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Year-over-year growth (YoY)

The change in a figure compared with the same period a year earlier, as a percentage. Comparing a quarter with the same quarter last year avoids seasonal swings.

Simple example

Revenue was $80 in the third quarter last year and $100 in the third quarter this year. Year-over-year growth is ($100 − $80) ÷ $80 = 25%.

$80Q3 last year$100Q3 this year+25%(100 − 80) ÷ 80
Made-up numbers, for illustration only.

Related terms

Compound annual growth rate (CAGR)The steady yearly growth rate between a start and an end value.Organic growthGrowth from the existing business, without acquisitions.Fiscal yearThe 12-month period a company uses for its accounting.