According to the Congressional Budget Office, the House bill unveiled on Thursday is projected to cost $1.055 trillion with those costs fully offset by taxes and spending cuts. The Senate bill is not done, but the bill approved by the Senate Finance Committee was projected to cost $829 billion, also fully offset.

And now one more bit of fine print. The budget office, in its report on the House bill, warned that its analysis was preliminary in a section titled “Important Caveats Regarding This Preliminary Analysis.”

“For a number of reasons, the preliminary analysis that is provided in this letter does not constitute a final and comprehensive cost estimate,” the budget office wrote. “Although C.B.O. completed a preliminary review of legislative language prior to its release, the agency has not thoroughly reviewed the introduced legislation to verify its consistency with the previous draft. Moreover, the analysis does not reflect all of the provisions of the bill.”

In other words: the numbers could change.