year-over-year

American  

[yeer-oh-ver-yeer] / ˈjɪərˈoʊ vərˈjɪər /

Or year over year

adverb

Accounting, Finance.

1. as compared with the corresponding figure 12 months earlier; involving or reckoned by such a comparison: YoY

   Exports fell 2 percent year over year in May.

   February rents for one-bedroom apartments saw a year-over-year increase of 6 percent.

2. in each year that passes after an initial investment, the start of an observed trend, etc.; annual or annually.

   The gain from this software purchase has been our best ROI year over year.

   Over the last decade, the year-over-year trend in inflation has strongly correlated with the year-over-year trend in GDP.

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Etymology

Origin of year-over-year

First recorded in 1790–1800, for an earlier sense

Example Sentences

Roughly 2.25 million units of these glasses shipped in the first quarter of this year, a 167% jump year-over-year.

From Los Angeles Times • Jun. 16, 2026

Dollar-denominated exports surged almost 20% year-over-year in May, suggesting Beijing is unlikely to roll out stimulus soon.

From The Wall Street Journal • Jun. 16, 2026

That was the eighth straight month of year-over-year declines, according to the China Passenger Car Association.

From The Wall Street Journal • Jun. 12, 2026

Malik expects AMD’s AI revenue to reach $33 billion in 2027, which would represent growth of 137%, and $50.8 billion in 2028, which would be a 54% year-over-year jump.

From MarketWatch • Jun. 12, 2026

In December 2007 inflation reached 4.1% on a year-over-year basis, or higher than the upper limit of the National Bank of Poland's target range.

From The 2008 CIA World Factbook by United States. Central Intelligence Agency