Partially False: Inflation Did Hit 4.2% — But It Was April, Not May, and It Was a 12-Year High, Not Three

The claim that inflation hit a three-year high of 4.2% in May 2021 gets the headline number right but fumbles the details in ways that matter. The 4.2% figure is real — but it describes April 2021, not May. And calling it a three-year high dramatically understates how unusual the reading was.

According to the U.S. Bureau of Labor Statistics, U.S. consumer prices rose 4.2% year-over-year in April 2021. That data was released to the public in May 2021, which is likely where the month confusion crept in. The release date got mistaken for the reference month.

The Federal Reserve Bank of St. Louis confirms that before April 2021, inflation had not been anywhere near 4.2% since September 2008 — more than 12 years earlier. Reuters and the Associated Press both reported it explicitly as the largest price gain in over a decade. Describing it as a "three-year high" isn't just slightly off; it cuts the historical significance by three-quarters.

To make things more striking: May 2021 inflation, the actual month named in the claim, came in even higher at 5.0%. So the claim not only misidentifies the month — it also undershoots what that month's real number was.

The core figure here is accurate enough to sound credible, which is exactly what makes the errors sticky. Someone skimming a headline sees a real, alarming number and shares it. The wrong month and the softened "three-year high" framing travel along for the ride. When you see inflation figures in the news, always check whether the report date and the reference month are the same — they often aren't — and look at how the figure is being compared to history.