Commercial
YoY (Year-over-Year)
Year-over-Year
Definition
Year-over-year comparison, measuring change from the same period one year prior. The standard time-comparison frame in operator reporting and industry analysis.
Why it matters
YoY comparisons control for seasonal effects that affect gambling activity (sports calendars, holiday periods, major event timing) and provide a stable basis for tracking underlying performance trends. Operator earnings reports, market data releases, and industry analysis routinely express metrics as YoY growth or decline. The comparison normalizes for base periods, with caveats around comparability if business mix has shifted materially between periods.
The limitations matter. YoY comparisons assume base-period comparability that doesn't always hold. A regulated market launch creates massive YoY growth in early periods, normalizing to slower growth as the market matures. Major M&A reshapes operator reporting, creating non-comparable YoY numbers. Regulatory changes (UKGC affordability, German GGL constraints) create step changes that distort YoY trends. Analysts adjust for these by reporting "like-for-like" or "organic" growth that excludes structural changes, alongside headline YoY numbers.
Frequently asked questions
Why use YoY rather than quarter-over-quarter?
Seasonality. Most gambling activity has significant intra-year patterns (sports seasons, holidays, major events) that make sequential quarter comparisons misleading. YoY removes the seasonal effect by comparing the same period of year. Quarter-over-quarter is sometimes used for trends within longer flat periods, but YoY is the default.
What's "like-for-like" YoY?
A version of YoY adjusted for structural changes: new market launches, M&A, currency effects, regulatory step changes. Like-for-like attempts to isolate organic operational performance. Operators typically report both headline YoY (including all factors) and like-for-like (organic only) to give a fuller picture.