Late in December, Boston mails its third-quarter property tax bills. That is the first bill of the fiscal year with the actual tax rate and actual assessed value on it. It is also the first bill that applies the residential exemption. If you closed on a Boston condo or house this fall, that envelope will probably still carry the previous owner's name. The amount on it will reflect the previous owner's situation too.
The reason sits in Massachusetts tax law. Boston's fiscal year 2027 runs from July 1, 2026, to June 30, 2027. Taxes for that year rest on who owned the property, what it was worth, and what condition it was in on January 1, 2026. The residential exemption is the city's largest tax break for people who live in the home they own, and it follows the same date. As a result, a buyer's first year of carrying costs in Boston depends partly on a person they may never meet. Two condos with the same price and the same assessment can cost noticeably different amounts to hold through next spring.
The exemption stays with the property for the whole fiscal year
The Massachusetts Division of Local Services covers this in its Ask DLS guidance on subsequent owners. Eligibility for the residential exemption "is determined as of the January 1 assessment and classification date." The guidance also says that any later change in ownership or occupancy "should not be considered" when assessors calculate that year's tax. DLS adds that exemptions are not prorated after a mid-year sale. The January 1 owner stays liable for the full fiscal-year tax, and in practice the buyer pays the bills issued after closing to avoid a tax taking.
That produces three different outcomes for someone who closed in Boston between July and December 2026:
| Who owned the home on January 1, 2026 | What the FY2027 bills after your closing reflect |
|---|---|
| An owner who lived there as a principal residence and qualified | The exemption is applied, and it stays for the full fiscal year even though that owner has moved out |
| An investor, a landlord, or an owner living elsewhere | No residential exemption, because the statute requires a principal residence |
| You, under the spring-purchase exception | Not you. That route covers only deeds recorded January 1 through June 30, 2026 |
The middle row is where buyers get caught off guard. In a building with a mix of owner-occupants and investor-owned units, the unit with a tenant moving out and the unit with an owner moving out can be listed in the same week at similar prices. Across the rest of fiscal 2027, they will not cost the same to own.
Spring buyers have a route that fall buyers do not
Boston has an exception that most Massachusetts municipalities lack. Under a 2018 state act specific to Boston, a buyer may be eligible for the current fiscal year by recording a deed at the Suffolk County Registry of Deeds and moving into the home as a principal residence between January 1 and June 30. For fiscal 2027, the city's residential exemption page says buyers whose deeds were recorded in that window "may be eligible."
So recording on June 30 instead of July 1 changes which fiscal year your exemption can start in. A spring buyer can apply for the fiscal year already underway. A fall buyer waits for the next one.
The calendar for a fall 2026 closing
Take a buyer who closed in October 2026 and lives in the home. Here is how Boston's published assessing calendar plays out for them:
- Late December 2026. The FY2027 third-quarter bill arrives with the actual FY2027 rate. It reflects the exemption status of the January 1, 2026 owner.
- February 1, 2027. The third-quarter payment is due.
- January 1, 2027. This is the assessment date for FY2028. If the buyer owns and lives in the home as a principal residence that day, they can qualify for FY2028.
- July and October 2027. The FY2028 first- and second-quarter bills are preliminary estimates based on the prior fiscal year's taxes.
- September 2027. Boston mails residential exemption applications to people who bought property in the previous calendar year.
- Late December 2027. The FY2028 third-quarter bill is the first one that can carry this buyer's own exemption, if they apply in time.
That puts about 14 months between closing day and the first bill with the buyer's own exemption on it. The city's fiscal 2027 flyer recommends filing early enough to have the exemption on the third-quarter bill. The deadline is April 1, or three months after third-quarter bills are mailed if that is later. Boston also states that filing for an exemption does not let you postpone paying the bills.
Why a flat dollar amount matters more at lower prices
The exemption removes a fixed amount of assessed value from taxation. The flyer's example: if the exempt value were $100,000, a home assessed at $300,000 would be taxed on $200,000.
