Casino Welcome Bonuses - Best Bonuses for Slots Casinos

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Take a look at the latest bonus offers from our most trusted online casinos. Our online gambling experts have put together a list of the best bonuses currently available and you can view our hand-picked recommendations below. On this page, we’re also going to be looking at the different types of casino bonus, how they work and what to look out for.

Types Of Casino Bonus Offers

Today, there are various different types of casino bonuses, and the type which you claim will depend on a number of factors including the country you live in, the payment method you use, the licensing jurisdiction you come under - and, of course, the online casino you choose to play at! Below, we’re going to take a look at the most common types of bonus you’ll find at online casinos today.

Free Spins

Free spins bonuses are a lot more common today than they were a few years ago, and a major part of this is the rise in popularity of video slots. Free spins are relatively straightforward, and like a no-deposit bonus they’re awarded for completing a certain action. This could be making a deposit, creating an account or wagering a set amount of money.

You’ll usually be able to choose from a few different games to use your free-spins on; Quickspin, NetEnt and Pragmatic Play slots are commonly tied into free-spins promotions, including popular slots like Guns n Roses:

Guns n Roses Free Spins

Depending on whether you needed to make a deposit to claim the free-spins or not they may have a maximum win cap attached.

No-Deposit Bonus

Unfortunately, no-deposit bonuses aren’t as common as they once were but they can still be found at some online casinos - they’re just a bit harder to claim these days! As the name suggests, a no-deposit bonus is one where you don’t need to make a deposit in order to claim it; for example, some online casinos will offer a no-deposit bonus to new players as an incentive for them to join up. Some online casinos will offer no-deposit bonuses just for signing up, others will credit them once a player completes account verification or other predefined steps.

No-deposit bonuses are great - and you can win real money from them - but they generally come with pretty strict terms and conditions, including unrealistic wagering requirements and maximum cashouts. Online casinos are businesses after all; they can’t simply give out free cash to everyone who joins!

Matched Deposit Bonus

Matched deposit bonuses are the most common type of bonus you’ll find at online casinos and it’s offered at virtually all sites as their “new-player welcome bonus offer”. A matched deposit bonus means that your deposit will be matched by a percentage; usually, matched deposit bonuses are found in the form of a 100% match, but some online casinos offer 200%, 300% and even 400% matched deposit bonuses. Let’s take a look at what this means in practical terms:

If a casino is offering a 100% matched deposit bonus up to £100, that means that they’ll match whatever amount of money you deposit, up to £100. So, if you were to make a deposit of £40 the casino would credit your account with an additional £40, bringing your total account balance to £80. If you deposited £60, the casino would give you an additional £60 bringing your total account balance to £120.

Reload Bonus

Reload bonuses are pretty similar to matched deposit bonuses with the main difference being that they’re generally offered to existing customers of a casino as opposed to new players. Reload bonuses typically come in the form of a “50% matched deposit bonus”, so, if, for example, you deposited £20 the casino would credit your account with an additional £10 bringing your total account balance to £30. Many online casinos like to tie reload bonuses into weekly promotions, so it’s quite common to see them given out at weekends or on pre-planned weekday evenings.

Bonus Codes

Bonus codes were far more popular when players accessed online casinos through downloadable desktop clients and today, it’s pretty rare to see bonus code offers given to UK players. (They’re still quite popular at American-focused online casinos.) However, bonus code promotions do exist, so we’ll cover them here.

Bonus Codes Welcome Bonus

At some online casinos, in the “cashier” area of your account you’ll see a space where you can input a bonus code. Depending on the offer in question, redeeming this code may credit your account with a number of free-spins, a bonus amount or it could even open up a matched deposit bonus. You won’t find them often at online casinos, but some of the larger bookmakers still use them occasionally in their sportsbooks so you might come across them.

Device-Specific Bonus

Device-specific bonuses are something we’ve seen a lot more of in recent years, and they’re designed for players using a mobile device. Usually these promotions are only available to players who are either using the site’s mobile app, or certain mobile-optimized games, and these bonuses can be made available to all mobile device players or those just on Android/iOS devices. When a casino launched a mobile app (quite a pivotal moment for most sites) they tend to run major mobile promotions, and this can include giving away free-spins, matched deposit bonuses and more to mobile players.

High Roller Bonus

As the name suggests, high roller bonuses are designed for those who plan on wagering larger amounts of money - and they’re geared towards those who’ll likely become a regular player at the casino. High roller bonuses aren’t generally any different from the bonuses we’ve already covered but they are, of course, worth larger amounts. They may also have slightly better terms and conditions; after all, the casino is keen to have deposits made. High roller bonuses can extend beyond free-spins and matched deposit bonuses too, and we’ve seen some sites offering prizes including gadgets (mobile phones and tablets) and even holidays to high roller players!

Loyalty and VIP Programs

With so many online casinos out there today, many sites choose to offer a form of loyalty program or VIP scheme. This is designed to incentivize you for long-term play, and you will typically be rewarded when you reach certain milestones. Each casino is different when it comes to loyalty/VIP schemes; some will have set schemes in place that award you things like free-spins and reload bonuses once you’ve deposited/wagered a certain amount while other sites simply state that when you’ve qualified as a VIP you’ll be contacted by a member of the customer support team.

