This page helps users handle a property tax need in New Castle County, Delaware, including checking bill details, reviewing payment status, and finding official payment options.
New Castle County Parcel Search, Paymentus, and the New Castle County Office of Finance Treasury division are the main official channels for tax bill lookup, payment, and billing questions.
Parcel Search for tax bill and payment status
Use New Castle County Parcel Search to look up property tax information, payment status, printable bills, payment history, and charge details for property, school, light, and crossing guard taxes.
Have one or more property details ready before you search:
- Parcel number, entered without dashes, periods, spaces, or other special characters
- Street number and street name, without directions, apartment numbers, or suffixes such as Road, Lane, or Ave.
- City, subdivision, deed book, page, or lot number when those details help narrow results
Once you find the property, review the account details carefully before paying or contacting Treasury.
- Open search New Castle County Parcel Search.
- Enter the parcel number or property address details.
- Select the matching parcel and review the tax, sewer, invoice, and payment history information.
- Download a printable bill if the original bill was misplaced or not received.
For numbered street names, spell out the number, such as TWENTY FIFTH instead of 25th.
Pay county and school tax bills
New Castle County uses Paymentus for online county and school tax payments. The one-time payment form asks for the payment type, account or parcel number, five-digit parcel ZIP Code, and email address.
To begin, use make a one-time county and school tax payment. Enter the account or parcel number as shown on the tax bill, using only upper case letters when letters are included.
Paymentus accepts major credit and debit cards, electronic checks, ACH payments, PayPal, PayPal Credit, Apple Pay, Google Pay, and Venmo. Phone payments are also available through Paymentus at (877) 225-7351. Paymentus payment questions may be directed to (800) 420-1663.
Tax billing dates and penalties
New Castle County tax billing statements are normally mailed during the third week of July. County property and local school taxes are normally due September 30. For 2025, revised bills are being mailed and tax payments are due December 31.
| Tax item | When available | Due date | Contact |
|---|---|---|---|
| Annual property tax bill | July | September 30 | Treasury at (302) 395-5340 |
| Supplemental I bill | October | December 1 | Treasury at (302) 395-5340 |
| Supplemental II bill | January | March 1 | Treasury at (302) 395-5340 |
| Supplemental III bill | April | June 1 | Treasury at (302) 395-5340 |
Taxes unpaid after the due date are subject to a 6% penalty on county property line items and a 1% penalty on school line items for the first month. A 1% penalty applies to all tax line items each month after that.
Other ways to pay
New Castle County lists several payment options for tax bills. Include the invoice stub when available. If the stub is missing, include the parcel number.
| Payment option | Payment types | Location or address |
|---|---|---|
| Paymentus online | E-checks, credit and debit cards, Venmo, PayPal, Apple Pay, and Google Pay | pay through Paymentus |
| Self-service e-Pay kiosks | Checks, e-checks, and credit cards | Government Center, 87 Reads Way, New Castle; Appoquinimink Library, 204 E. Main Street, Middletown |
| Secure drop box | Checks and money orders | Government Center, 87 Reads Way, New Castle; available 24/7/365 |
| In person with Treasury | Cash, checks, money orders, and debit cards | Government Center, 87 Reads Way, New Castle; Monday through Friday, 8 a.m. to 4 p.m. |
| USPS mail delivery | Checks and money orders | New Castle County, P.O. Box 782888, Philadelphia, PA 19178-2888 |
Do not postdate a check. The check is processed when received. Property tax payments sent by mail or online banking should use New Castle County, P.O. Box 782888, Philadelphia, PA 19178-2888.
Exemptions, credits, refunds, and billing updates
New Castle County provides property tax forms for exemptions, billing address changes, overpayment refunds, and classification challenges. Partial tax exemptions may be available for some disabled taxpayers, taxpayers over 65, nonprofit organizations, and agricultural property when conditions are met.
Review tax information and forms for billing forms, revised tax billing details, tax rates, and payment guidance. For exemption applications, use review New Castle County tax exemptions.
County over-65 and disability exemption forms have a June 1 due date. State of Delaware Senior School Credit forms and Disabled Veterans School-Property Tax Credit forms have an April 30 due date. Assessment can answer exemption questions at (302) 395-5520.
Pre-payment and delinquent tax help
Property owners may use ACH pre-payment to reduce the amount owed when the annual school and property tax bill is due. Pre-payments are posted as a credit and applied to the next tax bill.
Before setting up ACH pre-payment, check the parcel account in Parcel Search and review any outstanding tax or sewer balances. If there is a remaining balance when the annual bill is due, the property owner is responsible for paying it by the due date.
For delinquent tax accounts, New Castle County refers users to pre-payment coupons for recurring payments. The coupon must be included with pre-payments so funds are allocated to the correct account.
Tax rates and tax estimator
New Castle County publishes county property and local school tax rates for the 2025-2026 tax year, including residential and non-residential rates. The rates include county, school district, Vo-Tech, light tax, crossing guard, and certain incorporated area categories when applicable.
The county also provides a tax change estimator designed to show the change to New Castle County property tax based on a proposed rate increase for every $100 of assessed property value. The estimate excludes crossing guard, streetlight tax, and local school tax.
New Castle County tax contacts
Use these contacts for billing, payment, assessment, exemption, and Paymentus questions.
-
Office of Finance, New Castle County Government Center, 87 Reads Way, New Castle, DE 19720
Phone: (302) 395-5340 -
Treasury billing and tax questions
Email: [email protected]
Phone: (302) 395-5340
Hours: Monday through Friday, 8 a.m. to 4 p.m. -
Office of Assessment, 87 Reads Way, New Castle, DE 19720
Phone: (302) 395-5520 -
Paymentus phone payments
Phone: (877) 225-7351 -
Paymentus Customer Contact Center
Phone: (800) 420-1663 -
Treasury Collections Unit, 87 Reads Way, New Castle, DE 19720
Phone: (302) 395-5340 Option 2
Fax: (302) 395-5110
Email: [email protected]
Common questions
Where can I check whether my New Castle County property tax bill was paid?
Use New Castle County Parcel Search to review property tax information, payment status, payment history, and printable bill details.
What information do I need to pay through Paymentus?
The one-time payment form asks for the payment type, account or parcel number, five-digit parcel ZIP Code, email address, and email confirmation.
When are county property and local school taxes due?
They are normally due September 30. For 2025, revised bills are being mailed and payments are due December 31.
What should I do if I lost the payment stub?
Include the parcel number with the payment. New Castle County also allows property owners to download a printable bill through Parcel Search.
Who handles exemption questions?
The New Castle County Office of Assessment handles exemption questions and can be reached at (302) 395-5520.