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What is YoY?

Definition

YoY

YoY (Year-over-Year) is a growth metric that compares a financial or operational performance measure in a specific period to the exact same period in the previous year.

Why It Matters for Startups

Essential for navigating early-stage business execution; mastering YoY allows founding teams to scale operations, manage risk, and optimize efficiency for annual growth velocity and seasonality analysis.

Detailed Deep Dive

YoY (Year-over-Year) is a growth metric that compares a financial or operational performance measure in a specific period to the exact same period in the previous year, eliminating seasonal variations.

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Frequently Asked Questions

Q:Why is YoY growth preferred over MoM growth?

YoY eliminates seasonal variations (e.g. slow sales in December) to show true underlying annual growth.

Q:How is YoY growth calculated?

YoY = ((Current Period Value - Previous Year Period Value) / Previous Year Period Value) x 100.

Quick Facts

  • CategoryMetrics
  • Key ApplicationAnnual growth velocity and seasonality analysis

Coverage Trend12 Weeks

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Cite This Term

Reference this definition in your articles, research, or documentation to credit this source:

[YoY | SPIDITS Glossary](https://spidits.com/startup-glossary/yoy)

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