Waltham’s property tax rate for fiscal year 2026 is $10.32 per $1,000 of assessed value for residential property and $22.18 per $1,000 for commercial, industrial, and personal property.1City of Waltham. Assessor What you actually owe depends on your assessed value and whether you qualify for the residential exemption, which can cut a homeowner’s bill by several thousand dollars.
What You’ll Pay at the Current Rate
To turn the rate into dollars, take your assessed value, divide by 1,000, and multiply by the rate for your property class.
- A home assessed at $600,000: 600 × $10.32 = $6,192 before any exemption.
- A commercial property assessed at $1,000,000: 1,000 × $22.18 = $22,180.
The residential rate rose about 5% from the prior year, though rising home values across the city offset part of that increase for many owners. The commercial rate running more than double the residential rate is common in Massachusetts communities that adopt a split classification.1City of Waltham. Assessor
The Board of Assessors sets each property’s value based on what it would sell for on the open market, and Massachusetts requires every municipality to certify property values with the Department of Revenue at least every three years, with annual adjustments in between.1City of Waltham. Assessor A major renovation that requires a building permit can also trigger a reassessment between certification cycles.
The Residential Exemption Can Cut Your Bill by Thousands
The biggest tax break for Waltham homeowners is the residential exemption, available to owners who live in the property full-time. For fiscal year 2026, the exemption reduces your home’s taxable assessed value by $317,643. On a home assessed at $600,000, you’re taxed on $282,357 instead of the full amount, saving roughly $3,278 for the year.2City of Waltham, Massachusetts. What Is The Residential Exemption
To qualify for the FY2026 exemption, you must have owned and occupied the property as your principal residence as of January 1, 2025. The exemption is not automatic. If you recently bought your home or changed your primary address, confirm your status with the Board of Assessors. Because the reduction is a fixed dollar amount, it represents a larger percentage saving on lower-valued homes than on higher-valued ones.2City of Waltham, Massachusetts. What Is The Residential Exemption
State law caps the exemption any city can adopt at 35% of the average residential assessed value.3Division of Local Services. Residential Exemption Calculator Investment properties, second homes, and apartment buildings do not qualify.
Other Relief That Can Lower the Bill
Veterans
Massachusetts offers property tax exemptions to veterans with service-connected disabilities, Purple Heart recipients, former prisoners of war, and certain surviving spouses and parents. Amounts start at $400 for a veteran with at least a 10% disability rating and go up to a full exemption for paraplegic veterans or those with 100% service-connected blindness. Veterans must be Massachusetts residents and occupy the property as their home on July 1 of the application year. Some municipalities have adopted the HERO Act, which can double these amounts or adjust them for inflation, so check with Waltham’s assessors for current local figures.4Mass.gov. Local Property Tax Exemptions for Veterans
Senior Tax Work-Off Program
Residents age 60 and older can earn a property tax credit by volunteering in city departments. Participants earn $16.25 per hour, up to a maximum credit of $750 per household per fiscal year. You must own and occupy the property, and income guidelines apply.5City of Waltham. Senior Work-off Program
Senior Citizen Exemption
Massachusetts also authorizes a separate property tax exemption for seniors (Clause 41C) that municipalities can adopt with locally determined income and asset limits. Eligibility and amounts vary. Contact the Waltham Board of Assessors to find out whether you qualify and what the current exemption amount is.
When Your Tax Bill Is Due
Waltham bills property taxes quarterly, with due dates on August 1, November 1, February 1, and May 1. If a due date falls on a weekend, payment is due the next business day. The city counts your payment as received when the Treasurer’s office actually gets it, not the postmark date, so leave time for mail.6City of Waltham. Treasurer Collector Department – Real Estate
You can pay online with Visa, MasterCard, Discover, or electronic check. Credit and debit card payments carry a 2.95% convenience fee, which adds up fast on a large bill. E-check avoids that fee. Mailing a check with the remittance slip or paying in person at the Treasurer’s counter in City Hall both work too.7City of Waltham. Pay and View Bills
If you don’t receive a bill at least 30 days before the due date, call the Treasurer’s office for a copy. Not receiving a bill does not excuse a late payment.6City of Waltham. Treasurer Collector Department – Real Estate
Late Payment Interest
Missing a deadline is expensive. Massachusetts law sets the interest rate on overdue property taxes at 14% per year, calculated from the due date. The rate is not negotiable and applies automatically.8General Court of Massachusetts. Massachusetts General Laws Part I, Title IX, Chapter 59, Section 57
If You Think the Assessment Is Too High
If you believe the city overvalued your property, you can file for an abatement. This asks the Board of Assessors to reduce your assessed value and lower your bill. You’ll need evidence that the assessed value exceeds fair market value, such as a recent appraisal, comparable sale prices in your neighborhood, or documentation of property conditions the assessor may not have accounted for.
The deadline is tight. Because Waltham bills quarterly, your abatement application must be filed on or before the due date of the first installment of the actual tax bill (the third-quarter bill, due February 1). For FY2026 that deadline fell on February 2 because February 1 was a Sunday. Use State Form 128, available from the Board of Assessors or the Massachusetts Department of Revenue.9General Court of Massachusetts. Massachusetts General Laws Part I, Title IX, Chapter 59, Section 59
One requirement catches many people off guard: you must pay your full tax bill on time for every installment of the year you’re appealing, even while the appeal is pending. Missing a payment can forfeit your appeal rights entirely. If the assessors deny your application, you can escalate to the Massachusetts Appellate Tax Board. You’ll also need to file a fresh abatement application each year you want to contest your assessment, even if a prior year’s case is still unresolved.
Why the Rate Changes Each Year
Two forces shape the rate. First, Proposition 2½ caps how much the city can collect: total levy cannot exceed 2.5% of the city’s total assessed value, and the levy cannot grow more than 2.5% over the prior year’s limit plus revenue from new construction. The only way past these limits is a voter-approved override.10General Court of Massachusetts. Massachusetts General Laws Part I, Title IX, Chapter 59, Section 21C
Second, within that cap, the city council (with the mayor’s approval) votes each year on a residential factor that decides what share of the burden falls on homeowners versus commercial property owners. The Board of Assessors presents data at a public hearing before the vote, and the state Department of Revenue will not certify the final rate until the process is complete.11General Court of Massachusetts. Massachusetts General Laws Part I, Title VII, Chapter 40, Section 56 That’s why the residential and commercial rates can move in opposite directions from year to year: the city is deciding how to divide a capped pool of revenue, not simply raising or lowering taxes across the board.