Slot Boss Review

By Lauri Hannelin. Updated:

Our Slot Boss Review showcases the bonuses, game selection, payment methods, withdrawal time, and more. See our expert's thoughts in our player-centric review.

1st deposit bonus 100%/£150 + 50 bonus spins
Bonus code: -
Minimum deposit for bonus £10
Extra 1st deposit bonus info
Wagering requirements (bonus money) 35x (D)
Wagering requirements (bonus spins) -
Maximum bet for wagering -
Maximum cash out £150
Basic information
Launch date 06/2014
Minimum deposit £10
Platform Rhino / LeoVegas
Sports betting No
Live casino No
Bingo No
Online bank transfer
Play here » Full T&Cs apply. New player only. 7 days to claim offer and deposit a min of £10 with a further 7 days to wager 35x. Cash stakes only and wagering contributions vary. Max reward: £150. 50 wager-free spins 0.10 each on Big Bass Splash awarded after wagering complete, winnings paid as cash. 3 day expiry. 18+ Please gamble responsibly. Full and Bonus apply.

What Slot Boss Casino Looks Like




Slot Boss is a prime example of a cutting-edge casino that does practically everything right. It's under the wing of LeoVegas Gaming PLC, known as the king of mobile gaming. Slot Boss impresses with its stellar bonuses, versatile game library, and user-friendly interface.

Bojoko rating This review was made independently by Bojoko’s casino experts. Rating score is based on both quantitative and qualitative factors. The review method is uniform for all casinos affiliated with Bojoko, so you can easily compare this casino with other brands.







Player rating

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Top-quality game selection
Seamless mobile version with app alternative
Great customer support
Reponsible gambling prioritised


Needs more game categories

Deposit Methods

Mastercard Visa Online bank transfer PayPal Revolut

Withdrawal Methods

Mastercard Visa Online bank transfer PayPal Revolut

Slot Boss Overview

Originally launched in 2014, Slot Boss has entertained players with a huge selection of slots since day one. The brand has been under the wings of industry behemoth LeoVegas since 2018, which already says a lot about the level of this casino.

As its name suggests, the main emphasis of Slot Boss is slots. With nearly all of the top-level providers represented, the operator has gathered the best of the best for its site. In terms of variety, I couldn't have asked for more. The casino covers themes from the glitter of Starburst to the flower blossom of Sakura Fortune, and mechanics from traditional fruit machine slots to the newest Megaways variants.

In addition to slots, Slot Boss has a great selection of table games, live dealer games, and instant win games to suit every preference. Each has its own dedicated category, with a particular focus on the beloved Slingo games that account for the majority of the instant game selection.

The operator ensures a high-quality gaming experience by offering players round-the-clock support. They also have a highly functional help centre to get you going on the casino. I found everything from game-related matters to payments here, with clear, thorough instructions.

Play on Slot Boss Casino »

Slot Boss Bonus Details

Slot Boss rewards players with generous bonuses, including no wagering casino bonuses. The bonus model is unique here, and it starts with the following sign up bonus:

Slot Boss departs from the norm with their first deposit bonus. Instead of receiving the bonus funds to your balance immediately, you first complete the required wagering using your deposited funds.

I admit that it sounded a little odd to me at first, but after familiarising myself with the terms, I can confidently say that this is one of the best bonus models out there.

Starting off with the basics, the offer has a £10 minimum deposit and a 35x wagering requirement. Both of which match the gold standard conditions.

Slot Boss allows you to make more than one deposit to contribute to the wagering while allowing you to withdraw winnings without forfeiting the bonus funds.

Once you reach the required wagering, you receive the bonus amount as withdrawable funds. Simply put, you can make deposits and withdrawals as you please, and you will eventually receive the bonus amount in full.

Personally, I believe that more bonuses should be given in this manner, as they reward the player more likely than conventional bonuses. Naturally, some players prefer the traditional route, but Slot Boss' welcome bonus is unquestionably worthwhile.

Slot boss sign up offer banner

Significant terms: Full T&Cs apply. New player only. 7 days to claim offer and deposit a min of £10 with a further 7 days to wager 35x. Cash stakes only and wagering contributions vary. Max reward: £150. 50 wager-free spins 0.10 each on Big Bass Splash awarded after wagering complete, winnings paid as cash. 3 day expiry. 18+ Please gamble responsibly. Full and bonus apply.

Wager-Free Spins

Wager-free bonuses are always a treat because they spare players from the complicated terms that are frequently attached to offers. Slot Boss offers a solid 50 no wager spins in their welcome offer, with the winnings directly available in withdrawable cash.

The spins are credited to one of Pragmatic Play's most popular titles, Big Bass Splash, in one batch, with three days to use them. The traditional 5-reel slot offers a fishing adventure with wild symbols and a bonus feature.

The spins are valid for three days after you activate the offer. That's it, really, plain and simple.

