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Last updated July 7, 2020

Online Slot Bonuses

A slot bonus is a great way to kick-start your online casino bankroll, allowing you to play your favorite slots machines and earn free cash from the casino simply by submitting a bonus code. You can even earn free bonus spins on the best new releases. At Xfire.com, we only recommend and rate bonus slot sites that provide amazing welcome promotions. On this page, we’ll show you how to get started and give you all the advice you need on no-deposit-bonuses, free spins, first deposit rewards and more.

Newly updated for July 2020
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€300
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Over 8000 slot machines
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€300
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1BTC +20
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1000
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Over 1,300 games
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200
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€100 +30
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€200
On your 1st deposit
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Best slots bonus casinos

There are dozens of online slots casinos to choose from, and most slot sites will offer some kind of deposit reward to new customers. Luckily, we’ve done the hard work for you. Our team of top reviewers has handpicked a range of casinos that offer lots of slot games and good signup bonuses. Simply register at one of our top-rated online casinos and earn free money today. Some of them even provide no deposit bonuses, too.

Finding the deals: slots bonus offers

We are here to inform you of the best deposit bonuses for slots available! Our job is to look at the small print attached to any welcome bonus, ongoing promotion etc. and inform our readers whether it is worth their time or not. We’re in the business of saving you time and hassle, by hunting down the best casino bonuses. Our offers list above is your best place to start – we’ve gone through a large volume and selected some of the best UK casino bonuses for you.

We look hard at the terms and conditions to see if the deal holds up to scrutiny. We have a lot of experience with slot sites and the kind of bonus offers they display. The terms may look agreeable – “huge percentage bonuses, stacks of free spins” etc – but we examine the wagering requirements (more on those later) and the timeframes required to achieve them to see just how generous the bonus really is. We also keep our eye on the value of the free spins themselves, and the games on which they are offered can have a real impact on the decision you make.

Although this is ‘free cash’ at the end of the day, getting the right bonus from the right online casino is what will make all the difference in your decision about whether to stay with a casino or not. The right bonus also helps to increase your chances to hit that hugely satisfying win. And at the end of the day, the bonus amount and how you go about utilising it is all-important.

Best online casino slots bonus

You will find several promotions at the best online bonus slots sites. Most offers require some form of deposit, but it is possible to earn real money without using your own cash. Therefore, in some circumstances, you’re able to play free slot games with bonus spins or alternatively, slot games, no deposit free bonus options, too.

Welcome Bonus: The new player bonus is the most common type of casino promotion. You are rewarded by making a first deposit. You can then utilise the bonus amount received in order to play various different titles.

Typically, there will be a maximum limit you can deposit in order to qualify for the promotion. The casino will match your deposit 100-200%, but keep in mind that there will also be wagering requirements attached to such as well.

Reload Bonus: You will usually be rewarded with ongoing bonus slots promotions as a regular customer. A reload bonus will generally be smaller than a welcome bonus, often times being around 50% of your deposit, but will still provide more of an incentive to continue playing.

Free Spins: Casinos frequently offer new players a bonus slots promotion to go along with the deposit offer. In this respect, you will be given some free spins to play on selected slot machines. Any winnings you make are yours to keep as long as you meet the attached wagering requirements.

No-Deposit Bonus: A no-deposit offer doesn’t require you to load your account with funds to receive a bonus. No deposit perks mean that you might be given $10 in free cash to use as you like after registering. Any slots winnings you make are yours to keep. Alternatively, you may be awarded a few free spins with a strict limit on how much you can win and keep.

Slots Tournament/Leaderboard: Some online casinos run slots leaderboard competitions. In a slot tournament, you play a nominated slot over a day or two and try to win as much as you can. You compete against fellow casino players. The higher up the leaderboard you go, the bigger your prize. Prizes might include bonus credits, free cash or gadgets and gifts.

How to claim a free bonus offer

It’s easy to get the best slot bonus and start playing online slots. All you need to do is create a casino account and opt in to receiving a bonus when you register or while you’re depositing. Let’s take you through it step by step:

1. Select a top online casino

Your first move is to select a great casino to play at. At SlotSource.com, we only recommend the best slots bonus casinos. Our top sites offer hundreds of real money online slots, fast payments and reliable software.

2. Open a new account

Registration is an easy process. You will need to supply your home address, phone number, email address and other personal details. You may also need to provide a scan of your passport or driver’s license in order to verify your ID. Once your email address and ID have been verified, you’re good to go.

3. Claim your slots welcome bonus

You may need to enter a special promo code to activate the deposit bonus. However, many of our recommended casinos simply provide the bonus automatically when you make the required deposit. Alternatively, in the case of receiving bonuses, no deposit required, you simply complete the registration and verification process, and the funds are added to your account straight after.

