Massachusetts taxes some Social Security income, but not all of it

Massachusetts is one of the few states that taxes Social Security benefits. However, the state does not tax all of your Social Security income—it depends on your total income and filing status. If your combined income (adjusted gross income plus nontaxable interest plus half your Social Security benefits) falls below a certain threshold, you owe no state tax on your benefits. If it exceeds that threshold, Massachusetts taxes the amount above the threshold at the state income tax rate of 5.05 percent.

The threshold amounts are set each year and vary by filing status. For the 2024 tax year, the threshold is $17,200 for single filers and $21,500 for married couples filing jointly. These thresholds are adjusted annually for inflation. If your combined income is below these amounts, you file your Massachusetts return but report zero taxable Social Security income.

Key Takeaways

  • Massachusetts taxes Social Security benefits only if your combined income exceeds $17,200 (single) or $21,500 (married filing jointly) for 2024, with thresholds adjusted yearly.
  • Combined income includes your adjusted gross income, nontaxable interest, and half of your Social Security benefits—not just your benefits alone.
  • The state income tax rate on taxable Social Security is 5.05 percent, the same rate applied to other income.
  • You must file a Massachusetts return even if no state tax is owed, so the state can verify your income against the threshold.
  • Federal tax on Social Security follows different rules and thresholds than Massachusetts state tax.

How Massachusetts calculates combined income

The calculation is not straightforward because "combined income" includes three separate pieces. Start with your adjusted gross income (AGI)—the number from your federal Form 1040 after deductions like educator expenses or student loan interest. Then add any nontaxable interest you received, such as interest from municipal bonds. Finally, add half of your Social Security benefits for the year, regardless of whether those benefits are taxable.

This combined total is what Massachusetts compares to the threshold. For example, if you are single with an AGI of $12,000, nontaxable interest of $500, and Social Security benefits of $15,000, your combined income is $12,000 + $500 + (half of $15,000) = $19,000. Since $19,000 exceeds the $17,200 threshold, you have taxable Social Security income in Massachusetts.

The taxable amount is not all your benefits. It is only the amount by which your combined income exceeds the threshold. In the example above, $19,000 minus $17,200 equals $1,800 of taxable Social Security income. At the 5.05 percent rate, your Massachusetts tax on Social Security would be about $91.

Federal taxation of Social Security is separate

The federal government also taxes Social Security benefits, but it uses different thresholds and rules. Federal combined income thresholds are $25,000 for single filers and $32,000 for married couples filing jointly. These thresholds have not changed since 1984 and are not adjusted for inflation, which means more people owe federal tax on their benefits each year.

You may owe federal tax on your Social Security even if you owe no Massachusetts tax, or vice versa. For instance, if your combined income is $18,000 as a single filer, you owe Massachusetts tax (above the $17,200 threshold) but no federal tax (below the $25,000 threshold). The two taxes are calculated independently on your federal Form 1040 and your Massachusetts Form 1 return.

Filing requirements when you receive Social Security

If you receive Social Security benefits, you must file a Massachusetts return even if your income is below the threshold and you owe no state tax. The state requires the return so it can verify your combined income against the threshold and confirm that no tax is owed. Failing to file when required can result in penalties, even if no tax was due.

You will report your Social Security benefits on Schedule B of your Massachusetts return (or the equivalent form for your filing status). The form walks you through the calculation of combined income and determines whether any of your benefits are taxable. If you use tax software, it will perform this calculation automatically once you enter your Social Security income.

Thresholds change each year

Massachusetts adjusts the Social Security income thresholds annually based on inflation. The state publishes updated thresholds in January or February for the previous tax year. For 2023, the thresholds were $16,800 (single) and $21,000 (married filing jointly). For 2024, they rose to $17,200 and $21,500. For 2025, check the Massachusetts Department of Revenue website for the current year's thresholds.

Because thresholds change, your tax situation may shift from year to year even if your income stays the same. If you were below the threshold last year, you might be above it this year. Conversely, if you were taxed last year, you might fall below the threshold in a lower-income year. Review your combined income each tax season to determine whether you owe Massachusetts tax on your benefits.

Withholding and estimated payments

If you owe Massachusetts tax on your Social Security benefits, you have two ways to pay: withholding or estimated tax payments. You can request that Massachusetts withhold state income tax directly from your monthly Social Security check by filing Form MW-507 with the Social Security Administration. This is often the simplest method because the withholding happens automatically each month.

Alternatively, if you have other income (such as wages, pensions, or investment income), your employer or financial institution may already be withholding enough to cover your Social Security tax. Check your withholding each year to make sure it covers both your regular income tax and any tax on your benefits. If withholding is not sufficient, you may owe when you file your return in April.

Special situations: Married filing separately and nonresidents

If you are married and file separately, Massachusetts applies a threshold of zero—meaning any Social Security income is potentially taxable. This is a significant penalty for married couples who file separately, so most couples benefit from filing jointly if they can. Consult a tax professional if you are considering separate filing.

If you are a Massachusetts resident but earned Social Security in another state, or if you moved to Massachusetts after receiving benefits, the state still taxes your benefits according to the thresholds above. Residency for tax purposes is determined by where you lived on December 31 of the tax year. If you are a nonresident or part-year resident, you may have different filing requirements; contact the Massachusetts Department of Revenue or a tax professional for guidance.

Frequently Asked Questions

Do I have to pay Massachusetts tax on my entire Social Security check?

No. Massachusetts only taxes the amount of your Social Security benefits that exceeds the threshold based on your combined income. If your combined income is below the threshold, none of your benefits are taxed. If it is above, only the excess amount is taxed.

What if I live in Massachusetts but work in another state?

Massachusetts taxes your Social Security benefits based on your residency on December 31 of the tax year. If you are a Massachusetts resident, the state applies its thresholds and tax rate. Income earned in other states does not change this rule. However, you may also owe tax to the other state; consult a tax professional about your multistate situation.

Can I reduce my combined income to avoid Social Security tax?

You can reduce your adjusted gross income through certain deductions (such as traditional IRA contributions or educator expenses), which would lower your combined income and potentially bring you below the threshold. However, half of your Social Security benefits are always included in combined income regardless of deductions, so there is a limit to how much you can reduce it.

Is the Massachusetts Social Security tax the same as the federal tax?

No. Massachusetts and the federal government use different thresholds, different calculation methods, and different tax rates. You may owe tax to one but not the other. Both taxes are calculated separately on your state and federal returns.

What documents do I need to file my Massachusetts return with Social Security income?

You will need your Social Security statement (Form SSA-1099), your federal Form 1040, and documentation of any nontaxable interest. If you have other income, gather W-2s, 1099s, or other income statements. Your tax software or preparer will guide you through what is needed for your specific situation.