Slot Boss Bonus Codes

There are no bonus codes available at the moment for Slot Boss. Keep an eye on our Slot Boss review for any updates, we highlight the promo codes on this page whenever the casino adds one.

Slot Boss Sign Up Offer Compared to Other Casino Bonuses

The sign up offer at Slot Boss is an interesting one; it offers great value with both a deposit match bonus and a no wager spins deal. The actual terms are great too, and I think the promotions here are made with a player-centric approach.

You can use our interactive comparison tool to see how this promotion stacks up against other casino's bonuses. Pick a casino using the magnifying glass, and see how the size, value, and terms match up.

Bojoko rating 4.5
1st deposit bonus 100%/£150 + 50 bonus spins
No deposit bonus -
Min. deposit £10
Wag. req. (bonus) 35x (D)
Wag. req. (spins) -
Max cash out £150
Bojoko rating 4.1
1st deposit bonus 100%/£100
No deposit bonus -
Min. deposit £10
Wag. req. (bonus) 40x (B)
Wag. req. (spins) -
Max cash out Unlimited

Game Suppliers

Slot Boss has an impressive lineup of game suppliers in its portfolio. The Boss has added the likes of Play'n Go, NetEnt, Pragmatic Play, QuickSpin, Evolution Gaming, and many more high-calibre studios to its catalogue.

Plus, the brand stands by its name by offering numerous alternative game developers. You'll find nearly 40 different suppliers here, making up a versatile game library.

You can view the full game supplier list below.

NetEnt Microgaming Yggdrasil Play'n GO Thunderkick IGT 1x2 Gaming
NetEnt Microgaming Yggdrasil Play'n GO Thunderkick IGT 1x2 Gaming
Evolution Gaming Pragmatic Play Authentic Gaming OnAir Entertainment

Slot Boss offers a diverse selection of games for slot enthusiasts. The selection is showcased with the most popular titles featured first in vibrant icons. These include timeless classics, Jackpot King titles, and some hot releases from the biggest game studios. Slot Boss Casino has earned a spot in our overall top 10 casino list thanks to its excellent casino offerings. You can discover the complete list on our top 10 casino sites page.

The home page features some basic categories to get started with, such as Megaways slots and Jackpot slots. Unfortunately, the categorization doesn't carry over to the slots lobby, which doesn't feature any additional subcategories. Overall, I would have hoped for better categorization with further themes and mechanics as their own sections.

I liked the attention to detail, with Bigger Bass Bonanza being designated as the game of the week and new releases being separated by a clever tag. You can also see the Gigantic Jackpots, which are updated in real-time to show their current amounts. These are classified as Mini, Minor, Major, and Mega. You can participate in the total prize pool and win one of the growing pots by opting in and wagering an extra £0.09 per round.

Slot Boss jackpot slots banner

In addition to slots, Slot Boss offers table games and instant games in their dedicated lobbies. Although the selection of table games is not as wide as it is for slots, the operator does cover all the traditional table games as well as some intriguing variations.

Slingo fans are in for a treat at Slot Boss, with the instant games lobby boasting over 15 different Slingo variants, such as the popular Reel King Slingo, Slingo Starburst, and Slingo Extreme. You can also find some of the most popular crash gambling games here.

To summarise, Slot Boss delivers exactly what it promises: the best slots from the leading game developers. They could use some tweaking to make it easier to filter the selection, but the overall experience is grand.

Game Information

  • Games: 700
  • Slots: 600
  • Table games: 30
  • Jackpot games: 50
  • Crash games: 7

The number of games is an approximation at the time of writing the review. The numbers may change when new providers are included and new games are added.

Slot Boss provides a complete live casino experience. Their live casino features all of the traditional game types, as well as exclusive tables and immersive game shows. 

The lobby is filled with tables from industry-leading providers like Evolution and Pragmatic Play, as well as a number of other providers who add variety to the mix. What I liked the most was that the selection felt hand-picked, with a couple of tables for all game variations. For instance, the roulette category features 25 tables, with each of them being a unique variant of the game.

The live casino lobby has smart and user-friendly categorisation. With each game type sorted neatly into its own individual category, it was easy to browse the available tables. 

All in all, Slot Boss is a great choice for all live casino fans.

Live Game Information

  • Live casino games: 70

The number of games is an approximation at the time of writing the review. The numbers may change when new providers are included and new games are added.

The popularity of mobile gaming has skyrocketed within the last ten years, and it has become incredibly important for modern online casinos to adapt to this trend in order to succeed. Slot Boss provides a casino that is not only easily accessible on mobile devices but also user-friendly and enjoyable.

Slot Boss' mobile interface mirrors the desktop version of the site, featuring a comparable layout that was essentially scaled down for the mobile platform. Thanks to HTML5 support, you can access the casino directly from your preferred browser without having to download anything.

If you want an even smoother experience, you can download the Slot Boss app, which is available on both Android and iOS. The application has the same features as its browser-based version, with even faster transitions and loading times.

