The Trump administration will pay insurers in August for lowering out-of-pocket costs for low-income Obamacare insurers, but is still quiet on whether it will make payments in September or after.

The decision, relayed by a White House aide, comes about a day after the nonpartisan Congressional Budget Office estimated that if the Trump administration doesn't make the payments next year, that could lead to higher premiums for Obamacare customers.

The cost-sharing payments reimburse insurers for lowering copays and deductibles for low-income Obamacare customers.

While the Trump administration has been making the payments this year, insurers have been clamoring for a commitment for 2018 as they are finalizing plans for next year now. Some insurers have said they would raise premiums if the payments were not made in 2018, since they still have to lower out-of-pocket costs under the law.

The CBO estimated that Obamacare's gross premiums would rise by an average 20 percent next year and 25 percent by 2020 if President Trump cuts off the payments.