Recurring revenue
Income that repeats by default (memberships, retainers, subscriptions) rather than being re-won each time. Priced above one-off revenue by buyers because it transfers.
Revenue is recurring when the default is that it continues: a gym membership, a monthly bookkeeping retainer, a coffee subscription. The commercial magic is the reversal of effort: one-off revenue must be won every time, recurring revenue must be actively lost.
Buyers pay a premium for it because it survives the ownership change and de-risks the first year. Owners feel the benefit earlier: predictable cash flow, smoother staffing, and marketing that adds to a base instead of refilling a leaky bucket. Its health is measured together with churn; growth in sign-ups means little if the bucket leaks as fast as it fills.
Practical models for salons, clinics, gyms, cafes, and service businesses are in recurring revenue for local businesses.