Montgomery County Maryland Property Tax Guide: Pay, Search, Due Dates & Exemptions
Montgomery County property taxes are easier to handle when you verify the bill before taking action. A missing July bill, wrong account number, old payment slip, mortgage escrow payment, city tax line, refuse charge, or missed tax credit can change what you should do next. This guide explains how to search your bill, read the charges, pay safely, check due dates, understand credits, and know when to use official county or Maryland SDAT tools.
Quick Answer
To manage a Montgomery County Maryland property tax bill, search the official real property tax portal by 8-digit bill number, 8-digit account number, or street address without the street suffix. Confirm the property, levy year, tax period, amount due, prior payments, interest, and payment method before paying.
Use electronic check online or by phone if you want the no-extra-fee payment route. Card payments have a processing fee. If you mail a check, include the payment slip from the bottom of the bill and make sure the county receives it by the due date.
Montgomery County Property Tax Help by Situation
Use this section if you came from search and want the right path quickly. Each topic below points to the article section that explains the task before you open an official portal.
| Your Situation | What to Check First | Best Next Step |
|---|---|---|
| I need to find my property tax bill | Bill number, account number, or street address without the suffix. | Use the bill search guide |
| I want to pay online | Balance, due date, payment status, and whether escrow already paid. | Follow the safe payment steps |
| I need due dates | Annual bill or semi-annual installment status. | Read the due-date section |
| My bill looks too high | Assessment, phase-in value, tax rate lines, credits, refuse and other charges. | Review bill details |
| I may qualify for relief | Homestead status, Homeowners’ Tax Credit, County Supplement, veteran relief, and disability-related exemptions. | Check credits and exemptions |
| I just bought a home | Estimated first full fiscal-year taxes and non-tax charges. | Use the new buyer checklist |
Before You Pay: 8 Checks That Prevent Most Problems
Many property tax issues happen because users pay too quickly. Before entering bank or card information, confirm that you are paying the correct bill and that no escrow or recent payment is still processing.
How to Search a Montgomery County Maryland Property Tax Bill
The official Montgomery County real property tax portal is the best starting point for bill lookup, balance checks, and payment status. The portal asks for an 8-digit bill number, 8-digit account number, or street address without street suffix.
- Open the official Montgomery County Real Property Tax portal.
- Enter the 8-digit bill number, 8-digit account number, or street address without the suffix.
- Confirm the property address and account number before continuing.
- Open the bill detail page and review levy year, tax period, charges, payments, interest, and balance.
- Do not pay until the property and amount due match your records.
Search by account number
Use account number search when you have a county bill, closing document, mortgage escrow record, or prior-year tax statement. Account number search is usually cleaner than name-based searching because it points to a specific property account.
Search by street address
Use address search if you do not know the bill or account number. Enter the street address without suffix. For example, use “123 MAIN” instead of “123 Main Street.”
Can you search by owner name?
The county real property tax portal is built around bill number, account number, and street address. Owner names can change after a sale, trust transfer, estate situation, or business ownership change, so do not use owner-name clues as final proof for payment.
How to Pay Montgomery County Maryland Property Tax
Montgomery County lists four main payment routes: online, phone, in person, and mail. The lowest-cost route for many users is electronic check because the county lists no fee for e-check payment. Card payments have processing fees.
| Payment Method | What to Know | Micro Steps | Official Link or Detail |
|---|---|---|---|
| Online electronic check | No fee listed for e-check payments through the real property tax portal. | Search bill → confirm account → choose e-check → enter bank details → save confirmation. | Pay online |
| Online credit/debit card | The county lists a 2.3% fee for online card payments. | Review fee → verify total → pay with card → save receipt. | Pay by card online |
| Phone payment | Call 240-777-8898. E-check is listed with no fee; card payment has a 2.45% phone fee. | Have bill/account number ready → call → follow prompts → record confirmation. | Phone: 240-777-8898 |
| In-person payment | The county lists check, credit/debit card, and cash. Money orders are not accepted. | Bring bill/payment slip → visit Treasury → pay → keep receipt. | 27 Courthouse Square, Suite 200, Rockville, MD 20850 |
| Mail payment | Mail a check with the payment slip from the bottom of the tax bill. Money orders are not accepted. | Write check → include payment slip → mail early → confirm posting. | Montgomery County, MD, P.O. Box 5561, Binghamton, NY 13902-5561 |
Important payment warning: Montgomery County says taxes are not considered paid until the remitted funds clear the county’s bank account. The person scheduling payment is responsible for entering accurate information.
