What Middlesex County property tax looks like
Among the 30 counties covered here, Middlesex County has the 13th highest effective rate and the 1st highest median bill. Every $100,000 of value carries about $1,054 of tax a year at this rate.
On a $400,000 purchase that comes to roughly $4,216 a year, or $351 a month. Priced at the Massachusetts average rate instead, the same home would cost $19 a month more in tax.
Massachusetts has no county assessor: each of Middlesex County's cities and towns values property and sets its own rate, so the county median blends dozens of different rates.
Example monthly payment at the median home value
Borrowing $549,760 against a $687,200 Middlesex County home (20% down, 6.5% for 30 years, illustrative rather than quoted) works out as follows.
| Component | Per month |
|---|---|
| Principal and interest | $3,475 |
| Property tax | $604 |
| Homeowners insurance | $150 |
| Mortgage insurance (PMI) | $0 |
| Total | $4,228 |
Property tax is 14.3% of the $4,228 total, so a lender escrowing it would set aside about $604 each month toward the Middlesex County bill.
How reliable this figure is
For Middlesex County the Census Bureau reports a 90% margin of error of ±$41 on the $7,240 median tax and ±$3,534 on the $687,200 median value, so the 1.054% rate is a county-wide average rather than the rate on any one bill.
These medians describe today's owners, not today's buyers. How Massachusetts values and caps a home, including what resets on sale, is set out on the Massachusetts page.
Counties with a similar rate
Frequently asked questions
What is the property tax rate in Middlesex County, MA?
The effective rate is 1.054%, which is the median real estate tax paid ($7,240) divided by the median home value ($687,200) in the Census Bureau's 2019-2023 estimates.
How much is property tax on a $400,000 home in Middlesex County?
At this county's effective rate the figure is about $4,216 a year, or $351 a month. That is $19 a month less than the Massachusetts average rate of 1.11% would give on the same price.
How much of a Middlesex County monthly mortgage payment is property tax?
On a $687,200 home with 20% down at 6.5% over 30 years, property tax is about $604 of a $4,228 total monthly payment, or 14.3%.
Is property tax in Middlesex County high compared with the rest of Massachusetts?
Middlesex County's 1.054% is 0.06 percentage points below the 1.11% Massachusetts average, and its $7,240 median bill ranks 1st of the 30 counties covered here, with the rate ranking 13th.
Source and method
Census American Community Survey, ACS 2019-2023 5-year estimates, released December 2024. For Middlesex County: B25103 median tax $7,240, B25077 median value $687,200, B25003 388,864 owner-occupied homes. Formulas are on the methodology page; every result is an estimate, not a quote or tax advice.