The IRS collected a little more than $4 trillion in net taxes (after refunds) in fiscal year 2023. About half was individual income taxes, and around 35% was employment (payroll) taxes, including Social Security, Medicare, unemployment insurance, and railroad retirement.
Business income taxes made up a little over 10% of the total, with relatively small contributions from excise, estate and trust income, and estate and gift taxes.
Source: Internal Revenue Service, April 2024
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