What it is
Year-over-year (YoY) is a financial comparison method that measures changes in a company's performance or an economic indicator between a specific period (e.g., a quarter or a month) in the current year and the identical period in the previous year. This approach helps to smooth out seasonal fluctuations, providing a clearer picture of underlying growth trends and the fundamental health of a business over a longer horizon.
YoY growth rates are widely used in earnings reports and economic data releases to assess consistent progress or decline. For example, comparing Q1 2024 revenue to Q1 2023 revenue gives a strong indication of growth without the distortion of typical seasonal variations that might affect quarter-over-quarter comparisons. Investors rely on YoY figures to evaluate long-term performance and strategic execution.
Why it matters
YoY comparisons reveal consistent growth or decline by removing seasonal distortions, offering a clearer view of a company's long-term health. It's a reliable growth indicator.
Reviewed under editorial standardsUpdated September 26, 2026Not investment advice