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Tax facts & stats
6 sourced facts about taxes, each with the context behind the number. 4 more are in today's round and appear here after it closes.
Expert level
Which OECD country collected the least tax relative to GDP in 2024?
AnswerMexico (18.3%)
Mexico's ratio was less than half of top-ranked Denmark's 45.2%.
Source: OECD, Revenue Statistics 2025 (2024) oecd.org
About how many tax return audits did the IRS close in fiscal 2025?
Answer497,621
Those audits resulted in $26.8 billion in recommended additional tax — out of hundreds of millions of returns filed.
Source: IRS, SOI Tax Stats – IRS Data Book, FY2025 (2025) irs.gov
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