Big Bass Slots UK: Every Big Bass Title Ranked by RTP and Maximum Win, and Where to Play (October 2026)

Quick answer: the best Big Bass slots and where to play them

• For the lowest cost, pick from the top of our title ranking. Big Bass Splash, Bigger Bass Bonanza, Big Bass Bonanza and Christmas Big Bass Bonanza all publish 96.71%, an average cost of £3.29 per 1,000 spins at 10p. Big Bass Splash comes first because its 5,000x is the highest ceiling at that price.
• For the largest top prize, take a 1000 edition. Big Bass Splash 1000 publishes 25,000x and Big Bass Bonanza 1000 publishes 20,000x, worth £50,000 and £40,000 at the £2 limit, at an RTP 0.19 to 0.20 of a point below the early titles.
• Pay the 96.07% premium only for a feature you want. The five middle-generation titles cost £3.93 per 1,000 spins at 10p, about 19% more a spin than the leaders, in return for extras such as Hold & Spinner’s coin bonus or the sticky multipliers of Floats My Boat.
• Find the game, then its version, at the casino you pick. The ranking above holds deposit packages from four offshore-licensed casinos and promises no particular title. Open the information screen before staking: Big Bass Bonanza’s 94.6% version costs £5.40 per 1,000 spins at 10p, more than any default in the series.
• Price the wagering before you take the welcome package. Those packages carry 35x to 40x. At 40x, each £10 of bonus means £400 of stakes, about £13.16 of average cost on a 96.71% title and £15.72 on a 96.07% one.
• Know what an offshore licence leaves out. At the ranked casinos none of the British controls described here applies: no £5 or £2 stake limit, no 2.5-second spin, no block on bonus buys, no GamStop and no 10x wagering cap.

The Big Bass games are a series of fishing-themed slots from Pragmatic Play, a provider headquartered in Gibraltar whose games are certified or licensed in more than 30 jurisdictions. The series started with Big Bass Bonanza in December 2020 and has added titles every year since: larger grids, Megaways versions, a hold-and-spin version, and from 2025 the “1000” editions with money symbols worth up to 1,000 times the stake. Pragmatic called the August 2023 release, Big Bass Hold & Spinner Megaways, the “landmark tenth release”, and at least five more have followed.

Three facts decide what a Big Bass game costs and pays. The first is the published RTP, which has moved in three steps: 96.71% for the early titles, 96.07% for five games released from October 2022 to March 2024, and 96.51% to 96.53% for the 1000 editions. The second is the version the casino runs, because Big Bass Bonanza is also supplied at about 95.67% and about 94.6%, and the information screen in the game is the only place that shows which one you have. The third is the ceiling: 2,100 times the stake on Big Bass Bonanza, rising to 25,000 times on Big Bass Splash 1000. A higher ceiling at a similar RTP usually means that more of the game’s return is concentrated in rare outcomes and less in ordinary spins.

In Great Britain the games carry the same controls as every online slot: identity checks before any play, demo included; at least 2.5 seconds a spin with no autoplay or turbo; a stake limit of £5, or £2 for players aged 18 to 24; and no option to buy the bonus round, which Pragmatic’s own release announcements mention only “in select markets”. The free-spins round has to be won in normal play.

Popularity claims need a source, and for this series the source is Entain. When it agreed in November 2025 to bring the series into more than 2,700 Ladbrokes and Coral shops, Entain said all the titles consistently rank in its top 20 games for those two brands and that Big Bass Splash was its top-performing online slot in the UK in 2025. That describes one operator’s customers. It says nothing about which title returns the most, which is a question for the tables below.

What to compare on each Big Bass title

Fourteen games share one fisherman, and the differences that cost or pay money sit where a lobby tile does not show them. Run through these lines for the title you mean to play, at the casino where you mean to play it.