My overall experience on mobile was fantastic. Everything, from the navigation to the game loading times was first-rate.

Slot Boss doesn't have the best variety when it comes to payment methods. I was able to choose from four methods, including Visa, Mastercard, PayPal, and Apple Pay. While this covers the basics, I would hope to see at least e-wallet options available in the future.

Payment method Min deposit Min withdrawal Possible fees
Mastercard £10 £1 -
 Visa £10 £1 -
PayPal £10 £1 -
Apple Pay £10 £1 -

The minimum amount you can deposit is £10, matching the gold standard of the industry. This is a great spot for any casino, allowing players to try the site without a large deposit. 

What I found exceptional was the fact that Slot Boss doesn't limit the amount you can withdraw. If your withdrawal is less than £10, you must contact the support team to manually process the payment, but you are still free to withdraw as little as you want. 

Slot Boss has an average withdrawal time of 1-3 hours with PayPal and 12-24 hours with cards.

The operator ensures that all withdrawals are processed as soon as possible. With LeoVegas behind the brand, the withdrawal speeds are generally lightning-fast.

Withdrawal times by method:

  • Visa: 0-3 working days
  • Mastercard: 0-3 working days
  • PayPal: 0-24 hours
  • Bank transfer: 1-6 working days

Slot Boss goes above and beyond in terms of customer service. If you run into issues, the first thing you should do is visit the Help Centre. The help topics cover everything from account-specific topics to GDPR and safer gambling. Each section can be expanded to numerous subsections, with pretty much everything you could think of covered.

If you don't find an answer in the Help Centre, you can contact the team around the clock. Slot Boss was quick to pick up my query, and I received first-class support from a friendly agent. 

If your issue doesn't need immediate attention, you can also email the team. The usual response time is within 24 hours, which is great.

  • Email support: ✅
  • Live support:
  • Phone support:

Slot Boss is a licenced casino, and like all licenced casinos, it must strictly comply with the Know Your Customer regulations. This is done to prevent underage gambling and money laundering. 

Your identity will be verified as part of the KYC process, which may include submitting the following documents:

  • Proof of identity
  • Proof of address
  • Proof of deposit

You can upload the documents directly via the document uploader available in your profile. I was able to submit the documents right after registering, which was great, especially as the team ensures that you receive a response within 24 hours.

Slot Boss is a safe casino that is licensed by the UKGC. The brand is operated by LeoVegas Gaming PLC, which has won numerous awards in the iGaming industry.

When it comes to responsible gambling, I was happy to see that the operator sets the example for all other casinos to follow. The safer gambling page includes a self-assessment test, useful information, and links to organisations that can assist you. Furthermore, you find instructions on how to set responsible gambling limits to stay in control.

The available responsible gambling tools include:

  • Deposit limits
  • Loss limits
  • Wagering limits
  • Session limits
  • Reality checks
  • Self-exclusion

You can and should set your own limits for daily, weekly, and monthly periods to ensure that your gambling stays under control. Even if just as a precaution.

Along with comprehensive responsible gambling coverage, the operator also offers the LeoCare programme, which provides assistance to those who have become addicted. All in all, the operator stands apart from the rest when it comes to responsibility.

Slot Boss sister sites include Pink Casino, LeoVegas, and BetUK. These casinos are all operating under the LeoVegas Gaming casino network.

  • Pink Casino: Pink Casino lives up to its name, offering a vibrant pink-themed gaming hub. You can dive into a wide selection of slots, table games, and live dealer tables in a lively setting. It's the perfect spot for those seeking a bit of entertainment, with a welcoming vibe that belies its serious gaming credentials.
  • LeoVegas: LeoVegas is a name that needs no introduction and is the original online casino of the renowned operator. This online casino is an all-in-one destination for every type of player.
  • BetUK: BetUK is more geared towards the sports betting fans, but also offers a neat selection of slots and live casino games. Its a great casino for newcomers, as it's really easy to use without anything too fancy.


Slot Boss is owned by LeoVegas Gaming PLC.

Slot Boss is a legitimate online casino. It is licenced and regulated by the UK Gambling Commission and the Malta Gaming Authority, ensuring a safe and fair gaming environment.

Slot Boss is completely safe. It utilises the latest encryption technologies to safeguard financial and personal data.

About the Author

Lauri Hannelin

Reviewed by:

Lauri Hannelin
Lauri, a passionate casino enthusiast, embarked on his journey in the gambling industry in 2019. His career has spanned various facets of the iGaming world, from technical and commercial roles to innovative positions in online casino and sports betting companies. This diverse experience has not only deepened his understanding of the industry but also shaped him into an all-around expert in online casinos.


This review was made independently by Bojoko’s casino expert. Rating score is based on both quantitative and qualitative factors: bonuses, game selection, payment methods, customer service and usability.

The review method is uniform for all casinos affiliated with Bojoko, so you can easily compare this casino with other brands.

See the full review methodology here.

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