Montgomery County property owners face a September 30, 2026 deadline for annual property tax payments. A second installment is due December 31, 2026 for eligible properties. Payments can be made online for both real and personal property or by phone at 240-777-8898.
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Source: Montgomery County, MD, “Montgomery County MD Annual Property Tax Payment due 09/30”, received Sep 15, 2026.
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Key dates
2026-09-30
deadline — Annual property tax first installment due
2026-12-31
deadline — Second installment due for eligible properties
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