Proof tip: The county notes that a cancelled check can act as proof of payment. For online or phone payment, save the confirmation number and check the bill record again after processing.
Montgomery County Maryland Property Tax Due Dates
Montgomery County property taxes are normally tied to the July tax bill cycle. Annual bills and the first semi-annual installment are due September 30. If you pay semi-annually, the second installment is due December 31.
- Open the real property tax portal.
- Search by account number, bill number, or address.
- Open the bill detail page.
- Check whether the bill is annual or semi-annual.
- Confirm the amount due by the date shown before paying.
| Bill Type | Main Due Date | What to Do |
|---|---|---|
| Annual real property tax bill | September 30 | Pay the full annual amount by the due date shown on the bill. |
| Semi-annual first installment | September 30 | Confirm installment status and pay the first amount by the date shown. |
| Semi-annual second installment | December 31 | Re-check balance before paying because prior payments or escrow may have posted. |
| Recent payment not showing | Processing can take time | Check with your financial institution. If not applied after 10 days, contact MC311. |
No-postmark warning: Montgomery County says it does not honor postmark dates. Payments are posted as received, so mailed checks should be sent early enough to arrive before the deadline.
How to Read a Montgomery County Real Property Tax Bill
A Montgomery County real property tax bill can include more than one tax line. The bill may show state property tax, county property tax, solid waste charges, water quality protection charge, prior payments, interest, and total amount due.
| Bill Field | What It Means | Why It Matters |
|---|---|---|
| Levy Year | The fiscal year or tax levy year for the bill. | Do not compare bills from different levy years as if rates and credits are identical. |
| Tax Period | The covered period, often July 1 through June 30. | Useful for buyers, sellers, escrow review, and proration questions. |
| Account Number | The real property tax account identifier. | Use it for search, payment, and record matching. |
| Tax Class | A classification used in billing and tax calculation. | Wrong classification can affect how the bill is understood. |
| State Property Tax | A Maryland state tax line on the county bill. | It is separate from the county property tax line. |
| County Property Tax | The county tax line used for local services and county obligations. | This is usually a major part of the bill. |
| Non-tax charges | Charges such as solid waste or water quality protection may appear. | These can raise the amount due even when tax rates are unchanged. |
| Prior payments and interest | Shows payments already posted and any interest line. | Check this before paying again. |
Montgomery County Property Tax Rate, Assessment and Charges
There is not one simple Montgomery County property tax number for every property. Your bill can include county tax, Maryland state tax, municipal tax if you are inside a city or town, special district charges, refuse charges, and water quality protection charges.
Maryland’s tax rate table for 2025–2026 lists a countywide Montgomery County real property tax rate column and a Maryland state real property tax rate column. Municipalities such as Rockville, Gaithersburg, Takoma Park, Chevy Chase villages, Kensington, Poolesville, Garrett Park, and others can have separate municipal rates.
- Open Montgomery County’s estimated real property tax tool.
- Enter the account number or street address.
- Review estimated real property tax and non-tax charges.
- Check whether the property is in a development tax district or proposed development tax district.
- Use the result as an estimate, not a final bill.
Funds county services and appears as a separate line on the bill.
Maryland state property tax can appear as its own bill line.
City or town tax may apply if the property is inside a municipality.
Refuse, water quality, development district, or special charges may affect the final amount.
Montgomery County Maryland Property Tax Credits and Exemptions
Property tax relief can come from state programs, county supplements, and targeted relief for certain homeowners. The most important step is to identify which program fits your situation and whether you must apply through Maryland SDAT or a county process.
| Credit or Exemption | Who Should Review It | Key Detail | Official Action |
|---|---|---|---|
| Maryland Homestead Tax Credit | Homeowners using the property as a principal residence. | Maryland requires a one-time application to establish eligibility. | Apply through Maryland OneStop |
| Maryland Homeowners’ Property Tax Credit | Homeowners with limited household income and net worth. | State program rules include household income and net worth limits and generally apply only to the first portion of assessed value. | Review SDAT Homeowners Credit |
| Montgomery County Supplement to HOTC | Homeowners who qualify for the state Homeowners’ Tax Credit and may receive county supplement relief. | County Council approved expanded eligibility including higher income, net worth, and assessed-value thresholds. | Read County Credit Expansion |
| Disabled Veteran’s Property Tax Exemption | Veterans with 100% permanent and service-connected disability, and certain qualifying surviving spouses. | This is tied to state law and SDAT application rules. | Review Disabled Veteran Exemption |
| Disabled Veteran’s Property Tax Credit | Veterans with severe but less than 100% service-connected disability who meet county rules. | County legislation described 25% credit for 50–74% disability and 50% credit for 75–99% disability, with income rules. | Read Disabled Veteran Credit |
| Blind Persons / Disabled Veterans state relief | Property owners who may be exempt under Maryland law. | MC311 says some exempt owners can apply for refunds for up to past three years. | Review MC311 Exemption Help |
Credit timing warning: Maryland SDAT says homeowners who file and qualify by April 15 may receive the credit directly on the bill. Later filings up to the October 1 deadline may result in a revised bill. Do not delay payment only because you are waiting for a credit.
