# How Somerville's Quarterly Property Tax Bills Work: Assessments, Debt Charges, and What Owners Actually Pay
Key Takeaways
•The short answer: Your August and November bills are estimates built from last year's tax. The February bill is the true-up.
•What actually moves your bill: not the rate vote, but reassessed value and the size of the levy — the total the city collects from all property owners.
•The biggest lever for owner-occupants: the residential exemption cut qualifying FY2026 bills by $4,578.
•The bottom line: Budget a cushion for February, not four equal payments.
Why Was Your August Bill Only an Estimate?
Fiscal year 2027 began July 1, but your August bill arrived before the city set this year's rate.
Somerville's fiscal year runs July 1 to June 30, with bills due in August, November, February, and May, per the Somerville Treasurer/Collector.
The rate comes later. Classification — the vote that splits the tax burden between homes and businesses — is typically taken in late November; confirm this year's date with the City Clerk.
How Do the Four Quarterly Tax Bills Actually Divide the Year?
Bills one and two are preliminary. The city estimates them from last year's actual tax plus 2.5%, per the Somerville Treasurer/Collector, then splits that total into four payments. You can forecast August and November yourself.
The classification vote sets the real numbers: residential rate, commercial rate, and exemption.
Bills three and four are the actual bills. The city calculates your full-year tax, subtracts what you already paid, and splits the rest into two payments. Any growth in your assessed value gets absorbed into two payments instead of four.
Assessments also look backward, reflecting an earlier market date rather than current listings.
What Do Somerville Owners Actually Pay?
Until the FY2027 vote, FY2026 is your planning baseline. The FY2026 residential rate was $10.98 for every $1,000 of your home's assessed value, up seven cents from FY2025's $10.91; the commercial rate moved from $18.92 to $18.94.
Somerville Residential and Commercial Tax Rates: FY2025 to FY2026
Two-year trend in Somerville’s residential and commercial tax rates per $1,000 of assessed value.
Residential tax rate
Commercial tax rate
| Series | Label | Value |
|---|---|---|
| Residential tax rate | FY2025 | $10.91 |
| Residential tax rate | FY2026 | $10.98 |
| Commercial tax rate | FY2025 | $18.92 |
| Commercial tax rate | FY2026 | $18.94 |
Source:FY2026 Property Tax Update
Property Tax Hawk puts the median Somerville assessment at $946,600; applying the seven-cent increase to that value works out to about $66 more a year. Assessed value moves bills far more.
The larger lever is the residential exemption, a flat credit for owners who live in the home. For FY2026 it cut qualifying bills by $4,578, up from $4,328 in FY2025.
Somerville Residential Exemption Tax Savings: FY2025 to FY2026
Two-year change in the residential exemption tax savings available to qualifying Somerville owner-occupants.
| Series | Label | Value |
|---|---|---|
| Residential exemption tax savings | FY2025 | $4,328 |
| Residential exemption tax savings | FY2026 | $4,578 |
Source:FY2026 Property Tax Update
That is why two similar homes on one block can carry very different bills. Eligibility depends on when you bought and whether you live there — ask Assessing which cutoff date governs the bill you are about to receive.
Some bills also carry a separate high school debt charge. If yours does, confirm the current-year amount with Assessing at 617-625-6600 x3100.
What Are the Strongest Arguments Against This?
"The annual total is the same, so the sequence does not matter."
It matters for cash flow. Property Tax Hawk's median assessment of $946,600 at $10.98 per $1,000 is about $10,390 a year. Average residential bills rose 3.7% in FY2026, per The Somerville Times — roughly $380 on that bill, landing in the last two payments, so near $190 extra in each.
"Escrow handles it."
Most servicers recalculate escrow — the account your servicer uses to pay your taxes — after the actual February bill, and a higher-than-estimated bill typically shows up as a shortage and a larger monthly payment. Filing an abatement, a formal request to lower your assessed value, is the owner's to make, not the servicer's; confirm that with yours. Check the filing cutoff printed on the bill the day it arrives.
"Seven cents is a rounding error."
On the rate, largely yes — about $66 on a median bill. The driver sits elsewhere: The Somerville Times reported average residential values rose 3.8% for FY2026 and the resulting bills rose 3.7%, while the levy grew from $245 million to $265 million. Reassessment, not the rate vote, is what moves your February payment.
What Should You Do Before the Classification Vote?
•Set aside a February cushion. Two payments, not four, carry the year's increase.
•Calendar the dates: November preliminary bill, the classification vote, February actual bill.
•Confirm your residential exemption. Ask Assessing whether your purchase and occupancy dates qualify; if not, apply for next year.
•Check your parcel at gis.vgsi.com/somervillema, comparing your assessed value against sales near the assessment's backward-looking market date, not today's listings.
Somerville's system tilts toward owner-occupants. The city shifts more of the burden onto commercial property, and the exemption cut qualifying FY2026 bills by $4,578. Pull your assessment and run the numbers before the Council votes.
