Property Taxes in Keymar, Maryland
Median Keymar, Maryland effective property tax rate: 1.16%, significantly lower than the national median of 1.02%, and lower than the Maryland state median of 1.21%.
Median Keymar, Maryland home value: $333,000
Median annual Keymar, Maryland tax bill: $3,771, $1,371 higher than the national median property tax bill of $2,400.
How are property taxes in Frederick calculated?
Property taxes in Keymar, Maryland are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding Keymar's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Keymar, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
How Does the Keymar Property Tax Calculator Work?
Use this Keymar property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Keymar's median effective tax rate of 1.16% — based on actual property records in Frederick County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local assessment office uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Keymar's median effective rate across all local levies, providing a more accurate estimate than applying a single county millage rate.
Your bill may vary by ZIP code within Keymar: rates are 1.16% in 21757, primarily due to differences in school district levies and local assessment districts.
For a more precise estimate, scroll down to explore ZIP code-level tax rate trends across Keymar.
About Keymar Property Taxes
About Property Taxes in Keymar, Frederick, Maryland
Keymar’s median effective property tax rate of 1.16% is higher than the Maryland state median of 1.21% and higher than the national median of 1.02%. This rate reflects the Frederick County base levy combined with local school district levies and special taxing districts that vary by subdivision throughout the city.
Property tax rates are not uniform across Keymar. Homeowners in the 21757 ZIP code carry a median effective rate of 1.16%, while those in the same ZIP also pay 1.16%. This spread reflects how school district boundaries and local assessment districts are drawn across Frederick County. Understanding which part of Keymar you live in can make a meaningful difference to your annual tax bill.
Keymar homeowners who believe their assessed value is too high can file a formal appeal with the Tax Assessor before the February 13, 2026 deadline each year.
If your estimated bill above seems higher than expected, Ownwell can review your assessment and protest on your behalf. You only pay if we save you money.
Property Tax Rates Across Keymar, Frederick County, Maryland
As noted earlier, local government entities set tax rates, which can vary widely within a state.
Why? Because annually, each county estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction. This calculation results in the property tax rate.
While there are votes and laws involved in setting tax rates and budgets, in a nutshell, this is the annual process.
Below, you can compare Keymar's effective property tax rate to other cities in Maryland and the median property tax rates in Maryland and the U.S.
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Keymar Tax Rate
1.16%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Frederick County Tax Rate
1.23%
Median Effective Maryland Tax Rate
1.21%
Median Effective United States Tax Rate
1.27%
Property Tax Rates Across Keymar, Frederick County, Maryland
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 21757 | 1.01% | 1.11% | 1.16% | 1.19% | 1.21% |
Source: Ownwell
Property Tax Assessment Values Across Keymar, Frederick County, Maryland
When examining property taxes in Keymar, Maryland, understanding the distinction between "market value" and "assessed value" is crucial.
The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The Frederick County assessment office estimates the market value for tax purposes.
The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
Assessment notices:
In Frederick County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of the month when notices are sent.
Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in Keymar.
For example, the median home price in Keymar is $333,000, with tax bills ranging significantly across the county. 21757 has the highest median home price at $333,000.
Property Tax Assessment Values Across Keymar, Frederick County, Maryland
Source: Ownwell
$235,400
$376,075
$516,750
Median Keymar Market Value
$333,000
Median Frederick County Market Value
$378,800
Median Maryland Market Value
$338,400
Median United States Market Value
$274,101
Property Tax Assessment Values Across Keymar, Frederick County, Maryland
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 21757 | $173,800 | $258,100 | $333,000 | $418,300 | $507,300 |
Source: Ownwell
Property Tax Bills Across Keymar, Frederick County, Maryland
Property tax bills in Keymar are based on the assessed value of the home and the local tax rate set for Frederick County. When a property’s market value is determined, that assessment becomes the starting point for calculating the bill. The higher the assessed value, the higher the tax bill is likely to be, while a lower assessment can reduce what a homeowner owes.
In Keymar, the median home price is $333,000, and the median property tax bill is $3,771, which is above the national median property tax bill of $2,400. That means homeowners in this area often pay more than the typical U.S. homeowner. Tax bills can also vary widely, with the 25th percentile at $2,920 and the 75th percentile at $4,625. For many homeowners, this makes property taxes a significant part of the cost of owning a home.
Median Keymar Tax Bill
$3,771
Median Frederick County Tax Bill
$4,845
Median Maryland Tax Bill
$4,092
Median United States Tax Bill
$3,209
Property Tax Bills Across Keymar, Frederick County, Maryland
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 21757 | $1,936 | $2,920 | $3,771 | $4,625 | $5,588 |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | February 13 |
Links | |
|---|---|
| Frederick Tax Assessor | |
| Website | sdat.dat.maryland.gov |