Suffolk County (Boston) Property Tax: Abatements (2026)

There Is No Suffolk County Assessor

Massachusetts does not assess property taxes at the county level. Suffolk County is a geographic label covering four separate cities and towns — Boston, Chelsea, Revere, and Winthrop — and each one runs its own assessing department, sets its own tax rate, and processes its own abatements. There is no "Suffolk County Assessor's Office" to contact. If you own property in Boston, which holds the overwhelming majority of Suffolk County's parcels and value, your assessment and any abatement filing go through the City of Boston Assessing Department. If your property is in Chelsea, Revere, or Winthrop, you'll need that city's own assessing office instead — this guide focuses on Boston, since that's almost certainly what you're looking for.

Quick Answer

If you think your Boston property's assessed value is too high, you file an abatement application with the Boston Assessing Department — not an "appeal." For Fiscal Year 2027, that application must be filed after your third-quarter tax bill and no later than February 1, 2027. You can file by mail or in person at the Assessing Department, Room 301, 1 City Hall Square, Boston, MA 02201. If Boston denies your abatement, you can escalate to the state's Appellate Tax Board within three months of that decision.

How Assessment Works in Massachusetts

Every city and town assesses property as of January 1 for the fiscal year that follows. Massachusetts runs on a July 1–June 30 fiscal year, so the value assessed on January 1, 2026 governs your Fiscal Year 2027 tax bill (July 2026–June 2027). Assessors are required to value property at "full and fair cash value," and that valuation — not your purchase price or a neighbor's opinion — is what any abatement challenges.

Boston bills quarterly. Your first two bills each year are preliminary estimates based on the prior year's value and rate; your third-quarter bill, typically issued in late December, is the first one to reflect the current fiscal year's actual assessed value and tax rate. That's intentional: the abatement window is built around that third-quarter bill, because it's the first bill that shows you the number you'd actually be contesting.

Abatements, Not Appeals

Massachusetts law calls this process an abatement, and that's the term the forms and the Assessing Department use — "appeal" isn't wrong colloquially, but if you search or call using "appeal" you may not find the right form. An abatement application asks the assessors to reduce your assessed value (and therefore your tax) because it's overstated, because the property is misclassified, or because you qualify for a statutory exemption you didn't receive. You can only apply for the current fiscal year — Massachusetts doesn't allow retroactive abatement applications for past years.

How to File a Boston Abatement

1. Wait for your third-quarter tax bill. You cannot file before it's issued, and the filing period formally opens January 1.
2. Get the forms. The Abatement Application and an Information Requisition Form (plus a Statutory Exemption Information Requisition Form if a statutory exemption is involved) are available through the Boston Property Lookup tool at properties.boston.gov, or by calling the Assessing Department at 617-635-4288.
3. File by February 1, 2027 (or the first business day after, if that date falls on a weekend or holiday) for Fiscal Year 2027. File by mail or in person at Assessing Department, Room 301, 1 City Hall Square, Boston, MA 02201, weekdays 9 a.m.–5 p.m. You can also file at the Taxpayer Referral and Assistance Center (TRAC) on the mezzanine level of City Hall.
4. Respond to any information request within 30 days. If the Assessing Department asks for supporting documentation and you don't provide it in time, your application can be denied on that basis alone.
5. Wait for a decision. The department has up to three months to act on your application.
6. Keep paying your bill on time. Filing an abatement does not pause or excuse your quarterly tax payments — if you win, any overpayment is credited or refunded.

If You're Denied: The Appellate Tax Board

If Boston denies your abatement, or simply doesn't act within the three-month review period, you have three months from the date of that decision to appeal to the Massachusetts Appellate Tax Board (ATB), the state body that hears these disputes. The ATB is a formal, independent tribunal separate from the city — it's not an internal city appeals step. Details on filing with the ATB, including its forms and formal vs. informal procedure options, are at mass.gov.

Boston's Residential Exemption

If you own and occupy your Boston property as your primary residence, apply for the residential exemption — it's separate from an abatement and reduces your tax bill by excluding a portion of your property's value from taxation. Last fiscal year, it saved qualifying Boston homeowners up to $4,353.74 on their tax bill; actual savings depend on your property's value and the residential tax rate. For Fiscal Year 2027, you generally qualify if you recorded your deed and occupied the property as your primary residence between January 1 and June 30, 2026. The filing deadline for Fiscal Year 2027 is April 1, 2027. This exemption is not automatic — you must apply every year through the Assessing Department.

Boston Tax Rates

Boston sets two separate property tax rates each fiscal year — one for residential property and a higher one for commercial and industrial property. For Fiscal Year 2026, the rate was $12.40 per $1,000 of assessed value for residential property and $26.96 per $1,000 for commercial/industrial property. The Fiscal Year 2027 rate isn't set until the city certifies its new valuations, which typically shows up on the third-quarter bill issued in late December 2026 — so if you're estimating a bill for the coming year, treat the FY2026 rate as a reference point, not a guarantee.

When Your Tax Bill Is Actually Due

This is separate from your abatement deadline, and it's worth being explicit about the difference: your abatement application deadline (February 1) happens to fall on the same date as one of your quarterly tax payments, but they are not the same thing — paying your bill does not file an abatement, and filing an abatement does not excuse paying your bill. Boston's four quarterly due dates are:

• August 1 — first-quarter preliminary bill
• November 1 — second-quarter preliminary bill
• February 1 — third-quarter actual bill (reflects the new fiscal year's assessed value and rate)
• May 1 — fourth-quarter actual bill

Each due date shifts to the next business day if it falls on a weekend or holiday.

Other Exemptions and Relief Programs

Boston offers several statutory exemptions beyond the residential exemption, all administered under the same general filing window (April 1 for Fiscal Year 2027, or three months after your actual tax bill is mailed if that's later):

• Elderly exemption (Clause 41C) — property tax relief for qualifying older homeowners, subject to age, ownership, and income/asset tests set by the Assessing Department.
• Veterans exemption (Clause 22) — for veterans meeting service and disability criteria defined by state law.
• Blind exemption (Clause 37A) — for legally blind property owners.
• Senior property tax work-off program — lets qualified older homeowners offset up to $2,000 of their tax bill by volunteering for the city.
• Senior tax deferral — instead of an exemption, lets homeowners 65 or older who've owned and lived in their home at least 5 years (and lived in Massachusetts at least 10 years), with gross income at or below a set threshold (currently $75,000, subject to annual adjustment), defer paying property taxes. Deferred taxes accrue interest at 1% and become due when the property is sold, transferred, or the owner dies; the total deferred amount is capped at half your ownership share of the property's assessed value.

Because exact income and asset limits for the elderly, veterans, and blind exemptions change and depend on individual circumstances, confirm current figures directly with the Assessing Department (617-635-4287) or TRAC before applying — Grove Hopper doesn't file these on your behalf.

Look Up Your Property Record

Before filing anything, pull your own record. Boston's Property Lookup tool at properties.boston.gov shows your current and historical assessed value, your property record card, abatement and exemption forms, and your tax bill history. It's the same tool the Assessing Department uses, so it's the most reliable starting point for checking whether your assessment looks out of line with comparable properties.

If You're in Chelsea, Revere, or Winthrop

These three cities also sit in Suffolk County but are assessed entirely independently of Boston, with their own rates, deadlines, and assessing offices. The Massachusetts-wide abatement framework described above — January 1 assessment date, abatement filing tied to the actual tax bill, three-month window to appeal to the Appellate Tax Board — applies to all of them, but the specific deadlines and forms come from each city's own assessor, not Boston's.