The first three rows set the price of play and the last four the terms around it. Once the title and the version are settled, the stake is the lever left: on Model C a £20 balance at 10p lasted a median of 926 spins, and at £1 just 41.

Every Big Bass title ranked by RTP and maximum win

The table ranks the fourteen Big Bass titles for which this guide has figures verified on Pragmatic Play’s own pages and release announcements. Titles are ordered first by RTP group, because that sets what every spin costs, and within a group by published maximum win, because the RTPs inside a group differ by no more than 0.02 of a point, or 2p per 1,000 spins at 10p. Titles without a published ceiling follow those with one, the higher RTP first, and identical figures share a rank. The ceiling rank orders the eight published maximums on their own. Months are those of the provider’s announcement, and “Not published” means the figure does not appear in those sources.

Read the ranking as a price list first. Places 1 to 5 cost £3.29 or £3.30 per 1,000 spins at 10p on average, places 6 to 8 cost £3.47 to £3.49, and the five 96.07% titles cost £3.93; at £1 a spin those become £32.90 or £33.00, £34.70 to £34.90, and £39.30. Within each group the ceiling sets the order, and it is the column to weigh against session length: Model C, built to Big Bass Bonanza’s 2,100x, places that top prize about once in 90,000 spins, and nothing comparable is published for the 25,000x of Big Bass Splash 1000.

Three things about the table are worth knowing before you use it. It is not the complete series. Pragmatic described Hold & Spinner Megaways as the tenth release, yet only eight titles announced before it are in the table, so at least one earlier game is missing; titles whose figures could not be verified are left out rather than filled in from memory.

Second, only Big Bass Bonanza has published lower-RTP versions in these sources. For every other title the table gives the one figure Pragmatic publishes, which is the default. Whether a casino runs a lower setting of, say, Big Bass Splash can only be seen in that game’s information screen, so the cost tables further down describe the default versions unless a row says otherwise.

Third, volatility is published for only two titles: Big Bass Bonanza is rated medium-high and Big Bass Bonanza Megaways is described as high volatility. For the rest there is no provider label to quote, and this page does not invent one.

Big Bass features explained: what each title adds

Pragmatic’s descriptions of the series reuse a small set of features, and knowing them makes the table easier to read. What follows names only the features the provider describes; it says nothing about how often any of them happens, because that is not published for any title.

Money symbols, scatters and the retrigger ladder

In Big Bass Bonanza, money symbols carry values of up to 2,000 times the stake, and three, four or five scatters start 10, 15 or 20 free spins. During the free spins, every fourth wild retriggers the round: the first retrigger comes with a 2x multiplier, the second with 3x and the third with 10x. The 1000 editions are described by their money symbols: from 2x to 1,000x on Big Bass Bonanza 1000, and up to 1,000x on Big Bass Splash 1000 and Big Bass Vegas 1000. Vegas 1000 also gives more free spins per trigger: 15, 20 or 25 for three, four or five scatters, half as many again as the original at three scatters and a quarter more at five.

Grids, ways and modifiers

Bigger Bass Bonanza adds a fourth row to the five reels, and its Goldfish scatter pays 4,000x in the free spins, the same figure as the game’s published maximum. The Megaways titles swap fixed lines for a changing number of ways to win: Big Bass Bonanza Megaways, described as high volatility, with money symbols up to 4,000x, and Big Bass Hold & Spinner Megaways, with up to 147,456 ways. Big Bass Splash keeps a 5×3 grid and 10 paylines but can add up to five random modifiers before its free spins start. Big Bass Keeping it Reel adds golden wilds, Big Bass Floats My Boat sticky multipliers of up to 50x, and Big Bass Amazon Xtreme fish money up to 1,000x with a random multiplier up to 40x. Big Bass Hold & Spinner puts a hold-and-spin coin bonus alongside the usual free spins.

