Massachusetts High Court Removes $5 Billion Income Tax Cut from November Ballot

BOSTON — The Massachusetts Supreme Judicial Court on Thursday blocked a high-stakes ballot initiative that would have cut the state’s personal income tax rate by 20%, ruling that the official summary provided to voters was unconstitutionally flawed and misleading.

The decision, issued June 18, 2026, removes the question from the November ballot, abruptly ending a contentious political battle that pitted business advocacy groups against labor unions and Democratic legislative leaders. Proponents had argued the cut from 5% to 4% was necessary to make the state more competitive, while opponents warned it would blow a $5 billion hole in the annual state budget, jeopardizing public services.

This kind of last-minute judicial intervention, while legally sound, injects a level of uncertainty that is challenging for business owners. In our experience, stable and predictable tax policy is paramount for effective long-term financial planning. When potential multi-billion-dollar changes to the tax code are on the table one month and gone the next, it complicates crucial decisions around capital investment and hiring.

The court’s unanimous ruling hinged on a critical error in the ballot summary prepared by the office of Attorney General Andrea Campbell. The summary incorrectly stated that the tax rate on long-term capital gains would remain unchanged by the proposed law. However, the justices found that because the state’s capital gains tax rate is statutorily tied to the personal income tax rate, a reduction in one would automatically trigger a reduction in the other.

“The summary’s contrary statement is not a minor imprecision. It is significantly misleading and likely to influence voters,” Justice Serge Georges Jr. wrote in the court’s decision. The SJC concluded that the Attorney General “did not provide a ‘fair’ summary” as required by the state constitution.

The campaign to lower the income tax was led by a coalition called Taxpayers for an Affordable Massachusetts and supported by business groups including the Massachusetts High Tech Council and the Pioneer Institute. They argued that Massachusetts is becoming too expensive for residents and businesses and that a tax cut would spur economic activity. Public polling had indicated broad support for the measure.

Following the ruling, proponents expressed deep disappointment, framing the decision as a technicality that disenfranchises voters. “This decision disenfranchises millions of Massachusetts voters,” said Chris Keohan, a spokesperson for the campaign. “We’re deeply disappointed that due to the Attorney General’s summary, voters won’t have the opportunity to decide on a measure with significant implications for their finances and for the state’s competitiveness.”

Jim Stergios, executive director of the Pioneer Institute, noted the irony that the outcome was determined by a government error. “The Court’s decision rests on a drafting error in the Attorney General’s summary of the petition—a matter entirely outside the control of voters and petition signers,” Stergios said in a statement.

The confusion over the capital gains rate is a textbook example of how interconnected tax statutes can be. It’s a reminder that what appears to be a simple change can have complex downstream consequences that affect everything from individual tax returns to corporate balance sheets. This is precisely where professional tax preparation and compliance services become critical, ensuring that businesses are not caught off guard by nuances in the law. Navigating this landscape of constant change and legal complexity is a core part of what we do for our clients at C&S Finance Group LLC at csfinancegroup.com.

While the SJC has blocked ballot questions in the past—including the first version of the “millionaires tax” in 2018 and a measure on gig worker classification in 2022—it is rare for a question to be invalidated solely because of a flawed summary from the attorney general. The court cited a 1951 precedent where a law was undone because its ballot summary was not “fair.”

The ruling stands in contrast to another decision issued just a week prior, in which the SJC allowed a ballot measure concerning cannabis legalization to proceed despite complaints about its summary. In that case, the court determined the summary was not clearly erroneous and that it “is not the only source of information for voters.” In the income tax case, however, Justice Georges wrote that campaign materials and other voter information could not “cure” the significant error regarding capital gains, making the flaw fatal to the initiative’s placement on the ballot.

The court’s action effectively grants a major victory to opponents, who can now avoid a costly campaign against a popular, but in their view, fiscally irresponsible proposal. They had consistently warned that a $5 billion annual revenue reduction would lead to devastating cuts in education, transportation, and healthcare.

Proponents of the tax cut are now evaluating their options. Keohan stated the campaign is “exploring next steps,” which could include an attempt to resubmit the question for the 2028 ballot. For now, the debate over Massachusetts’ tax structure and its impact on the state’s economic competitiveness will return to the legislature, though the fundamental tensions that fueled the ballot initiative remain unresolved.