Mermaid Win & Spin Slot – 94.5% RTP & 1,000x Max Win

Mermaid Win & Spin

RTP

94.5%

Max win

1,000x

A 5x3, 20-line mermaid slot with expanding wilds. Free spins merge reels 2-4 into a Mega Reel, and the Win & Spin bonus offers four prize pots.

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Quick answer

Mermaid Win & Spin is a Inspired Entertainment slot (2025) with 94.5% RTP and a 1,000x max win. It uses 20 paylines with free spins, expanding wilds and hold and win. RTP can vary by casino.

Key specs

RTP: 94.5%
Max win: 1,000x
Grid: 5×3
Pays: 20 paylines
Released: 24 April 2025
Bet range: $0.20–$100
Jackpot: Fixed

Not published by the provider: volatility

Top-rated casinos (check the game is available)

We haven't confirmed which partner carries this game.

Aurivo Casino100% up to $1,000 + 200 Free Spins30x bonus
Get 200 spins + 100% at Aurivo Casino (opens in new tab)
18+. New customers. Min dep $20. 30x bonus wagering. Max bet $5. 30 days. 200 spins on Book of Dead at $0.20. Credited in daily batches of 20 over 10 days. Full T&Cs apply.
Key terms
18+. New customers only. Min deposit $20. 30x bonus wagering requirement. Max bet $5 while wagering. Free spins on Book of Dead at $0.20 per spin. Spins credited in daily batches of 20 over 10 days. Offer valid 30 days. Full T&Cs apply. Please gamble responsibly.
Velmora150 No-Wager Free Spins Keep every winNo wagering
Claim 150 no-wager spins at Velmora (opens in new tab)
18+. New customers. Min dep $20. No wagering. 7 days. 150 spins on Big Bass Bonanza at $0.10. Full T&Cs apply.
Key terms
18+. New customers only. Min deposit $20. No wagering on winnings. Free spins on Big Bass Bonanza at $0.10 per spin. Offer valid 7 days. Full T&Cs apply. Please gamble responsibly.
Kronos Royale200% up to $2,000 + 10% weekly cashback40x bonus
Get 200% bonus at Kronos Royale (opens in new tab)
18+. New customers. Min dep $50. 40x bonus wagering. Max bet $10. 60 days. Full T&Cs apply.
Key terms
18+. New customers only. Min deposit $50. 40x bonus wagering requirement. Max bet $10 while wagering. Cashback: 10% of net casino losses each week (Monday to Sunday), paid as cash with no wagering every Monday, up to $500 a week. Offer valid 60 days. Full T&Cs apply. Please gamble responsibly.

Game availability varies by casino and country.

What does an hour cost?

Themes:

Fishing & ocean Fantasy & magic

Part of the Win & Spin series.

Member access — full guide unlocked

How to play Mermaid Win & Spin (members only)

Wins are paid when matching symbols land on an active payline, usually left to right starting from the leftmost reel. Your total stake is spread across the lines, and each line win is the line bet multiplied by the symbol's paytable value.

Mermaid Win & Spin is played on a 5×3 grid with 20 paylines.

Set your stake. Choose your total bet per spin between $0.20 and $100. Wins are paid as multiples of this stake.
Check the paytable. Open the game's info screen to see what each symbol pays and the exact rules for this version.
Spin. Each spin's result is decided by a certified random number generator, independent of previous spins.
Trigger the bonus. Land the required scatter symbols to start the free spins feature.

The full Mermaid Win & Spin guide: how winnings work, 4 features and 3 strategy tips

What 94.5% RTP costs per $100 wagered: $5.50 on average
4 features explained: free spins, expanding wilds, hold and win, fixed jackpots
2 RTP versions compared: 94.5%, 92%
Strategy tips for Mermaid Win & Spin

Free · no card · 18+ only

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How winnings work (members only)

What 94.5% RTP costs per $100 wagered, the 1,000x max win at a $1 stake

The top prize is capped at 1,000x your stake. On a $1 spin that is $1,000; on $0.20 it is $200. When the cap is reached the round usually ends immediately.

What 94.5% RTP means

Expected return = stake × 94.5%
Over $100 of total bets, the long-run average loss is $5.50

RTP is a long-run average across millions of spins. Any single session can finish far above or below it, especially on a volatile game.

Features explained (members only)

4 features explained: free spins, expanding wilds, hold and win, fixed jackpots

Free spins

A bonus round of spins played at no cost to your balance, usually triggered by landing three or more scatter symbols. Wins during the round are added to your balance, and many games let you retrigger extra spins.

Expanding wilds

When an expanding wild lands, it grows to cover its whole reel, turning one symbol into a full column of wilds.

Hold and win

Landing enough special cash or coin symbols starts a respin feature: those symbols lock in place, the respin counter resets each time a new one lands, and their values are collected when the feature ends.

Fixed jackpots

Jackpot prizes set at fixed multiples of your stake, such as Mini, Minor, Major and Grand.

Strategy tips (members only)

Check which RTP version you're playing. Inspired Entertainment offers this game at 94.5%, 92%. Open the game rules at your casino and prefer sites running the 94.5% version.

2 more tips

Bonus wagering: at 94.5% RTP, clearing $1,000 of wagering costs about $55.00 on average. Check the bonus terms, as some casinos exclude specific games. Run your numbers in the wagering calculator.
Set limits before you spin. Decide your loss limit and session time in advance and stop when you reach either. No pattern or betting system changes the outcome of a spin.

More on this in slot RTP and volatility explained and bankroll management.

RTP versions (members only)

2 RTP versions compared: 94.5%, 92%

Inspired Entertainment supplies Mermaid Win & Spin in 2 RTP versions and each casino chooses which one to run. Over $1,000 of bets, the 92% version costs about $25 more on average than the 94.5% version.

RTP versions of Mermaid Win & Spin
Version	Average cost per $100 wagered	Extra vs best
94.5% (best)	$5.50	—
92%	$8.00	+$2.50

Open the game's rules or info screen at your casino to see which version it runs.

Seen a different version at a casino? How member RTP reports work

Questions

Frequently asked questions

Who makes Mermaid Win & Spin?

Mermaid Win & Spin is developed by Inspired Entertainment and was released in 2025.

What is the RTP of Mermaid Win & Spin?

The default RTP of Mermaid Win & Spin is 94.5%. Inspired Entertainment also supplies versions at 92%, so check the game's info screen at your casino.

What is the max win on Mermaid Win & Spin?

The maximum win on Mermaid Win & Spin is 1,000x your stake, which is $1,000 on a $1 spin.

Can I play Mermaid Win & Spin for free?

Not on GambGenius at the moment: we don't list an official Inspired Entertainment demo of Mermaid Win & Spin.

Does Mermaid Win & Spin have a bonus buy?

No bonus buy is listed for Mermaid Win & Spin in the sources we checked.

Where this data comes from

inseinc.com Provider
slotcatalog.com Slot database

Specs come from the provider's own site and 1 independent slot database. Casinos can run lower-RTP versions, so always check the game rules before you play.