Durability: separating the annuity from the spike

Every catalogue tells two stories at once. One is the number that gets quoted in a press release or a pitch deck: streams this quarter, a viral resurgence, a placement that briefly dominated a chart. The other is the number that actually services a loan or justifies a multiple: what the catalogue earns, on average, year after year, once the noise has faded. Royalty income durability is the discipline of telling these two stories apart before capital commits, not after.

The distinction matters because music income does not decay evenly. A song that spikes on the back of a sync placement, a dance trend or a single artist's current cultural moment can produce an extraordinary twelve months and then revert sharply. A song, or better still a catalogue of songs, that has been earning steadily for a decade or more through changes in format, platform and listening habit is a different asset entirely, even if its most recent annual figure looks less exciting on a slide.

Reading the decay curve

Durable income tends to share a few observable characteristics. It is spread across many compositions or recordings rather than concentrated in one or two, so no single algorithm change, artist dispute or licensing lapse can move the whole number. It draws from multiple rights streams, mechanical, performance, synchronisation and neighbouring rights, rather than depending on one channel. It has a earnings history long enough to show how the asset behaves across a full cycle, including periods when it was not fashionable. And it keeps being rediscovered through samples, covers, film and television placements and generational turnover in listening, rather than relying on the original release moment alone.

Noise looks different, and it is often more persuasive precisely because it is recent and vivid. A single viral quarter, extrapolated forward without adjustment, will overstate a catalogue's true run rate. A valuation built on the trailing twelve months of an asset that has just experienced an unusual spike inherits that spike's fragility. The number is real. The durability is not, unless there is evidence it will repeat.

Underwriting implications

For lenders and investors, the practical task is to separate the annuity component of a catalogue's income from the spike component, and to underwrite only the former with confidence. That means asking how much of last year's earnings came from a handful of unusual events, how concentrated the income is by asset and by rights type, and how the catalogue performed in years without a headline moment. It also means being sceptical of forward projections that assume the most recent period is representative, rather than exceptional.

None of this is a judgement on any particular deal or catalogue. It is a way of reading the same set of numbers that everyone else is looking at, and asking a more precise question than "how much did this earn." The better question is how much of that income has a reasonable claim to repeat, absent the specific event that produced it.

In music rights, as in any income-producing asset, the figure that attracts attention and the figure that survives diligence are not always the same figure. Separating them is not a technicality. It is the whole exercise.