2025 Tax Bills Now Available Online
New Castle County has released the official 2025 tax bills. You can now view your property's tax bill online, including the new bill dated 11/17/2025.
Find out how the New Castle CountyReassessment + Split School RatesImpacted Your Property
Not affiliated with the State of Delaware or New Castle County (NCC).
NCC Parcel Search & Property Tax Impact Map
Interactive NCC parcel search map showing New Castle County reassessment impacts across all 215,000+ properties. Red areas show tax increases, green areas show decreases from the reassessment.
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Video Guides
Watch step-by-step tutorials and explanations to help you navigate the tax reassessment process
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How to Split Your New Castle County School Tax Bill Into 3 Payments
If your school tax bill increased by at least $300 from last year and the property is your primary residence, you may qualify to have your bill split into three separate payments. This video walks you through the process from start to finish.
Tax Bill Refunds & Do You Need to Pay If You Have a Mortgage?
Learn how to request a refund if you overpaid your taxes, and understand whether you need to pay your tax bill if you have a mortgage (spoiler: you don't - your mortgage company pays it).
More Videos Coming Soon
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SubscribeLatest Updates
New resources and analysis to help you navigate the New Castle County property tax situation
2025 Tax Bills & Refund Process
Official tax bills released - request a refund if you overpaid
New Castle County has released the official 2025 tax bills dated November 17, 2025. If you overpaid by more than $50, you can now request a refund online. Check your bill for a negative amount and "Overpayment" to see if you qualify.
Tax Payment Plans Available
Need more time to pay? Request a 3-installment payment plan
If your tax bill increased by $300+ and you no longer have a mortgage or have a reverse mortgage, you can request a penalty-free payment plan. Pay your school taxes in 3 equal installments with no additional fees or interest under House Bill 241.
Legislative Investigation
Special committees investigating the reassessment process
Joint House and Senate committees are conducting public hearings through November 2025 to examine the reassessment process and develop recommendations. First hearing: September 30, 2025 with Tyler Technologies presenting.
House Bill 242 Legal Challenge
Court upholds HB-242 as constitutional - October 30, 2025
The Delaware Court of Chancery ruled in favor of all defendants, rejecting all six constitutional challenges to House Bill 242. Vice Chancellor Lori Will's 58-page opinion upholds the dual tax rate system, allowing New Castle County to proceed with issuing supplemental school tax bills for the 2025-2026 year.
2025 School District Tax Rates
Complete breakdown of split rates across all five districts
All New Castle County school districts now use split rate systems following House Bill 242. Compare residential and commercial rates for Brandywine, Colonial, Red Clay, Christina, and Appoquinimink districts, plus NCC VoTech rates.
Property Assessment Appeals
Complete guide to challenging your property assessment
Step-by-step guide to filing an appeal with the Board of Assessment Review (BOAR). Learn what evidence is required, understand the process timeline, and get answers to the most common questions about challenging your assessment.
Tyler Technologies Report
Official reassessment methodology and findings
Comprehensive analysis of Tyler Technologies' official mass appraisal report. Understand the methodology behind the reassessment of 214,788 properties worth $120.06 billion, including limitations and performance standards.
Complete Tax Relief Guide
Eight comprehensive relief programs for New Castle County residents
From senior citizen credits to disabled veteran benefits, we've compiled every available tax relief program in one comprehensive guide. Includes application deadlines, eligibility requirements, and potential savings for each program.
Business Tax Impact Analysis
Discover how the reassessment and split school rates affected businesses across New Castle County. Search by company name to see the complete tax impact for any business owner.
Commercial Winners
Major businesses like Amazon, DuPont, and Chase Bank saved millions through split school tax rates and reassessment adjustments.
Top reduction: $2.1M+ in annual savings
Most Impacted
Some commercial properties faced significant increases, with businesses like Christiana Mall seeing major tax bill changes.
Largest increase: $1.6M+ in additional taxes
Search any business name to see all their properties, total tax changes, and individual property impacts. Perfect for understanding how the reassessment affected entire business portfolios.