Premiums would increase for the “vast majority” of ObamaCare enrollees under the Senate Republican repeal bill, and especially for older and low-income people, a new study finds.

The study from the Kaiser Family Foundation finds that premiums would increase by an average of 74 percent, from $197 to $342, for the most popular type of plan.

The analysis looks at the cost of a mid-level “silver” plan after financial assistance is factored in. The GOP bill cuts back on that financial assistance, leaving most people to pay a higher share of premiums themselves.

The spikes are particularly high for older and low-income people. Someone between ages 55 and 64 making less than 200 percent of the poverty line would see their premium more than triple, from $69 to $272.

“The vast majority of marketplace enrollees would pay higher premiums in 2020 for a silver plan,” the study finds. “Older and lower income enrollees see the biggest increases.”

Deductibles are also likely to increase under the bill. The measure encourages people to enroll in a less-generous “bronze” plan with a lower premium but higher deductible. The bill also eventually ends financial assistance for low-income people on their deductibles, known as “cost-sharing reductions.”

Due to the higher premiums and higher deductibles, “few low-income people would purchase any plan” under the Senate GOP bill, the Congressional Budget Office said in an analysis released Monday.