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Delaware Property Tax Calculator

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Overview of Delaware Taxes

Delaware boasts the sixth lowest property tax rate of any state in the U.S. The average effective property tax rate is just 0.56%. That means that, on average, a home in the state of Delaware with a market value of $200,000 would have taxes of about $1,120 annually.

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  • About This Answer

    To calculate the exact amount of property tax you will owe requires your property's assessed value and the property tax rates based on your property's address. Please note that we can only estimate your property tax based on median property taxes in your area. There are typically multiple rates in a given area, because your state, county, local schools and emergency responders each receive funding partly through these taxes. In our calculator, we take your home value and multiply that by your county's effective property tax rate. This is equal to the median property tax paid as a percentage of the median home value in your county.

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  • Our Tax Expert

    Jennifer Mansfield Tax

    Jennifer Mansfield, CPA, JD/LLM-Tax, is a Certified Public Accountant with more than 30 years of experience providing tax advice. SmartAsset’s tax expert has a degree in Accounting and Business/Management from the University of Wyoming, as well as both a Masters in Tax Laws and a Juris Doctorate from Georgetown University Law Center. Jennifer has mostly worked in public accounting firms, including Ernst & Young and Deloitte. She is passionate about helping provide people and businesses with valuable accounting and tax advice to allow them to prosper financially. Jennifer lives in Arizona and was recently named to the Greater Tucson Leadership Program.

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Delaware Property Taxes

Photo credit: ©iStock.com/aimintang

Delaware’s three counties are responsible for administering and collecting property taxes in the state. Rates vary between and within those counties. Below, we will take a closer look at rates and rules in Sussex, New Castle and Kent counties.

If you’re considering buying property in Delaware, you’ll want to use SmartAsset’s Delaware mortgage guide as a reference for information on rates and getting a mortgage in the First State.

A financial advisor in Delaware can help you understand how homeownership can fit into your overall financial goals. Financial advisors can also help with investing and financial plans, including taxes, homeownership, retirement and more, to make sure you are preparing for the future.

How Delaware Property Taxes Work

Unlike most other states, local governments in Delaware do not reassess property values on a regular basis. Instead, all counties and cities base their property taxes on the values calculated the last time all property was reassessed.

This is called the reassessment year. For example, the Kent County reassessment year is 1987. In New Castle County, the reassessment year is 1983. In Sussex County, the reassessment year is 1974. Municipalities also have their own assessments, although some simply use the county assessment.

Assessed values are based on the market value as of that reassessment year. In Kent County, for example, assessed values are equal to 60% of the 1987 market value.

If a homeowner makes additions to a property or builds a new structure on the lot, the value is reassessed. Even in those cases, however, the assessor does not try to determine current value, rather what the value would have been in the reassessment year.

As you can imagine, home prices in the reassessment years for each county were significantly lower than they are now. That means assessed values are a fraction of current market values.

Delaware Property Tax Rates

Property tax rates in Delaware are largely affected by the state’s reassessment system. Areas like Sussex County, which has not had a reassessment in 45 years, may have higher rates because assessed values are so low.

It is helpful, therefore, to look at effective tax rates. Effective tax rates are annual taxes paid as a percentage of current market value. The table below shows the effective tax rates, median home values and median annual property tax payments for all three Delaware counties.

CountyMedian Home ValueMedian Annual Property Tax PaymentAverage Effective Property Tax Rate
Kent County, Delaware$205,800$1,0440.51%
New Castle County, Delaware$248,100$1,8020.73%
Sussex County, Delaware$242,900$8200.34%

Looking to calculate your potential monthly mortgage payment? Check out our mortgage calculator.

New Castle County

While New Castle County has the highest property tax rate of Delaware’s three counties, property taxes are still quite low when compared nationwide. The median effective tax rate in New Castle County is about 0.73%. That's more than double the rate in Sussex County. Even so, it means that property taxes on a $200,000 home would be just $1,460 annually.

In Wilmington, the largest city in the state, the property tax rate is $1.995 per $100 of the assessed value of a property. However, assessed value is just a fraction of current market value, so the effective tax rate in the city is much lower.

The city of Wilmington also offers a property tax exemption for senior citizens. Seniors can claim an exemption of up to $715.64 annually and may also receive a discount on their sewer and water bills. Qualifying seniors have a maximum income of $19,000 for married couples or $15,000 for singles, excluding Social Security income.

Sussex County

Photo credit: ©iStock.com

Sussex County has some of the lowest property tax rates, not just in the state of Delaware, but in the entire country.

In fact, a typical Sussex County homeowner pays just $820 annually in property taxes, which comes in as a bit less than one-third of the U.S. average.

The median home value in Sussex County is about $242,900, so that makes the median effective property tax rate in Sussex County 0.34%.

Rates vary within Sussex County by school district. The low rate is $3.035 per $100 of assessed value in the Indian River School District. The high rate is $5.6995 per $100 of assessed value in the Milford School District.

Kent County

The average effective property tax rate in Kent County is about 0.51%. That means a homeowner with a home worth $150,000 can expect to pay $765 annually in property taxes.

It's important to note, however, that actual taxes may vary from the expected amount. That’s because assessed values in Kent County are equal to 60% of the market value in 1987. Since prices have fluctuated significantly since then, taxes may differ between two homes with the same current value that reside the same tax district.

Places Receiving the Most Value for Their Property Taxes

SmartAsset’s interactive map highlights the places across the country where property tax dollars are being spent most effectively. Zoom between states and the national map to see the counties getting the biggest bang for their property tax buck.

Rank County Property Tax Rate School Rating Home Value Growth


Our study aims to find the places in the United States where people are getting the most value for their property tax dollars. To do this, we looked at property taxes paid, school rankings and the change in property values over a five-year period.

First, we used the number of households, median home value and average property tax rate to calculate a per capita property tax collected for each county.

As a way to measure the quality of schools, we analyzed the math and reading/language arts proficiencies for every school district in the country. We created an average score for each district by looking at the scores for every school in that district, weighting it to account for the number of students in each school. Within each state, we assigned every county a score between 1 and 10 (with 10 being the best) based on the average scores of the districts in each county.

Then, we calculated the change in property tax value in each county over a five-year period. Places where property values rose by the greatest amount indicated where consumers were motivated to buy homes, and a positive return on investment for homeowners in the community.

Finally, we calculated a property tax index, based on the criteria above. Counties with the highest scores were those where property tax dollars are going the furthest.

Sources: US Census Bureau 2018 American Community Survey, Department of Education