What the features change for your session

Most of these features add ways for an occasional spin to pay a lot. None of them changes the RTP, which is fixed for each version of a game; they decide how that RTP is divided between frequent small payouts and infrequent large ones. Pragmatic publishes neither the hit rate nor the bonus frequency of any Big Bass title, so the only way to see the shape of results is a model. The simulations further down use Model C, built to match Big Bass Bonanza’s published RTP, medium-high volatility class and 2,100x ceiling. The later titles, with ceilings of 10,000x to 25,000x, would need different models and none is offered here; their RTPs, though, can be priced exactly, and the next sections do that.

One feature is missing in Great Britain. Pragmatic’s release announcements mention a bonus-buy option “in select markets”, but paying to go straight to the free spins is not offered to British players, following the Gambling Commission’s January 2020 warning to operators. On a licensed British site, every free-spins round in the series is triggered by scatters landing in normal play.

How popular is Big Bass? The Entain deal read closely

On 25 November 2025 Entain agreed to bring the Big Bass series, naming Big Bass Bonanza, Big Bass Splash and Big Bass Hold & Spinner among others, to more than 2,700 Ladbrokes and Coral shops. It was the first time the series had gone into a major operator’s retail estate. The announcement also carried two statements about the games online: Entain said all the titles consistently rank in its top 20 games for Ladbrokes and Coral, and that Big Bass Splash was its top-performing online slot in the UK in 2025.

That is more than any other operator has put on record about the series in the sources used here, and it is worth reading precisely.

• It covers two brands, not the market. The rankings are Entain’s, for Ladbrokes and Coral customers, and they are not a ranking of the wider market.
• “Top-performing” is Entain’s measure. The statement does not say what was measured, and it is not a statement about return: Big Bass Splash publishes 96.71%, the same as Big Bass Bonanza.
• The shops are a separate matter. The stake limits and the 2.5-second rule described on this page apply to online slots, which the Commission describes as reel-based casino games played online. Nothing in this page’s figures describes the versions in shops.
• It says nothing about versions. Entain’s statement does not say which RTP version Ladbrokes or Coral run online. As on any site, the game’s information screen shows it.

For a player, the useful reading is simple: a large British operator reports that the series ranks among its leading games. Whether a given title is good value is a separate question, answered by its RTP and the version in front of you.

The cheapest Big Bass titles: what 96.71% against 96.07% saves you

Read the RTP column of the ranked table against the announcement dates and a pattern appears. The four titles from December 2020 to June 2022 publish 96.71%, with the Megaways version at 96.70%. Five of the six from October 2022 to March 2024 publish 96.07%. The three 1000 editions from April 2025 to September 2026 publish 96.51%, 96.52% and 96.53%. The published figures do not explain the change, but they do allow an exact price for it.

The house edge is 100% minus the RTP: 3.29% at 96.71% and 3.93% at 96.07%. The average cost of play is the stake times the number of spins times that edge, so the two groups differ by 0.64% of everything staked. Put another way, a spin on one of the 96.07% titles costs about 19% more on average than the same spin on one of the early ones.

What picking a 96.71% title saves at each stake

At 10p the drift is small change: 38p over an hour at an assumed 600 spins. At the £5 limit it is £19.20 over the same hour, and £46.08 at the fastest pace the rules allow. The 1000 editions sit between the two groups, about 6% dearer per spin than the early titles and about 11% cheaper than the 96.07% ones.

The larger lesson is in the last two rows of the first table. Big Bass Bonanza’s 94.6% version costs £5.40 per 1,000 spins at 10p, £2.11 more than its default and more than three times the 64p that separates the two RTP groups. Switching version within one game moves the price further than switching between titles. For the titles whose lower versions are not published in these sources, the published default is the figure to look for, and the information screen tells you whether you have it. The page on new online slots sets the same drift against other recent releases.

The biggest Big Bass wins in pounds at 10p, £2 and £5

A maximum win is quoted as a multiple of the stake, so its value in pounds depends on what you bet. The table converts the eight published ceilings at 10p (the usual value of a free spin), at £1, at £2 (the limit for players aged 18 to 24) and at £5 (the limit from the age of 25).

