S-Corp Election and Entity Tax Planning

The choice between sole proprietorship, LLC, S-corp, and C-corp dramatically affects your overall tax burden. This guide explains the trade-offs and when each structure makes sense.

S-corp election is the most common lever. If your side business or consulting practice generates significant net profit, electing S-corp status lets you split income between a reasonable salary (subject to FICA) and distributions (not subject to self-employment tax). The IRS requires the salary to be comparable to what you would earn performing the same work for someone else, so the split must be defensible.

Holding companies add a layer for investors. If you own rental properties or investment portfolios, a holding LLC can provide liability protection and, depending on your state, tax advantages. Some states (like California) impose franchise taxes on LLCs that make entity formation costly for small portfolios.

Professional LLC rules vary by state. Doctors, lawyers, accountants, and other licensed professionals often must use a Professional LLC (PLLC) or Professional Corporation (PC). The entity choice affects self-employment tax treatment, liability protection, and retirement plan options differently in each state.

State tax implications drive the decision. An entity that saves federal taxes may trigger state-level entity taxes, franchise fees, or composite filing requirements. A CPA models the combined federal and state impact before recommending a structure.

The tradeoff: Every entity adds compliance costs -- separate tax returns, registered agent fees, annual filings, and potentially separate payroll. The tax savings must exceed these ongoing costs to justify the structure.