The Best Casino Bonuses At 18+ Gambling Sites
What makes an online casino bonus the best? The best casino bonuses at 18+ gambling sites are the ones that award members the most money, with the easiest completion terms attached. By that, we mean realistic conditions that can actually be completed, not lofty expectations that will never be reached.
Online casino banking options also factor heavily into the amount of a gambling bonus that will be rewarded. If you’d like to learn more about these casino bonus codes and how the promo cash works, read the remainder of this guide and explore the benefits of all that extra gambling cash.
18+ Gambling Sites With The Best Casino Bonuses
| Site Name | Bonus | Age | USA | Visit Site | |
|---|---|---|---|---|---|
| 1 |  | 100% Max $3,000 | 18+ | Play Now Full Review | |
| 2 |  | 200% Max $5,000 | 18+ | Play Now Full Review | |
| 3 |  | 350% Max $2,500 | 18+ | Play Now Full Review | |
| 4 |  | 150% Max $3,000 | 18+ | Play NowFull Review |
BovadaLV Casino is the top 18-friendly online casino today and has held our top ranking for over a decade here at C18. Matching their top-rated reputation is a Bovada Casino welcome bonus that varies depending on whether you use cash or cryptocurrency, as well as a refer-a-friend bonus that can be used as many times as you like.
- $3,750 Bovada Casino Bonus (Cryptocurrency) – The first three casino deposits you make with cryptocurrency as a Bovada account holder are eligible for a bonus of 125% worth as much as $1,250. Multiply that by three, and that’s almost four grand in money to use in the online Bovada casino. 50X rollover is applied to the first deposit with 25X for the second two. Bovada Bonus Code: BTCCWB1250 / Code For 2nd And 3rd Deposits: BTC2NDCWB
- $3,000 Bovada Casino Bonus (Credit/Debit Cards) – Up to $1,000 can be earned on your first three cash deposits at Bovada with a match of 100%. The terms include 25X rollover. Bovada Casino Welcome Bonus Code: CAWELCOME100 / Code For 2nd And 3rd Deposits: BV2NDCWB
- Bovada Refer-A-Friend Bonus – This referral bonus can be claimed an unlimited number of times. Members can create a promo code that a friend can use to create a Bovada account. When that friend makes a deposit, a 200% bonus worth up to $200 will be added to the account of the referrer. Another $75 will be added to the referral bonus if the friend deposits using cryptocurrency. There is a 30X rollover requirement attached. Games of Blackjack, Baccarat, Sic Bo, Craps, and Roulette do not count toward the rollover.
The following Bovada casino games and associated percentages apply to repaying the terms of any bonus cash offer.
- Slots, Specialty Games – 100%
- Table Games, Texas Hold’em, Three Card Rummy – 20%
- Video Poker, Blackjack, Reels and Wheels XL, Pontoon, Double Exposure, Pontoon 21, Pirate 21 – 10%
- Single Deck & Double Deck Blackjack, Roulette, Baccarat, French Roulette, Zoom Roulette, Double Dragon Roulette – 5%
- Craps, Live Dealer Games, Hot Drop Jackpots – 0%
A top 18 and over casino site that we often play with is SlotsLV, and we love their focus on slots! What also makes them special is the free money that they give you when depositing money into your account. Once again, cryptocurrency deposits earn much higher bonuses than when using cash. Friend referral bonuses are also offered at SlotsLV. You will not need to enter a bonus code for Slots LV to activate a promotion. A bonus can be selected from a menu during the Slots LV deposit process or by clicking your account profile icon and then the “My Rewards” section.
- SlotsLV Crypto Welcome Offer – If you are a new member and a first-time cryptocurrency depositor at SlotsLV, you can claim a casino bonus worth up to 200% of the transaction, maxing out at $3,000. A 35X rollover requirement is applied to the bonus cash and deposit. This online casino bonus also comes with 30 free spins on the popular slots title, Golden Buffalo.
- SlotsLV Credit Card Welcome Offer – 18-friendly online casinos prefer cryptocurrency, which is why their welcome bonus for new sign-ups using credit cards is not as lucrative. This 100% deposit matching bonus rewards you up to $2,000 (35X rollover) and throws in 20 free Golden Buffalo spins for good measure.
- SlotsLV Refer-A-Friend Bonus – Any time a friend signs up for a SlotsLV account and uploads cash, you can earn a 100% bonus worth up to $200 based on their deposit. If your friend deposits with crypto, an additional $25 will be added to your bonus. (slots, Keno, and scratch card games are the only games that count toward the 35X rollover on this bonus).