Cashback is quite a common way in which VIP players are rewarded, and it allows you to get a percentage of your losses back; either as cash, which can be withdrawn, or as bonus funds.


If you’re planning on playing regularly at an online casino it’s worth spending a bit of time finding a site that offers a decent loyalty program/

Casino Bonus Terms and Conditions

Every online casino attaches terms and conditions to their bonuses, and we’re going to be taking a look at some of the most common terms you should be aware of when playing with bonus funds.

Wagering Requirements

Wagering requirements are found attached to most online casino bonuses today - especially those claimed as a new player. Wagering requirements are put in place by online casinos to limit their liability and protect themselves for “bonus abuse”. In short, wagering requirements require you to “play through” a bonus a certain number of times before the money can be withdrawn as real cash.

Let’s imagine you have a 100% welcome bonus up to £100 with wagering requirements of 10X. If you deposited £10, you would have £20 in total; £10 in real cash funds and £10 in your bonus balance. In order to be able to withdraw the £10 bonus balance (along with any winnings associated) you’d need to wager the bonus amount (£10) a total of 10 times - so, in this case, you’d need to wager £100.

Game Exclusions and Restrictions

It’s common for casinos to exclude or restrict certain games from being able to be played using bonus funds. Most commonly, this is casino table games, where the casino holds such a small edge anyway that it wouldn’t be financially viable for them to allow bonus funds to be used on them. However, most sites also exclude certain slots from being used with bonus funds. Good examples include classics like Dead or Alive, The Wishmaster - and pretty much all progressive jackpot slots.

Casino Bonus Terms and Conditions

We should point out that virtually all games with any form of “collectable” mechanism will not be able to be played with bonus funds. When claiming a bonus you’ll be able to view a full list of the restricted games, though thankfully, most online casinos now have software in place that doesn’t allow you to even place bets on restricted games.

Game Weighting

If you claim a bonus that can be used on casino table games you will usually find that different types of game have different effects on the wagering requirements. For example, games where it’s near-enough a 50/50 chance - Baccarat and Blackjack, for example - usually only contribute 10% to the wagering requirements, meaning a bonus with wagering requirements of 10X would need to be wagered 100X playing these games.

Video slots usually contribute in full - 100% - towards the wagering requirements, but again, you should always check the specific bonus’ terms and conditions to ensure you know how much your preferred game contributes to the wagering requirements

Maximum Wagers

It’s almost universally accepted that casino bonuses come with maximum bets; this is to prevent players joining, placing one big bet and getting lucky, costing the casino a lot of money. While the exact “max bet” wagers from casino to casino, most bonuses come with a max bet of around £5. Be careful not to bet more than your bonus allows for as doing so could see your bonus funds become void.

Payment Method Exclusions

Due to anti-fraud measures it’s pretty common for players using Neteller and Skrill to be excluded from new-player welcome bonus offers. The reason behind this goes back many years, and these payment methods are harder for the online casinos to verify, so most choose to simply ban them outright.

How We Choose The Best Casino Bonuses

There’s a lot going on behind the scenes here at Slots Temple HQ, and while it may seem like choosing the best online casino bonuses is just a case of looking at which bonuses offer the best value for money there’s a lot more that goes into it than that.

Our team of online gambling experts work hard to only recommend trustworthy, fair and fast-paying casinos… and if a site doesn’t meet our rigorous testing standards it doesn't appear on our website - regardless of how good their bonus offer is. Below, we’re going to run through some of the things we look for when picking the top casino bonuses for our readers.

Game Selection

As a general rule of thumb, the more games an online casino has, the better, and that’s why our experts always want to see an online casino offering a large selection of games. We want to see more than just NetEnt, Microgaming and Quickspin; we want to see smaller game studios like, Iron Dog Studios, Rabcat… because the more games on offer, the better the chance you’ll find a slot or casino table game you actually enjoy!

Free Slots Game Selection

All casinos at Slots Temple offer an ample selection of games for you to enjoy alongside a great welcome bonus offer.

Payment Methods

We realise that you want to make deposits and withdrawals using your preferred payment method - whether that be debit and credit cards or EWallets like Skrill and Neteller - and that’s why our team looks at the number of banking options available at online casinos. If a site doesn’t offer a wide variety of methods - suitable for most players - they don’t get featured on our website. It’s that simple.

Licensing and Security

Any casino taking bets from UK players must be licensed by the UK’s Gambling Commission - and it’s one of the first things our team of experts looks for. If an online casino doesn’t hold a UKGC license they don’t make it onto our site. No exceptions. If you play at a casino that’s not licensed by the UKGC you risk not getting paid out your winnings. All casinos here at Slots Temple hold a valid online gambling license and are fully-regulated.

That’s just three of the metrics we consider when choosing which casinos to recommend; our team looks at a huge number, with others including payout speeds, customer support facilities, ease of use, mobile functionality and responsible gambling tools.