What Is Net Gaming Revenue (NGR)? Formula, Calculation, and Why It Matters for Affiliate Commissions

Net gaming revenue (NGR) is the amount of money an iGaming operator retains from player activity after deducting bonuses, chargebacks, payment processing fees, and applicable taxes from gross gaming revenue (GGR). It is the figure most rev-share affiliate contracts use as the commission base, which is exactly why understanding its components matters before you sign anything.

This article is for affiliate managers and affiliates who keep seeing NGR in contracts and partner dashboards but are not fully confident explaining why the payout number is lower than the GGR figure shown elsewhere. By the end, you will know the formula, the deduction categories, how the math plays out differently for casino versus sportsbook products, and the right questions to ask before committing to an NGR-based deal.

---

What Is the Difference Between NGR and GGR?

GGR is the starting point. NGR is what remains after operator costs are removed.

Gross gaming revenue (GGR) equals total player wagers minus total winnings paid out, before any operator costs are applied. It represents the theoretical house take. The European Gaming and Betting Association (EGBA) (2025) tracks GGR as the standard cross-market measure of operator size, with sports betting accounting for 45% and casino 29% of European online GGR in 2024.

NGR takes GGR and subtracts the costs the operator incurs to generate that revenue. The practical gap between the two figures can be significant, which is why affiliates on a “35% rev-share” deal are actually receiving 35% of a number that is often materially smaller than the GGR they see in a dashboard.

A relevant regulatory nuance: the UK Gambling Commission uses a related but distinct term. The Gambling Commission stated: “Unlike many other gambling regulators, our regulatory returns ask for figures on GGY not Gross Gambling Revenue (GGR). Operators must ensure they report GGY figures to us, not GGR.” Gross Gambling Yield (GGY) in UK regulatory reporting aligns closely with what the industry calls GGR, but operators in GB-licensed programs should confirm which measure their affiliate contracts reference. [Source: UK Gambling Commission (2024)]

---

How Is NGR Calculated? The Formula

The core formula is straightforward:

NGR = GGR minus Bonuses minus Chargebacks minus Payment Processing Fees minus Applicable Taxes

The affiliate commission then becomes:

Affiliate Payout = NGR x Revenue Share Percentage

Where it gets complicated is in how each deduction category is defined, capped, or applied. There is no single regulatory standard for NGR in the way there is for GGY under UK rules. The MGA, Curaçao, and other licensing jurisdictions do not mandate a uniform NGR formula for affiliate contracts, meaning the definition is set at the operator level, inside the program terms.

---

What Costs Are Deducted From GGR to Get NGR?

The deduction list varies by operator, but most fall into three tiers of industry acceptance.

The NGR Deduction Taxonomy

Deduction Category	Acceptance Level	Notes
Welcome bonuses and free spins	Universally accepted	Core player acquisition cost; always deducted
Reload and loyalty bonuses	Universally accepted	Ongoing retention costs; nearly always included
Chargebacks and disputed transactions	Universally accepted	Payment reversals reduce net receipts directly
Payment processing fees	Commonly accepted	Most programs include this; rates and caps vary
Jackpot contributions	Commonly accepted	Progressive jackpot contributions are operator costs
Applicable gaming taxes	Commonly accepted	Market-specific; UK Remote Gaming Duty is 21% of GGR
Fraud-related voids	Commonly accepted	Transactions reversed for verified fraud
Third-party game provider fees	Contested	Some operators deduct game content costs; most do not
Customer service and overhead allocation	Contested	Rare and generally considered unfair to affiliates
Liquidity or hedging costs (sportsbook)	Contested	May appear in sportsbook programs for risk management costs

The first two columns represent the territory most affiliate contracts defend as legitimate. The contested category is where disputes arise. If you see deduction language broad enough to cover “operational costs,” push back or seek clarification before signing.

---

Worked Examples: Casino vs. Sportsbook NGR Calculations

The same GGR figure produces very different NGR outcomes depending on the product vertical.

