Massachusetts charges a flat 5% income tax on wages, investment income, and most other earnings

Massachusetts has one of the simplest state income tax systems in the country. The state taxes most income at a single rate of 5%, which has been in place since 2002. This means whether you earn $30,000 or $300,000 a year, the tax rate on your income stays the same — there are no tax brackets that increase as you earn more.

The 5% rate applies to wages, salaries, tips, interest, dividends, capital gains, and business income. Some types of income are taxed differently or not at all, which we'll cover below. If you live in Massachusetts or work there, you'll owe state income tax on your earnings.

Key Takeaways

  • Massachusetts taxes most income at a flat 5% rate, with no higher brackets for higher earners.
  • Long-term capital gains and certain types of retirement income are taxed at 5%, while short-term capital gains follow the regular income rate.
  • You must file a state return if you earned income in Massachusetts, even if you don't owe federal tax.
  • The state offers a property tax credit and a dependent exemption that can reduce your tax bill.
  • Withholding from your paycheck is calculated using a Massachusetts W-4 form, separate from the federal version.

What income gets taxed at the 5% rate

The 5% rate covers most of what you earn. This includes your regular wages and salary, bonuses, overtime, tips, and self-employment income. It also covers interest from savings accounts and bonds, dividends from stocks, and rental income from property you own.

Short-term capital gains — profits from selling stocks, real estate, or other assets you've held for one year or less — are taxed as regular income at 5%. Long-term capital gains, which are profits from assets held longer than one year, are also taxed at 5% in Massachusetts, unlike the federal system where they often receive preferential rates.

Income that is not taxed or is taxed differently

Some income is completely exempt from Massachusetts tax. Social Security benefits are not taxed. Certain types of retirement income also escape taxation: distributions from traditional IRAs and 401(k) plans are not subject to state income tax if you are 59½ or older, though they are still subject to federal tax. Pension income from a Massachusetts public employee retirement system is also exempt.

Gifts and inheritances are not taxed as income. Neither are life insurance proceeds paid to a beneficiary. Municipal bond interest is exempt from both state and federal tax. If you have questions about whether a specific type of income is taxable, the Massachusetts Department of Revenue publishes guidance on their website.

How withholding works and what forms you need

Your employer withholds Massachusetts state income tax from your paycheck using a separate form from the federal W-4. When you start a job in Massachusetts, you'll fill out a Massachusetts W-4 (Form MW-4) to tell your employer how much to withhold. The amount depends on your filing status, the number of dependents you claim, and any other income you have.

If you don't fill out a Massachusetts W-4, your employer will withhold at the highest rate, which means you'll likely overpay and get a refund when you file. If you have multiple jobs, side income, or a spouse who also works, you may need to adjust your withholding to avoid underpaying. You can update your W-4 at any time during the year.

Filing requirements and important date

You must file a Massachusetts state income tax return if you lived in the state for any part of the year and had income. The important date is the same as the federal important date — typically April 15, though it shifts if that date falls on a weekend or holiday. If you file your federal return late, your state return is also late, and penalties explore.

You file using Form 1, the Massachusetts Individual Income Tax Return. If you have a straightforward tax situation — just wages and standard deductions — you can file online using free software. The Massachusetts Department of Revenue maintains a list of approved free filing options. If you owe money, you can pay online, by mail, or through your bank.

Credits and deductions that lower your tax bill

Massachusetts offers a property tax credit for homeowners and renters with lower incomes. The credit reduces your tax bill based on how much property tax or rent you paid during the year. You must have a household income below a certain threshold, which changes yearly. The 2024 threshold is $63,000 for most filers.

You also get a dependent exemption for each child or dependent you claim. This reduces your taxable income by a set amount per dependent. Unlike the federal system, Massachusetts does not allow a standard deduction — instead, you claim either the dependent exemption or itemize deductions if you have enough to exceed the exemption amount.

If you paid estimated taxes during the year — for example, because you're self-employed — you can claim a credit for those payments when you file. You can also claim a credit for taxes paid to other states if you worked in multiple states during the year.

How to file and where to send your return

Most people file online through the Massachusetts Department of Revenue website or through approved tax software. Filing electronically is faster and more find than mailing a paper return. If you file electronically and are owed a refund, you'll receive it within two to three weeks if you choose direct deposit, or longer if you request a check.

If you prefer to mail a paper return, send it to the Massachusetts Department of Revenue at the address listed on Form 1. Keep a copy for your records. If you need help understanding your return or have questions about what to report, the Department of Revenue has a phone line and website with guidance documents.

Frequently Asked Questions

Do I have to file a Massachusetts return if I don't owe any tax?

Yes, if you lived in Massachusetts for any part of the year and had income, you must file even if you don't owe tax. Filing may result in a refund of withholdings or allow you to claim credits like the property tax credit.

What happens if I move out of Massachusetts during the year?

You owe Massachusetts tax only on income earned while you lived there. When you file, you'll report your income for the part of the year you were a resident and your income for the part of the year you were not. You may also owe tax to the state you moved to.

Can I deduct student loan interest on my Massachusetts return?

No. Massachusetts does not allow a deduction for student loan interest. You may be able to deduct it on your federal return, but the state does not offer this deduction.

What if I didn't have enough withheld and owe money when I file?

You can pay the balance due when you file, either online or by mail. If you owe a large amount, you can set up a payment plan with the Department of Revenue. You may also want to adjust your withholding for the next year so you don't underpay again.

Is there a penalty for filing late?

Yes. If you file after the important date and owe tax, you'll owe a failure-to-file penalty of 5% per month (up to 25%) plus interest on the unpaid tax. If you're owed a refund, there is no penalty for filing late, but you won't receive your refund until you file.