Sales tax in New Castle County, Delaware
The sales tax rate in New Castle County, Delaware is 0%. That is a 0% state rate, with no county rate on top: New Castle County levies none, and it is the same at every address in the county. That rate was read from Delaware's own published schedule and checked on August 30, 2026.
What is the sales tax rate in New Castle County?
| Delaware state rate | 0% |
|---|---|
| Combined rate | 0% |
Sales tax in counties next to New Castle County
New Castle County borders 7 counties, 6 of them in another state.
| County | Combined sales tax |
|---|---|
| Gloucester County, NJ | 6.625% |
| Salem County, NJ | 6.625% |
| Cecil County, MD | 6% |
| Kent County, MD | 6% |
| Chester County, PA | 6% |
| Delaware County, PA | 6% |
| Kent County, DE | 0% |
| New Castle County, DE (this county) | 0% |
Why the rate here is not the whole story
No sales or use tax of any kind on retail purchases; the state instead relies on a gross receipts tax imposed on businesses.
How do I find the exact rate for an address in New Castle County?
Use Delaware's own address lookup.
Who has to collect sales tax in New Castle County?
Any seller with a physical presence in Delaware collects at the rate for the address of the sale; a remote seller does once it passes Delaware's economic nexus threshold. Delaware sales tax covers the statewide rules and what is exempt.
Work out your own numbers
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Sales tax calculator
Tax on a specific purchase at this county's rate, and the total you will actually pay.
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Do you have to collect?
Whether your sales into Delaware cross its economic nexus threshold. A different question from the rate.
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Property tax in New Castle County
The other local tax: effective rate and median bill for this county.
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Sales tax by county
Every US county, and how Delaware compares with the rest of the country.
Sources
- New Castle County rates: Delaware Division of Revenue / Tax Foundation, State and Local Sales Tax Rates (Jan. 2026)
- Collected and verified August 30, 2026. Confidence: S on the rate components (P read on a primary agency page, S strong but indirect, U unverified).