Educational preview. Massachusetts is not a live FairAppeal market.
If the number on your Cambridge bill looks high, the Assessing Department hears that question. The deadline is usually within thirty days of when the first fall bill is mailed.
A Cambridge abatement is due with the first actual tax bill of the fall, usually within thirty days of that bill's mail date, and it is heard by the Cambridge Assessing Department.
Cambridge, MA · Middlesex County
A Cambridge number can look high when lab, condo, and triple-decker sales pull streets the model never walked. Values are set as of January 1, and the tax follows that figure until someone takes it up with Assessing. The city bills twice a year; the first fall bill starts the clock.
Cambridge bills twice a year. An abatement is due with the first actual fall installment, within thirty days of that bill's mail date. FY26 bills mailed November 7 and closed December 8. The printed due date on the fall bill is the one that controls.
The Cambridge Assessing Department. Assessed-value questions stay with the city, not a Middlesex County board. If the city does not resolve it, the next rung is the state's Appellate Tax Board. Residential exemptions are a different program on a different clock.
Cambridge values property as of January 1 using sales across a dense market of condos, labs, and older triple-deckers. A sale two blocks over can lift a quieter street with it. The tax bill then follows that January 1 number until someone takes it up.
Not yet. Massachusetts is not a live FairAppeal market. When it is, there are no upfront costs. You pay only if FairAppeal saves you money, and the fee is a percentage of your first year's tax savings. Until then, this page is only the Cambridge clock, not a filing kit.
The Assessing Department cannot take a late abatement. A new fiscal year brings a new January 1 value and a new fall clock. There is no makeup window inside the same fiscal year. The next chance is the next fall bill.