4. Make a first deposit

When you claim your best slots bonus, you will have to make a deposit. The top casinos let you make deposits using reliable and fast payment methods. Make secure card payments in seconds using a prepaid card, such as Paysafecard, or through your e-wallet or bank account. Some sites even accept cryptocurrency deposits, too.

5. Hit the reels and start playing

You’ve claimed your no-deposit-bonus already and/or made a deposit to receive such; now it’s time to start playing. Head to the lobby and select top bonus slots to play. There are many slot machines with bonus games included in them too, which can be triggered while playing with bonus funds or free spins. And some of those bonus rounds are actually present in the form of free spins.

Which slot bonus should you avoid?

Most online casinos offer some kind of bonus for players. But how do you know which promotions to avoid? At SlotSource.com, we only recommend casinos with the best online bonus slots offers. Their promotions have achievable wagering requirements and realistic time limits. We will never rate a casino site that offers poor terms and conditions for players.

Choosing the best slots bonus often comes down to personal preference. Free spins or no deposit bonus rewards are good if you have a small bankroll. A deposit bonus with a large maximum limit will be better if you are planning on playing a lot of slots.

Bonus wagering requirements

Most casino bonuses have wagering requirements attached, which is why it’s good to read up on these, regardless of if you’re claiming a no bonus deposit reward or something else. The wagering requirement is the amount you must play through your deposit in order to earn free cash. When you play a first deposit bonus slots offer, there will always be strict wagering requirements, so it’s vital you do some research before you start gambling on a slot machine.

And this doesn’t just pertain to bonus funds received. Instead, it pertains to free spins as well, with the winnings from such being frequently attached to a certain amount of wagering requirements.

Welcome bonus example: Let’s take a typical example of a best slots bonus. You sign up to a casino that is offering a 100% welcome bonus on your first deposit.

Bonus terms: You are allowed to deposit and claim $20-$500. The casino will match your deposit 100% as long as you wager your deposit 30x within a 30-day period.

You decide to deposit $100. That means you would have to gamble $100 x 30, or $3,000, on bonus slots within your first 30 days. Achieve that and the casino will give you $100 in free cash. Keep in mind as well, that you may only be able to complete those wagering requirements on selected games.

Some casinos have a wagering requirement on your deposit bonus. Let’s say a casino has a requirement of 20x deposit bonus. In our example, you would have to gamble 20 x ($100 $100), or $4,000, in order to get that $100.

Game eligibility: You have made your deposit, and now you need to decide which slots and casino games to play.

Choosing the right first deposit bonus slots is essential if you want to walk away with free money. Importantly, not all slots will be eligible toward the bonus. Most progressive jackpot slots will be exempt, and some high-variance video slots will be as well.

What’s the reason? Well, that deposit bonus will be easy to clear if you suddenly hit a giant progressive in one spin. Usually, eligible slots will be low-variance. These pay out a lot of small prizes and make it harder for you to clear your bonus.

One last point to mention is that in the case of a free spins reward, the spins are usually only available on a small group of specific slots. Sometimes, free spins will only be provided on a single slot. Be sure to read the T&Cs properly to find out which games these are.

How to choose the best slots bonus

It’s easy to find a slots bonus online. But it’s essential you do a little research first. Here is our simple 5-point checklist to get you started.

  1. Choose your bankroll first: Decide your bankroll before you play bonus slots and claim a promotion. Not all first deposit bonuses are the same and you may find your budget isn’t big enough. Play responsibly.
  2. Check the game eligibility: Many of the best slots bonus deals offer 100% eligibility on all games. However, some slots may contribute 20-30% and others nothing at all. Always check the promotion terms and conditions. Even if a promotion includes the best slots game providers, some of their games may not contribute 100%.
  3. Look at wagering requirements: Even the best slots bonus has a wagering requirement. Do your math before you commit and work out if the play-through amount is achievable.
  4. Consider the time limits: When playing the best online bonus slots, you might have a few days or a month to clear a promotional offer. Terms and conditions can vary hugely from site to site.
  5. Check the payout schedules: You’ve cleared your deposit bonus, now you want to get your free cash. How long do you have to wait for your funds? Some casinos release funds immediately, while others stagger payments over a few weeks or months. Check the bonus terms first to see when you will get your money.

Something else that we also recommend when it comes to playing casino slot games, is that it’s probably relevant to check them out in demo mode first. This gives you a look into how they operate and how their bonus rounds activate. Free casino slot games with bonus rounds in them can be found at huge numbers of online gaming sites, so you only need to register for an account and you can play them without depositing any money first.

Best slot bonus FAQ