Semi-Annual tax bills are due September 30th of each year. The second installment is due December 31st. Supplemental and revised tax bills are due 30 days from the time of issue. To avoid Tax Lien Sale, payment due dates are April 30th, May 30th, and the Friday before the second Monday in June.

When a due date falls on a weekend or a holiday, payment will be accepted on the following business day without additional interest and penalty. Note: this is only for real property taxes.

For additional assistance, contact the Ombudsman's Office, link below.

Payment methods as follows (see link):

Online with an electronic check (no extra charge, and one can cancel prior to the due date if necessary) or credit/debit card (convenience fee for this method is about 2.3 percent and cannot be waived) first link below.

Pay by phone: 240.777.8898.

In person, at Montgomery County Division of Treasury, 27 Courthouse Square, Suite 200, Rockville, MD 20850, 8:00 AM through 4:30 PM Monday through Friday. A drop box is located inside the office during the same hours.

By Mail, for Real Property, send to: Montgomery County, Maryland, P.O. Box 824845 Philadelphia, Pennsylvania, 19182-4845; Personal Property, send to: Montgomery County, Maryland, P. O. Box 824860, Philadelphia, Pennsylvania, 19182-4845. Express mail: Montgomery County Division of Treasury address above. Express mail is sent out to PNC in PA (the County's banking institution). Includes FEDEX, UPS, USPS and 99% of all regular mail that is sent to the Rockville location.

Transfer (wire) funds: Wire payments must be directed to PNC Bank, 800 Connecticut Avenue, NW, Washington, DC 20006 ABA #031000053 for credit to Montgomery County Maryland Depository Account Number 5303561481, TIN #526000980. Once the wire transfer has been made, please send an email to Jeanette Pedersen at jeanette.pedersen@montgomerycountymd.gov

There is no discount for paying early. Money orders not accepted.