Casino scenario (online slots, one month, one affiliate cohort)

Line Item	Amount
Total player wagers	£500,000
Total winnings paid out	£460,000
GGR	£40,000
Minus welcome and reload bonuses (30% of GGR)	£12,000
Minus chargebacks (1.5% of GGR)	£600
Minus payment processing fees (2% of GGR)	£800
Minus UK Remote Gaming Duty (21% of GGR)	£8,400
NGR	£18,200
Affiliate payout at 35% rev-share	£6,370

Sportsbook scenario (same GGR, same affiliate cohort)

Line Item	Amount
Total stakes	£800,000
Total winnings paid out	£760,000
GGR	£40,000
Minus free bet and enhanced odds costs (15% of GGR)	£6,000
Minus chargebacks (0.8% of GGR)	£320
Minus payment processing fees (2% of GGR)	£800
Minus applicable point-of-consumption tax (21% of GGR)	£8,400
NGR	£24,480
Affiliate payout at 35% rev-share	£8,568

Starting from the same GGR, the casino affiliate earns £6,370 and the sportsbook affiliate earns £8,568. The main driver is bonus cost: casino products, especially slots with welcome offers, carry higher bonus-to-GGR ratios than sportsbook products where free bet costs are typically lower as a percentage of turnover. Bonus deduction rates are not a universal published benchmark and vary significantly by operator and market. Ask for historical bonus deduction rates as part of your deal due diligence.

For context on market scale: the UK Gambling Commission (2025) reported that the Remote Casino, Betting and Bingo sector generated £7.8 billion in GGY for April 2024 to March 2025, a 13.1% increase on the prior year. At those volumes, even a 1 percentage point difference in NGR deduction methodology translates into material affiliate commission differences across large programs.

---

How Does NGR Volatility Affect Affiliate Payouts?

NGR-based rev-share creates structural income volatility for affiliates that CPA deals do not.

When a referred player has a large winning month, their GGR contribution drops or goes negative. If an operator applies negative NGR carryover, that loss offsets positive contributions from other players in the same cohort, reducing or eliminating the affiliate’s commission for the period. Some programs reset negative NGR at month end; others carry it forward indefinitely. This is one of the most consequential clauses in any rev-share agreement.

Rank Group reported 9% like-for-like NGR growth to £734.4m for FY 2024, with underlying operating profit increasing 131% over the same period, illustrating how closely NGR tracks profitability and why operators treat it as their core performance metric. [Source: Gambling Insider (2024)]

For affiliates, NGR-based rev-share rewards you when your referred players are consistent losers and punishes you when they are not. Understanding how an operator handles negative balance carryover before signing is not optional.

---

How Should NGR Appear in Affiliate Platform Dashboards?

Affiliate management platforms including Cellxpert, Netrefer, Affilka, and Income Access all provide NGR reporting, but the level of component visibility varies.

A well-run program shows affiliates not just the final NGR figure but the underlying components: GGR, total bonus cost deducted, chargebacks, and processing fees. When affiliates see only the final NGR number, they have no way to audit whether deductions are consistent with contract terms. Disputes almost always start when a final figure is lower than expected and the breakdown is inaccessible.

As an affiliate manager, confirm that your platform can expose component-level NGR data, not just the output. If it cannot, affiliates must request manual breakdowns, which creates support burden and erodes trust.

---

The NGR Audit Checklist Before Signing a Rev-Share Deal

This checklist applies whether you are an affiliate evaluating a program or an affiliate manager reviewing what your own terms actually say.

1. What is the precise NGR definition in the contract? Require a written list of every deduction category included.
2. Are bonus deductions capped as a percentage of GGR? An uncapped bonus deduction is a significant risk in high-promotion periods.
3. Does negative NGR carry over to future months? If yes, over how many months, and is there a reset clause?
4. Are gaming taxes deducted before or as part of NGR? In markets with point-of-consumption tax, this materially reduces the affiliate base.
5. Are game content or platform fees deducted? These are contested deductions; confirm explicitly.
6. What chargeback policy applies? Are chargebacks deducted at the time of reversal or the original transaction period?
7. Can the operator change the NGR deduction methodology unilaterally? Require notice periods and grandfathering clauses.
8. Does the platform dashboard expose component-level NGR data or only the final figure?
9. What is the historical NGR-to-GGR ratio for the affiliate cohort you are joining? A ratio below 40% for a casino program warrants explanation.
10. Is NGR used consistently across all products, or are casino and sportsbook NGR calculated differently within the same program?

