Definition
Year-over-year (YoY) growth is the percentage change in a metric compared to the same period in the previous year. Founders reach for it when a vague conversation needs a shared, specific meaning. Name it clearly, then let the next decision — a hire, a price, a test, or a pass — follow from that meaning.
In the room
How the word shows up in a real conversation.
A mentor asks, “What is your Year-over-year (YoY) growth?” The useful answer is concrete: percentage change in a metric compared to the same period in the previous year. A slide title is not an answer.
Common mistake
Using Year-over-year (YoY) growth as a label instead of a fact. If you cannot point to the evidence — a number, a customer, or a written assumption — you are using the word as jargon.
See also
X-Y Analysis (compare two set of data)
Method of comparing two different datasets to identify relationships and patterns.
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Y Combinator
Famous startup accelerator that provides funding and mentorship to early-stage companies.
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Yield management
Strategy of maximizing revenue by adjusting prices based on demand and capacity.
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Yield on investment
Financial return generated from an investment, expressed as a percentage.
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