Healey proposed the temporary tax break last month, saying it would save consumers an estimated $120 million. Her administration proposed covering the cost with excess revenue from the state’s tax on high earners, often called the “millionaire’s tax.”

“I am disappointed and I am going to keep fighting for it,” Healey said Tuesday night. She argued that residents need relief as costs rise, including at the pump, and said the state has money available for the measure.

The chair of the House Ways and Means Committee raised concerns about whether gas stations would pass the savings on to drivers or raise prices to offset the proposed 24-cent-per-gallon reduction.

Mike Minogue, the Republican candidate for governor, criticized Healey for failing to secure support from the Legislature. Minogue has separately proposed eliminating the gas tax, saying he would pay for it by identifying waste, fraud and abuse in state government.

Drivers interviewed about fuel costs described changing their routines. Mike Ballas said his wife switched to a hybrid, the family takes fewer trips, and their children now largely carpool to soccer. Sharon Bracket, who drives from Boylston to Boston four times a week, said she fills up twice weekly and pays nearly $6 a gallon for premium fuel. She questioned whether a 24-cent reduction would make a substantial difference amid broader cost increases.

The committee’s decision leaves Healey’s proposed gas-tax holiday out of the supplemental budget now under consideration, with no full vote on the plan ahead.