Total tax revenue (including federal, state, and local taxes) as a share of GDP was 24% for the US in 2018, having declined after the 2017 tax law changes. The US ranked 33rd out of 36 OECD countries, and below all other G7 countries.
December 16, 2019
48% of all individual income tax returns filed for tax year 2017 were by single filers, 36% by those married filing jointly and surviving spouses, 14% by heads of households, and 2% by those married but filing separately.
December 9, 2019
Payroll tax revenues as a share of GDP increased steadily for four decades as the tax rates and base increased, but then leveled off after 1988 at around 6.5 percent of GDP. Since 2000, the share has declined, reaching 5.8 percent of GDP in 2018.
December 2, 2019