The Insurance Institute for Highway Safety is forecasting a 3% increase in annual average annual premiums in 2019, a gain from the 3.4% it projected in the second quarter.
The report, released Tuesday, said the increases are due to rising insurance premiums and lower inflation.
The increase is due in part to the increase in the number of people in the United States with medical conditions, the report said.
The IHS said it expects premiums to rise in 2018 by 2.3%, a rise of 3.6%.
That is due to higher deductibles and out-of-pocket expenses, it said.
The premium increase is expected to continue in 2019.
The average premium for an insured person will rise by 6.9% in 2018, from $4,622 in 2018 to $5,821 in 2019 according to the report.
Insurance industry analysts surveyed by the IHS had expected average annual premium increases of 5.6%, a slight decrease from the 6.4%, forecast in its annual survey released earlier this month.
Insurance premiums are set to increase by an average of 8.4%.