Homestead Credit vs Homeowners’ Tax Credit
These two programs are often confused. The Homestead Tax Credit is mainly about limiting taxable assessment increases on a principal residence after eligibility is established. The Homeowners’ Property Tax Credit is income-based relief for eligible homeowners.
| Program | Main Purpose | Common Mistake |
|---|---|---|
| Homestead Tax Credit | Helps limit taxable assessment increases for an eligible principal residence. | Assuming it is automatic without the required one-time eligibility application. |
| Homeowners’ Property Tax Credit | Income-based credit for eligible homeowners whose taxes exceed a percentage of income. | Assuming every homeowner qualifies regardless of income and net worth. |
| County Supplement | Local Montgomery County supplement tied to the state Homeowners’ Tax Credit framework. | Missing county supplement eligibility after only checking state-level rules. |
If You Just Bought a Montgomery County Home
New buyers should not rely only on the seller’s old tax bill. A prior owner may have had credits, exemptions, municipal status, or non-tax charges that do not apply the same way after purchase.
- Use the county estimated real property tax tool by account number or street address.
- Compare the estimate with your lender escrow calculation.
- Check whether the property is inside a municipality or special district.
- Review refuse, water quality, development district, and non-tax charges.
- Apply for the Homestead Tax Credit if this is your principal residence and you have not filed.
- Save your closing statement, escrow disclosure, tax bill, and county estimate together.
Buyer tip: The county’s estimated tax tool is useful because it includes real property tax and other non-tax charges a buyer may pay in the first full fiscal year of ownership.
Mortgage Escrow Checklist
If your mortgage company pays property taxes, do not assume payment posted just because money was collected in escrow. County payment status and lender escrow collection are separate records.
Common Montgomery County Property Tax Mistakes to Avoid
These mistakes create avoidable late fees, duplicate payments, and confusion when owners try to pay or dispute a bill.
The official portal says to use the street address without suffix, such as “123 MAIN.”
The county posts payments as received and does not honor postmark dates.
Check posted payment status before sending a personal payment.
Online and in-person card payments have a listed 2.3% fee, and phone card payments have a listed 2.45% fee.
The county payment page says money orders are not accepted for mail or in-person payment.
Homestead, Homeowners’ Tax Credit, county supplement, veteran credit, and state exemptions are different programs.
Assessment Appeals and Property Value Questions
If your concern is the assessment, tax class, property description, or taxable value, the payment office may not be the right first contact. Montgomery County bills connect to Maryland SDAT assessment data, and assessment appeals follow state assessment rules.
- Open your Montgomery County tax bill detail.
- Use the state assessment data link when available.
- Compare assessed value, phase-in value, property class, and property details.
- If the assessment appears wrong, review Maryland SDAT assessment appeal resources.
- Keep payment due dates separate from appeal deadlines.
Important: An assessment appeal does not automatically erase a tax bill. If a payment is due, verify payment rules while the assessment issue is being reviewed.
Late Taxes, Tax Lien Sale and Unpaid Bills
If you have unpaid Montgomery County property taxes, act quickly. Tax lien sale and delinquent balance issues can become time-sensitive. Always compare any notice with the official county bill record before paying or ignoring it.
- Open the real property tax portal.
- Search by account number, bill number, or street address.
- Review unpaid bills, interest, and amount due.
- Check whether a tax lien sale warning applies.
- Contact MC311 or the Department of Finance if the record does not match your payment proof.
Urgent note: If you received a tax lien sale notice, foreclosure notice, bankruptcy notice, estate notice, or legal deadline, use official county/state sources and qualified professional help.
Before You Visit or Call Montgomery County Treasury
Calling or visiting is easier when you have the right documents. Bring or prepare the bill, account number, payment proof, and any escrow or credit documents connected to the issue.
