The largest proportion of federal revenues in the U.S. comes from personal income taxes, which account for more than 40% of total revenue. Social insurance taxes follow as a significant contributor. Excise taxes and borrowing provide less revenue in comparison. ;
The largest proportion of federal revenues in the U.S. comes from personal income taxes, accounting for over 40% of total revenue. Social insurance taxes follow, contributing another significant portion. In contrast, excise taxes and borrowing contribute much less to federal revenues.
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