Work in Massachusetts, Live in Connecticut: How Taxes Work

Reciprocity

Do Massachusetts and Connecticut Have a Tax Reciprocity Agreement?

No. Massachusetts and Connecticut have never signed a reciprocity agreement. Massachusetts has no reciprocity arrangements with any state, and Connecticut has no reciprocity arrangements with any state either. A Connecticut resident earning wages for services performed inside Massachusetts cannot ask a Massachusetts employer to withhold only Connecticut tax instead of Massachusetts tax.

Without reciprocity, the MA employer must withhold Massachusetts income tax on wages tied to services performed inside Massachusetts. The Connecticut resident then files returns in both states each year and claims a credit on the Connecticut return for the income tax paid to Massachusetts. The credit prevents double taxation on the same dollars, but it does not eliminate the two return filing requirement.

Route I-84 and Route I-91 carry thousands of Connecticut residents into Massachusetts every workday, especially into the Springfield, Worcester, and Boston commuter belts. That two return situation is one of the most common multi-state filings in the Northeast, so brokerages, benefits departments, and payroll teams in both states are used to it.

Filing Obligations

Which Tax Returns Do I File as a CT Resident Working in MA?

File the Massachusetts nonresident return (Form 1-NR/PY) first. You need the final Massachusetts tax figure before you can calculate the Schedule 2 credit on your Connecticut return. On the MA return, report only the income sourced to Massachusetts. On CT-1040, report all worldwide income as a Connecticut resident and then claim the credit for MA taxes paid on Schedule 2.

Massachusetts requires nonresidents to file Form 1-NR/PY if their Massachusetts source income for the year exceeded the smaller of the apportioned personal exemption or $8,000. Both returns are due April 15 following the end of the tax year. Massachusetts accepts a federal extension for filing purposes; Connecticut requires its own extension request. Interest and any late payment penalty still accrue on any balance not paid by April 15.

Resident Credit

How Does the CT Schedule 2 Credit Prevent Double Taxation?

Connecticut taxes its residents on all worldwide income. Massachusetts taxes nonresidents on income earned from services performed inside Massachusetts. Without a credit, both states would tax your MA wages. Connecticut's Schedule 2 handles that by giving a resident credit for income tax paid to a qualifying jurisdiction.

A qualifying jurisdiction includes another state of the United States, and Massachusetts qualifies. Compensation received for personal services performed inside Massachusetts is treated as income derived from that jurisdiction. The credit is the lesser of the tax you actually paid to Massachusetts on that income or the Connecticut tax attributable to the same income. If you have income taxed by more than one jurisdiction, you compute a separate credit column for each on Schedule 2.

You must attach a copy of your completed Massachusetts return to CT-1040 when claiming the Schedule 2 credit, or Connecticut will disallow it. If you file the CT return electronically, keep the MA return with your records and be ready to provide a copy to Connecticut on request.

MA Rates

How Do the Massachusetts Flat Rate and 4% Surtax Apply?

Massachusetts taxes wage income at a flat 5.0% rate. On top of that, Massachusetts voters approved a 4% surtax on taxable income above an inflation-adjusted threshold. For tax year 2025 the surtax threshold is $1,083,150. For tax year 2026 the surtax threshold is $1,107,750. Income above the threshold is taxed at 9% (the 5% base plus the 4% surtax); income below stays at 5%.

For most Connecticut commuters earning under the surtax threshold, only the 5% rate applies to the MA source portion of wages. Connecticut's graduated rate schedule tops out at 6.99% for high incomes, so a Connecticut resident's Schedule 2 credit for MA taxes typically covers the CT tax on the same wages at ordinary income levels. If your income clears the MA surtax threshold, the extra MA tax is claimable on Schedule 2 as well, up to the CT tax on that income. Verify current CT bracket amounts on the Connecticut DRS website when preparing your return.

Employer Withholding

How Does My Employer Handle Withholding Across State Lines?

Your Massachusetts employer withholds Massachusetts income tax on wages earned for services performed inside Massachusetts. This is required by MA law and does not depend on where you live. The employer does not withhold Connecticut income tax on those same wages.

Because only MA tax comes out of your paycheck automatically, you may owe Connecticut a balance at year end when the MA credit does not fully cover your CT liability. To manage cash flow, consider:

• Quarterly estimated payments to Connecticut if you expect to owe CT at filing time. CT estimated payments follow the federal schedule of April 15, June 15, September 15, and January 15.
• Additional voluntary CT withholding if your employer's payroll system supports it, or through a spouse's job that is CT-sourced.
• An annual review with a payroll change whenever your income, filing status, or physical work location shifts significantly.

If you change jobs mid-year or take a promotion that shifts the work location, update your withholding promptly to avoid an underpayment penalty on the CT return.

Worked Example: CT Resident Earning $90,000 in MA

Single filer, all wages from MA employer, 5% MA flat, illustrative CT tax

Remote Work

What Happens If I Work Remotely from Connecticut for an MA Employer?

Massachusetts does not currently apply a convenience of the employer rule to nonresidents. If you live in Connecticut and work from a Connecticut home office for a Massachusetts employer, the days you are physically outside Massachusetts are not Massachusetts source income. Only the days you are physically inside Massachusetts create MA source wages that MA can tax.

Fewer physical MA days therefore mean a smaller MA tax bill, a smaller CT Schedule 2 credit, and often a larger CT balance owed. Total state tax can end up similar either way, but the split between states depends on how many days you actually work inside Massachusetts. Track your workday location by day, because MA can request evidence for the allocation during a nonresident audit. Massachusetts imposed a temporary pandemic era regulation from March 10, 2020 that treated remote days as MA source; that rule has expired and has not been renewed as permanent law, so today's day count controls.

Connecticut has its own convenience of the employer test that applies only reciprocally, meaning it kicks in only when the nonresident's home state applies a similar test to Connecticut residents. Because Massachusetts does not currently apply such a test, Connecticut also does not source a Massachusetts resident's home office days back to Connecticut under this reciprocal provision. Practical effect: neither state pulls remote days into its tax base for this pair, so wages tied to actual physical work location are what each state taxes.

Mid-Year Move

What If I Moved Between Massachusetts and Connecticut During the Year?

If you moved during the year, file as a part-year resident in each state. Massachusetts handles both the part-year and nonresident scenarios on Form 1-NR/PY by checking the appropriate box and reporting the resident and nonresident portions separately. Connecticut uses Form CT-1040NR/PY for part-year residents and nonresidents.

During the months you lived in Massachusetts, MA taxes you as a resident on all income from every source. During the months you lived in Connecticut, Connecticut taxes you as a resident on all income and Massachusetts taxes you only on MA source income. The Schedule 2 credit still applies for the period where both states claim the same wages. Keep dated evidence of your move (a signed lease, utility activation, driver's license change, and voter registration) because residency depends on domicile as well as physical presence. Update your employer's payroll address on the day of the move so withholding tracks your current residency and you avoid a big year-end reconciliation.

Local Taxes

Are There Any Local Income Taxes in This Corridor?

Neither Massachusetts nor Connecticut imposes a local, county, or municipal income tax on wages. Your total state and local wage tax bill in this commute corridor is Massachusetts income tax on your MA source amount plus any Connecticut balance after the Schedule 2 credit. That two tax picture is simpler than corridors such as NY to CT, where New York City residency can add a local income tax layer, or Ohio and Kentucky, where city and school district income taxes stack on top of the state rate.

Two related pages you may find useful: our state reciprocity agreements list and our page on working in MA while living in NH. Both explain how the New England states handle cross-border wages under different residency mixes.