Property Taxes in Rockville, Maryland
Median Rockville, Maryland effective property tax rate: 1.22%, significantly higher than the national median of 1.02%, and higher than the Maryland state median of 1.21%.
Median Rockville, Maryland home value: $527,000
Median annual Rockville, Maryland tax bill: $6,589, higher than the national median property tax bill of $2,400.
How are property taxes in Montgomery calculated?
Property taxes in Rockville, 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 Rockville's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Rockville, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
How Does the Rockville Property Tax Calculator Work?
Use this Rockville property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Rockville's median effective tax rate of 1.22% — based on actual property records in Montgomery County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local assessment process uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Rockville'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 Rockville: median property tax bills range from $6,037 in 20851 to $9,586 in 20855, primarily due to differences in school district levies and local assessment districts.
For a more precise estimate, scroll down to explore ZIP code-level property tax trends across Rockville.
About Rockville Property Taxes
About Property Taxes in Rockville, Montgomery, Maryland
Rockville’s median effective property tax rate of 1.22% is higher than the Maryland state median of 1.21% and higher than the national median of 1.02%. This rate reflects the Montgomery 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 Rockville. Homeowners in the 20851 ZIP code carry a median effective rate of 1.34%, while those in 20855 pay 1.13%. This spread — 0.21 percentage points across the same city — reflects how school district boundaries and local assessment districts are drawn across Montgomery County. Understanding which part of Rockville you live in can make a meaningful difference to your annual tax bill.
Rockville homeowners who believe their assessed value is too high can file a formal appeal with the local 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 Rockville, Montgomery 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 Rockville'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 Rockville Tax Rate
1.22%
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 Montgomery County Tax Rate
1.19%
Median Effective Maryland Tax Rate
1.21%
Median Effective United States Tax Rate
1.27%
Property Tax Rates Across Rockville, Montgomery County, Maryland
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 20850 | 1.07% | 1.21% | 1.33% | 1.43% | 1.45% |
| 20851 | 1.24% | 1.30% | 1.34% | 1.38% | 1.40% |
| 20852 | 1.08% | 1.14% | 1.17% | 1.22% | 1.38% |
| 20853 | 1.15% | 1.17% | 1.21% | 1.25% | 1.27% |
| 20855 | 1.11% | 1.12% | 1.13% | 1.16% | 1.19% |
| 20854 | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Assessment Values Across Rockville, Montgomery County, Maryland
When examining property taxes in Rockville, 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. Montgomery County 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 are sent in the spring each year and typically reach your mailbox by the middle of May. 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.
For example, the median home price in Rockville is $527,000, with tax bills ranging significantly across the county. ZIP code 20855 has the highest median home price at $847,400. Rockville’s median tax bill is $6,589, well above the national median property tax bill of $2,400.
Property Tax Assessment Values Across Rockville, Montgomery County, Maryland
Source: Ownwell
$110,000
$614,075
$1,118,150
Median Rockville Market Value
$527,000
Median Montgomery County Market Value
$520,100
Median Maryland Market Value
$338,400
Median United States Market Value
$274,101
Property Tax Assessment Values Across Rockville, Montgomery County, Maryland
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 20850 | $320,000 | $430,875 | $599,400 | $769,525 | $1,032,900 |
| 20851 | $383,860 | $413,100 | $451,500 | $502,200 | $573,000 |
| 20852 | $205,000 | $325,000 | $513,900 | $750,000 | $993,860 |
| 20853 | $392,800 | $439,600 | $519,900 | $648,900 | $787,300 |
| 20855 | $556,440 | $772,950 | $847,400 | $900,600 | $953,520 |
| 20854 | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Bills Across Rockville, Montgomery County, Maryland
Property tax bills in Rockville are based on the assessed market value of a home and the local tax rate set by Montgomery County and other taxing authorities. When a property’s assessed value rises, the bill can increase even if the homeowner has not made any changes to the home. For a home with a median value of $527,000, the tax burden can be substantial, especially compared with the national median property tax rate of 1.02% and national median property tax bill of $2,400.
Several factors affect the final bill, including the home’s location, neighborhood, and the specific tax rates applied to the property. In Rockville, the tax bill typically falls between $5,186 at the 25th percentile and $9,007 at the 75th percentile, with the 90th percentile reaching $11,399. That means homeowners may see very different bills depending on where they live and how their property is assessed.
For homeowners, this can have a direct impact on monthly housing costs and long-term affordability. Even small assessment changes can lead to meaningful increases in the amount owed each year.
Median Rockville Tax Bill
$6,589
Median Montgomery County Tax Bill
$6,208
Median Maryland Tax Bill
$4,092
Median United States Tax Bill
$3,209
Property Tax Bills Across Rockville, Montgomery County, Maryland
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 20850 | $3,472 | $5,574 | $8,229 | $9,996 | $12,663 |
| 20851 | $5,267 | $5,647 | $6,037 | $6,560 | $7,209 |
| 20852 | $2,279 | $3,589 | $6,096 | $9,252 | $12,316 |
| 20853 | $4,948 | $5,445 | $6,330 | $7,564 | $9,071 |
| 20855 | $6,514 | $8,887 | $9,586 | $10,131 | $10,853 |
| 20854 | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | February 13 |
Links | |
|---|---|
| Montgomery Tax Assessor | |
| Website | sdat.dat.maryland.gov |