Six titles have no published maximum in these sources. For some of them Pragmatic gives the size of a single feature instead: money symbols up to 4,000x on Big Bass Bonanza Megaways and up to 1,000x on Big Bass Vegas 1000, fish money up to 1,000x and a random multiplier up to 40x on Big Bass Amazon Xtreme, and sticky multipliers up to 50x on Big Bass Floats My Boat. Those describe part of a result, not the ceiling of the game, so they are not converted here.

In five years the series’ published ceiling rose almost twelvefold, from 2,100x on Big Bass Bonanza to 25,000x on Big Bass Splash 1000, while the published RTP ended slightly lower (96.71% on Big Bass Splash, 96.52% on Splash 1000). A higher ceiling does not raise the RTP, which is fixed for each version; if rare top results take a larger share of a fixed return, ordinary spins get a smaller one. The provider-wide comparison of originals and 1000 editions is on the Pragmatic slots page.

How rare is a ceiling? No provider figure says. Model C, which has to put a number on Big Bass Bonanza’s 2,100x, places it about once in 90,000 spins. At an assumed 600 spins an hour that is about 150 hours of play for each maximum on average, and about 62 hours at the 1,440-spin legal maximum. That is a property of the model, not of the game, and nothing comparable can be said about the titles with ceilings of 10,000x to 25,000x.

The stake limits cap what you can bet, not the multiple. A player aged 18 to 24 can still land 25,000x on Big Bass Splash 1000, which at the £2 limit is £50,000. What the limits change is the cost of chasing it: at £2 a spin on a 96.52% game, an assumed 600 spins an hour cost £41.76 on average, and at £5 a spin £104.40.

What 100, 300 and 1,000 spins really return on the Big Bass model

Big Bass Bonanza’s real outcome table is not public, so the simulations here run on Model C, a model slot built to match the game’s published RTP (96.71%, with versions at 95.67% and 94.6%), its medium-high volatility class and its 2,100x maximum. In the model, some win lands on 23.9% of spins and the bonus round arrives about once in 180 spins; the lower versions keep the bonus round unchanged and trim the base game. Each spin count was run 400,000 times (150,000 for 1,000 spins, 200,000 for 300 spins) at 10p a spin, with enough money to finish every spin, so “returned” means what the spins paid back against what they cost.

Over 100 spins the version barely registers: 20p on the average, 22p on the median and 1.7 points on the chance of finishing level or ahead. A session that short is decided by whether the bonus round turns up, which it does in 42.7% of sessions on every version because the round itself is identical, and by what it pays when it does. Over 1,000 spins the version shows. The average falls by £2.17 and the median by £2.35 from the default to the 94.6% version, and the chance of finishing level or ahead drops from 29.9% to 27.3%, a gap of roughly one session in 40.

Short, medium and long sessions on the default version

The average cost grows in step with the spins: 33p, 99p, £3.29. The typical session tells a different story. Its shortfall is £2.82 over 100 spins, which is 28% of the stake and more than eight times the average cost, because 57% of 100-spin sessions never see the bonus round and live on base-game wins alone. As sessions lengthen, more of them catch at least one round, and the typical shortfall shrinks as a share of the stake, to 14% over 1,000 spins; it approaches the 3.29% house edge only over far longer play.

The 300-spin column, about a 12-minute session at the fastest legal pace, fills the gap between the other two. Seven sessions in ten returned £20 or more of the £30 staked, 7.2% returned £50 or more and 2.4% £100 or more, while one in ten returned less than £16.32. The best results do not grow in step with the session: the 1-in-100 result rises from £83.95 over 100 spins to only £110.15 over 300, although three times as much is staked.

