Massachusetts Property Tax Abatement — 2026 Guide
Deadline varies by county — check your county's appraisal district.
| Deadline | February 2, 2026 — G.L. c.59 §59 |
|---|---|
| Lien date | |
| Abatement body | Appellate Tax Board (ATB) |
| Primary form | State Tax Form 128 — Application for Abatement of Real Property Tax / Personal Property Tax |
| Portal | Varies by county |
| Can value increase | No — review body cannot increase value above current assessment |
How to Request an abatement of Your Property Tax Assessment in Massachusetts
The general abatement process in Massachusetts:
- Meet the deadline: An application for abatement (State Tax Form 128) must be filed with the local Board of Assessors on or before the last day for paying the first installment of the actual tax bill without incurring interest. In the quarterly-billing municipalities that make up most of Massachusetts, the actual tax bill's first installment is due February 1. Where February 1 falls on a Saturday, Sunday, or legal holiday it rolls to the next business day; February 1, 2026 is a Sunday, so the fiscal-year-2026 deadline is Monday, February 2, 2026. Filing the abatement application with the assessors is jurisdictional, and the deadline cannot be extended or waived by the assessors.
- File a abatement: Contact your county's ATB or file online through your county's online portal.
- Gather evidence: Market analysis, recent comparable sales, and documentation of property defects or errors.
- Attend your hearing: Present your evidence to the Appellate Tax Board.
- Escalate if needed: After the initial hearing, consider Appellate Tax Board (ATB) — or, alternatively, the county commissioners.
Evidence and Hearing Tips
Strong evidence for a Massachusetts property tax abatement typically includes comparable sales data, a recent licensed appraisal, and documentation of any property defects or errors in your assessment record.
Hearings are conducted by the Appellate Tax Board (ATB). Most abatements are resolved informally before a formal hearing.
General Property Tax Abatement Questions
- Is it worth appealing my property taxes?
- How do I appeal/protest my property taxes?
- When is the property tax appeal deadline in my state?
- What evidence do I need for a property tax appeal?
- Can my taxes go up if I appeal?
- Will appealing lower my home's resale value?
- How do I find comps for a property tax appeal?
- How much can I save by appealing?
- Do I need a lawyer to appeal property taxes?
- Why did my assessed value go up so much?
- What's the difference between market, assessed, and taxable value?
- What should I say at the hearing?
- How do I appeal property taxes without a lawyer?
- How much do tax protest companies charge?
- What goes in a property tax appeal letter or template?
- Can I appeal if I just bought the house?
- What if my square footage on the record is wrong?
- What happens at a property tax appeal hearing?
- I missed the deadline — what can I do now?
- What is the property tax appeal success rate?