This page helps users handle Property Tax tasks in Montgomery County, Maryland, including looking up a bill, estimating a tax amount, choosing a payment method, and knowing when to contact county staff.
Use the Montgomery County Maryland Real Property Tax page for bill search and payment, and use the Montgomery County Maryland Estimated Real Property Tax tool when reviewing a property before a purchase.
Montgomery County Maryland Real Property Tax
The main online service for current real property tax bills is the Montgomery County Maryland Real Property Tax page. It lets users search bills and view or pay Montgomery County real estate property tax.
Have one of these search details ready:
- 8-digit bill number
- 8-digit account number
- Street address without the street suffix, such as “123 MAIN”
Use the search fields on the page, confirm that the bill matches the property, and review the payment options before submitting a payment.
Payment is not complete until funds clear the County’s bank account. The person scheduling the payment is responsible for entering accurate payment information.
Payment methods and fees
Montgomery County lists four ways to pay real property tax. Fees and acceptance rules depend on the payment method.
| Payment method | How it works | Accepted payment types |
|---|---|---|
| Online | Use the real property tax search and payment page. | Electronic check with no fee; credit or debit card with a 2.3% fee |
| Phone | Call (240) 777-8898. | Electronic check with no fee; credit or debit card with a 2.3% fee |
| In person | Go to 27 Courthouse Square, Suite 200, Rockville, MD 20850. | Check payable to “Montgomery County Government MD,” credit or debit card with a 2.3% fee, or cash |
| Mail checks with the payment slip from the bottom of the tax bill. | Check payable to “Montgomery County Government MD” |
Montgomery County does not accept money orders for these listed payment methods. Mailed checks go to Montgomery County MD, PO BOX 824845, Philadelphia, PA 19182.
Payment posting and due date rules
Montgomery County posts payments as received and does not honor postmark dates. Make sure the payment arrives by the due date.
Credit card, e-check, wire transfer, and bill pay processing may extend into early October for payments due by September 30 and into early January for payments due by December 31. A recent payment may take up to 72 hours to update the balance.
Payments made from June 12, 2026, through June 30, 2026, are scheduled to be processed in the tax system beginning July 1, 2026. Those payments may not display until at least July 2, 2026, unless annual billing is finished sooner.
If a payment has not been applied to the property tax bill after 10 days, contact MC311 and place a service request.
Estimated real property tax
The Montgomery County Maryland Estimated Real Property Tax tool estimates real property tax and other non-tax charges for a new owner’s first full fiscal year of ownership.
You can calculate an estimate with one of these entries:
- Account number from the property tax bill the County sends every July
- Street address without street name suffixes or types, such as avenue, street, or lane
The estimate may include property tax, other non-tax charges, and any special assessment, special tax, fee, or charge tied to a development tax district or proposed development tax district.
The estimate is based on next fiscal year’s phase-in value when known, otherwise the current fiscal year’s phase-in value; this fiscal year’s State, County, and municipal tax rates; no property tax credits; and non-tax charges treated as the same next year as the current year.
Tax sale information
Montgomery County’s tax sale program is used to collect unpaid and delinquent property taxes. The 2026 tax sale is listed for Monday, June 8, 2026, for Levy Year 2025.
Real property taxes and related charges are due and payable without interest and penalties on July 1 of each taxable year. Annual billing accounts become overdue and in arrears on October 1. Semi-annual billing accounts become overdue and in arrears on October 1 and January 1.
Interest and penalty accrue at 1 and 2/3 percent per month, or any fraction of a month, until paid in full. Supplemental levies are overdue and in arrears 30 days from the billing date.
Questions about tax sale procedures may be directed to Montgomery County by phone or by mail to the Division of Treasury, 27 Courthouse Square, Suite 200, Rockville, MD 20850, Attention: Tax Sale Administrator.
Property tax contacts
Use these contacts for Montgomery County property tax payment, estimate, tax sale, and service request questions.
-
Montgomery County real property tax phone payments
Phone: (240) 777-8898 - Division of Treasury, 27 Courthouse Square, Suite 200, Rockville, MD 20850
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MC311 Contact Center, 27 Courthouse Square, Rockville, MD 20850
Hours: Monday – Friday, 7 a.m. – 7 p.m.
Phone: (240) 777-0311
TTY: 711 for MD Relay TTY -
Office of Consumer Protection
Phone: (240) 777-3636
Fax: (240) 777-3768
Email: [email protected] -
Tax Sale Administrator, Division of Treasury, 27 Courthouse Square, Suite 200, Rockville, MD 20850
Phone: (240) 777-0311
Common questions
Where can I look up and pay a Montgomery County real property tax bill?
Use the real property tax bill search and payment service. You can search by 8-digit bill number, 8-digit account number, or street address without the suffix.
Can I pay Montgomery County property tax by credit or debit card?
Yes. Montgomery County lists credit and debit card payment options online, by phone, and in person. A 2.3% fee applies, and that fee is not collected by Montgomery County and is not refundable.
Does Montgomery County honor postmark dates for property tax payments?
No. Montgomery County posts payments as received. Make sure the payment is received by the due date.
What should I do if my property tax payment is not showing?
A recent payment may take up to 72 hours to update. If it has not been applied to the property tax bill after 10 days, contact MC311 and place a service request.
How can I estimate real property tax for a property in Montgomery County?
Use the estimated real property tax calculator. Enter an account number or street address to estimate property tax and other non-tax charges for a new owner’s first full fiscal year.
Who can answer questions about the estimated tax system?
The Office of Consumer Protection lists questions or comments for the estimated tax system by phone at (240) 777-3636 or by email at [[email protected]](mailto:[email protected]).