Frederick 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 — Frederick County Assessments; Frederick County Treasury Department.
Rate context
PublishedFY2026–2027 county rate $1.1100 + Maryland state rate $0.1120 = $1.2220 per $100 assessed value outside Frederick City and Myersville; municipal differentials apply.
Statement mailing
PublishedJuly 2026; Frederick County states annual and semiannual bills are mailed in July and posted online by July 1; supplemental bills are mailed in August.
Payment deadline
Published2026 tax year: annual and semiannual bills are due by September 30, 2026; the county states unpaid accounts accrue interest beginning October 1, and supplemental/revised bills are due 30 days after issue.
Valuation protest
PublishedWithin 45 days of the date on the Maryland SDAT Notice of Assessment; Frederick County directs assessment appeals to SDAT at 301-815-5350.
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.