Tax Bills Now Available & Refund Request Process
2025 tax bills are now available online dated 11/17/2025. If you overpaid by more than $50, learn how to request a refund from New Castle County through the new online process.
💰 2025 Tax Bills Now Available & Refund Process Announced
Official 2025 tax bills are online. If you overpaid by more than $50, you can now request a refund directly from New Castle County.
New Castle County has published the official 2025 property tax bills dated November 17, 2025. These bills reflect the new property assessments from the 2025 reassessment and the split school tax rates implemented under House Bill 242 for the 2025-2026 tax year.
New Castle County has established an online process for property owners who overpaid their taxes by more than $50 to request a refund.
Who Qualifies for a Refund
Property owners who paid more than $50 in excess of their final tax bill amount are eligible to request a refund. Look at your 11/17 bill - if you see a negative amount and it says 'Overpayment', you most likely qualify and should submit a request.
Action: Calculate your overpayment by comparing what you paid to the final amount shown on your November 17, 2025 tax bill.
How to Submit a Refund Request
New Castle County has created an online workflow through SimpliGov for submitting refund requests. Have the following information ready when you submit: Parcel #, refund amount (from your 11/17 bill), date of original payment (found on your credit card or bank statement), original payment method, and reason for requesting a refund (put 'Overpayment due to new school split rate system').
Action: Visit the online refund request form and provide your property information, payment records, and the amount you're requesting.
Processing Time
The county will review refund requests and process eligible refunds according to their standard procedures.
Action: Keep copies of your tax bill, payment confirmations, and refund request submission for your records.
Questions About Refunds
If you have questions about whether you qualify or how to request a refund, consult the county's FAQ document.
Action: Review the official NCC Property Reassessment and Tax Billing FAQ for detailed information about refunds and other billing questions.
Your 2025 tax bill includes both county taxes and school taxes, calculated using your property's new assessed value from the 2025 reassessment.
Use MyDETax.com's free tools to understand your tax bill and explore your options:
- Search your property to see 2024 vs 2025 tax comparison
- View your property's classification (residential vs commercial)
- See which school tax rate applies to your property
- Check if you might qualify for senior tax credits
- Access direct links to your official NCC tax bill
- Request a refund if you overpaid by more than $50
Key things to keep in mind as you review your 2025 tax bill:
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