LLC vs S-Corp Election: Full Analysis
TaxKiln Editorial · Last reviewed:
An LLC taxed as an S-Corp pays its owner a W-2 reasonable salary subject to FICA, then distributes remaining profit free of self-employment tax. For 2026, the election typically becomes net-positive somewhere between $45,000 and $80,000 of net profit, depending on state surcharges, payroll-service cost, and the §199A QBI interaction. Below the breakeven, the added compliance cost exceeds the SE-tax savings.
TaxKiln framework
S-Election Breakeven Engine
TaxKiln's breakeven framework for the LLC-to-S-Corp election: models SE tax savings on owner distributions against added payroll cost (employer FICA on reasonable comp, federal/state unemployment, payroll-service fees, 1120-S preparation, state S-corp surcharges — CA 1.5% / IL PPRT / MA $456 / NYC GCT) and the QBI §199A interaction. Identifies the net-profit threshold above which Form 2553 is net-positive for the owner, including state-overlay break-evens.
How the S-Corp tax shield works
A default LLC owner pays 15.3% SE tax on all net profit up to the Social Security wage base, plus 2.9% Medicare above it (3.8% with the Additional Medicare surtax over $200k single / $250k MFJ). An S-Corp owner-employee splits net profit into two streams: a W-2 reasonable salary (subject to full FICA) and a distribution (no SE tax, no FICA). Only the salary portion bears employment tax — that is the entire mechanical benefit.
The cost side of the ledger
Against the SE savings, an S-Corp owner takes on: • Payroll service ($500–$1,200/year for a single-employee S-corp) • Separate 1120-S return preparation ($800–$2,500/year) • State franchise/surcharge tax (CA's $800 minimum + 1.5% net income tax; IL's 1.5% PPRT; MA's $456 minimum; NYC's 8.85% GCT for unincorporated business activity) • State unemployment insurance on owner wages (varies by state) • Owner reasonable comp must be defensible (Rev. Rul. 74-44; Watson v. Commissioner, 8th Cir. 2012)
The QBI haircut
Every dollar of owner W-2 wage reduces Qualified Business Income dollar-for-dollar. Below the §199A taxable-income threshold ($201,775 single / $403,550 MFJ in 2026), this is a pure haircut on the 20% deduction. Inside the phase-in band, higher W-2 wages may unlock the W-2 wage limitation and partially offset the loss — this is the QBI Optimiser stack interaction. Above the band for SSTB owners (consultants, lawyers, doctors, accountants), QBI is zero either way and the W-2 cost is pure deadweight against QBI.
Reasonable compensation in 8th Circuit terms
Watson v. Commissioner (8th Cir. 2012) and Glass Blocks Unlimited v. Commissioner (T.C. Memo 2013-180) establish that a salary too low relative to comparable wages, time worked, and business profit will be recharacterised — distributions get pulled back into wages and FICA assessed retroactively. The defensible methodology anchors on BLS OEWS median wages for the owner's SOC code, adjusted for region, hours, experience, and revenue band — see the BLS Reasonable-Comp Framework.
When to make Form 2553 election
Calendar-year LLCs must file Form 2553 by March 15 of the tax year to be effective for that year. Late elections may qualify for relief under Rev. Proc. 2013-30 if filed within 3 years and 75 days. Once elected, the S-Corp status continues until revoked (Form 8869 / written statement) or terminated by a disqualifying event (>100 shareholders, ineligible shareholder, second class of stock).
Worked example: Priya Shah, freelance SaaS consultant (Denver, CO)
Priya's single-member LLC nets $140,000 in 2026. She is single, has no other income, and consulting is an SSTB above the §199A threshold. Considering electing S-Corp status with $75,000 reasonable comp.
LLC default (Schedule C): Net SE profit: 140,000 × 0.9235 = 129,290 SE tax: 12.4% × 129,290 (under SS cap) + 2.9% × 129,290 = 16,032 + 3,749 = 19,781 Half-SE deduction: 9,890 S-Corp election ($75k W-2 comp): Owner FICA on $75k: 15.3% × 75,000 = 11,475 (employer half deductible to S-corp) Distribution $65,000 — no SE tax Total FICA cost: 11,475 vs LLC SE tax 19,781 Gross SE-tax savings: 8,306 Minus added costs: Payroll service: ~800 1120-S preparation: ~1,500 CO has no S-corp surcharge QBI haircut (Priya is in SSTB phase-out, so QBI is mostly gone either way; minor effect) Net benefit ≈ $5,800/yr. Election is net-positive at this profit level for Priya.
Statute references
- S-Corp election —
IRC §1362; Form 2553 - Reasonable compensation requirement —
Rev. Rul. 74-44; Watson v. Commissioner, 8th Cir. 2012 - Late S-election relief —
Rev. Proc. 2013-30 - QBI deduction interaction —
IRC §199A(c)(4)
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