year-over-year

American  

[yeer-oh-ver-yeer] / ˈyɪərˈoʊ vərˈyɪər /

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

In a report, the analyst points the broad strength across the business, including 9% year-over-year growth in organic services revenue, the third consecutive quarter of acceleration.

From The Wall Street Journal • Jun. 5, 2026

In a report, the analyst points the broad strength across the business, including 9% year-over-year growth in organic services revenue, the third consecutive quarter of acceleration.

From The Wall Street Journal • Jun. 5, 2026

The consensus forecast calls for a 4.2% year-over-year rise.

From Barron's • Jun. 5, 2026

With more than 90% of S&P 500 companies reporting results for the first quarter so far, year-over-year growth in earnings per share is up about 29%, according to estimates from financial-data firm LSEG.

From The Wall Street Journal • Jun. 5, 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