No Deposit Casino Bonus Codes for Existing Players September 2025

Overview of No Deposit Bonuses

No deposit bonuses for existing players offer customers a reward, such as a free bonus or free spins, with no deposit required. Whereas most no deposit bonuses are used to attract new players to a gaming platform, it’s sometimes possible to find them for existing customers.

This may sound too good to be true, but casinos are often keen to provide these, as a way to promote loyalty and to encourage players to deposit into their casino account after using the bonus.

Sometimes a no deposit reward is triggered through a loyalty programme or similar, but, typically, you will need no deposit codes for existing players to unlock them.

Varieties of No Deposit Offers for Loyal Customers

There are various different types of no deposit promos for existing customers. Here are the most common versions that you’re likely to run into:

• Free spins: These are perhaps the most common type, and they give players an opportunity to play a specific slot game for free, with a chance of winning real money.
• Free bonus: This is where the casino account is credited with bonus funds, which usually gives the player more flexibility on how they bet it.
• Cashback bonuses: These are technically a form of no deposit bonus that is often available to existing customers, and involves granting a small percentage of deposits or losses back to the player.
• Loyalty/VIP: Whilst it’s sometimes necessary to make deposits to progress through a loyalty system and unlock rewards, this isn’t always the case.

How We Rate Casinos and No Deposit Promotions for Existing Players

There are several key factors and features that we take into consideration when judging whether a particular no deposit promo for existing players is worthwhile. If it meets our requirements, we assess the casino and feature the bonus on the list above. The reality is that almost all no deposit bonuses are worth claiming, because there’s no risk involved, but the following things still need to be checked:

• Promotion value: We consider the overall value of all bonuses, including max win caps, wagering requirements and percentage wagering contributions. This way, you can be sure that our recommended promos are worth your time.
• Eligible games: In the case of free spins, the bonus is usually restricted to a single game, or to a small selection of games. We check that the RTP (return to player) rate is high enough to give you a chance of beating the wagering requirements.
• Licensing and regulation: Every site featured on Slotozilla holds a valid licence and can be considered legitimate by players. We always do our research!
• Other bonuses: After claiming the no deposit bonus for existing customers, it’s worth knowing that there will be some other incentives for you, such as reload bonuses or a rewarding loyalty programme.
• Customer support: If you’re claiming a bonus for existing players, then the chances are that you already have an account with the casino in question, but it’s always worth considering if the standard of the support you receive is as good as it could be.
• Withdrawal terms: There’s no point claiming a bonus if you’ll never be able to withdraw your winnings! We always check that the minimum withdrawal and accepted payment methods are fair.

Using Bonus Codes on UK Online Casinos

If you’re keen to jump in and claim one of these, take a look at the steps outlined below. Given that there are no deposits required, it’s generally a very straightforward process!

How to Claim

Here’s the Slotozilla step-by-step guide to using no deposit codes for existing players to claim the types of bonuses we’ve described above.

Processing Time:

5 min.

Devices:

Phone, desktop, tablet

1

Step

Choose your bonus and read the T&Cs thoroughly.

2

Step

Copy the bonus code from above, or from the T&Cs.

3

Step

Log in to your existing customer account.

4

Step

Head to the ‘promotions’ page, or similar, and look for the promo code box.

5

Step

Paste the code into the box to receive your reward.

6

Step

Play through your free spins or free bonus and enjoy!

7

Step

If you have any winnings, you’ll need to verify and withdraw.

Bonus Terms and Conditions

Just because there’s no risk doesn’t mean that you can skip the T&Cs, unfortunately! It’s always important to read these, even if it’s nobody’s idea of fun. Doing so will help you to avoid any unpleasant surprises down the road. Here are the main things that you’ll want to look out for when claiming bonus offers that involve no deposit bonus codes for existing customers:

• Win caps: Understandably, some casinos don’t want players claiming a no deposit bonus then hitting the jackpot and walking away with millions! For this reason, these promos often have a win cap, but the actual amount can vary a lot.
• Eligible games: Generally, especially in the case of free spins, there will be a predetermined list of titles with which you can use your spins or funds. If you get a choice, go for the highest RTP.
• Expiry dates: All bonuses expire, but some do so much quicker than others. Be sure you complete the wagering before your bonus expires, whether that’s a matter of hours or weeks.
• Withdrawal limits: Most casinos have these, and they’re often in the region of about £10 to £20. You’ll need to have more than this in your account after beating the wagering, if you’re planning to withdraw right away.

