LLC vs S-Corp in South Dakota

South Dakota has no state personal income tax and no state corporate income tax. South Dakota funds state operations primarily through sales tax, bank franchise tax on financial institutions, contractor's excise tax on construction gross receipts, and property tax. Verify current tax posture on the South Dakota Department of Revenue site (https://dor.sd.gov/) before relying. The South Dakota Secretary of State handles entity filing. The IRS handles the tax classification via Form 8832 and Form 2553. A South Dakota LLC can elect to be taxed as an S corporation. South Dakota LLC basics. - Articles of Organization filed online with the SD Secretary of State (https://www.sdsos.gov/) through the SOS Enterprise portal (https://sosenterprise.sd.gov/). The standard filing fee is $150 (verify current fee on the SOS schedule). - Annual report. Every South Dakota LLC must file an annual report with the SOS by the first day of the LLC's anniversary month. The annual report fee is modest. - Single-member LLCs default to disregarded entity for federal tax. Multi-member LLCs default to partnership tax. Either can elect S corp treatment with IRS Form 2553. - No South Dakota corporate income tax; no personal income tax; no franchise tax on non-bank LLCs beyond the annual report. South Dakota S corp basics. - South Dakota recognizes the federal S election. At the state level, there is no S corp income tax return in South Dakota because there is no state income tax. An S corporation operating in South Dakota files federal Form 1120S and issues K-1s to shareholders, who report the income on their home-state personal returns (or no state return if they are South Dakota residents). - Payroll. An S corp must pay its owner-employee a reasonable W-2 salary. South Dakota imposes state unemployment insurance (UI) tax through the Department of Labor and Regulation once the business crosses the wage threshold. Why a South Dakota trades shop might elect S corp. The main driver is federal self-employment tax savings. Since South Dakota has no state income tax, the state-tax side is zero for both LLC and S corp. A disregarded-entity LLC owner pays self-employment tax on the full net profit. An S corp owner-employee pays payroll tax on wages only; the distribution portion avoids self-employment tax. The federal payroll-tax math is the entire decision in South Dakota. Contractor's Excise Tax. Beyond the LLC/S-corp decision, South Dakota construction contractors must register for and pay the 2 percent Contractor's Excise Tax on gross receipts under SDCL 10-46A. This tax applies regardless of entity type. Source: SD Department of Revenue (https://dor.sd.gov/). Rule of thumb. Start as an SD LLC. When annual profit after a reasonable owner wage is high enough that payroll tax savings clear the payroll, retirement plan, and accounting costs, elect S corp. A CPA with South Dakota construction clients can run the breakeven for your numbers and confirm the SD filings, annual report schedule, Contractor's Excise Tax registration, and SD Electrical / Plumbing Commission license-holder requirements for the entity you choose.