The Congressional Budget Office reported its evaluation of the budget on July 13, 2017, including its effects over the 2018–2027 period.

Mandatory spending: The budget cuts mandatory spending by a net $2.033 trillion (T) over the 2018–2027 period.
This includes reduced spending of $1.891T for healthcare, mainly due to the proposed repeal and replacement of the Affordable Care Act (ACA/Obamacare); $238 billion (B) in income security ("welfare"); and $100 billion in reduced subsidies for student loans.
These savings would be partially offset by $200B in additional infrastructure investment.

Discretionary spending: The budget cuts discretionary spending by a net $1.851 trillion over the 2018–2027 period.
This includes reduced spending of $752 billion for overseas contingency operations (defense spending in Afghanistan and other foreign countries), which is partially offset by other increases in defense spending of $448B, for a net defense cut of $304B. Other discretionary spending (cabinet departments) would be reduced by $1.548T.
Revenues would be reduced by $1 trillion, mainly by repealing the ACA, which had applied higher tax rates to the top 5% of income earners.
Trump's budget proposal was not sufficiently specific to score other tax proposals; these were simply described as "deficit neutral" by the Administration.

Deficits: CBO estimated that based on the policies in place as of the start of the Trump administration, the debt increase over the 2018–2027 period would be $10.112T. If all of President Trump's proposals were implemented, CBO estimated that the sum of the deficits (debt increases) for the 2018–2027 period would be reduced by $3.276T, resulting in $6.836T in total debt added over the period.

CBO estimated that the debt held by the public, the major subset of the national debt, would rise from $14.168T (77.0% GDP) in 2016 to $22.337T (79.8% GDP) in 2027 under the President's budget.
The Congressional Budget Office reported its evaluation of the budget on July 13, 2017, including its effects over the 2018–2027 period.
Mandatory spending: The budget cuts mandatory spending by a net $2.033 trillion (T) over the 2018–2027 period. This includes reduced spending of $1.891T for healthcare, mainly due to the proposed repeal and replacement of the Affordable Care Act (ACA/Obamacare); $238 billion (B) in income security ("welfare"); and $100 billion in reduced subsidies for student loans. These savings would be partially offset by $200B in additional infrastructure investment.
Discretionary spending: The budget cuts discretionary spending by a net $1.851 trillion over the 2018–2027 period. This includes reduced spending of $752 billion for overseas contingency operations (defense spending in Afghanistan and other foreign countries), which is partially offset by other increases in defense spending of $448B, for a net defense cut of $304B. Other discretionary spending (cabinet departments) would be reduced by $1.548T.
Revenues would be reduced by $1 trillion, mainly by repealing the ACA, which had applied higher tax rates to the top 5% of income earners. Trump's budget proposal was not sufficiently specific to score other tax proposals; these were simply described as "deficit neutral" by the Administration.
Deficits: CBO estimated that based on the policies in place as of the start of the Trump administration, the debt increase over the 2018–2027 period would be $10.112T. If all of President Trump's proposals were implemented, CBO estimated that the sum of the deficits (debt increases) for the 2018–2027 period would be reduced by $3.276T, resulting in $6.836T in total debt added over the period.
CBO estimated that the debt held by the public, the major subset of the national debt, would rise from $14.168T (77.0% GDP) in 2016 to $22.337T (79.8% GDP) in 2027 under the President's budget.
2018 United States federal budget