Game contribution & RTP explained (with real examples)

Last updated: 2026-07-12 · Gamblerfy editorial team

These two terms almost always show up together in bonus terms, but they answer different questions — and mixing them up is one of the easiest ways to misjudge how good a bonus really is.

RTP: what a game pays back, on average

Return to Player (RTP) is the long-run average percentage of wagered money a game returns to players. A slot with 96% RTP returns, on average, $96 for every $100 wagered over a very large number of spins — the other $4 is the house edge. It says nothing about what happens in any single session; it's a statistical average over huge volume.

Game contribution: how much of your stake "counts"

Game contribution is separate: it's the percentage of each bet that counts toward clearing a bonus's wagering requirement.

• Slots: usually 100% contribution — every $1 wagered reduces the requirement by $1.
• Video poker: often around 50% — you need to wager roughly double to get the same playthrough credit.
• Blackjack: commonly 10-25%, sometimes 0% (excluded entirely).
• Roulette / baccarat: frequently 10-25% or excluded.

Why the pattern is never a coincidence

Video poker and blackjack usually have higher RTP (lower house edge) than slots — often 99%+ compared to a slot's typical 92-97%. If those games contributed 100% toward wagering, players could clear a bonus with very little expected cost to the operator. So operators reduce the contribution on high-RTP games to protect their margin. The pattern is: the better the game's RTP, the lower its contribution tends to be.

Worked example

Say you have a $100 bonus with a 20x wagering requirement — you need to wager $2,000 in total credit.

• Playing a 100%-contribution slot: you need to actually stake $2,000.
• Playing a 50%-contribution video poker game: you need to actually stake $4,000 to get the same $2,000 of credit — double the money at risk, even though the headline "20x" didn't change.
• Playing a 10%-contribution blackjack game: you'd need to stake $20,000 — usually unrealistic, which is exactly why it's discouraged this way instead of being banned outright.

This is also why a game's RTP alone doesn't tell you whether it's a smart choice for clearing a specific bonus — you have to weigh RTP against contribution together. RTP also doesn't capture volatility — two slots with the same RTP can have very different odds of surviving a wagering requirement.

Bringing it together

To judge a bonus properly you need three numbers at once: the wagering requirement, the game contribution of what you actually plan to play, and any max cashout cap on the winnings. Our Bonus Value Calculator combines all three (plus expiry) into a single 0-100 score — see the exact formula on how we rate.