Top Free Casino Promo Codes for Existing Customers in September, 2025

BetUS Casino is a platform that doesn’t pull its punches in the existing player bonuses department. This is one of the few online casinos with consistent re-up offers, meaning they are available on every single deposit you make. That kind of value is pretty sensational, and the two main deals are as follows:

• 10% Cash Bonus + 20% Casino Bonus (Max Deposit $2,500)

• 100% Casino Re-Up Bonus up to $1,000

You must use the free casino promo codes for existing customers linked to these offers. These are easy to find, and essentially, these two offers provide you with access to $1,750 in bonuses every single week - if you max out both offers. Amazingly, the 10% cash bonus available on every deposit only has a 3x playthrough requirement, too!

Vegas Aces Casino is another platform that seems to offer something special on almost all of your repeat deposits. Once again, you must apply promo codes for each bonus as found on the main website under the promotions tab. By doing so, you can claim any of the following incentives as an existing customer:

• 50% Extra (Max Bonus $500)

• 100% Extra (Max Bonus $1000)

• 10% Weekly Rebate up to $500

• 125% Deposit Boost up to $1,250

The great thing about this casino is that it also gives you guaranteed weekly cashback worth up to $500, shielding you against those dreaded losses. Yet at the same time, the available bonus cash linked to repeat deposits extends into thousands of dollars every single month!

In terms of the sheer scope of existing player bonuses, Slots of Vegas Casino probably takes the win among all the sites we’ve listed here. This platform offers 25+ reload bonuses for existing players, each with its own unique promo code. Qualifying deposits to secure reload offers at Slots of Vegas Casino start as low as $30, too, which is better than the $50 seen at other sites. As for the style of promotions available, here’s what you can expect:

• Deposit Match Bonuses (175% to 350% Boosts)

• Free Spins (20 to 65 Free Spins)

The standout feature of this platform is that the deposit boosts are much larger than those of other casinos in percentage terms. And the vast scale of available boosts means that players of all budgets can grab a slice of the action!

Up to this point, each of the casinos we’ve shortlisted has offered deposit boosts, cashback, and free spins. However, while Super Slots Casino does offer similar incentives, this site is far more creative with the types of reload promotions you can grab. The site has 10+ existing customer promotions running at all times, yet some of the most valuable deals on the table are as follows:

• Daily Cash Race (Prize Pool Worth $15,000)

• Midweek Super Spins (100 Free Spins Available Every Wednesday)

• Refer-A-Friend ($100 Cash + 100 Free Spins)

In addition to these exciting promotions, you have an almost endless stream of slot tournaments to participate in. These tournaments offer prizes deep into the thousands. Since they don’t all require fixed deposits, we consider them to be some of the best no deposit bonuses for existing customers around!

Last but not least, we have to give props to SlotsLV Casino for delivering some of the most frequent incentives for existing players of any casino in the game. On this site, you stand to win prizes every single hour by participating in jackpot slot tournaments. That said, the unique appeal of this platform is that it provides ‘lifetime benefits,’ which means the long-term value of bonuses here is off the charts.

Essentially, SlotsLV Casino does this by guaranteeing that once you reach one of the eight loyalty scheme levels, you’ll stay there - for life. And with progressively lower redemption rates to convert points into cash, every dollar you wager on this site is taking you toward something special. Also, SlotsLV Casino has a great refer-a-friend scheme that offers the following perks:

• Spin Scout (25,000 Points + $20 Cash)

• Bonus Hunter (50,000 Points + $40 Cash)

• Reel Legend (75,000 Points + $60 Cash)