Is your property tax bill too high?

Your tax bill starts with your assessment. Run a free check to see whether your Massachusetts home may be over-assessed. If the numbers suggest a real issue, you can continue to guided abatement paperwork.

Free check. No account. No payment required.

Miss your town’s deadline and you overpay for another full year. Most of Massachusetts gives you one short window to challenge your assessment — often only weeks after your first actual tax bill, with no extensions.

Free to check. Flat fee if you continue.

Free Check
$0

No account. No payment. See whether your assessment may be high.

Run Free Check
Guided Abatement Packet
$79 one time

Available if the free check suggests a possible basis and you decide to continue.

Continue after free check

Overassessed MA provides automated information and guided form-preparation support. It does not guarantee an abatement and does not file anything on your behalf.

What the free check tells you

Whether your assessment appears high

We compare your assessed value against relevant property and market data for your area.

What it may be costing you

If the assessment appears high, we estimate the possible annual impact on your tax bill.

Whether it may be worth continuing

If there appears to be a basis, you can decide whether to prepare the abatement packet.

From tax worry to a filing-ready packet

1

Free Check

See whether your assessment may be too high and what that could mean for your tax bill.

2

Guided Abatement Packet

If it appears worth pursuing, prepare the paperwork and supporting information for your town.

Continue only if the free check suggests a possible issue.

How the assessment & abatement process works

A quick, plain-English overview. Overassessed MA is informational only — not legal or tax advice.

1

Your assessment sets your tax bill

Each year your city or town assesses your home at its estimated fair cash value as of January 1. Your tax bill is that assessed value multiplied by the local tax rate — so if the assessment is too high, your tax bill is too.

2

An abatement is how you challenge it

If you believe your assessment is too high, you can apply for an abatement — a request asking your local Board of Assessors to lower it. In Massachusetts this is filed on State Tax Form 128.

3

The deadline is short and firm

An abatement application is generally due on or before the date your first actual (non-preliminary) tax bill for the year is due, often early in the calendar year. This deadline cannot be extended, so confirm your town’s exact date.

4

Review, decision, and appeal

The assessors review your application and may grant it, deny it, or take no action. If you disagree with the outcome, you can generally appeal to the Massachusetts Appellate Tax Board within three months.

Overassessed MA helps you check your assessment and prepare the paperwork — you review, sign, and file with your town. Verify all deadlines and requirements with your city or town.

If it looks worth challenging, the guided packet helps you prepare

The guided workflow helps you organize the information commonly needed for a Massachusetts abatement application, without making you start from a blank form.

  • Plain-English assessment summary
  • Comparable-property support
  • Estimated tax impact
  • Guided Form 128 preparation
  • Filing checklist
  • Town-specific filing reminders where available
  • Copy you can review before signing and submitting
Start With the Free Check

Built for Massachusetts homeowners

Massachusetts-specific process

Designed around the Massachusetts abatement process and State Tax Form 128.

Uses public assessment data

Starts with public property records and assessment information.

You stay in control

You decide whether to continue, whether to sign, and whether to file.

Clear limits

Informational support only. Not a law firm, appraisal service, tax advisor, or government agency.

Frequently asked questions

Is the check really free?

Yes. The initial check is free and does not require payment.

Why does my assessment matter if I’m worried about my tax bill?

Your tax bill is calculated from your assessed value and your local tax rate. If your assessment is too high, your tax bill may be too high. The abatement process is the way to ask your city or town to reduce the assessment.

What is a property tax abatement?

A property tax abatement is a request to reduce an assessed value or tax amount. In Massachusetts, homeowners generally submit the application to their local board of assessors.

What is Form 128?

Form 128 is the Massachusetts abatement application form commonly used to seek a property tax abatement.

Do you file the application for me?

No. Overassessed MA helps you prepare information and paperwork. You are responsible for reviewing, signing, and filing with your city or town.

Is this legal, tax, or appraisal advice?

No. Overassessed MA provides automated information and guided form-preparation support. It is not legal, tax, or appraisal advice.

What if my town has a different deadline?

Deadlines can vary depending on the town and tax bill cycle. You should confirm the deadline with your local assessor’s office.

Do you guarantee I will save money?

No. The tool can help identify a possible issue and prepare paperwork, but the city or town decides whether to grant an abatement.

Overassessed MA provides automated information and guided form-preparation support. It does not guarantee an abatement and does not file anything on your behalf.