The Massachusetts property tax calculator gives you a fast, reliable estimate of your annual and monthly property-tax bill based on your home value and the state’s average effective rate. Whether you are buying a home in Boston, comparing suburbs before a move, or refinancing in Worcester, you can see exactly what to budget in seconds — no spreadsheet required.
How the calculation works
Massachusetts is unusual among US states: the law requires every city and town to assess property at 100% of full cash value (fair market value). There is no discounted assessment ratio applied to residential property the way Alabama uses 10% of market value, for example.
Each municipality’s board of assessors sets an annual tax rate expressed as dollars per $1,000 of assessed value. That rate is certified by the Massachusetts Department of Revenue / Division of Local Services every year.
The effective rate used in this calculator collapses everything into one percentage:
Effective rate = total tax paid / market value
So when this tool quotes Massachusetts’s statewide average of 1.12%, it means that on average Massachusetts homeowners pay $11.20 in annual property tax for every $1,000 of their home’s market value. The formula is:
Annual tax = home value x (effective rate / 100)
Monthly tax is the annual figure divided by 12.
Worked example
Suppose you purchase a home in Framingham for $600,000. Framingham’s average effective rate is approximately 1.20%.
- Annual property tax: $600,000 x 0.0120 = $7,200
- Monthly property tax: $7,200 / 12 = $600
- Tax per $1,000 of value: $12.00
Compare that to the statewide average of 1.12%: the same $600,000 home at the state average would generate an annual bill of roughly $6,720 — a $480-per-year saving just from location. Across town lines, Springfield at 1.98% would push the same $600,000 home to $11,880 per year, or $990 per month — a striking $4,680-per-year difference from Framingham.
| Home value | Location | Eff. rate | Annual tax | Monthly |
|---|---|---|---|---|
| $500,000 | Statewide avg | 1.12% | $5,600 | $467 |
| $500,000 | Boston | 0.55% | $2,750 | $229 |
| $500,000 | Worcester | 1.56% | $7,800 | $650 |
| $750,000 | Statewide avg | 1.12% | $8,400 | $700 |
| $750,000 | Springfield | 1.98% | $14,850 | $1,238 |
All figures are calculated in your browser — nothing is uploaded or stored.
Why Massachusetts property taxes vary so much by city and town
Unlike states with a uniform millage structure, Massachusetts delegates nearly all property-tax decisions to its 351 cities and towns. Each municipality sets its own rate, adopts (or declines) the residential exemption, and manages its own revaluation cycle. This creates a wide spread:
- Boston and Cambridge have high property values but keep rates low partly because of a large commercial tax base and partly because state aid supplements local budgets. The residential exemption further reduces bills for owner-occupants in these cities.
- Post-industrial cities like Lawrence, Springfield, and Brockton have lower property values but historically high rates because they rely almost entirely on property tax to fund schools and services with limited commercial base.
- Affluent suburbs such as Wellesley, Weston, and Concord sit in the 0.80-1.00% range — low rates on high values produce moderate-to-high absolute bills.
- Cape Cod and Islands (Nantucket, Chilmark) have very low rates but extremely high median values; a modest-rate home can still generate a large absolute tax bill.
What can reduce your Massachusetts property-tax bill
Several mechanisms can lower what you actually pay:
- Residential exemption. Adopted by about 20 municipalities including Boston, Cambridge, Somerville, and Chelsea. Can cut assessed value by up to 35% for qualifying owner-occupants, meaningfully reducing the bill.
- Circuit Breaker Credit. A Massachusetts state income-tax credit for homeowners and renters aged 65+ whose property tax or rent exceeds 10% of their income. Worth up to $2,190 (2024 cap).
- Personal exemptions. Statutory reductions for veterans, surviving spouses, seniors (age 70+), and blind individuals, ranging from $175 to $500 off the tax bill annually.
- Abatement applications. If you believe your assessed value exceeds fair market value, you can file for an abatement with the local board of assessors by the deadline (usually February 1 in most towns).
This calculator gives you the right ballpark for budgeting; your local assessor gives you the exact figure and the list of exemptions you qualify for.