How I Built a Zero-Dependency, 100% Client-Side 50-State US LLC vs. S-Corp Tax Calculator (2026 IRS Rules)

说明与用途

构建了一个完全客户端、无依赖的 2026 年美国 LLC 与 S‑Corp 税务计算器，涵盖所有 50 个州和详细的法定规则。

问题

Most financial calculators on the web are bloated with third‑party tracking scripts, require email signups to view results, or oversimplify the US Internal Revenue Code by ignoring the Section 199A QBI deduction and state‑level S‑Corp surtaxes.

结果

The resulting tool provides fast, privacy‑respecting, and accurate tax comparisons for LLCs vs. S‑Corporations across all 50 states, including detailed statutory guidance and state‑specific calculators.

工作流

• 1. Built the application using pre‑compiled production CSS and a native High‑DPI HTML5 <canvas> stacked bar chart engine.
• 2. Implemented a verified 2026 IRS statutory engine covering Social Security cap, Medicare surtaxes, standard deductions, and Section 199A QBI interaction.
• 3. Created 50 pre‑rendered state calculators and 10‑section statutory guides for state‑level tax details.
• 4. Deployed the app as a fully client‑side web application with no external blocking JS runtime.
• 5. Offered an embed widget for other sites to use the calculator.
• 6. Made the calculator available at https://blacklink.in/ and provided free CPA & Partner Calculator Widget for embedding.

证据

Most financial calculators on the web are bloated with third‑party tracking scripts, require email signups to view results, or oversimplify the US Internal Revenue Code by ignoring the Section 199A QBI deduction and state-level S‑Corp surtaxes.

来源

CorpTaxIQ (blacklink.in) — a fast, zero‑dependency, 100% client‑side web application that models 2026 US Single‑Member LLC vs. S‑Corporation taxes, IRS Form 1040‑ES quarterly vouchers, Solo 401(k) tax shields, and commercial insurance costs across all 50 US states.

来源

Zero External Blocking JS Runtime: Instead of loading runtime CSS compilers or 200KB charting libraries, the app uses pre‑compiled production CSS and a native High‑DPI HTML5 <canvas> stacked bar chart engine (<code>window.devicePixelRatio</code> scaled) that renders in <code><1ms</code>.

来源

Verified 2026 IRS Statutory Engine: 2026 Social Security (OASDI) Cap: $184,500 (12.4% tax + uncapped 2.9% Medicare + 0.9% Additional Medicare surtax.

来源

50 Pre‑Rendered State Calculators & 10-Section Statutory Guides: California LLC vs. S-Corp Calculator ($800 FTB Fee + 1.5% Surtax)

来源