For fiscal 2026, Boston says qualified owners saved $4,353.74. The FY2026 residential rate was $12.40 per $1,000 of assessed value. Working backward, that savings equals roughly $351,000 of exempt value. Applying those FY2026 numbers to two hypothetical assessments:
| FY2026 illustration | Assessed at $600,000 | Assessed at $1,200,000 |
|---|---|---|
| Tax with no exemption | $7,440 | $14,880 |
| Exemption savings | $4,353.74 | $4,353.74 |
| Tax with exemption | about $3,086 | about $10,526 |
| Share of the bill removed | about 59% | about 29% |
The savings are the same in dollars at both values. On the lower-priced unit, they remove well over half the bill. So the condo buyers most likely to stretch for a first purchase are also the buyers for whom the January 1 owner's status changes year-one costs the most. A first-time buyer comparing a unit sold by an owner-occupant with one sold by an investor is comparing two different carrying costs, even though the listings show the same price.
These figures use FY2026 numbers. The FY2027 rate and exemption value will arrive with the late-December bill, and the math will shift with them.
Why the bill is a bigger question this year
Boston's residential bills rose sharply last cycle. In January 2026, WBUR reported that the Massachusetts Senate rejected Mayor Michelle Wu's proposal to shift more of the city's tax burden onto commercial property by a 33 to 5 vote. During that debate, the proposal's sponsor pointed to a 13% increase in Boston residents' bills. According to WBUR, the Senate instead passed a measure letting cities and towns offer tax credits in years when property taxes rise more than 10%, aimed mainly at households with a child under 17, residents 65 and older, and residents of federally designated high-need areas.
The same report says much of the pressure comes from downtown commercial property values falling since the pandemic, which leaves commercial landlords paying less. When more of the tax burden lands on residential property, the gap between a bill with the exemption and a bill without it grows too. That makes the January 1 owner's status matter more to a buyer's first year than it did a few years ago.
How this shows up at closing
DLS says assessors do not divide the tax between buyer and seller. That happens in the transaction, where, in DLS's words, "lawyers in a real estate transaction will adjust the purchase price to reflect tax benefits received and tax burdens being assumed." DLS also describes a case where no adjustment was made. The prior owner was not owed a refund, and the buyer kept paying the bills issued after closing.
For a buyer, this is a planning question as much as a tax question. Fall closings fall between preliminary bills, which are based on last year's taxes, and the actual bill that arrives in December. The useful questions to ask, ideally before signing a purchase and sale agreement, are these. Was the seller living in the unit as a principal residence on January 1, 2026? How is your closing attorney handling the tax adjustment? What will your escrow or budget look like if the December bill is higher than the preliminary ones?
This post is general information about how Boston and Massachusetts apply the residential exemption. It is not legal, tax or financial advice, so please confirm your own situation with your closing attorney, a tax professional, or Boston's Taxpayer Referral and Assistance Center at 617-635-4287.
Quick answers
I closed in August 2026. Can I apply for FY2027?
Boston's fiscal 2027 routes cover owners who owned and lived in the home on January 1, 2026, and buyers whose deeds were recorded January 1 through June 30, 2026. An August deed falls outside both. Eligibility for FY2028 depends on owning the home and living in it as your principal residence on January 1, 2027.
Can I claim the exemption on two Boston properties?
No. Boston says an individual can qualify for the residential exemption on only one property.
Where do I get the application?
Boston says applications can be downloaded after third-quarter bills go out in December, through the city's Property Lookup tool under "Abatements/Exemptions." You can also request one from the Taxpayer Referral and Assistance Center.
Does the exemption stack with other exemptions?
Boston allows other personal exemptions alongside the residential exemption. Taxable value generally cannot fall below 10% of assessed value, with exceptions for certain residents facing physical or financial hardship.
If you are comparing two Boston condos this winter, the January 1 owner's status is one of the first things we check, alongside the condo documents and the most recent tax bill. M|E Collective can help you work out what your first year of ownership will cost before you make an offer. Book an Appointment and we will go through the numbers with you.
