Why Your Property Tax Bill Rose in Western Mass While the Rate Fell

Every spring somebody in this region opens a tax bill, sees that the town lowered its rate, and finds they owe more than last year. It reads like a mistake. It is not one, and the reason is the single most useful thing to understand about a Massachusetts property tax bill.

The rate is a divisor, not a price. It is the amount charged per $1,000 of assessed value, and it is set by dividing what the town has to raise by what the town is worth. When the second number grows, the first can fall while the bill behind it climbs.

What actually moved in twenty years

Across 101 towns, the median residential rate went from $12.92 to $14.20 per $1,000. That is a move of 7% over two decades. Not a cut, and not much of a rise either.

In the same twenty years the median average single family value rose from $201,774 to $377,900, a rise of 86%. The median bill went from $2,590 to $5,146.

So the bill roughly doubled, and almost none of that came from the rate. It came from the valuation underneath it. 100 of the 101 towns send a larger average bill than they did in 2006.

The line climbs at almost exactly the rate the assessed value underneath it climbed, because the bill is that value multiplied by a number that barely changed. Over the same period the median value went from $201,774 to $377,900, which is the shape you are looking at.

The towns where the rate really did fall

This is the part worth being precise about, because the loose version of it is wrong. 24 of the 101 towns charge a lower residential rate today than in 2006. Not most of them. In 23 towns the rate fell and the bill went up anyway, and those are the households the opening paragraph describes.

• New Ashford cut its rate from $7.92 to $5.66, a fall of 29%. The average assessed value rose 173%, and the average bill went from $1,431 to $2,795.
• Windsor cut its rate from $12.80 to $9.43, a fall of 26%. The average assessed value rose 87%, and the average bill went from $2,065 to $2,846.
• Leyden cut its rate from $18.77 to $14.69, a fall of 22%. The average assessed value rose 87%, and the average bill went from $3,497 to $5,127.
• Alford cut its rate from $4.95 to $4.07, a fall of 18%. The average assessed value rose 149%, and the average bill went from $2,535 to $5,191.

Nobody in those towns was misled. The rate genuinely fell. The house was simply reassessed upward by more than the rate came down, which is arithmetic rather than policy.

Why a town cannot just raise the rate

Proposition 2 1/2 caps the total amount a Massachusetts municipality may raise from property tax, and it caps the growth of that total at 2.5% a year plus whatever new construction adds. The cap is on the levy, not on the rate and not on your bill.

That is why a revaluation year can move a rate sharply in either direction without changing what the town collects. If every house in town doubled in value overnight and the town needed the same money, the rate would halve. Rates and bills move for different reasons, and reading one as a proxy for the other is the mistake this page exists to correct.

What does raise the total is a vote. An override or a debt exclusion lifts the cap, and both take a ballot. A town's certified reserves are usually the number argued about when one is proposed.

Both years, every town

Sortable and filterable. The bar under each 2026 bill shows how far that town sits from this table's own middle, in either direction.

What this does not mean

An average is not your house. The average single family bill in a town is the total single family tax divided by the number of single family parcels, so a town with a few very large houses and many small ones reports an average that describes neither.

It also says nothing about whether an assessment is right. If you think yours is high, the comparison that matters is against what similar houses actually sold for, and recorded sales set against assessed values is where that starts. The window to do anything about it is short and statutory, which the abatement rules set out.

For one town rather than all of them, every record carries its own rate history, its median value and the bill that follows from both. Start at the town list, or run a figure through the tax bill calculator.