The rollover terms for all Slots LV bonuses can be satisfied using the following wagering conditions:
- Slots (All) – 100%
- Keno – 100%
- Pai Gow Poker – 20%
- 3-Card Poker – 20%
- Let ‘Em Ride Poker – 20%
- Caribbean Poker – 20%
- Video Poker – 10%
- Blackjack – 10%
- Single & Double Deck Blackjack – 5%
- Baccarat – 10%
- Reels and Wheels XL – 0%
- Roulette – 5%
- Craps, Live Dealer Games, Hot Drop Jackpots – 0%
Another up-and-coming online casino that accepts 18-year-old players is Café Casino. We enjoy their cash games of slots, live dealer games, and promo offers. Café Casino promo codes are not required for you to accept a bonus. Just choose which one you want from the rewards menu inside your account or while making a deposit. The funding type you choose impacts the amount of the bonus, as cryptocurrencies will place more promo cash in your account than credit or debit cards. There are also weekly mystery bonuses that appear on your account dashboard each Thursday that can take on any shape and size imaginable. Have fun!
- 350% Welcome Bonus – Deposit With Crypto And Get Up To $2,500 – When you make a deposit for the first time with cryptocurrency you can get an extra $2,500 via a 350% bonus. There is a 40X playthrough requirement, and the fulfillment terms got game types are listed below.
- 250% Welcome Bonus – Deposit With A Credit Card And Get Up To $1,500 – If you’re a new CafĂ© Casino member making your first deposit with a credit or debit card, you can match those funds by 250% and get up to $1,500 as a bonus. The 40X rollover can be completed using the percentages listed in the chart below.
- Weekly Mystery Deposit Bonuses – Every Thursday, a new mystery bonus is presented in your user Café Casino perks dashboard that you can choose to accept. All Café Casino mystery bonuses are subject to their standard wagering guidelines.
- $100 Referral Bonus – If you know someone that you think would like to become a Café Casino member, send them the referral code provided to you and get some bonus cash if they join and deposit. This Café Casino bonus is worth up to $100 for cash deposits, and an extra $25 for cryptocurrency uploads (50X playthrough requirement).
The terms of any bonus code for Café Casino can be fulfilled using the following guidelines:
- Slots – 100%
- Table Games – 20%
- Video Poker – 10%
- Blackjack (Unless Stated Otherwise) – 10%
- Reels and Wheels XL – 10%
- Wild Texas – 10%
- Single Deck & Double Deck Blackjack – 5%
- Roulette – 5%
- Baccarat – 5%
- Craps, Live Dealer Games, Hot Drop Jackpots, Any Other Games Listed In The Terms – 0%
Ignition Casino crypto bonuses and cash promos are extended to every member who makes their first deposit. There are no Ignition bonus codes to enter because the promotion can be selected from a menu while making a deposit. You can also earn extra cash by inviting anyone you know to join Ignition by creating a custom code and sending it to them. Crypto users are in store for a stout $3,000 in bonus casino money if the maximum deposit is submitted on the first go at Ignition Casino.
- $3,000 Poker & Casino Welcome Bonus (Cryptocurrency) – The funds are split for use between the Ignition poker room and the casino at a rate of 150% up to $1,500 each. Poker bonuses are awarded at $1 for every 30 Ignition Miles accumulated via the completion of hands. The poker portion of the bonus is rollover-free, but the casino bonus has a 25X playthrough requirement.
- $2,000 Poker & Casino Welcome Bonus (Credit/Debit) – This bonus works the same way as Ignition’s crypto promo, but the terms split the promo cash between the casino and poker room at a rate of 100% up to $1,000 per venue.
- Invite Your Friends To Ignition Casino And Earn Up To $125 – You can add up to $125 to use in the Ignition Casino by sending a referral code to a friend who wants to join. Once your friend signs up for an Ignition Casino account and deposits at least $20, you’ll get 200% of that total up to $100. Cryptocurrency deposits will add an extra $25 to referring accounts. (25X Casino Rollover)
The following wagering contribution percentages apply to repaying the terms of all Ignition Casino bonuses unless otherwise noted in the conditions.