Wagering Requirements

In addition to the above terms and conditions, look for any mention of wagering requirements in the terms and conditions. This is the big one!

Most bonuses come with wagering requirements, and these may be higher than usual for no deposit bonuses. A wagering requirement states that you need to wager through your winnings a number of times before you can withdraw. The average would be about 40x, but it’s common for this number to be higher for no deposit bonuses.

Here’s an example to illustrate how wagering requirements work: Using one of the above no deposit casino bonus codes for existing players UK, you get 100 free spins and wager through them. After this, you’re left with £9.50 of winnings, but you can’t withdraw yet, because there’s a 40x wagering requirement to beat! You’ll need to keep playing through these winnings until you’ve wagered a total of £380 (because 40x £9.50 = £380). Then you can cash out.

Best Casino Games to Play With No Deposit Bonuses for Regular Players

Although many bonuses are tied to a single specific game, regular players will sometimes find that they have a selection of games to choose from when it comes to actually using their newly-claimed bonus. The games that qualify to use with your bonus will vary, so check the terms and conditions, but in the following sections we’ll look at some of the most popular choices.

Slots

Slots remain the most popular online casino attraction, and they are the most relevant to this type of bonus. Free spins are popular with players, and casinos are well aware of this! Most no deposit bonuses do consist of free spins, which can usually be used on a predetermined title, or on a small selection of titles. Here are some of the no deposit slots that are most commonly included in bonus T&Cs:

• Starburst: Arguably the most famous slot game of all time, NetEnt’s Starburst is accessible and easy to play, whilst also offering great visuals and a high RTP rate.
• Big Bass Splash & Big Bass Bonanza: These games, both part of the Pragmatic Play franchise, offer a decent win potential and some fun fishing-themed gameplay.
• Gonzo’s Quest: A real classic, Gonzo’s Quest has been around for years, but is still frequently included in free spin bonuses.
• Book of Dead: An adventure-themed title in the vein of Indiana Jones, Book of Dead is an absolute juggernaut, with a decent RTP that has seen it grow into a timeless favourite.
• Money Cart 2: Although not as commonly included in T&Cs, always keep an eye out for Money Cart 2, which offers thrilling gameplay and an astronomically high RTP.

Table Games

Table games are video versions of casino classics, based on a random number generator in much the same way that slots are. They often have some of the highest RTP rates going, so you could definitely do worse than spending your free bonus funds on a bit of video poker.

Live Casino

Usually, a live casino bonus will be distinct from a regular casino bonus, and they’re not easy to come by. However, they’re often well worth claiming, essentially giving you some bonus funds to try your luck with. If given the choice, consider a high RTP game with a low house edge such as blackjack or certain variants of roulette. Consider playing a few demo rounds first, to ensure that you understand the rules.

Pros & Cons of Claiming No Deposit Bonuses

When using no deposit bonus codes for existing customers, it’s easy to feel like you’re getting something for nothing. It’s true that these promos are as close to free money as you’re likely to find, but it’s still worth considering the following pros and cons!

• Great way to test out new games for free

• Change of winning real money with no deposit necessary

• No need to be a new customer

• High wagering requirements

• Other limitations such as win limits and tight expiry windows

• Can be tricky to find for existing customers

Are No Deposit Offers Really Worth It for Existing Players?

The short answer is: yes, absolutely! These bonuses are more worthwhile than most, due to the fact that they offer a chance to win real money with no financial risk. Casinos offer these to existing customers occasionally in various different forms, as a way to encourage loyalty to the platform.

They may be subject to stricter limitations and requirements, but that’s a small chance to pay for 100% free spins. Ultimately, you’ll probably need a promo code to unlock them, but the latest no deposit codes for existing players listed above are all smart choices.