Massachusetts property tax at the effective rate real bills actually land at — 1.01% of value at the ACS 2025 medians — applied to your home’s value. Pilot counties included: Middlesex.
$379 a month
| Assessed value | $450,000 |
| Homestead exemption | $0 |
| Effective rate | 1.01% |
| Annual tax | $4,545 |
Massachusetts's median homeowner pays $6,345 on a $626,900 home — 1.01% effective (ACS 2025). Nominal rates mislead across states (assessment ratios differ); the effective rate is the honest comparator. Your parcel's bill follows its own assessment and the overlapping local levies.
Source: U.S. Census Bureau, ACS 2025 1-year estimates.
Proposition 2 1/2: a community's levy ceiling is 2.5% of total full-and-fair-cash value and its levy limit may grow only 2.5%/yr plus new growth (absent voter override/exclusion) - this limits the total levy, NOT individual bills, so do not apply it as a per-home 2.5% cap.
Source: state source in the research file (see hub).
This family is the pilot the plan called for: all 51 state pages plus the 25 most populous counties — not thousands of county pages with rates nobody verified. County figures here are the same ACS medians at county level.
County assessors publish parcel-level figures.
Assessments lag markets, exemptions differ (senior, veteran, disability), and local levies stack differently street by street. The effective-rate model gives the typical bill for the value, not your parcel's bill.
By effective rate, Illinois (1.92%) and New Jersey (1.82%); by median dollars, high-value states like New Jersey ($9,648) and California ($5,537) — the hub table shows both lenses.
Massachusetts Property Tax Calculator for 2026: at Massachusetts's 1.01% effective rate (ACS 2025), a $450,000 home pays about $4,545 a year. The state median bill is $6,345.
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What property tax typically costs in Massachusetts: the ACS 2025 effective rate applied to your home.
Massachusetts’s effective rate is 1.01%; the median bill is $6,345.
On the $450,000 test home the model gives $4,545 a year.
Typically $6,345 a year at the median (1.01% effective).
No — an effective-rate estimate; assessments and exemptions move real bills.
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