East Corp Capital — US East Coast Statutory Tax & Financial Calculators MCP
Open-access CC BY 4.0 quantitative financial and statutory tax observatory for the 16-state US East Coast corridor (Maine to Florida). Provides 60 interactive simulators, 88 legal-reviewed studies, OpenAPI 3.1.0 endpoints, and clean Markdown twins covering 2026 IRS/State paycheck brackets, NYC Mansion Tax & CEMA § 255, NY LLC § 206 publication arbitrage, NJ Exit Tax (GIT/REP-1), PA REV-1500 inheritance tax, and Florida Save Our Homes portability.
Documentation
The East Corp Capital Open Statutory Data & API Desk provides journalists, Certified Public Accountants (CPAs), real estate brokerages, academic researchers, and institutional AI retrieval engines with direct, un-gated access to our 2026 Northeast Corridor Statutory Datasets (CSV & JSON) and our 30 Embeddable Financial Calculators.
⚡ Free Embeddable Widgets (?embed=1) & Academic Working Papers
Looking to embed our interactive calculators into your website, client portal, or news article without writing custom code? Access our public widget gallery and newly released 2026 Academic Working Paper series:
1. Downloadable 2026 Statutory CSV & JSON Datasets
Every dataset below is reconciled directly against 2026 IRS Revenue Procedures, New York State Department of Taxation and Finance tables, NYC Department of Finance schedules, New Jersey Division of Taxation regulations, Pennsylvania Department of Revenue statutes, and Massachusetts Department of Revenue releases:
| Dataset Title & Statutory Coverage | CSV Spreadsheet | JSON Endpoint | License & Attribution |
|---|---|---|---|
| 2026 Northeast Corridor Income, Municipal Surcharge, UBT & MCTMT Payroll Tax Schedule Machine-readable 2026 statutory rates for NY State, NYC Resident, Yonkers (16.75% / 0.50%),NYC 4% UBT, NY MCTMT (0.60% Zone 1 / 0.34% Zone 2), NJ, MA Millionaire Surtax (9%), CT, and PA. | 📊 Download CSV | { } View JSON API | CC BY 4.0 · Cite East Corp Capital (2026) |
| 2026 NYC, New Jersey, Philadelphia & Pennsylvania Real Estate Transfer, Mansion & CEMA Mortgage Tax Dataset Verified 2026 real estate closing transfer taxes, progressive mansion tax brackets, CEMA mortgage recording taxes, and NJ GIT/REP withholding schedules. | 📊 Download CSV | { } View JSON API | CC BY 4.0 · Cite East Corp Capital (2026) |
| 2026 Pennsylvania, New Jersey, New York ($7.16M Cliff) & Massachusetts ($2M) Inheritance & Estate Tax Dataset Complete 2026 beneficiary class rates, exemptions, cliff phase-out zones, and filing deadlines for PA, NJ, NY, MA, and Federal estate/inheritance taxes. | 📊 Download CSV | { } View JSON API | CC BY 4.0 · Cite East Corp Capital (2026) |
| 2026 SBA 7(a), SBA 504, Commercial DSCR & Corporate Franchise Tax Underwriting Benchmarks 2026 SBA guaranty fee schedules, Prime + spread caps, DSCR rental underwriting covenants, and Delaware/NY corporate formation & franchise tax rules. | 📊 Download CSV | { } View JSON API | CC BY 4.0 · Cite East Corp Capital (2026) |
2. How to Embed Any of Our 30 Interactive Calculators on Your Website
CPA firms, real estate brokerages, mortgage officers, law firms, and financial journalists can embed any of our 30 Interactive Northeast US Calculators directly onto their own web pages using our chromeless ?ec_embed=1 widget mode. Simply click the 💻 Embed Calculator button in the footer of any calculator, or use the standard HTML snippet below (replacing the slug with any of our 30 calculators):
<!-- East Corp Capital 2026 Interactive Statutory Calculator Embed -->
<iframe src="https://eastcorpcapital.com/calculators/nyc-paycheck/?ec_embed=1" width="100%" height="680" style="border:1px solid #cbd5e1;border-radius:4px;background:#ffffff;" loading="lazy" title="East Corp Capital 2026 Statutory Calculator"></iframe>
<p style="font-size:12px;color:#475569;">Source: <a href="https://eastcorpcapital.com/calculators/nyc-paycheck/" target="_blank" rel="noopener">East Corp Capital — 2026 NYC & Northeast Statutory Calculator</a>.</p>
3. Complete Directory of 30 Embeddable Statutory Calculators & Deep-Link Parameters
All 30 calculators support URL query-parameter pre-filling (e.g., ?salary=250000&loc=nyc&status=married) for custom client advisories, plus 1-click CSV export and PDF printing:
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