Best Slots Bonus - Updated November 2025

Slot machines lack the glamour of poker and the furore of craps, but the jingling sound of one-armed bandits is ever present in UK casinos. These games attract more players than any other, and that’s even more true online, where they account for the bulk of the average casino’s games.

If you love slots as much as everyone else, this is the guide for you. I will discuss some of the best slot bonuses that you can collect, as well as the places you can find them and ways to get more out of them.

What are the Types of Slot Bonus?

Slot bonuses come in many shapes and sizes. These promotions all differ with regard to their terms and conditions, as well as the extent of the offer, but they are all focused on slots.

No Deposit Slot Bonuses

No deposit bonuses are easily the best type of slots bonus…if you’re a small-stakes player.

These bonuses give you a set number of spins without requiring a deposit. The wagering requirement is usually quite strict (see below for more information), and you often only get 20 or so spins.

Still, free is free, and these bonuses are a great way to introduce yourself to a casino.

The reason they don’t work so well for high spenders is that those 20 spins likely have a value of just £2 or £5, which won’t appeal to someone who deposits a greater amount.

If you collect one of these bonuses, you may be prevented from picking up a more substantial deposit bonus or even a cashback offer, in which case they’ll do more harm than good.

Free Spin Deposit Bonuses

High spenders will be more interested in these offers, as they can provide upwards of 100 and even 500 free spins.

Free spin deposit bonuses require a deposit and usually provide you with a mixture of spins and credits. The spins are often fixed, while the bonus credits are based on your deposit.

Take the following as an example:

100% Matched Deposit Bonus up to £500 + 100 Free Spins (Min. £10)

This is just an example, but it’s the sort of bonus you’ll see on countless UK casinos.

If you deposit £10, it will be matched 100%, giving you another £10 in bonus credits. If you deposit £100, you’ll get £100, while a deposit of £500 or more will give you £500 extra.

In all cases, you’ll also get those 100 free spins, as you’re meeting the £10 minimum requirement each time.

The spins are fixed to just one or two games, the most popular of which include:

• Gonzo’s Quest
• Fluffy Favourites
• Starburst
• Rainbow Riches

Reload and Loyalty Slot Bonuses

Reload bonuses are bonuses that encourage you to “reload” your account with cash. When you do, you’ll be given a bundle of spins/credits. 

These bonuses are targeted at active players. The most loyal players can also join loyalty programs.

Loyalty schemes give players points every time they play. They can then either swap those points for free spins or earn a bundle when they hit a certain milestone.

VIP programs take this idea to the next level. They are reserved for the high spenders. Some of them give you access when you make it to the end of the loyalty program, while others are invite-only, with those invites limited to players who deposit and wager large sums on a regular basis.

The key to using these programs is to not get too caught up in how many points you have collected. Don’t trick yourself into thinking that if you deposit more and bet more, you’ll get more points, making the extra risk worthwhile.

In other words, don’t do what I did the first time I got a Nectar card. I went on a spending spree, spending way more money than I should have done just to “save” myself a few quid on a future Sainsbury’s shop. I cannot be trusted with loyalty cards, and if I had the patience to stick with a single casino long enough, I probably couldn’t be trusted with a loyalty scheme, either.

It’s best to do what you usually do and ignore the loyalty points. Every few days or weeks, check what you’ve collected and see if you can convert them into anything useful.

Also, don’t bet more just because it’s Happy Hour and you get double points. It’ll likely equate to a few extra pence. By all means, save your usual playing session for a little later if it coincides with Happy Hour, but don’t risk pounds just to get a few pennies.

Real Money Slot Tournaments

Slot tournaments are available at many top UK casinos. They give players an extra incentive to spin their favourite slots by awarding a series of prizes, including free spins and bonus credits.

Tournaments run for a fixed period, either a few hours, a few days, or a month. During that time, players earn points when they wager a minimum sum on a qualifying slot machine.

The players who collect the most points will climb to the top of the leaderboard. 

Slot tournaments are fantastic when the points are based on win percentages. It means the player who wins £100 from a £0.10 bet gets the same points as the player who wins £10,000 from a bet of £10.

However, some tournaments award points based on the total amount won, and these are only worthwhile if you’re a high roller.

If you’re betting £0.10 at a time, and a dozen other players are wagering £100, there’s no way you’re competing with them, no matter how many spins you take.

What are the Terms and Conditions of Slot Bonuses?

Before collecting a slot machine bonus, be sure to check the terms and conditions. There are a few in particular that you should look out for, and I have highlighted these below.

There may be some other requirements to look out for as well. Check the full terms and conditions to learn more.

Minimum Deposit

All deposit bonuses have a minimum deposit requirement. If you fail to deposit this amount then you won’t be given the bonus.

If it’s a first deposit bonus, you can’t simply deposit again to collect it the second time around. That will be your second deposit, not your first, so it won’t apply. It sounds obvious, but I’ve been there. I’ve done that. And I have appealed to customer support to forgive my stupidity (I didn’t succeed).

Most deposit limits are fixed at £10 or £20, but they can be higher. Many high-roller bonuses have minimum deposit limits of at least £50.

Spin Value

How much are the spins worth? This is something that many players overlook. They lose themselves in the total number of spins and forget about the actual value.

You think, “100 free spins, that’s amazing!” but if you check the spin value, you may discover they are worth just £0.05 each, turning that seemingly impressive bonus into a rather disappointing one. Conversely, if the spins are worth £0.50 each, even a 20 free spin bonus will be worthwhile for most players.

Qualifying Slot Machines

Are the spins fixed to games like Starburst and Fluffy Favourites? Are they available on all of the casino’s games? A slot bonus is only worthwhile if you actually like the slot, so make sure you check this requirement.

This is very important if you are as picky as I am. I love slots, but I have never warmed to Starburst or Fluffy Favourites, and these are two of the most common free spin slots.

Withdrawal Limits

Slot bonuses often have a win limit or a withdrawal limit. These limits prevent you from winning above a certain amount. Your winnings won’t be void if you exceed this amount, but you’ll lose all of the funds over the maximum.

If it’s a win cap, you can’t exceed that amount when playing. If it’s a withdrawal cap, the extra funds will be available to get through the wagering period, but they’ll disappear when you withdraw your balance.

Wagering Requirements

Most bonuses require you to wager the funds a specific number of times before they can be withdrawn. Where free spin bonuses are concerned, the wagering requirement applies to the winnings. So, if it’s fixed at 10x and you win £10, you must wager £100 before you can withdraw.

Payment Methods

Many casinos exclude payment methods like Neteller, Skrill, and PayPal from their deposits. Even if you meet the minimum deposit amount, the bonus will be void if you use these methods when the terms and conditions exclude them.

It’s likely because these methods charge higher fees, so it’s not viable for the casino. Either way, it can be frustrating if these are your chosen payment methods.

Furthermore, thanks to “closed-loop” transactions, you can’t simply deposit with a Visa, collect and use a bonus, and then withdraw using PayPal, Skrill, or Neteller. You must first withdraw your deposit funds back to the original deposit method.

Time Limit

All bonuses have time limits.

Where slot bonuses are concerned, you will likely be limited with regards to how long you have to collect the bonus, the period in which you must use it, and the timeframe for clearing the wagering requirement.

Collect the Best Slot Bonuses

Ready to collect some slot bonuses and start spinning? You’re in the right place.

All the casinos shown here offer slot bonuses. They also have hundreds and sometimes even thousands of slots to enjoy.

Take your pick, and if you need more information, read some of my reviews.