Charles County, MD Property Tax: $4,179/yr (2026)
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The effective property tax rate in Charles County is 1.04% of assessed home value. On a home at the county median value of $402,300, that works out to about $4,184 per year, or $349 per month. Charles County is located in southwestern Maryland, with La Plata as its county seat, and is home to approximately 168,710 residents.
About Charles County
Charles County covers approximately 457.8 square miles in Maryland. The county is home to about 168,710 residents living in roughly 63,053 housing units, of which 77.6% are owner-occupied. The median household income is $120,592, and the median home was built in 1990.
The county seat is La Plata. Charles County borders Calvert County, Prince George's County, St. Mary's County, Fairfax County, King George County — useful comparisons if you're considering nearby areas with potentially different tax rates.
How Property Taxes Work in Maryland
Property taxes in Maryland are administered at the county level. Each county sets a millage rate applied to the assessed value of real property — the effective rate above accounts for any partial assessments and exemptions already built into the local tax base. Assessed value can differ meaningfully from current market value depending on how often the county reassesses and what fraction of market value it uses.
Most counties in Maryland offer exemptions that reduce the taxable assessed value: homestead exemptions for primary residences, senior exemptions, disability exemptions, and veteran exemptions are common. These reduce your effective rate below the county-wide average shown here. Contact the Charles County Assessor's office to learn which exemptions apply to your property and when to file.
Charles County vs. Neighboring Counties
| Location | Eff. Rate | Median Home | Annual Tax |
|---|---|---|---|
| Charles County, MD | 1.04% | $402,300 | $4,184 |
| Maryland state average | 0.96% | — | $3,862* |
| Calvert County | 0.88% | $440,200 | $3,858 |
| Prince George's County | 1.15% | $404,300 | $4,662 |
| St. Mary's County | 0.87% | $390,900 | $3,392 |
| Fairfax County | 1.01% | $699,700 | $7,072 |
| King George County | 0.56% | $395,900 | $2,221 |
| US national average | 1.10% | $281,900 | $3,101 |
*State average annual tax computed at Charles County's median home value of $402,300. Source: US Census ACS 2023 5-year estimates.
Frequently Asked Questions
How does Charles County's property tax rate compare to the rest of Maryland?
At 1.04%, Charles County is higher than the Maryland state average of 0.96%. On a home at the county median of $402,300, that means about $4,184 per year — versus $3,862 at the state average rate, a difference of $322 per year. Compared to the national average of 1.10%, Charles County is below average.
What's a typical annual property tax bill in Charles County?
For a home at the county median value of $402,300, the annual property tax in Charles County is approximately $4,184 — or about $349 per month. For a home worth $603,450, expect around $6,276 per year. For a $804,600 home, approximately $8,368 per year. Use the calculator above to estimate taxes for any assessed value.
Where do I appeal a Charles County property tax assessment?
Property assessment appeals in Charles County are handled by the Charles County Assessor's office in La Plata. Most jurisdictions require filing within 30–90 days of receiving your assessment notice — confirm the specific deadline with the assessor's office before submitting, as deadlines and procedures vary by county. A successful appeal can reduce your assessed value and lower your tax bill for the current and future tax years.
What exemptions are available in Charles County?
Maryland counties commonly offer homestead exemptions for owner-occupied primary residences, senior citizen exemptions for qualifying homeowners aged 65 and older, exemptions for disabled residents, and veterans' exemptions. Each exemption reduces your assessed taxable value, which in turn reduces your effective tax rate below the county-wide 1.04% shown here. Contact the Charles County Assessor's office to confirm which exemptions are available and the application deadlines.
Data sources: US Census Bureau ACS 2023 5-Year Estimates, US Census Gazetteer (2024), County Adjacency File