How long £20 lasts on Big Bass at four stakes

Fixed spin counts assume the money never runs out. A real session starts with a balance and ends when it is gone or when you stop. To show how the stake shapes that, Model C at its default 96.71% was given £20 and played at a fixed stake of 10p, 20p, 50p or £1 until the balance could not cover another spin or 1,440 spins had been played, which is one hour at the 2.5-second minimum. Each stake ran 40,000 sessions.

The stake decides how fast the £20 goes far more than how much of it goes. The median session lasted 926 spins at 10p and 41 at £1: about 39 minutes against under two at the fastest legal pace, or about an hour and a half against four minutes at an assumed 600 spins an hour. Yet the average balance at the end of the run was within about £1.30 at every stake, from £15.41 at £1 to £16.68 at 50p. A session that runs out stops paying the house edge, so a bigger stake buys a shorter session rather than a much bigger average loss.

Nor does a bigger stake buy a better chance of doubling. The balance touched £40 in 24.1% of sessions at 10p and in 20.6% at £1. What the stake does change is the chance of still being ahead when you decide to stop: after 500 spins, 27.4% of 10p sessions were ahead against 4.9% at £1, because nearly all the £1 sessions had ended long before. In cost per minute the gap is tenfold, as the stake is. At 24 spins a minute, the fastest legal pace, the 96.71% version costs about 8p a minute on average at 10p and about 79p a minute at £1.

For one player with £20, the table offers a plain choice. If the aim is an evening’s play, the 10p column delivers it on this model: a median of 926 spins and a one-in-three chance of still playing after 1,440. If the aim is a quick shot at doubling, the £1 column gives a slightly lower chance than 10p, and half of those sessions are over within about four minutes even at an assumed 600 spins an hour. These are Model C figures for Big Bass Bonanza’s published profile. If, as usually happens, a title with a higher ceiling puts more of its return into rare results, its sessions would tend to end empty more often, with the difference made up in a thinner, longer tail.

Which Big Bass slot to pick for what you want

The series is large enough that the choice of title is a real one. The table matches common aims to the titles whose published figures fit them, and to the check worth making first. It uses only the figures in the series table; where a figure is not published, it says so.

Two rows deserve a second look. The lowest-cost row and the highest-ceiling row point to different games, and that is the central trade in the series: the early 96.71% titles charge the least per spin, the 1000 editions offer the largest top prizes at a slightly higher price per spin. And the last two rows are about how you play rather than what: the stake and the terms of an offer move the result more than the choice between two titles at similar RTPs.

What a UK licence gives a Big Bass player

On a licensed British site the games in the series are the same games with British controls around them. Each control has a number attached.

• No bonus buy. The Commission warned operators on 17 January 2020 not to offer feature buy-ins to British customers, after finding one game that charged more than £3,000 to enter its bonus feature; the six operators contacted removed it. In Great Britain the free spins have to be won with scatters. On Model C the round arrives about once in 180 spins, and 180 spins at 10p on the default version cost about 59p on average.
• At least 2.5 seconds a spin, no autoplay, no turbo. In force since 31 October 2021. 100 spins take at least 4 minutes 10 seconds, and an hour holds at most 1,440 spins.
• Stake limits. £5 a spin from age 25 (since 9 April 2025) and £2 a spin from 18 to 24 (since 21 May 2025). At the fastest legal pace on a 96.07% title, that caps the average cost of an hour at £282.96 and £113.18 respectively.
• No false wins. A game may not celebrate a return equal to or below the stake. On Model C, 9% of all spins pay something but less than the stake, which is the kind of result that rule covers.
• Time and net position on screen. The session clock and your total wins or losses must be shown throughout.
• Verification before any play. Since 7 May 2019 that includes free demo versions, so trying a Big Bass title for free on a licensed site still means registering and passing an age and identity check.
• Free spins and bonuses. Since 19 January 2026 wagering on any bonus, spin winnings included, is capped at 10 times, and no promotion may require two types of gambling, such as a bet on football to unlock spins.
• Withdrawals. Since 31 October 2021 a withdrawal request cannot be reversed so that the money can be played again.

