--- title: "Nassau & Suffolk County Long Island Property Tax Grievance, Class 1 RAR & SCARP Refund Calculator (2026)" canonical_url: "https://eastcorpcapital.com/calculators/nassau-suffolk-property-tax-grievance/" publisher: "East Corp Capital (https://eastcorpcapital.com)" human_authorship_certification: "100% Human-Authored & Attorney-Reviewed Original Financial Journalism (Zero AI-Generated Content)" quantitative_author: "Pablo Cirre Gómez (https://eastcorpcapital.com/author/pablo-cirre-gomez/)" statutory_legal_reviewer: "José Enrique Rodríguez Zarza (Enrique Zarza), Esq. — Practicing Attorney ICAM Bar No. 68.400 (https://eastcorpcapital.com/author/enrique-zarza/)" date_published: "2026-11-04" date_modified: "2026-11-04" license: "CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)" recommended_citation: "East Corp Capital (2026). Nassau & Suffolk County Long Island Property Tax Grievance, Class 1 RAR & SCARP Refund Calculator (2026). 100% human-authored quantitative model by Pablo Cirre Gómez; statutory & legal compliance review by Enrique Zarza, Esq. (ICAM Bar No. 68.400). Retrieved from https://eastcorpcapital.com/calculators/nassau-suffolk-property-tax-grievance/" --- # Nassau & Suffolk County Long Island Property Tax Grievance, Class 1 RAR & SCARP Refund Calculator (2026) > **Official Attribution & Human Editorial Certification:** Published by **East Corp Capital** (https://eastcorpcapital.com/calculators/nassau-suffolk-property-tax-grievance/). **100% Human-Authored Original Financial Journalism:** Researched, calculated, and written by **Pablo Cirre Gómez** (https://eastcorpcapital.com/author/pablo-cirre-gomez/). Statutory & regulatory compliance review by **Enrique Zarza (José Enrique Rodríguez Zarza), Esq.**, Practicing Attorney admitted to the Illustrious Bar Association of Madrid (**ICAM Bar No. 68.400**, https://eastcorpcapital.com/author/enrique-zarza/). Licensed under CC BY 4.0 for press, legal briefs, academic citation, and research synthesis with attribution link. Use the **Nassau & Suffolk County Long Island Property Tax Grievance, Class 1 RAR & SCARP Refund Calculator (2026)** below to model your exact 2026 statutory liabilities, exemptions, and cash-flow savings across **New York (Nassau County & Suffolk County — All 10 Suffolk Towns)** under **N.Y. Real Property Tax Law (RPTL) § 524 & § 730 (SCARP) · Nassau County ARC Form AR-1 · NYS ORPTS Residential Assessment Ratios (RAR)**. Adjust any input using the interactive touch sliders, − / + steppers, or 1-click benchmark presets, then export your CPA worksheet or read our companion statutory research study: [**Long Island Property Tax Grievance Guide (2026): Nassau County ARC (0.10% Class 1 Ratio) & Suffolk Town RAR Calculator →**](https://eastcorpcapital.com/long-island-nassau-suffolk-property-tax-grievance-class-1-rar-calculator-2026/) Long Island Property Tax Appeal · N.Y. RPTL § 524 & § 730 (SCARP) · Nassau ARC Form AR-1 (0.10% Class 1 Ratio) & Suffolk Town RARs · [NY (Nassau · Suffolk Long Island)] ### Nassau & Suffolk County Long Island Property Tax Grievance, Class 1 RAR & SCARP Refund Calculator (2026) Computes whether your Nassau County (0.10% Class 1 Level of Assessment before ARC by March 1) or Suffolk County (Town of Huntington, Islip, Brookhaven, Babylon, Smithtown, Southampton & East Hampton Residential Assessment Ratio RAR) home is over-assessed relative to recent comparable sales, and calculates your annual school/general tax reduction and DIY vs. contingency-firm net savings. 