Massachusetts Form ABT, the Application for Abatement, is how you ask your local board of assessors to reduce a property tax you believe is too high. Get the form from your municipal assessor’s office or download it from the Department of Revenue website, complete it with your parcel information and a specific legal ground for the reduction, attach evidence that supports your claim, and file it with the assessors by the due date of the first installment on your actual tax bill.1Mass.gov. Form ABT Application for Abatement Filing does not pause your obligation to pay, so keep every installment current while the application is under review.
When Form ABT Must Arrive
The application must reach the assessors by the due date of the first installment on the actual tax bill, not the preliminary bill. For most municipalities that bill quarterly, that means February 1, when the third-quarter payment is due. Communities on semi-annual billing usually set the deadline at November 1, or 30 days after the actual bills are mailed, whichever comes later.2Secretary of the Commonwealth. Property Tax Abatement Tips
These deadlines are absolute. Assessors have no power to extend or waive them, and a late application must be denied no matter how strong the underlying case.3City of Quincy. Massachusetts State Form: Real Estate Abatement Application Confirm your municipality’s billing cycle with the assessor’s office early in the fiscal year and mark the date.
Choosing the Right Ground
Form ABT requires you to select the specific legal ground for your abatement. Under Chapter 59, Section 59 of the General Laws, assessors must grant a reasonable abatement when a taxpayer is taxed at more than a just proportion, is placed in an improper classification, or is assessed above fair cash value.4General Court of Massachusetts. Massachusetts Code Chapter 59 – Section 59 The three grounds you can claim on the form are:
- Overvaluation. The assessed value exceeds the property’s fair market value as of January 1 of the tax year. This is the most common ground.
- Disproportionate assessment. Your property is assessed at a higher percentage of fair value than comparable properties in the same municipality. You show you’re carrying a larger share of the burden than similar owners.
- Misclassification. The property sits in the wrong tax category, such as a residential property being taxed at the commercial rate.
Pick the ground that matches your actual evidence. If you claim overvaluation, your evidence must speak to market value; if you claim misclassification, it must speak to how the property is used.
A separate track exists for personal exemptions available to seniors, surviving spouses, minor children of a deceased parent, blind individuals, and veterans with service-connected disabilities. Exemptions use different forms and deadlines and are not filed on Form ABT.5Massachusetts Department of Revenue. Assessment Administration: Law, Procedures and Valuation – Property Tax Exemptions Ask your assessor’s office if you think one applies.
Completing the Form
Have your most recent actual tax bill in front of you when you sit down with Form ABT. You’ll need the parcel identification number and the bill number from that document.1Mass.gov. Form ABT Application for Abatement
The form asks you to:
- Identify your legal interest in the property (owner, tenant obligated to pay taxes, or mortgagee).
- Enter the current assessed value shown on your bill.
- State the dollar amount of the reduction you’re requesting.
- Check the box for the ground you’re claiming.
- Provide a written explanation supporting your claim.
The written explanation is where applications succeed or fail. Vague statements that the tax feels too high get nowhere. State what the assessment says, why you believe it is wrong, and what evidence you are attaching. Tie every sentence back to the ground you checked.
Evidence That Actually Works
Massachusetts law presumes the assessment is valid. You carry the burden of proving it wrong, and if your evidence is thin, the assessors and later the Appellate Tax Board will uphold the original number even if no defense is offered on the other side. There is one narrow exception: if the Appellate Tax Board set your property’s fair cash value in a prior fiscal year and the current assessment is for one of the next two fiscal years, the assessors must justify any increase.6Mass.gov. Real Estate Tax Appeals: A Helpful Guide for Taxpayers and Assessors
For an overvaluation claim, the workhorse evidence is comparable sales. Pull at least three recent sales of properties similar to yours in style, size, lot area, number of bedrooms, and neighborhood. Your local assessor’s office maintains sales records you can review at no cost.7Town of Lincoln. Frequently Asked Questions
Other documents worth attaching:
- An independent appraisal reflecting the property’s value as of January 1 of the tax year.
- Photographs showing damage, deferred maintenance, outdated interiors, or environmental problems that reduce value.
- Deeds or surveys, useful when the assessor has the lot size or boundaries wrong.
