# 1099 vs W-2 Equalizer (2026 Tax Year)
> **Specification Version:** 2026.2 | **Last Updated:** 2026-09-03  
> Autonomous, 100% in-browser financial scenario compute engine calculating required 1099 gross billing rates to match any salaried W-2 target take-home pay and total economic compensation.

## Core Statutory Parameters (2026 Tax Year)
- **Federal Tax Brackets:** 10%, 12%, 22%, 24%, 32%, 35%, 37% (IRS Rev. Proc. 2025-32 / 2026 parameters).
- **Standard Deduction:** $16,100 (Single) / $32,200 (MFJ) / $24,150 (HOH).
- **FICA Social Security Wage Cap:** $184,500 (6.2% W-2 employee / 12.4% self-employed SECA).
- **Medicare Tax:** 1.45% W-2 / 2.9% self-employed (uncapped).
- **Additional Medicare Tax:** 0.9% above statutory thresholds ($200,000 Single / $250,000 MFJ / $125,000 MFS). Note: Scenario model calculates tax on isolated earnings; Form 8959 aggregates total household wages and SE income.
- **Self-Employment Tax Base:** 15.3% computed on 92.35% Schedule SE net profit, with 50% above-the-line deduction on Form 1040 Schedule 1.
- **Section 199A QBI Deduction:** Up to 20% pass-through deduction on eligible net business profit; SSTB phaseout bounds $203,300–$253,300 (Single) / $406,600–$506,600 (MFJ). Note: Simplified scenario estimate under Rev. Proc. 2025-32; does not compute Form 8995-A W-2/UBIA caps. State conformity varies (California and New York do not conform to Section 199A).
- **State Tax Rules (50 States + DC):** California 1.3% uncapped employee SDI withholding (CA EDD SB 951) and S-Corp $800 min franchise tax; Washington 1.5% B&O service gross receipts tax; New York progressive state tax + up to 3.876% NYC resident tax; Texas and Florida 0% personal income tax.

## Algorithmic Model & Parity Formulation
- **Reverse Solver:** Deterministic monotonic binary search converging with algorithmic absolute error <= $0.50. Display layer: Billed gross at 2-decimal rounded rate has bounded cent variance <= 0.005 * annual hours (<= $9.60/yr at 1,920h).
- **Spendable Cash Parity:** Solves for the 1099 hourly rate where net cash take-home matches W-2 net take-home plus out-of-pocket health and 401(k) match replacement. Unbillable time off (e.g. 48 billable weeks = 4 weeks off) is naturally priced through the reduced billing hour divisor without charging phantom PTO cash twice.
- **Total Economic Parity:** Informational ledger metric incorporating imputed PTO cash value for full employer compensation package comparison.

## Primary Authoritative Sources
- Internal Revenue Service (IRS): Publication 15 (Circular E), Form 1040 Schedule C/SE, Form 8995-A (QBI), Rev. Proc. 2025-32.
- Social Security Administration (SSA): 2026 OASDI Maximum Taxable Earnings Bulletin ($184,500).
- State Revenue Departments: California FTB & EDD, Washington Department of Revenue, New York Department of Taxation and Finance, Texas Comptroller, Florida Department of Revenue.

## Canonical Endpoints & Interfaces
- **Web Application:** `https://true1099.com` (Interactive cockpit & 50-state scenario navigator).
- **Tax Math & Methodology:** `https://true1099.com/methodology` (Rigorous mathematical derivations, IRC citations, and proofs).
- **Embeddable Rate Widget:** `https://true1099.com/embed` (Clean, responsive, zero-cookie iframe calculator for blogs and communities).
- **S-Corp Tax Optimizer:** `https://true1099.com/s-corp-calculator` (Reasonable compensation and distribution tax modeling).
- **State Hubs:** `https://true1099.com/[state]` (51 state and territory statutory hubs).
- **State Benchmark Ledgers:** `https://true1099.com/[state]/1099-vs-w2-[salary]-equivalent` (Deep parity calculation breakdown).

## Legal Disclaimer & Limitations
This software produces educational scenario estimates and does not constitute formal tax, legal, or accounting advice (IRS Circular 230). S-Corporation reasonable compensation is determined on individual facts and circumstances (Rev. Rul. 59-221, Rev. Rul. 74-44, David E. Watson, P.C. v. United States); the 60% baseline is an illustrative industry scenario, not an IRS safe harbor.