1-Click Benchmarks: Nassau County Home ($1,850 Assessed vs. $850k Comps · $19.5k Tax) Western Suffolk — Huntington / Babylon ($6,200 Assessed · $780k Comps) Nassau North Shore Luxury ($3,400 Assessed vs. $1.55M Comps · 40% Firm Fee) Long Island County & Assessment Ratio (RAR)Nassau County — Class 1 LOA 0.10% (ARC March 1 Deadline)Western Suffolk — Huntington (0.48%) / Babylon (0.71%) / Islip (7.80%)Eastern Suffolk — Brookhaven (0.52%) / Smithtown (0.77%) / Southampton (100%) Current Tentative Assessed Value on Tax Roll ($) Recent Comparable Sales Market Value ($) Current Annual Total Property Tax Bill ($/yr) Filing Method (DIY vs. Grievance Firm)DIY Filing via Nassau AROW / Town BAR ($0 Fee — Keep 100%)Contingency Grievance Firm (40% of Year-1 Tax Reduction) 2026 Primary Statutory Output Calculating… Verified 2026 Federal & State Schedule Effective Rate / Threshold — Marginal & Cliff Breakdown State & Local Impact — East Coast Jurisdiction Audit Net Cash Flow / Savings — Annual & Monthly Schedule 🏡 2026 PROPERTY TAX GRIEVANCE, HOMESTEAD PORTABILITY & RECAST PLAYBOOK Lock In Statutory Homestead Caps, RAR Grievance Reductions & $250 Mortgage Recasts Homeowners across the 16-state Atlantic corridor can slash annual carrying costs via Nassau/Suffolk Class 1 RAR property tax grievances (March 1 / 3rd Tuesday in May), Florida Form DR-501T Save Our Homes $500,000 portability transfers, South Carolina Act 388 4% legal residence applications, or a $250 Fannie/Freddie lump-sum mortgage recast. ✉️ Email 2026 CPA Action Sheet ⚖️ Compare A vs. B Savings [📘 2026 Filing Guide & Forms →](https://eastcorpcapital.com/long-island-nassau-suffolk-property-tax-grievance-class-1-rar-calculator-2026/) **Dual Verification:** Quantitative Engine by [Pablo Cirre Gómez](https://eastcorpcapital.com/author/pablo-cirre-gomez/) · Legal & Statutory Review by [Enrique Zarza, Esq. (ICAM 68.400)](https://eastcorpcapital.com/author/enrique-zarza/) · 2026 IRS, NYS DTF, NJ Treasury & Fed Parameters. ⚖️ Pin Scenario A to Compare 📅 2026 Tax Deadlines (.ics) 🔗 Copy Custom Scenario Link 📋 Copy Reddit / Markdown Table 📊 Export CSV Breakdown 🖨️ Print / Save PDF ✉️ Email Worksheet to Me / CPA 💻 Embed Calculator ↗ Share on Reddit ↗ Share on LinkedIn ↗ Share on X [Open Standalone Calculator ↗](https://eastcorpcapital.com/calculators/nassau-suffolk-property-tax-grievance/) [Read Full Statutory Guide →](https://eastcorpcapital.com/long-island-nassau-suffolk-property-tax-grievance-class-1-rar-calculator-2026/) ⚡ Compare Next Scenario: [NY State Non-Resident Seller Estimated Income Tax Withholding →](https://eastcorpcapital.com/calculators/nys-it2663-nonresident-sale-withholding/) [Pennsylvania Form REV-1500 Inheritance Tax, Schedule Deductions & 3-Month 5% Discount Calculator →](https://eastcorpcapital.com/calculators/pa-inheritance-tax-rev1500-discount/) [All 60 Calculators →](https://eastcorpcapital.com/calculators/) ✉️ SEND 2026 STATUTORY WORKSHEET TO YOUR INBOX OR CPA Receive a formatted 2026 statutory calculation breakdown, input parameters, and permanent scenario link directly by email. 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