How to Appeal Your Property Tax in Maryland
Maryland homeowners can appeal their property tax assessment if they believe it's too high. This guide covers the 2026 appeal deadline, required evidence, and step-by-step process.
How Maryland Assesses Property
Maryland assesses residential property at 100% of market value.
Maryland assesses property at 100% of full cash value on a triennial cycle.
The Appeal Process
Appeals are heard by the Property Tax Assessment Appeals Board (PTAAB). An informal review is available before filing a formal appeal.
Supervisor of Assessments (Informal)
Property Tax Assessment Appeals Board (PTAAB)
Maryland Tax Court
Circuit Court
Maryland Appeal Deadline
What Overassessment Costs Maryland Homeowners
The median home in Maryland is worth $380,000. If your assessment is just 10% too high, you may be overpaying:
~$407/year
Effective tax rate: 1.07% · Median value: $380,000
Check Your Maryland Assessment
Enter your address to see your estimated overassessment and Maryland filing deadline.
Maryland Counties
Anne Arundel County
Median: $432,000 · Rate: 0.97%
Deadline: 45 days from the date of the assessment notice
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Baltimore County
Median: $413,500 · Rate: 1.03%
Deadline: 45 days from assessment notice date
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Montgomery County
Median: $660,800 · Rate: 0.89%
Deadline: February 13, 2026
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Prince George's County
Median: $345,300 · Rate: 1.11%
Deadline: 45 days from the date of the assessment notice (typically mid-February for properties reassessed in late December)
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Guides & Resources
Property Tax Appeal Resources
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7 companies compared — pricing, coverage, and pros/cons for 2026.
2026 Appeal Deadlines
Every state's deadline, filing method, and what happens if you miss it.
Assessment Ratios by State
Every state's assessment percentage — from 4% to 100% — with worked examples.
9 Ways to Lower Your Property Taxes
From homestead exemptions to formal appeals — every method that works.
Savings Calculator
Check if you're overassessed — enter your assessed value to see potential savings.