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Slot Boss casino review (UK)

By Lauri Hannelin. Updated:
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 Unlimited
Basic information
Launch date 06/2014
Minimum deposit £10
Platform Rhino / LeoVegas
Sports betting No
Live casino No
Bingo No
Play here » New Customers only. 18+. Minimum deposit: £10. Wagering requirement: 35x deposited amount. Wagering time: 7 days. Players can make more than one deposit to contribute to the wagering. Players can make withdrawals while wagering without forfeiting the bonus. Bonus spin winnings are awarded in withdrawable funds. Bonus spins expire in 3 days. Please gamble responsibly. Full and Bonus apply.

What Slot Boss casino looks like


Slot Boss review

Bojoko rating


➕ Top quality game selection
➕ Seamless mobile version with app alternative
Great customer support
Responsible gaming prioritised


➖ Needs more categorisation for slots


Mastercard Visa Online bank transfer PayPal
Mastercard Visa Online bank transfer PayPal

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. The number of games is not that high, but the operator has clearly prioritized quality over quantity. 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.

Slot Boss has a streamlined layout, making it as easy to use as possible. The left side menu of the page allows for one-click navigation, and the right menu allows for the expansion of additional account-specific settings. The actual theme is also simple; all extraneous elements have been removed, leaving the site with a clean appearance that is complemented by the bright light blue tones and green accents.

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.

Slot Boss is licensed and regulated by the UKGC, ensuring a safe gambling environment.

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Slot Boss Casino first deposit bonus

New players receive a tasty first deposit offer at Slot Boss:

New Customers only. 18+. Minimum deposit: £10. Wagering requirement: 35x deposited amount. Wagering time: 7 days. Players can make more than one deposit to contribute to the wagering. Players can make withdrawals while wagering without forfeiting the bonus. Bonus spin winnings are awarded in withdrawable funds. Bonus spins expire in 3 days. Please gamble responsibly. Full and bonus apply

The welcome offer includes a deposit match bonus, as well as bonus spins without a wagering requirement:

  • 100% bonus up to £150 + 50 wager free spins

With a unique approach to the 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 play on the casino as you normally would, making deposits and withdrawals as you please, and you will eventually receive the bonus amount in full. The only thing to note is that you have seven days to complete the wagering.

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

Significant terms and conditions (slot boss welcome offer)

  • New Customers only. 18+.
  • Minimum deposit: £10.
  • Wagering requirement: 35x deposited amount.
  • Wagering time: 7 days.
  • Players can make more than one deposit to contribute to the wagering.
  • Players can make withdrawals while wagering without forfeiting the bonus.
  • Bonus spin winnings are awarded in withdrawable funds.
  • Bonus spins expire in 3 days.

Please gamble responsibly.

Extra and no deposit spins at slot boss

Wager free bonuses are always a treat because they spare players from having to read through the complicated terms and conditions that are frequently attached to offers. Slot Boss offers a solid 50 bonus spins in their welcome offer, with their 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.

Compare Slot Boss casino bonus

Is the welcome offer good for a boss or just a deal for an intern? Compare the offer and see how it looks.

Bojoko rating 4.6
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 Unlimited
Bojoko rating 3.6
1st deposit bonus 100%/£100
No deposit bonus -
Min. deposit £10
Wag. req. (bonus) 40x (B)
Wag. req. (spins) -
Max cash out Unlimited

Slot Boss Casino game suppliers

NetEnt Microgaming Yggdrasil Play'n GO iSoftbet Thunderkick IGT
NetEnt Microgaming Yggdrasil Play'n GO iSoftbet Thunderkick IGT
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.

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.

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. I would have loved to see some crash games or Plinko here as well, but unfortunately, these are not included.

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.

Desktop game information

  • Games 700
  • Slots 600
  • Table games 30
  • Jackpot games 50

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

  • Total number of live casino games 70

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 bank transfer. This is a bit inconvenient, and I would hope to see at least e-wallet options available in the future.

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. 

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

Depositing methods

MastercardVisaOnline bank transferPayPal

Withdrawal methods

MastercardVisaOnline bank transferPayPal

Withdrawal times

  • Visa 1-3 working days
  • Mastercard 1-3 working days
  • PayPal 1-3 working days
  • 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 licensed by the UKGC.

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.


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Lauri Hannelin

Article by:

Lauri Hannelin

Lauri is a casino enthusiast who has been in the gambling industry since 2019. During his career in iGaming, he has worked in many fields becoming an all-around expert when it comes to online casinos.

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