Free Spins are an in-game bonus sequence in which no additional ordinary wager is deducted for each awarded spin. Once the feature begins, the game applies a defined stake basis and a separate set of feature rules. Those rules—not the word “free”—determine the bonus’s payout distribution.
Two Free Spins bonuses with the same spin count can behave very differently. One may use ordinary reels with a fixed multiplier; another may add sticky Wilds, persistent grid multipliers, expanding symbols, special reels, retriggers, or a choice between several modes.
What Happens When Free Spins Begin?
The feature rules establish:
- the initial number of awarded spins;
- the wager or coin value used to calculate wins;
- the reel layout, pay system, and eligible symbols;
- the active Wilds, multipliers, collectors, meters, or persistent positions;
- the retrigger condition and any limit;
- the maximum payout or automatic termination rule;
- how the accumulated feature result is credited.
The detailed entry mechanism—scatters, random awards, meters, or another event—belongs on How Slot Bonus Rounds Are Triggered. This page begins after the feature has started.
The feature is part of a paid game’s mathematical model or a separately purchased mode. It can finish below the value of the triggering spin or purchase, including with no qualifying win unless the rules guarantee a minimum.
Common Free Spins Modifiers
Fixed win multiplier
Every qualifying win in the feature is multiplied by a stated value such as 2x or 3x.
Running multiplier
The multiplier increases or accumulates during the feature and remains active for later wins under the stated reset rules.
Per-spin or per-cascade multiplier
A value applies only to one spin or tumble sequence and then resets.
Sticky Wilds
Wild symbols remain in their positions for several or all remaining spins.
Expanding or walking Wilds
A Wild can cover a reel, move between spins, or modify adjacent positions.
Persistent grid positions
Multipliers, Wilds, values, or transformed cells remain active at specific locations.
Modified reels
The feature uses different symbol strips, removes low-value symbols, adds Wilds, or changes reel height.
Collectors and feature symbols
Special symbols collect values, activate modifiers, or upgrade later spins.
Running multipliers: a documented example
Pragmatic Play’s official Gates of Olympus page states that four or more scatters award 15 Free Spins and that multiplier symbols landing on winning spins are added to a total multiplier applied to that win.
Retriggers and special reels: documented examples
Gates of Olympus 1000 awards 15 Free Spins from four or more scatters. During the feature, three or more scatters add five spins. The official page also describes the running multiplier system. Gates of Olympus Xmas 1000 documents the same five-spin retrigger and states that special reels are active during Free Spins.
How Free Spins Retriggers Work
A retrigger adds spins or restarts part of the feature after the original bonus has begun. Common rules include:
Land the stated number of scatters during Free Spins to add a fixed or variable number of spins.
Collect a required number of symbols or values to extend the feature.
The game awards more spins through a random feature event.
A retrigger symbol can improve the multiplier, reel set, or mode rather than simply adding spins.
You begin with 10 spins. With four spins remaining, the retrigger adds five. The counter becomes nine if the game simply adds the award to the remaining count.
Check whether retriggers are unlimited, capped, available only once, or disabled in a purchased or enhanced mode. Do not infer the rule from another game by the same provider.
Feature Choice and Starting Conditions
Some bonuses let the player choose between several modes, often trading spin count against stronger modifiers:
| Choice style | Typical trade-off |
|---|---|
| More spins, weaker modifier | Longer feature with lower multiplier, fewer Wilds, or less persistence |
| Fewer spins, stronger modifier | Shorter feature with enhanced multiplier or symbol behavior |
| Guaranteed starting symbol | Feature begins with a Wild, collector, multiplier, or persistent position |
| Random mode selection | The game chooses the starting conditions rather than the player |
A choice does not necessarily change RTP. It can redistribute the same theoretical return into a different volatility profile. Check mode-specific figures where published.
Which Bet Applies During Free Spins?
In an in-game feature, the triggering wager normally establishes the payout basis for the bonus. The rules may express the basis as:
- total bet;
- line bet;
- coin value multiplied by active coins or lines;
- the stake selected before a Feature Buy;
- a fixed promotional stake chosen by the casino.
The feature usually does not allow an ordinary stake change while it is active. A new feature entered at another stake is a separate game event.
Free Spins, Respins and Cascades Are Different
| Mechanic | What normally happens |
|---|---|
| Free Spins | A sequence of complete spins occurs without an additional ordinary wager for each awarded spin. |
| Respins | Some reels or positions spin again while selected symbols may remain locked. |
| Cascades or tumbles | Winning symbols are removed and replaced within the same spin or bonus spin. |
A Free Spins feature can contain respins and cascades, but the terms should not be used as synonyms.
Do Free Spins Have Their Own RTP?
The ordinary headline RTP commonly describes the complete game model, including the probability of entering Free Spins and the payouts generated inside the feature. It is not the expected return of one individual bonus round.
Additional figures may be published for:
- Bonus Buy;
- Ante or enhanced-chance mode;
- Super Free Spins;
- different feature choices;
- different approved casino configurations.
A purchased mode can have a separate RTP. Check the selected option rather than assuming the base-game percentage applies. See What Is Bonus Buy? for that cluster.
Can Free Spins Pay Zero?
Yes. A sequence can end without a qualifying payout unless the rules guarantee a minimum win or starting value. The number of awarded spins, animation, or presence of modifiers does not guarantee that the feature will return more than the triggering stake or purchase price.
Ten spins on enhanced reels can have a different distribution from twenty spins on ordinary reels. Compare the complete feature rules, not the counter alone.
How to Evaluate a Free Spins Feature
In-Game Free Spins vs Casino Promotional Spins
The same phrase describes two different products:
In-game Free Spins
A feature defined by the slot’s rules and mathematical model.
Promotional Free Spins
A casino reward that can use a fixed stake, selected game, expiry, wagering requirement, or maximum convertible win.
Promotional conditions belong to the casino terms, not to the slot paytable. This page does not rank promotional offers or calculate their value.
Use SlotRandomizer to find games with Free Spins and bonus mechanics, then compare the exact multipliers, Wilds, retriggers, and RTP in the paytable.
Find a bonus slot →Frequently Asked Questions
The Bottom Line
Free Spins are a rule-defined bonus sequence, not a guaranteed reward. Evaluate the stake basis, reel changes, persistent modifiers, retriggers, feature choices, RTP, and payout cap. The number of spins alone says little about the feature’s value or risk.