None of these rules touches the RTP. The version a casino runs is its choice within what Pragmatic supplies, which is why the information screen matters more on this page than any rule.

Work out what your Big Bass session costs

The calculator is preset for Big Bass Bonanza’s default version: 10p a spin, an assumed 600 spins in one hour, 96.71% RTP. Change the RTP to 96.07 for Keeping it Reel, Hold & Spinner, Amazon Xtreme, Floats My Boat or Day at the Races, to 96.51 for Big Bass Bonanza 1000, or to 94.6 if the information screen shows Big Bass Bonanza’s lowest version. It returns the spins played, the total staked, the average cost, the cost per hour, the average kept per spin and the amount returned on average.

The output is an average over many hours. For what a single session looks like around that average, read the £20 table above: the cost per hour is the price, and the table shows the spread of results it buys.

UK-licensed brands for Big Bass players: offers, groups and records

Only one operator’s link to the series can be stated as fact: Entain’s, through the shop deal and its statements about Ladbrokes and Coral. For every other brand this page says nothing about which Big Bass titles or versions it carries, because game lists change and are not published in a form that can be checked. What the brand facts do tell a Big Bass player is how welcome offers, accounts and accountability differ from group to group.

Entain: the one documented link

Ladbrokes and Coral are Entain’s high-street bookmakers and the two brands named both in the November 2025 deal and in Entain’s statements about how the series performs online. The same group runs Gala Casino, Gala Bingo, Foxy Bingo, PartyCasino, bwin, Sportingbet and Party Poker, several of them behind one account structure, so a single welcome offer across the group is the norm. Entain’s largest Commission fine or settlement was £17m, in 2022. Nothing in its statements says which RTP version of a Big Bass title any of its sites runs.

Where slot-led welcome offers come from

Within Flutter Entertainment, Sky Vegas is the casino-first name and the one most associated with no-deposit spins; Paddy Power, Betfair and Sky Bet are sportsbooks first and normally want a deposit or stake before any casino welcome. At evoke, formerly 888, 888 Casino has traded online since 1997 and advertised no-deposit spins for a decade, and William Hill, part of the group since 2022, accounts for its largest recorded fine or settlement, £19.2m in 2023. Kindred, now within FDJ United, pairs the casino-first 32Red with the sportsbook-first Unibet, and its largest fine or settlement was £7.1m in 2023. Whichever brand an offer comes from, if it names a Big Bass title the terms set its value: the spin stake, whether winnings arrive as cash or as bonus funds with up to 10x wagering, any cap on winnings, and the version of the game.

No-wagering brands and what that is worth on a Big Bass spin

PlayOJO, from SkillOnNet, and MrQ, from Lindar Media, promise no wagering on any bonus, so what spins win is cash, though their spin counts tend to be smaller. On a Big Bass offer the difference is easy to measure. Twenty spins at 10p on Big Bass Bonanza’s default version average £1.93 paid as cash, and about £1.30 if the same winnings must be wagered 10 times on the same version, because the 3.29% edge is charged again on every pound played through.

Platforms, prize wheels, sportsbooks and the high street

Bally’s puts Virgin Games, Jackpotjoy, Monopoly Casino, Rainbow Riches Casino and Double Bubble Bingo on a single platform, with welcomes that typically follow the “deposit £10, play with more” pattern. LeoVegas, part of MGM Resorts, is built for mobile, and BetMGM’s British site has run on the LeoVegas licence and platform since its 2023 launch. Jumpman Gaming’s Amazon Slots, Dream Jackpot and Prime Casino use a prize-wheel spin on a first deposit as their welcome, so the headline is the wheel’s best segment, not its usual one. bet365 (sportsbook first) and Betway (sportsbook and casino under one brand) have deposit-based casino welcomes; bet365’s largest fine or settlement was £582,120 (2024) and Betway’s £11.6m (2020). Betfred, Grosvenor Casinos (Rank), Genting Casino and Admiral Casino (Novomatic) have premises on British high streets, which makes them simple to verify; Betfred’s largest fine or settlement was £3.25m (2023).

