Warren Buffett's first tax bill at age 14 was $7. Now Berkshire Hathaway's is almost $27 billion—and he still says the rich don't pay enough

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Warren Buffett, who is worth $142 billion today and was once the richest man in the world, started out making mere pennies as a teenage paperboy.

The Oracle of Omaha filed his very first tax return in 1944 when he was just 14 years old for his earnings delivering newspapers in Washington, D.C. He owed only $7 in federal taxes, according to the two-page tax filing he shared with PBS News Hour in 2017.