If you own an unincorporated small business, you may be frustrated with high self-employment (SE) tax bills. One way to lower your SE tax liability is to convert your business to an S corporation. SE tax basics Sole proprietorship income, as well as partnership income that flows through to partners (except certain limited partners), is subject to SE tax. These rules also apply to single-member LLCs that are treated as sole proprietorships for federal tax purposes and multi-member LLCs that are treated as partnerships for federal tax purposes. In 2025, the maximum federal SE tax rate of 15.3% hits the first $176,100 of net SE income. That includes 12.4% for the Social Security tax and 2.9% for the Medicare tax. Together, we’ll refer to them as federal employment taxes. The...

