2026 Property Tax Due Dates
August 1
Q1 preliminary
February 1
Q3 actual (quarterly billing)
Payment Methods
Online, Mail, In-Person
Middlesex County Treasurer
How to Pay
Online
Pay using credit card or e-check
By Mail
Mail check payable to Middlesex County Treasurer
In Person
Visit the Treasurer's office
About Property Taxes in Massachusetts
Massachusetts property taxes are administered at the city and town level — the state has no county-level property tax. Each municipality has its own assessors who set values at 100% of fair cash value (market value). Massachusetts reassesses property values annually, though a full statistical analysis is required at least every three years. Property taxes in Massachusetts are moderately high and fund a significant share of public school costs. Major cities like Boston, Cambridge, and Worcester offer significant residential exemptions that substantially reduce taxes for owner-occupants compared to investors.
Payment & Assessment
Most Massachusetts cities and towns issue quarterly tax bills: First and second quarter: Preliminary bills based on prior year's tax; due approximately August 1 and November 1. Third and fourth quarter: Final bills based on current year's assessment; due approximately February 1 and May 1. Some smaller towns bill semi-annually. A demand charge of $30 plus 14% annual interest applies to late payments. Most cities and towns offer online payment through the municipal tax collector's website. Contact your local tax collector for available payment methods.
Statewide framework for Massachusetts. Your county's specific rates and deadlines are shown above.
Other Counties in Massachusetts
About Middlesex County
Middlesex County is a county located in the Commonwealth of Massachusetts, United States, one of fourteen in the state. As of the 2020 census, the population was 1,632,002, making it the most populous county in both Massachusetts and New England and the 20th most populous county in the United States. This makes the county the most populous county on the East Coast outside of New York or Florida. Middlesex County is one of two U.S. counties to be amongst the top 25 counties with the highest household income and the 25 most populated counties. It is included in the Census Bureau's Boston–Cambridge–Newton, MA–NH Metropolitan Statistical Area. As part of the 2020 United States census, the Commonwealth's mean center of population for that year was geo-centered in Middlesex County, in the town of Natick.
Source: Wikipedia — content available under CC BY-SA 4.0
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Due dates shown are for reference only. Contact your county treasurer's office to confirm official deadlines before making payments.