Acton, Middlesex County, Massachusetts Property Taxes
Property Taxes in Acton, Massachusetts
Median Acton, Massachusetts effective property tax rate: 1.72%, significantly higher than the national median of 1.02%, and higher than the Massachusetts state median of 1.15%.
Median Acton, Massachusetts home value: $743,950
Median annual Acton, Massachusetts tax bill: $12,753, $10,353 higher than the national median property tax bill of $2,400.
How are property taxes in Middlesex calculated?
Property taxes in Acton, Massachusetts are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding Acton’s property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Acton, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Acton, Middlesex County, Massachusetts Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
1.72%
Estimate Property Tax Bill
$12,796
$11,874
How Does the Acton Property Tax Calculator Work?
Use this Acton property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Acton's median effective tax rate of 1.72% — based on actual property records in Middlesex County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local assessment system uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Acton's median effective rate across all local levies, providing a more accurate estimate than applying a single county rate.
Your bill may vary by ZIP code within Acton: rates range from $7,383 in 01718 to $12,928 in 01720, primarily due to differences in school district levies and local assessment districts.
For a more precise estimate, scroll down to explore ZIP code-level tax rate trends across Acton.
About Acton Property Taxes
About Property Taxes in Acton, Middlesex, Massachusetts
Acton’s median effective property tax rate of 1.72% is higher than the Massachusetts state median of 1.15% and higher than the national median of 1.02%. This rate reflects the Middlesex County base levy combined with local school district levies and special assessment districts that vary by subdivision throughout the city.
Property tax rates are not uniform across Acton. Homeowners in the 01718 ZIP code carry a median effective rate of 1.72%, while those in 01720 pay 1.72%. Even when the rate is the same, assessed values and local tax bills can still differ across the city, with a median home price of $743,950 and a median tax bill of $12,753.
Acton homeowners who believe their assessed value is too high can file a formal appeal with the Tax Assessor before the February 1, 2026 deadline each year.
If your estimated bill seems higher than expected, Ownwell can review your assessment and protest on your behalf. You only pay if we save you money.
Property Tax Rates Across Acton, Middlesex County, Massachusetts
As noted earlier, local government entities set tax rates, which can vary widely within a state.
Why? Because annually, each county estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction. This calculation results in the property tax rate.
While there are votes and laws involved in setting tax rates and budgets, in a nutshell, this is the annual process.
Below, you can compare Acton's effective property tax rate to other cities in Massachusetts and the median property tax rates in Massachusetts and the U.S.
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Acton Tax Rate
1.72%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Middlesex County Tax Rate
1.14%
Median Effective Massachusetts Tax Rate
1.15%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Acton, Middlesex County, Massachusetts
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 01718 | 1.71% | 1.71% | 1.72% | 1.72% | 1.72% |
| 01720 | 1.71% | 1.71% | 1.72% | 1.72% | 1.72% |
Source: Ownwell
Property Tax Assessment Values Across Acton, Middlesex County, Massachusetts
When examining property taxes in Acton, Massachusetts, understanding the distinction between "market value" and "assessed value" is crucial.
The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The Middlesex County assessment office estimates the market value for tax purposes.
The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
Assessment notices are sent in the spring each year and typically reach your mailbox by the middle of the month. Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill.
For example, the median home price in Acton is $743,950, with tax bills ranging significantly across the county. Zip code 01720 has the highest median home price at $754,300. The median tax bill in Acton is $12,753, compared with the national median property tax bill of $2,400.
Property Tax Assessment Values Across Acton, Middlesex County, Massachusetts
Source: Ownwell
$378,900
$1,063,575
$1,748,250
Median Acton Market Value
$743,950
Median Middlesex County Market Value
$710,700
Median Massachusetts Market Value
$561,600
Median United States Market Value
$235,294
Property Tax Assessment Values Across Acton, Middlesex County, Massachusetts
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 01718 | $355,200 | $393,600 | $430,500 | $458,100 | $483,800 |
| 01720 | $258,700 | $579,900 | $754,300 | $946,350 | $1,143,800 |
Source: Ownwell
Property Tax Bills Across Acton, Middlesex County, Massachusetts
Property tax bills in Acton are based on the assessed value of a home and the local tax rate set by the municipality. When a property’s assessed value rises, the tax bill can increase as well, even if the homeowner has not made any changes to the home. For many homeowners, this means the bill reflects both the market value of the property and local budget needs.
In Acton, the median home price is $743,950, and property tax bills can vary widely across the city. The median tax bill in the highest-burden ZIP code is $12,928, while the lowest median tax bill is $7,383. That spread shows how location within the city can affect what homeowners pay.
Compared with the national median property tax rate of 1.02% and the national median property tax bill of $2,400, Acton homeowners generally face much higher property tax costs.
Median Acton Tax Bill
$12,753
Median Middlesex County Tax Bill
$7,377
Median Massachusetts Tax Bill
$6,068
Median United States Tax Bill
$2,400
Property Tax Bills Across Acton, Middlesex County, Massachusetts
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 01718 | $6,092 | $6,750 | $7,383 | $7,856 | $8,297 |
| 01720 | $4,437 | $9,932 | $12,928 | $16,228 | $19,614 |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | February 1 |
Links | |
|---|---|
| Middlesex Tax Assessor | |
| Website | www.masslandrecords.com |