Account number, bill number, property address, levy year, and tax period.
Cancelled check, online confirmation, bank record, payment slip copy, or county receipt.
Mortgage statement, escrow disbursement record, or servicer confirmation.
Homestead application, Homeowners’ Credit documents, veteran documentation, or SDAT correspondence.
Montgomery County Property Tax Office Contact and Map
Maryland SDAT lists Montgomery County’s tax billing and collection office as the Department of Finance, Division of Treasury, Property Tax Section.
Montgomery County Department of Finance
Division of Treasury, Property Tax Section
27 Courthouse Square, Suite 200
Rockville, Maryland 20850
Phone: 240-777-0311
Fax: 240-777-8947
Related Property Tax Guides on This Site
These internal guides can help you understand general property tax concepts before taking account-specific action on the Montgomery County or Maryland SDAT websites.
Official Montgomery County and Maryland Property Tax Links
Use these official sources when you are ready to search, pay, estimate, apply for credit, check assessment data, or contact the correct office.
Montgomery County Maryland Property Tax FAQs
How do I search my Montgomery County Maryland property tax bill?
Use the official Montgomery County real property tax portal. You can search by 8-digit bill number, 8-digit account number, or street address without the street suffix.
How do I pay Montgomery County property tax online?
Search your bill in the official portal, confirm the property and balance, then choose electronic check or card payment. Electronic check is listed with no fee; online card payment has a listed processing fee.
What are Montgomery County property tax due dates?
Annual bills and the first semi-annual installment are due September 30. The second semi-annual installment is due December 31.
Does Montgomery County honor postmark dates?
No. Montgomery County says it does not honor postmark dates. Payments are posted as received, so mailed payments should arrive before the due date.
Can I pay by phone?
Yes. The county lists phone payment at 240-777-8898. Electronic check is listed with no fee, while card payment by phone has a higher listed processing fee.
Can I pay in person?
Yes. The listed in-person location is 27 Courthouse Square, Suite 200, Rockville, MD 20850. The county lists check, card, and cash as in-person payment options, and says money orders are not accepted.
Where do I mail a Montgomery County property tax payment?
The county payment page lists mail payments to Montgomery County, MD, P.O. Box 5561, Binghamton, NY 13902-5561, with the payment slip from the bottom of the tax bill.
What information appears on a Montgomery County property tax bill?
The bill can show levy year, tax period, account number, tax class, property address, state property tax, county property tax, charges, prior payments, interest, total amount due, and tax rate per $100 of assessment.
What is the Homestead Tax Credit?
The Maryland Homestead Tax Credit helps limit taxable assessment increases on an eligible principal residence. Maryland requires a one-time eligibility application.
What is the Homeowners’ Property Tax Credit?
The Maryland Homeowners’ Property Tax Credit is an income-based credit for eligible homeowners. It is different from the Homestead Tax Credit.
Does Montgomery County have a county supplement to the Homeowners’ Tax Credit?
Yes. Montgomery County has a supplement tied to the state Homeowners’ Tax Credit. County Council approved expanded eligibility, including higher income, net worth, and assessed-value thresholds.
Can disabled veterans receive property tax relief?
Yes. Certain disabled veterans may qualify for exemption or credit depending on disability rating, state rules, county rules, and application requirements.
Why is my Montgomery County property tax bill higher than expected?
The bill may be affected by assessment changes, phase-in value, state tax, county tax, municipal tax, refuse charge, water quality protection charge, special district charges, lost credits, or prior unpaid amounts.
What should a new home buyer check?
New buyers should use the county estimated tax tool, review city or district status, check non-tax charges, verify escrow setup, and file the Homestead Tax Credit application if the home is their principal residence.
Who handles Montgomery County property tax billing?
Maryland SDAT lists Montgomery County Department of Finance, Division of Treasury, Property Tax Section, at 27 Courthouse Square, Suite 200, Rockville, MD 20850, phone 240-777-0311.
Is CountyPropertyTaxes.us the official Montgomery County tax office?
No. CountyPropertyTaxes.us is an independent informational guide. Use official county or Maryland SDAT sources for final payments, account-specific balances, credits, exemptions, and appeals.
Bottom Line
For Montgomery County Maryland property tax, search the bill first, confirm the account and address, review charges and due dates, check credits or exemptions, verify escrow status, then pay only through the official county payment route that fits your situation.
Find My BillHow to PayDue DatesCreditsOfficial Links