Free Spins in Slots Explained: How Bonus Rounds Work
Free spins are one of the most common bonus features found in online slots.
A free-spin round generally provides a specified number of spins within the game without requiring a separate stake for each individual spin in that feature.
However, the way free spins are triggered and the features available during them can vary significantly between slots.
What Are Free Spins in Slots?
Free spins are a bonus feature that awards additional game rounds after specified conditions are met.
The number of spins, reel configuration and additional features depend on the individual game.
Free spins can be part of the slot itself or, separately, offered as part of a casino promotion.
These are not necessarily the same thing.
How Are Free Spins Triggered?
A common trigger involves landing a specified number of Scatter or Bonus symbols.
For example, a game may require qualifying symbols to appear during the same spin before the feature begins.
Other slots can use different mechanisms, including:
- Bonus symbols
- Feature meters
- Random triggers
- Special reel combinations
- Pick-and-click features
The game's rules explain the exact trigger.
How Many Free Spins Do You Get?
There is no universal number.
A slot may award a fixed number of spins or vary the number according to the symbols or feature that triggered the round.
Some games also allow additional spins to be awarded during the feature.
What Is a Retrigger?
A retrigger occurs when the conditions for awarding additional free spins are met while the original free-spin feature is already active.
For example, qualifying Scatter symbols might award extra spins.
Retrigger rules vary between games, and some slots limit how many additional spins can be awarded.
Are Free Spins Actually Free?
When free spins are generated as an in-game feature, the individual feature spins generally do not require a new separate stake.
However, a qualifying paid spin may have been required to trigger the feature in the first place.
Promotional free spins offered by a casino are different.
Those promotions can include conditions such as:
- Eligible games
- Spin values
- Expiry periods
- Wagering requirements
- Maximum winnings
- Account eligibility
Always distinguish between an in-game free-spin feature and a casino free-spins promotion.
What Happens to the Stake During Free Spins?
The stake used for a free-spin feature is generally determined according to the game's rules and the wager that triggered the feature.
Players may not be able to change the stake while the bonus round is active.
Check the game's information for the exact rules.
Can Free Spins Include Multipliers?
Yes.
Some slots include multipliers during their free-spin rounds.
A multiplier can increase the value of qualifying wins according to the rules of the feature.
The multiplier might remain fixed, increase during the feature or change after certain events.
Not every free-spin round includes a multiplier.
Can Wilds Change During Free Spins?
Some games introduce enhanced Wild features during free spins.
These can include:
- Expanding Wilds
- Sticky Wilds
- Walking Wilds
- Stacked Wilds
- Multiplier Wilds
These features can operate differently from the Wild symbols available during the base game.
What Are Sticky Wilds?
Sticky Wilds remain in position for a specified period rather than disappearing immediately after one spin.
For example, a Wild might remain on its reel for the rest of a free-spin feature.
The exact behaviour depends on the game.
Can the Reel Layout Change?
Yes.
Some slots alter their reel structure during bonus rounds.
A feature might introduce:
- Additional rows
- More ways to win
- Different symbols
- Expanded reels
- Changing reel heights
- Additional Wilds
This can make the free-spin round operate differently from the base game.
What Is a Free-Spins Choice Feature?
Some games allow players to select between different versions of a free-spin bonus.
One option might provide more spins with one set of features, while another might offer fewer spins with different mechanics.
The available choices and their effects are specified by the game.
Do Free Spins Guarantee a Win?
No.
Receiving a free-spin feature does not guarantee that the feature will produce a particular return or any specific amount.
Outcomes remain determined according to the mechanics and mathematics of the game.
The number of free spins alone does not indicate what the feature will return.
Do More Free Spins Mean a Better Bonus Round?
Not necessarily.
The number of spins is only one part of the feature.
Other factors can include:
- Reel structure
- Symbol values
- Multipliers
- Wild mechanics
- Volatility
- Retriggers
- Paytable rules
A feature with more spins is not automatically more valuable than one with fewer spins.
Free-Spin Features vs Promotional Free Spins
It is important to separate two different uses of the term.
In-game free spins are features built into the slot itself.
Promotional free spins are offers provided by a casino and can have separate terms and conditions.
A casino promotion may specify which game the spins apply to, their value, when they expire and whether resulting winnings have additional conditions.
What Should You Check Before Playing?
Check the game's information for:
- How free spins are triggered
- How many spins are awarded
- Whether retriggers are possible
- Whether multipliers apply
- Special Wild features
- Reel changes during the feature
- How the stake is determined
- The game's paytable
- RTP information where available
- Complete feature rules
For promotional free spins, separately check the casino's promotional terms.
Final Thoughts
Free-spin rounds can range from relatively simple bonus features to complex sequences involving multipliers, Wilds, retriggers and changing reels.
There is no single set of rules that applies to every slot.
Understanding how a particular game's free-spin feature is triggered and what changes during the bonus round gives a clearer picture of how that slot actually works.