Average mortgage payment in Montgomery County, MD (2026)
The average mortgage payment in Montgomery County on a median-priced home (~$545,000) is roughly $4,256/month — assuming 10% down at a 6.85% 30-year fixed rate and Maryland's 1.09% effective property tax rate (full PITI).
To carry that payment under the standard 28% front-end DTI rule, you'd need an annual household income near $182,404. County population is roughly 1,062,061.
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How Montgomery County compares to Maryland
The typical home in Montgomery County is 28% above the statewide median of $425,000 in Maryland. Property tax is set at the state's effective rate of 1.09% — local millage and special assessments vary by county, but this is the right starting point.
The payment above bakes in principal, interest, property tax, and homeowners insurance — it does not include HOA dues or mortgage insurance (PMI). PMI kicks in automatically when down payment is below 20% on a conventional loan. For a full breakdown, run your own numbers in the main calculator.
Frequently asked questions
What is the average mortgage payment in Montgomery County?+
On a median Montgomery County home (~$545,000) at a 6.85% 30-year fixed rate with 10% down, all-in PITI runs about $4,256/month, including ~$495 in property tax.
What income do I need to buy a home in Montgomery County?+
Using the 28% front-end DTI rule, you'd need roughly $182,404 in annual gross household income to comfortably carry the median Montgomery County home.
How does Montgomery County compare to the rest of Maryland?+
Montgomery County's median home ($545,000) is 28% above the Maryland median of $425,000.
Does this include HOA fees or PMI?+
No. HOA dues vary too widely to assume a default — add them directly to the payment. PMI applies when you put less than 20% down on a conventional loan; the main calculator factors it in automatically.