Dedham, MA Property Tax: Rates, Exemptions, and Due Dates

The Dedham MA property tax rate for fiscal year 2026 is $12.30 per $1,000 of assessed value on residential property, and $25.51 per $1,000 on commercial, industrial, and personal property.¹ On the average single-family home, assessed at about $810,871, that produces an annual bill of roughly $9,974, paid in four quarterly installments.

FY2026 Rates at a Glance

Dedham uses a split tax rate, so homeowners pay less per $1,000 than businesses do:

Residential: $12.30 per $1,000 of assessed value
Commercial, industrial, and personal property: $25.51 per $1,000 of assessed value

The residential rate has moved modestly in recent years, sitting at $12.50 in FY2024 before settling at $12.30 for FY2026.¹ Rates are set annually by the Board of Assessors and the Select Board, with final approval from the Massachusetts Department of Revenue.

How to Calculate Your Bill

Divide the assessed value by 1,000, then multiply by the rate. A home assessed at $600,000 under the FY2026 residential rate owes $7,380 for the year. A home at the town average of $810,871 owes $9,973.71.¹

Assessed value is meant to reflect the property’s full and fair market value as of January 1 each year. Local assessors arrive at that figure using recent comparable sales, building permits, and the physical characteristics of each parcel. Dedham’s fiscal year runs July 1 through June 30, so the January 1, 2025 assessment drives the FY2026 bill. You can look up your own property record on the town’s online assessors database to see the figures the town is working from.²

When Payments Are Due

Dedham bills property taxes quarterly. Payments are due August 1, November 1, February 1, and May 1. If a due date lands on a weekend or holiday, it shifts to the next business day.³

You can pay online through the town’s InvoiceCloud portal, mail a check to the Collector’s Office, or pay in person at Town Hall.⁴ Include a self-addressed stamped envelope if you want a mailed receipt. If your mortgage lender escrows taxes, the town still sends the bill to you; the legal obligation to pay on time stays with the owner, so verify each quarter that the lender actually disbursed the payment.

Ways to Reduce What You Owe

Exemptions

Massachusetts General Laws Chapter 59, Section 5 provides property tax exemptions for specific groups, and qualifying Dedham residents apply through the Assessor’s Office. Common categories include seniors age 70 and older, surviving spouses, legally blind residents, and disabled veterans with service-connected disabilities. Each category has its own exemption amount and documentation requirements, such as military discharge papers or medical certifications. Applications are generally due within three months after the third-quarter tax bill is mailed.

Abatements

If you think your assessed value is higher than what the property would actually sell for, you can file an abatement application asking the Assessor’s Office to review the valuation. The deadline is February 1 following the issuance of the third-quarter tax bill, and missing it means waiting a full year to challenge the assessment.⁵

Evidence matters. Recent sales of comparable properties in your neighborhood are the strongest support, and a professional appraisal can help when the overassessment is substantial enough to justify the cost. Before filing, pull your property record card from the online database and look for factual errors: wrong square footage, a finished basement that isn’t finished, an extra bathroom that doesn’t exist.²

Senior Tax Work-Off Program

Eligible homeowners age 60 and older can work up to 150 hours for the town during the program year (December 1 through November 1) and earn a maximum credit of $1,500 against the following fiscal year’s real estate tax bill.⁶ To qualify you must:

Be 60 or older
Own and occupy property in Dedham and pay real estate tax on it
Have annual income below $30,000 (single) or $40,000 (married)
Be current on property tax payments
Complete a CORI background check and interview with the Council on Aging Director

The earnings are reportable income, and participants receive a W-2. Income verification is required each year, so plan to reapply.⁶

A Note on Supplemental Bills After Construction

If you complete a major renovation or addition, expect an extra bill. Under Massachusetts General Laws Chapter 59, Section 2D, when new construction raises a property’s building value by more than 50% and an occupancy permit is issued after January 1, the town issues a supplemental assessment covering the added value from the occupancy permit date through the end of the fiscal year. Supplemental bills are due 30 days from the date of issuance, not on the normal quarterly schedule, and unpaid amounts accrue interest at the standard delinquent rate.

If You Fall Behind

Interest starts accruing the day after a missed deadline, with no grace period. If a balance stays unpaid after the town sends a formal demand, the next step is a tax lien. Under Chapter 60 of the Massachusetts General Laws, the town can record an instrument of taking at the Registry of Deeds if the amount is not paid within 14 days of the demand letter. The lien attaches to the property itself and follows the title in any future sale or transfer.⁷

Six to twelve months after the taking, the town can file a foreclosure case in Land Court. Owners keep the right to redeem the property by paying all back taxes, interest, and costs at any point before the court issues a foreclosure judgment. Once that judgment comes down, the owner loses the property. If the property is worth more than the tax debt, the former owner may be entitled to claim the excess equity after foreclosure, but the process is adversarial and the timeline is tight.⁷

If you are struggling to pay, call the Collector’s Office before the lien stage. Payment arrangements are far easier to negotiate than unwinding a tax taking.

1
Town of Dedham. Historical Rates
2
Vision Government Solutions. Town of Dedham Online Assessors Database
3
Town of Dedham. Tax Schedule and Fees
4
Town of Dedham. Pay a Bill or Fee Online
5
Town of Dedham. Frequently Asked Questions
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Town of Dedham. Property Tax Work-Off Program Available for Dedham Homeowners
7
Mass.gov. Frequently Asked Questions About Tax Lien Foreclosure Cases in the Land Court