition, “S” corporations that are personal service type businesses in the fields of healthcare, engineering, architecture, law, accounting, consulting, performing arts or actuaries would have to pay SE tax on 100% of flow-through income. The House bill also removes the limited partner exemption from self-employment tax.