Montgomery County, MD property tax deadlines
6 coming property tax dates for Montgomery County, Maryland. Each one links to its official source and shows the day LevyDay last checked it.
| Next dates | Bills due | Last day without penalty | Appeal by | Exemption filing |
|---|---|---|---|---|
| Montgomery | Dec 1, 2026mgaleg.maryland.govOct 24 | Dec 31, 2026mgaleg.maryland.govOct 24 | Set by noticemgaleg.maryland.govOct 24 | No date on fileState rulesread |
Deadlines in date order
| Date and source | Deadline |
|---|---|
| July 1 every yearmgaleg.maryland.govOct 24 | Bills due Bills due Due July 1. You can pay without interest through September 30. |
| September 30 every yearmgaleg.maryland.govOct 24 | Last day without penalty Pay the full year without interest Due July 1 and late after September 30. Second homes and rentals pay this way, since they can't split the bill. |
| September 30 every yearmgaleg.maryland.govOct 24 | Last day without penalty Split bill: first half Only for the home you live in, or business property with total taxes up to $100,000. |
| December 1 every yearmgaleg.maryland.govOct 24 | Bills due Split bill: second half due Only for the home you live in (or small business property) on the split bill. You can pay it without interest through December 31. |
| December 31 every yearmgaleg.maryland.govOct 24 | Last day without penalty Split bill: second half The second half is due December 1, and you can pay it without interest through December 31 (a service charge may still apply). Pay both halves by September 30 to skip the service charge. |
| Varies, see rule set by noticemgaleg.maryland.govOct 24 | Appeal deadline Appeal a new assessment 45 days from the date on your assessment notice. Appeal to the state assessment office supervisor. If you bought after January 1, you may have 60 days in some cases. |
Appealing your assessed value
Appeal by the date on your noticemgaleg.maryland.govOct 24
If you think the county valued your home too high, you can appeal. Filing with the county is free and you can do it yourself.
Get help filing an appeal
After you send your details, we look for an independent appeal firm or attorney to take your case. We'll be in touch once one has agreed. Firms usually charge a share of what you save, and the one that takes it may pay LevyDay a referral fee.
LevyDay doesn't file appeals or give legal or tax advice. We only pass your details on. The independent firm or attorney that takes your case does the work and sets its own fee.
Get help filing an appealGood to know in Maryland
- Paying late: Overdue county and city property tax bears interest at two thirds of 1% for each month or part of a month it's late. A few places, like Garrett County, have a different rate. More mgaleg.maryland.govOct 24
- Appealing your value: Your first appeal goes in writing to the supervisor of assessments. If you bought the property after January 1, you have 60 days from the transfer to appeal. More mgaleg.maryland.govOct 24
- Homestead exemption: The Homestead Tax Credit limits how much your taxable assessment can rise each year. Every county and city must hold increases to 10% or less, and some set a lower limit, like 2% in Anne Arundel County. More mgaleg.maryland.govOct 24
- Second homes and rentals: The homestead credit applies only to the owner's principal residence. More mgaleg.maryland.govOct 24
Free reminders from the county
- Montgomery County sends alerts about property tax billing and installment due dates by email or text if you sign up on its property tax page. Sign up with the county
Places in Montgomery County
Among them: Ashton-Sandy Spring, Aspen Hill, Barnesville, Bethesda, Brookeville, Brookmont, Burnt Mills, Burtonsville, Cabin John, Calverton, Chevy Chase, Chevy Chase Section Five, Chevy Chase Section Three, Chevy Chase View, Chevy Chase Village, Clarksburg, Cloverly, Colesville, Damascus, Darnestown, Derwood, Fairland, Flower Hill, Forest Glen, and 34 more. Every place in the county gets the dates above.
Nearby in the Maryland list
DorchesterFrederickGarrettHarfordHowardKentPrince George'sQueen Anne'sSt. Mary'sSomersetTalbotWashington