Total monthly cost of ownership
Cost to Own a Home in Potomac, Maryland
A $1,106,000 home here costs
$8,413per month, all in, with 20% down at today's 7.40% 30-year fixed rate. By the 28% rule that takes a household income of about $360,500 a year.
A standard mortgage calculator would have told you $6,126. The real number is $2,287 higher every month, 37% more than the payment most buyers budget for.
Compare Montgomery County with anywhere in America · full county breakdown
Where every dollar goes
Only the first line is a mortgage payment. Change any assumption above and every figure below recalculates.
Potomac against Montgomery County and Maryland
| Measure | Potomac | Montgomery County |
|---|---|---|
| Median home value | $1,105,900 | $615,200 |
| Median property tax | $9,862 | $5,341 |
| Effective tax rate | 0.892% | 0.868% |
| Median gross rent | $2,616 | $2,030 |
| Population | 46,230 | 1,057,586 |
The weather behind that power bill
Potomac sits in Montgomery County, which averages a high of 87.1°F in its hottest month and a low of 26.9°F in its coldest, with 41.32" of precipitation a year and 28% of it in a single three-month stretch. That climate drives 1,279 cooling and 4,455 heating degree days, which is what sets the $199 electricity line above.
See the full climate breakdown for Montgomery County , month by month temperatures, rainy season timing, snowfall and heating and cooling costs.
Other cities in Montgomery County
Full Montgomery County cost breakdown · Every county in Maryland
Talk to someone who works this market
These are Potomac averages. What one specific house costs to own, or what it would sell for today, depends on the street and the condition of the place. We will connect you with one licensed local agent who works Potomac every week. Free, no obligation, and we never sell your details to a list.
I'm looking to buy in Potomac I already own here and may sell
Common questions
How much does it cost to own a home in Potomac?
A $1,106,000 home in Potomac, Maryland costs approximately $8,413 per month with 20% down at 7.4%. That is $6,126 principal and interest, $822 property tax, $277 homeowners insurance, $267 utilities and $922 set aside for maintenance.
What is the property tax rate in Potomac?
Potomac has an effective property tax rate of 0.892%, based on a median home value of $1,105,900 and median real estate taxes of $9,862. That is higher than the Montgomery County average of 0.868%.
What is the average home price in Potomac?
The median owner-occupied home value in Potomac, Maryland is $1,105,900, against $615,200 across Montgomery County.
Is it cheaper to rent or buy in Potomac?
Median gross rent in Potomac is $2,616 a month, against $8,413 to own the median home all in. Renting costs less month to month here, though renting builds no equity.
What salary do you need to buy a home in Potomac?
Using the standard 28% rule, housing costs at no more than 28% of gross income, buying the median home in Potomac, Maryland at today's rate takes a household income of roughly $360,500 a year. That covers the full $8,413 monthly cost, not just the mortgage payment.
Sources & methodology
- Median home value, real estate taxes, gross rent and population for Potomac, US Census Bureau, American Community Survey ACS 2023 5-Year, place-level tables.
- Homeowners insurance, NAIC average premium for Maryland.
- Electricity price, EIA Electric Power Monthly Table 5.6.A.
- Mortgage rate, Freddie Mac PMMS, refreshed weekly.
- Maintenance (1%/yr) and water and sewer ($68/mo) are national estimates. Every assumption above is editable.