Checking any brand in a minute

Enforcement is published against the licence holder, not the brand. For names such as Casumo, Videoslots, Mr Vegas or NetBet, the site footer shows the licence holder and its Gambling Commission account number, and the public register confirms both. A Big Bass game on a site that fails that check carries none of the British rules described above.

Playing Big Bass at an offshore casino: what changes

The four casinos in our ranking are licensed offshore, and searches for the series turn up many more sites without a British licence. Which Big Bass titles any of them carries is for its own lobby to show. What can be said is what changes for a British player who uses one: every rule in the UK section above stops applying. A bonus buy, which Pragmatic’s announcements describe for select markets, is no longer blocked, and neither are stakes above £5 or spins faster than one every 2.5 seconds. Each of those raises the cost of a minute of play, and none comes with a protection attached.

Five such names, Mystake, Goldenbet, Rolletto, Donbet and Velobet, are run by a single Curaçao-licensed company, Santeda International B.V.: not on the UK register, not part of GamStop, open to cryptocurrency, with wagering that has no cap and no route for a complaint to the Commission. Kinghills and NineWin are recent Curaçao sites from operators of sister-site networks, without a public track record, promoted to British players as “not on GamStop”. Rainbet trades under an Anjouan (Comoros) licence held by RBGAMING N.V. and takes deposits in Bitcoin and other coins, though no licensed British site running the Big Bass games does. Roobet and Gamdom are Curaçao-licensed crypto casinos that grew out of the gaming-skins market. None of them holds a licence for Great Britain. Offering gambling to people in Great Britain without one is an offence for the operator; the player is not prosecuted, but has no protection.

In numbers, what is lost is the ceiling on cost. At the £5 limit, the fastest legal hour on a 96.71% title costs £236.88 on average; without a stake limit or a minimum spin time there is no upper figure at all. A bonus buy collapses the wait for the free spins into a single purchase, and the one example the Commission gave cost more than £3,000. The money side has no backstop either: no eight-week complaints deadline, no ADR provider, no ban on reversing withdrawals, no GamStop and no bank protection on a crypto deposit.

Checking a Big Bass game before your first spin

1. Check the site first. Find the licence holder and Gambling Commission account number in the footer and confirm them on the public register.
2. Make sure of the title. The names are close: Big Bass Splash and Big Bass Splash 1000, Big Bass Bonanza and Bigger Bass Bonanza. Each has its own RTP and ceiling, so match the exact name to the ranked table.
3. Read the RTP in the information screen. Compare it with the published default: 96.71%, 96.70%, 96.53%, 96.52%, 96.51% or 96.07%, depending on the title. On Big Bass Bonanza, about 95.67% or 94.6% means a lower version.
4. Turn the ceiling into pounds. Multiply the published maximum by your stake: 5,000x is £500 at 10p and £10,000 at £2. Remember that how often it lands is not published.
5. Choose the stake by the time you want. On Model C, £20 lasted a median of 926 spins at 10p and 41 at £1. Price the hour with the calculator above.
6. Set limits before the first deposit. Answer the deposit-limit prompt, and find the time-out option in the account settings before you need it.
7. Read the offer, if there is one. For free spins on a named title, check the spin value, whether winnings are cash, any wagering (10x at most) and any cap on winnings.

