Bonus cost is the total value an operator gives away in promotions — welcome offers, reloads, free spins, free bets, cashback, loyalty rewards — over a period. Bonus ratio expresses it relative to a base, most often bonus cost as a percentage of gross gaming revenue or of deposits.
Definition
Bonus cost is the total value an operator gives away in promotions — welcome offers, reloads, free spins, free bets, cashback, loyalty rewards — over a period. Bonus ratio expresses it relative to a base, most often bonus cost as a percentage of gross gaming revenue or of deposits.
It is a core efficiency metric because bonuses are usually the largest controllable cost between GGR and net revenue, and because the ratio reveals whether growth is being bought profitably or rented with giveaways.
Measuring bonus cost properly means counting the real economic cost, not the face value. A 100-unit bonus with 40x wagering that most players never clear costs the operator far less than 100; a low-wagering or cashable offer costs close to face value.
Analysts model expected bonus cost per cohort using historical clearance rates, so the headline promo generosity is translated into an actual margin impact.
In context
In iGaming analytics, bonus cost is where acquisition quality and CRM discipline become visible. A rising bonus ratio with flat or falling retention means the operator is paying more to attract players who leave when the offer ends — a sign of bonus-hunter traffic or overly generous welcome terms.
A stable bonus ratio with rising lifetime value means promotions are being targeted well: given to players who respond with sustained play rather than sprayed across the base.
Bonus cost also feeds affiliate economics directly. Under NGR-based revenue share, bonus cost is deducted before the affiliate's commission is calculated, so heavy promotion on an affiliate's cohort lowers that affiliate's pay — a recurring source of dispute when the deduction terms are vague.
Under CPA, bonus cost is the operator's risk alone, which is why CPA offers come with qualification thresholds designed to ensure the player's expected value exceeds the CPA plus the welcome bonus. Analysts watch bonus cost per FTD, bonus cost as a share of NGR by cohort, and the ratio of bonus-funded to cash-funded play, using these to tune offer sizes, wagering requirements, and which segments get promoted to at all.
Worked example
An operator's bonus ratio rises from 22% to 34% of GGR over a quarter while day-30 retention falls. Cohort analysis shows the jump is concentrated in one affiliate's traffic, which clears welcome bonuses at triple the site average and rarely redeposits.
The operator moves that affiliate to a CPA with a strict qualification threshold and tightens the welcome wagering requirement.
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