Gaithersburg, MD Property Tax Rates
Compare property tax rates across 4 ZIP codes in Gaithersburg, Maryland.
Avg Tax Rate
0.86%
Avg Annual Tax
$4,908
Avg Home Value
$569,250
ZIP Codes
4
Property Tax Overview: Gaithersburg, MD
Gaithersburg has 4 ZIP codes with property tax data. The average effective tax rate across these ZIPs is 0.86%, which is 11% below the Maryland average of 0.96%. Annual property taxes range from $3,471 (ZIP 20879) to $6,266 (ZIP 20878).
For a home at Gaithersburg's median value of $569,250, property taxes add approximately $406/month to housing costs. Gaithersburg home values are above the Maryland median of $428,085, meaning the monthly tax impact is correspondingly higher.
Property tax rates within Gaithersburg vary by 0.13 percentage points across its ZIP codes. This variation typically reflects different school district boundaries, special assessment zones, and municipal service areas within the city.
Gaithersburg vs Maryland Average
Effective Tax Rate
11% below state average
Annual Property Tax
Median Home Value
Frequently Asked Questions
What is the average property tax rate in Gaithersburg, MD?
The average effective property tax rate in Gaithersburg, Maryland is 0.86%, based on 4 ZIP codes.
How much is property tax in Gaithersburg, MD?
The average median annual property tax in Gaithersburg is $4,908 per year, with a median home value of $569,250.
Which ZIP code in Gaithersburg has the lowest property tax rate?
ZIP code 20879 has the lowest effective tax rate in Gaithersburg at 0.80%, with a median annual tax of $3,471.
How many ZIP codes are in Gaithersburg, MD?
Gaithersburg, Maryland has 4 ZIP codes with property tax data available.
Which ZIP code in Gaithersburg has the highest property tax rate?
ZIP code 20878 has the highest effective tax rate in Gaithersburg at 0.93%, with a median annual tax of $6,266.
How do Gaithersburg property taxes compare to the Maryland average?
Gaithersburg's average effective rate of 0.86% is 11% below the Maryland state average of 0.96%.
What factors affect property tax rates between ZIP codes in Gaithersburg?
Property tax rate differences within Gaithersburg are typically driven by school district boundaries (which can account for 40–60% of a tax bill), special assessment zones for fire, water, or transit services, and whether a ZIP falls within city limits or an unincorporated area. Each taxing jurisdiction sets its own rate, which is why adjacent ZIP codes can have noticeably different effective rates.
Tips for Gaithersburg Homeowners
- •Appeal your assessment: If your home is assessed higher than its market value, you can file a property tax appeal. Studies suggest 30–60% of properties are over-assessed. Most counties offer a free informal review process.
- •Check your exemptions: Homestead exemptions can reduce your taxable value and are available to primary residents in most states. Senior, veteran, and disability exemptions may also apply. Exemptions must typically be applied for — they are not automatic.
- •Know your assessment cycle: Maryland reassesses properties periodically. After buying a home, your next tax bill may reflect a new assessment based on your purchase price. Budget accordingly, especially if you bought above prior assessed values.
- •Compare ZIP codes before buying: Even within Gaithersburg, effective tax rates can vary significantly across ZIP codes due to different school district overlays. Use PropertyTaxByZip to compare specific ZIPs before choosing a neighborhood.
Looking for county-level property tax data? View Montgomery County on TaxByCounty.com
Data from U.S. Census Bureau, American Community Survey 2019-2023 5-Year Estimates (ZCTA level). ZIP Code Tabulation Areas (ZCTAs) are Census approximations of USPS ZIP codes.
Estimates are informational only and should not be used as financial or legal advice.