2026 Property Tax Due Dates
July 1
Full or first half due
December 1
Second half (if semi-annual)
Payment Methods
Online, Mail, In-Person
Montgomery County Treasurer
Phone
(240) 777-0311Office Hours
How to Pay
Online
Pay using credit card or e-check
By Mail
Mail check payable to Montgomery County Treasurer
In Person
Visit the Treasurer's office — 27 Courthouse Square, Suite 200, Rockville MD 20850, Mon-Fri 8am - 4:30pm
About Property Taxes in Maryland
Maryland property taxes are levied by both the state and local governments (counties and municipalities). Property is assessed at full cash value (100% of market value) by the State Department of Assessments and Taxation (SDAT). Counties then apply their own tax rates to that value. Maryland conducts reassessments on a three-year rolling cycle — approximately one-third of all properties are reassessed each year. When a property is reassessed and value increases significantly, Maryland phases in the increase over three years to reduce the impact on property owners. This phased-in value (rather than the full assessed value) is what your tax bill is based on.
Payment & Assessment
Maryland property tax bills are typically mailed in July, covering the fiscal year from July 1 to June 30. Payment schedules vary by county: Most counties: Due September 30 (full year) or semi-annual installments (September 30 and December 31, or other dates). Some counties offer a 30-day grace period. Late interest of 1% per month typically applies. Most counties offer online payment through the county government website. Contact your county finance department for payment options.
Statewide framework for Maryland. Your county's specific rates and deadlines are shown above.
Other Counties in Maryland
About Montgomery County
Montgomery County is the most populous county in the U.S. state of Maryland. As of the 2020 United States census, the county's population was 1,062,061, increasing by 9.3% from 2010. The county seat is Rockville, while its most populous place is Germantown. The county is adjoined to Washington, D.C., the nation's capital, and is part of the Washington metropolitan area and the Washington–Baltimore combined statistical area. Most of the county's residents live in Silver Spring, Bethesda, Germantown, and the incorporated cities of Rockville and Gaithersburg.
Source: Wikipedia — content available under CC BY-SA 4.0
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Due dates shown are for reference only. Contact your county treasurer's office to confirm official deadlines before making payments.