Bitcoin casino free spins

Free spin offers compared

Coins.Game (MAXBONUS): up to 100 free spins on Lucky Tiger 1000 (Pragmatic Play) or Arrow Slot (BGaming), no wagering on winnings, $5 minimum deposit.

Rainbet (BOOST20): 60 free spins as part of a welcome package worth up to $2,100, plus a 20% rakeback boost for 72 hours. The package carries 40× wagering on some parts.

What free spins are worth

A free spin's expected value is its bet size times the slot's RTP. 100 spins at $0.20 on a 96% RTP slot are worth about $19.20 on average, before wagering. With no wagering, that's close to what you keep; with 40×, much less.

Try the slot machine simulator to see how volatile a run of 100 spins really is.

Free spin value: the maths

The expected value of a batch of spins is number of spins × bet per spin × RTP. The casino sets the bet per spin, so check it in your bonus tab before you work out what the offer is worth. These examples use a 96% RTP slot.

The expected winnings are an average. Most batches land below it and a few land far above it, because slot wins are lumpy.

Wagering on spin winnings

Wagering is where most free spin offers lose their value. Say 100 spins return $10. With no wagering, as with Coins.Game's MAXBONUS spins, that $10 is yours to play or withdraw under the casino's normal rules.

With 40× wagering you must bet $400 before the $10 is released. On a 96% slot the expected loss over $400 is $16, more than the $10 you started with. On average the balance is gone before you finish. That is why no wagering on winnings is worth more than a larger number of spins with heavy rollover.

Rainbet's package lists 40× or none depending on the part, so check which applies to your spins in the bonus terms.

How swingy 100 spins really are

Volatility decides how far a short run strays from the average. On our slot machine simulator, one spin has a standard deviation of 5.86 bets. Over 100 spins at $0.20 that is about $11.70 either side of the $19.20 average, and many modern slots swing much harder.

So do not judge an offer by one batch. A zero result and a result several times the average are both ordinary outcomes for 100 spins.

Claiming and using free spins

Enter the code at signup, make the qualifying deposit and open the bonus or rewards section to see how many spins you received and on which game. At Coins.Game the spins are on Lucky Tiger 1000 or Arrow Slot. Check the expiry date in the terms and use the spins before it passes.

If you mostly play slots, rakeback can add more over time than one batch of spins. Coins.Game also pays 10–30% of the edge by VIP level. On $1,000 of slot turnover at about 4% edge, that is $4 to $12 back.

Why the slot version matters

Many slots come in several RTP versions, and the casino chooses which one it runs. A 2-point RTP gap on a $20 batch of spins is only 40 cents, but the same gap applies to everything you play afterwards. Open the game's info screen at the casino and read the RTP it shows, rather than relying on a figure from a review.

Volatility matters as well. Coins.Game's spins run on Lucky Tiger 1000 from Pragmatic Play or Arrow Slot from BGaming, and each studio publishes a maximum win and often a volatility rating in the game's help pages. A slot with a large top prize tends to pay it rarely, so most batches of spins on it return less than the average.

What to check in any free spin offer

Whether the spins come from one of the casinos we list or somewhere else, the same terms decide their value.

• The value of each spin, which sets the total stake.
• Which slots the spins can be used on.
• Wagering on winnings, and whether it applies to the winnings alone or more.
• A cap on what spin winnings can pay out.
• How long you have to use the spins and to finish any wagering.
• The deposit needed to trigger them, such as Coins.Game's $5 minimum.

Tools for checking an offer: wagering calculator · rakeback calculator · slot simulator.