# How Do Somerville Property Taxes Work, and Why Can the February Bill Surprise You?
Key Takeaways
•The short answer: Somerville sends four property tax bills a year. The August and November bills are estimates based on last year's tax. The February bill is the first actual bill, and it carries the whole year's increase.
•The squeeze: Any yearly increase is split across only two payments, February and May, instead of four.
•The high school charge: City projections show the charge peaking in 2027, so it is at or near its highest level now.
•The bottom line: Set aside extra cash after your November payment, and if your value seems wrong, file for an abatement (a formal challenge to your assessment) by February 1, per the City.
Why Doesn't Paying on November 1 Settle Your Year?
In Somerville, your November payment does not finish the year.
Per the City of Somerville Treasurer/Collector, property taxes are billed on August 1, November 1, February 1, and May 1. The first two bills are estimates based on last year's tax. FY2027 started July 1, 2026, so your November bill is still an estimate. The City's Assessing calendar shows actual FY2027 bills mailing December 31, 2026.
What Goes Into the February Tax Bill?
Your assessment is the city's estimate of your home's value. The Property Tax Desk, a consumer tax guide, notes that Massachusetts taxes homes at full market value. For FY2027, the valuation date is January 1, 2026, so your assessment may not match today's sale price.
Proposition 2 1/2 limits the levy (the total tax the city collects), according to AppealDesk, a property tax appeal service. It does not cap your individual assessment.
Then there is the high school debt exclusion, a voter-approved charge that lets the city collect extra tax to repay a loan. Payments run from 2018 to 2054 and peak in 2027.
City Borrowing and Debt Exclusion Timeline
Highlights the borrowing amount, debt exclusion amount, and repayment timeline for Somerville’s High School financing plan.
Borrowing
Amount the City intends to borrow$130.3 million
Debt Exclusion
Amount of City share to be exempted from Proposition 2 1/2 limits (if approved)$130.3 million
City’s total share referenced$136 million
Timeline
Payment period (debt service)2018 to 2054
Years until peak amount reached11 years
Peak year for property tax increase2027
An abatement can correct an over-assessment, but it will not erase the high school charge itself.
How Big Could the February Catch-Up Be?
According to the City's FY2026 Property Tax Update, the average increase last year was $992 for three-families and just $58 for condos. If FY2027 looks like FY2026, a $992 increase would mean about $496 extra on each of the February and May bills, not $248.
City projections put the high school charge at its 2027 peak: $189 per year for condos and $294 for single-families. Most of that is already in your bill; only this year's rise shows up in the catch-up.
Projected High School Debt Exclusion Tax Impact by Property Type
Compares projected annual property-tax increases from the Somerville High School debt exclusion across condos, single-family, two-family, and three-family properties from early years to peak impact.
Year 1
Year 2
Year 5
Peak
| Series | Label | Value |
|---|---|---|
| Year 1 | Condo | $2 in year 1 |
| Year 2 | Condo | $7 in year 2 |
| Year 5 | Condo | $51 in year 5 |
| Peak | Condo | $189 per year |
| Year 1 | Single-Family | $4 in year 1 |
| Year 2 | Single-Family | $11 in year 2 |
| Year 5 | Single-Family | $79 in year 5 |
| Peak | Single-Family | $294 per year |
| Year 1 | Two-Family | $4 in year 1 |
| Year 2 | Two-Family | $12 in year 2 |
| Year 5 | Two-Family | $94 in year 5 |
| Peak | Two-Family | $349 per year |
| Year 1 | Three-Family | $5 in year 1 |
| Year 2 | Three-Family | $15 in year 2 |
| Year 5 | Three-Family | $116 in year 5 |
| Peak | Three-Family | $428 per year |
Multi-family owners should budget most aggressively. If you bought recently, your bill may still reflect the seller's exemptions (or lack of them), so check it. The Residential Exemption benefits owner-occupants, but only if you file.
What Are the Strongest Arguments Against Worrying?
"The rate barely moved." The residential rate went from $10.91 to a proposed $10.98, per the City's FY2026 Property Tax Update. Yet the City reports three-families still saw an average increase of $992, because values and the total levy rose.
"My escrow pays it." With escrow, your lender collects tax money with your monthly mortgage payment and pays the bill. That changes who sends the check, not the amount. Ask your loan servicer how a February jump could affect your monthly payment.
"I'll deduct it at tax time." That may help some itemizers, but a tax benefit months later does not pay a February bill. Ask your tax preparer.
What Should You Do Before February 1?
•Now: Pay the November estimate, then set aside extra cash based on your property type.
•Late December: Read the assessment notice. Compare your value to sales near January 1, 2026.
•By your first actual bill's due date (February 1, per the City): File an abatement request if your value seems wrong. AppealDesk notes the filing uses State Tax Form 128 and the deadline cannot be extended.
•While you wait: Keep paying. Late payments may bring interest charges, so confirm current rules with the Treasurer/Collector. If your abatement is denied, the Property Tax Desk says you have 90 days to appeal.
•After your actual bill arrives: File for the Residential Exemption and the CPA exemption (a break on the Community Preservation Act surcharge) if eligible. Check the deadline on your bill or with the Assessing office. Your lender will not file for you.
Compare your November estimate with your actual bill when it arrives around December 31.
