Montgomery County, Maryland property-tax rates and deadlines
Tax bills, payment rules, and valuation-review windows are controlled by the local jurisdiction and the governing state framework. The reviewed record below separates published figures from items that still require confirmation with Maryland State Department of Assessments and Taxation — Montgomery County Assessments; Montgomery County Department of Finance, Treasury Division.
Rate context
PublishedFY2025–2026 published county rate $0.6742 + Maryland state rate $0.1120 = $0.7862 per $100 assessed value; municipal and special-area charges vary.
Statement mailing
PublishedJuly 1, 2026; Montgomery County states annual and semiannual tax bills are mailed and posted by July 1 each year.
Payment deadline
Published2026 tax year: annual bills and first semiannual installments must be received by September 30, 2026 and become delinquent October 1; second semiannual installments must be received by December 31, 2026 and become delinquent January 1, 2027.
Valuation protest
PublishedWithin 45 days of the date on the Maryland SDAT Notice of Assessment; Montgomery County directs assessment appeals to SDAT and states taxes remain due during an appeal.
Do not assume a grace period.
The reviewed record identifies the payment timing above but does not establish a universal penalty schedule for this page. Late charges, interest, collection costs, tax-sale procedures, and lien or foreclosure timelines can depend on state law and the local collector’s process. If the deadline is close or a balance is delinquent, contact the tax collector directly and request the current payoff amount in writing.
Treat a published payment deadline as a hard operational date and retain your receipt or confirmation number.
From assessment to collection
01Valuation and notice
Review the assessment notice as soon as it arrives. The protest window may run from the notice date rather than from the payment due date.
02Statement and account review
Match the tax statement to the parcel or account number and confirm exemptions, assessed value, taxing units, credits, and balance.
03Payment confirmation
Use the official collector channel, then save the receipt, transaction reference, and date posted. A bank submission is not always the same as a county posting date.