Big Bass myths, and the red flags to walk away from

• “Big Bass Splash pays best, because Entain says it performs best.” Entain’s statement is about performance for Entain, not return. Big Bass Splash publishes 96.71%, the same as Big Bass Bonanza.
• “Newer means better value.” The published RTP fell from 96.71% to 96.07% for the 2022 to 2024 titles and recovered only to 96.51% to 96.53% for the 1000 editions.
• “A 1000 edition pays ten times as much.” Its ceiling is far higher, 20,000x on Big Bass Bonanza 1000 against 2,100x, but its published RTP is lower, so on average each spin costs a little more, not less.
• “The free spins are due.” In the model every spin is drawn independently of the last; on Model C, 57% of 100-spin sessions see no bonus round at all, and that is the normal outcome.
• “A bigger stake makes doubling likelier.” On Model C, £20 touched £40 in 24.1% of sessions at 10p and 20.6% at £1. The bigger stake mainly made the session shorter.
• Red flags: a bonus-buy or turbo button on a site that claims a British licence; stakes above £5 a spin; wagering above 10x on a Big Bass offer; crypto deposits; “not on GamStop”; no licence details in the footer.

Other slot guides for Big Bass fans

This page prices paid play across one series. The neighbouring pages look at a single offer, a whole provider, a year of releases, a ranked or typed shortlist, or play on a phone.

Blueprint’s Fishin’ Frenzy games are the obvious comparison outside the series. Fishin’ Frenzy publishes 96.12% with versions down to 90%, and Fishin’ Frenzy The Big Catch Gold Spins, which Blueprint lists as a UK-only release, publishes 95% with a 2,500x maximum. At 10p a spin, 1,000 spins cost £3.88 on average on Fishin’ Frenzy’s default and £5.00 on Big Catch Gold Spins’ default, against £3.29 on Big Bass Bonanza’s default; at the lowest listed versions the gap widens to £10.00 on either Blueprint game against £5.40.

Staying in control while you wait for the bonus round

A series built around a free-spins round that retriggers and multiplies invites one more spin to see whether the round arrives. The figures on this page are the counterweight.

• Pick the stake from the time you want. On Model C, £20 lasted a median of 926 spins at 10p and 41 at £1. A slower stake is the cheapest way to make a session last.
• Treat a missing round as normal. 57% of 100-spin sessions on the model never reach it, on every RTP version.
• Set the deposit limit when asked. Licensed sites have prompted new customers to set one before the first deposit since 31 October 2025.
• Use the clock and net position. Both stay on screen throughout a session under the 2021 rules; decide in advance which one ends it.
• Take a break that sticks. A time-out pauses one account; GamStop, compulsory for licensed online operators since 31 March 2020, covers them all.

If chasing the next round has stopped being fun, the National Gambling Helpline is free on 0808 8020 133, and BeGambleAware lists further help.

How we worked out the numbers

Game figures come from Pragmatic Play’s own pages and release announcements: RTPs, Big Bass Bonanza’s lower versions, maximum wins, grids and features, and the two volatility descriptions the provider gives. Months are announcement months. Where a figure is not published in those sources, the page says so and does not estimate it. The Entain deal and statements are quoted as Entain made them.

Costs use stake × spins × (1 − RTP), so they are exact averages for each published RTP. Paces other than the 2.5-second maximum of 1,440 spins an hour are assumptions and labelled as such. The distributions come from Monte Carlo simulation on Model C, a model slot built to match Big Bass Bonanza’s published RTP, medium-high volatility class and 2,100x maximum, with a hit rate of 23.9% and a bonus round about once in 180 spins; its lower versions trim the base game and leave the bonus round unchanged. Fixed spin counts used 400,000 sessions (150,000 for 1,000 spins and 200,000 for 300 spins); the £20 runs used 40,000 sessions per stake, stopping when the balance could not cover a spin or after 1,440 spins.

The limits are real. Model C reproduces Big Bass Bonanza’s headline figures, not its reels, and says nothing reliable about titles with ceilings of 10,000x to 25,000x. Real players change stakes and stop when ahead, which the fixed-stake runs do not. The site’s approach to judging offers is set out under how offers are evaluated.

Frequently asked questions