- Utility bills or occupancy permits when arguing misclassification, to show how the building is actually used.
Package everything so it reads as a single argument for the ground you claimed. An organized submission gets a more careful read than a stack of loose papers.
Submitting the Application
Deliver the completed Form ABT and your evidence to the local board of assessors. Hand-delivery to town or city hall works; certified mail with return receipt requested also works. Either way, walk away with proof of the filing date, whether that is a date-stamped copy from the clerk or a postal receipt. If the timing is ever contested, that receipt is the whole case.
Keep paying the tax while the application is pending. Filing Form ABT does not stop collection, and if your total tax bill exceeds $5,000, the payment must physically be in the tax collector’s office by each due date; a postmark will not save you, and missing a payment forfeits your right to appeal to the Appellate Tax Board later.2Secretary of the Commonwealth. Property Tax Abatement Tips Late payments can also trigger additional charges.
What Happens After You File
The assessors will usually contact you to inspect the property. Under Chapter 59, Section 61A, you must exhibit the property on request and provide written information the assessors reasonably need to determine fair cash value, including income and rent data for investment properties. You have 30 days to comply. Ignoring or refusing the request bars any further appeal unless you can show the failure was beyond your control or that you made a good-faith attempt to comply.8General Court of Massachusetts. Massachusetts Code Chapter 59 – Section 61A
The assessors then have three months from the date you filed to act. If they let that window close without a decision, the application is deemed denied by operation of law, and the assessors lose authority to act on it after that.9General Court of Massachusetts. Massachusetts Code Chapter 59 – Section 64 You will get written notice of the outcome: an approval with the reduction amount, or a denial with reasons.
If the Assessors Deny Your Application
A denial, or a deemed denial from the three-month clock running out, opens the door to the Appellate Tax Board (ATB), an independent state tribunal. The ATB runs two procedures:
- Small claims. Available when the tax in dispute is $25,000 or less per fiscal year. The process is informal and designed to be handled without a lawyer.10Mass.gov. Overview of the Appellate Tax Board
- Formal procedure. Used for larger disputes. Assessors can also elect to move a case to formal procedure within 30 days of filing if the property’s fair cash value exceeds $20,000.10Mass.gov. Overview of the Appellate Tax Board
The presumption of validity follows the case to the ATB. If the evidence you built for Form ABT wasn’t enough to prove overvaluation, disproportionate assessment, or misclassification, the board will uphold the assessment.6Mass.gov. Real Estate Tax Appeals: A Helpful Guide for Taxpayers and Assessors When significant money is on the line, a property tax attorney or a licensed appraiser is worth the cost.
If the Abatement Is Granted
The municipality must reimburse you for the abated tax if you have already paid, plus interest at 8 percent running from the date you paid or the original due date, whichever is later. No refund is issued while you still owe an outstanding balance on the tax bill the abatement relates to.11General Court of Massachusetts. Massachusetts Code Chapter 59 – Section 69
If a mortgage escrow account pays your taxes, a successful abatement should lower your monthly escrow payment eventually. Under federal rules, your mortgage servicer runs an annual escrow analysis, and any surplus of $50 or more must be refunded within 30 days.12Consumer Financial Protection Bureau. Regulation 1024.17 – Escrow Accounts You don’t have to wait for the yearly review. Call the servicer after the refund arrives and ask for an early reanalysis so the payment adjusts sooner.
If you itemized deductions on the federal return for the year you paid the tax and deducted the amount later abated, the IRS may treat the refund as taxable income under the tax benefit rule. The portion of the refund that reduced your federal tax liability that year is reported as income on Schedule 1 of Form 1040. If you took the standard deduction that year, the refund isn’t taxable. IRS Publication 525 includes a worksheet for the calculation.13Internal Revenue Service. Publication 525 – Taxable and Nontaxable Income
A Note on Motor Vehicle Excise
Form ABT is for real and personal property taxes. Motor vehicle excise abatements use a different form available from your local assessor and a different deadline: three years from the date the excise is due, or one year from the date you paid it, whichever comes later.14Boston.gov. How to File an Excise Tax Abatement Common grounds include selling or trading the vehicle, moving out of Massachusetts, or the vehicle being totaled or stolen.