What counts as a game bonus
A game bonus is any offer tied to a specific game or type of game rather than to your balance as a whole. Free spins on a named slot are the most common, but the category also covers slot tournaments and races, bonus-buy credits, rakeback boosts on house games, and free plays on crash or dice titles. The offers in the listing above are compared on what you actually receive per spin or per round, not on the headline count.
The general rules for match bonuses are covered on our bonuses page and in the casino bonuses explained guide. This page focuses on the parts that are specific to spins and game offers.
Valuing free spins
A free spin is a bet placed for you at a fixed stake. Its value depends on three numbers: the number of spins, the stake per spin and the RTP of the slot. Multiply the first two to get the face value, then apply the RTP to get the expected return before any wagering.
50 spins at 0.10 each have a face value of 5. On a slot with 96% RTP, the expected return is 5 × 0.96 = 4.80. If winnings must then be wagered 10 times, you stake 48, which at a 4% edge costs about 1.92 on average. The expected value of the offer is about 4.80 − 1.92 = 2.88. With no wagering, the full 4.80 is yours on average.
| Offer | Face value | Expected value |
|---|---|---|
| 100 spins at 0.10, winnings wagered 35x | 10.00 | close to zero: wagering 35 × 9.60 = 336 has an expected cost of about 13.44, more than the 9.60 expected winnings, so most players lose the balance before clearing it |
| 50 spins at 0.10, winnings wagered 10x | 5.00 | about 2.88 |
| 20 spins at 0.50, no wagering | 10.00 | about 9.60 |
The pattern is clear: fewer spins at a higher stake with no wagering often beat a large spin count with heavy wagering. Spin count is the least useful number on the card.
RTP and eligible games
Free spins are almost always locked to one slot or a short list. That choice matters more than many players realise.
- RTP settings. Many popular slots are released with several RTP versions, and the operator chooses which one to run. The same game can return 96% at one casino and a few points less at another. Check the game’s information screen, as explained in our guide to RTP.
- Volatility. High-volatility slots pay rarely but heavily. With a small batch of spins, most players win little or nothing, and a few win large amounts that may then hit a cap.
- Excluded games. Terms often exclude jackpot slots, bonus-buy features and some table games from wagering, or count them at a reduced rate.
- Provably fair originals. Crypto casinos sometimes give free plays on their own dice, crash or plinko games. These can be verified with the steps in our provably fair guide, and their house edge is usually published.
The UK rules for spins in 2026
The UK Gambling Commission’s rules from 19 January 2026 cover free spins as well as bonus money. Wagering on any incentive is capped at 10 times, and a promotion cannot require you to use two products, so a free bet that unlocks casino spins is no longer allowed. Many British operators have responded by offering spins with no wagering at all. LeoVegas and bet365 are examples where our reviews describe no-wagering spin offers in Britain; check the current terms in your account. The Great Britain page has the full picture.
Outside Britain, spins on offshore crypto casinos can still carry 30x or more wagering on winnings, and some packages spread spins over several days, with each batch expiring quickly.
Tournaments, races and drops
Slot tournaments, wager races and prize drops reward volume rather than individual deposits. A race pays out by leaderboard position based on how much you stake in a period. A drop pays random prizes during play on selected games.
These are not free money. To finish high in a wager race you usually need to stake far more than most players would otherwise. The expected loss on that extra play is often larger than the prize. Treat them as a small bonus on play you would do anyway, never as a reason to stake more. Rainbet, for example, runs daily and monthly races in which sports bets count extra, while Solpump uses scheduled airdrops instead.
No-deposit spins and bonus buys
No-deposit spins are the smallest game offers and the most heavily restricted. They usually come in batches of 10 to 50 at the minimum stake, with a low cap on what you can withdraw and a requirement to deposit before cashing out. Their realistic value is a few units of currency at most, and their main use is to try a casino’s interface before deciding whether to deposit. Our no-deposit bonus guide works through typical terms.
Bonus-buy features let you pay a fixed multiple of your stake to go straight to a slot’s bonus round. Some casinos run promotions that refund part of a bonus buy or count it towards races. Two points matter. First, many bonus terms exclude bonus buys from wagering, or ban them while a bonus is active, and using one can void the bonus. Second, the RTP of the bonus-buy feature is sometimes different from the base game; the game’s information screen should state it.
A bonus buy at 100 times a 0.20 stake costs 20. If the feature’s RTP is 96%, the expected return is 19.20, an expected loss of 0.80 per buy, with a wide spread: many buys return well under 20 and a few return far more. Value any refund promotion against that 0.80, after its own caps and wagering.
Game-bonus red flags
- Spin stake not stated, or set at the lowest possible bet.
- A low cap on winnings from spins, such as 20 or 50, regardless of what you win.
- Spins credited to a slot running a reduced RTP setting.
- Spins that expire within a day of being credited.
- Wagering on winnings above 35x, which makes the offer close to worthless on average.
- Spins that must be activated in a separate menu, where they are easy to miss before they expire.
If you cannot work out the stake per spin and the wagering on winnings from the terms, you cannot value the offer. Ask support, and if the answer is vague, skip it.
Choosing a game bonus
- Confirm the casino is listed for your country on our coverage page.
- Work out the face value: spins × stake.
- Apply the slot’s RTP to get the expected return.
- Subtract the expected cost of any wagering on winnings.
- Check the winnings cap, expiry and excluded games.
- Compare the result with simpler alternatives, such as the rakeback described in our rakeback guide.
Game bonuses are a small extra on entertainment you have already budgeted for. If you notice yourself chasing spins or races, use the limits described in our responsible gambling guide, and see our crypto casino rankings or casino rankings for operators whose terms we have checked.