---

Key Takeaways

• NGR equals GGR minus bonuses, chargebacks, payment processing fees, and applicable taxes. It is the base figure for rev-share affiliate commission calculations and is not standardised by regulators outside of specific reporting requirements like the UK’s GGY.
• The deduction gap between GGR and NGR is typically larger for casino products than sportsbook, driven primarily by bonus costs. The affiliate payout difference from identical GGR can be 20% to 30% depending on product mix.
• Negative NGR carryover is one of the most commercially significant clauses in a rev-share agreement and must be clarified before signing, not after the first commission statement arrives.
• The UK Gambling Commission uses Gross Gambling Yield (GGY) for regulatory reporting, a close equivalent to GGR. It is distinct from NGR, and operators should confirm which metric their affiliate contracts reference.
• Platform-level transparency at the NGR component level, not just the final figure, is the standard that allows affiliates to audit their statements and reduces disputes.

---

Frequently Asked Questions

What is the difference between NGR and GGR in iGaming?

GGR is total player wagers minus winnings paid out, representing the raw house take before any costs. NGR is GGR after deducting bonuses, chargebacks, payment fees, and taxes. The gap between the two is how much it cost the operator to generate that GGR. Affiliate rev-share deals pay a percentage of NGR, not GGR, which is why commission statements often look lower than expected.

How do you calculate net gaming revenue?

The standard formula is: NGR = GGR minus bonus costs minus chargebacks minus payment processing fees minus applicable gaming taxes. The exact deductions depend on what the operator specifies in their affiliate program terms, since there is no universal regulatory formula for NGR. Always request the specific deduction list in writing before agreeing to an NGR-based deal.

Why is my affiliate commission based on NGR and not GGR?

Operators base rev-share commissions on NGR because it reflects revenue after the costs required to acquire and retain the players you referred. Paying commission on GGR would mean paying affiliates before accounting for bonus costs, fraud losses, and taxes, which would leave most programs uneconomic. The trade-off is that NGR-based deals are harder to audit without component-level reporting.

Can an operator change their NGR deductions after I sign an affiliate deal?

It depends on the contract terms. Some program agreements allow operators to modify deduction methodology with notice, while others lock the methodology for the contract term. Before signing, confirm whether the NGR definition is fixed, what notice period applies to any change, and whether a material change gives you the right to exit without penalty.

Do bonuses always get deducted from NGR before affiliate commission is calculated?

Almost universally, yes. Bonus costs are the largest and most consistently applied NGR deduction across the industry, covering welcome offers, free spins, reload bonuses, and loyalty rewards. The variables are how broadly bonuses are defined, whether there is a cap on the bonus deduction as a percentage of GGR, and whether bonus abuse or fraud-related bonus reversals are handled separately.

Is NGR calculated the same way for casino and sportsbook products?

No. Bonus cost ratios are typically higher in casino products, particularly for slots with welcome bonus offers, while sportsbook programs tend to show lower bonus deductions but may include sportsbook-specific costs like trading risk or free bet liabilities. If you are running traffic to a mixed operator, ask whether casino and sportsbook NGR are calculated using the same methodology or whether different deduction rules apply by product vertical.

What questions should I ask before agreeing to NGR-based rev-share?

The most critical questions are: what is the exact deduction list, is negative NGR carried over between months, are gaming taxes deducted as part of NGR, can the operator change the methodology unilaterally, and does the affiliate dashboard show component-level breakdown or only the final NGR figure. The NGR Audit Checklist in this article covers all ten points worth confirming before you sign.

---

Before finalising any NGR-based rev-share arrangement, run the checklist above against the actual contract language, not the marketing summary. If the program terms do not define the deduction methodology explicitly, that gap is worth resolving before your first commission cycle, not after. Read our methodology to understand how we evaluate affiliate program structures and reporting standards.