- Slots, Specialty Games – 100%
- Table Games, Texas Hold’em, Trey Poker, Casino Hold’em, Oasis Poker, Three Card Rummy – 20%
- Video Poker, Blackjack (unless stated otherwise), Reels and Wheels XL, Pontoon, Pontoon 21, Double Exposure, Wild Texas – 10%
- Single Deck & Double Deck Blackjack, Roulette, Baccarat, French Roulette – 5%
- Craps, Live Dealer Games, Hot Drop Jackpots – 0%
What Are Online Casino Bonuses?
Casino bonuses are offered to first time and often repeat depositors at online gambling sites as a perk to keep doing business with them. Members can either attain a casino promo code from the bonus section of each website or pick a bonus from the menu in the deposit screen.
The casino bonus money is added to online accounts at the same time the deposited cash is uploaded. Any money or free spins that land in accounts as a result of casino promotions can be used to gamble immediately.
How Do Online Casino Bonuses Work?
Each 18+ casino we recommend features a section or a page that is dedicated to their current promotions and bonuses. New members are always offered a welcome bonus which is usually more beneficial than future promos.
Many sites also offer reload bonuses or special offers for certain games that can include free spins, free tournament entries, and contests. As long as members meet any attached conditions, the money can be withdrawn at request.
Rollover Requirements And Completion Terms
In most cases, there will be terms that must be completed before any bonus money can be requested for withdrawal. The most common conditions attached are rollover terms, which is how many times the bonus must be gambled before a payout can be asked for.
Another thing to consider is how these terms can be repaid. Most online casinos have wagering charts that outline how each game contributes to the conditions. Slots usually repay at 100%, so consider those if you are behind on your playthrough and short on time.
Are Online Casino Bonuses Worth It?
Absolutely, casino online bonuses are worth it. The key is meeting the terms before the deadline to enable the bonus for withdrawal. These conditions can be completed by high rollers and by players that don’t intend to gamble that often.
If your gambling activities will easily send you soaring past the rollover, then accept the bonus and get all the free money that you can. If you don’t intend to play at the online casino that much, then make a deposit closer to the minimum so that the terms will be easier to complete.
Types Of Online Casino Bonuses
The most common and often the best casino bonuses are the ones extended to new depositors. The highest matching percentages and dollar maximums are commonly offered for casino sign up bonuses, as most of the venues among our 18-friendly casinos reviews are highly competitive and eager for your business.
Reload bonuses made after the initial deposit can often activate a casino online bonus offer, but the promotional cash and matching percentages are typically lower than welcome offers. In the case of welcome bonuses and reloads, cryptocurrency (Bitcoin, Ethereum, Dogecoin, etc.) usually rewards better across the board when compared to credit/debit (AmEx, Visa, Mastercard) and other cash deposits.
Refer-a-friend bonuses are also common and reward account holders who get a colleague to sign up for an account $100 or more. These referral promos can often be claimed an unlimited number of times and have reasonable completion terms attached.
Other online casino bonus codes can include free spins promotions attached to certain types of deposits, game-specific promos, and more. Casino site contests often reward in bonus cash as well when the entries are free.
Tips For How To Use Casino Bonuses
As we’ve already mentioned earlier, it is extremely important that players become familiar with how casino games repay bonus terms. Live dealer blackjack and roulette usually do not repay bonus conditions at all, but slots is a repayment-friendly game.
We normally suggest moderation and budget setting when gambling with your own money, but since the best online casino promotions require rollover, the bets need to be higher than usual. Members that don’t meet the conditions of the promotion must forfeit the cash and the winnings, so gamble heavily.
Make sure to keep track of your prepayment terms and the status of the bonus money. This can be done inside your account profile at any time.
How To Get An Online Casino Referral Bonus
Referring a friend can be lucrative, as all of the online casinos that we are members are offering bonus cash for the prospect. A custom URL can be created by any active member that can be sent to an associate for them to use to create an account.
When your friend joins up and deposits at least the minimum amount of money, you get a predetermined amount of money as a gift. These referral bonuses tend to increase when the friend uses cryptocurrency to make a deposit, so encourage them to do so and get paid for your efforts.
18+ Online Casino Bonus FAQs
Which online casino has the biggest welcome bonus?
Both Ignition Casino and Slots LV offer matching bonuses of $3,000 on the first deposit, which is tied for the highest among our favorite gambling sites for a single deposit. Bovada’s bonus amount reaches higher at $3,750, but those dollars are awarded over the first three deposits.
Can you withdraw casino bonuses?
Yes, but not unless all terms have been completed. Check the promo page at each site listed here for details on how to complete the terms of a casino bonus and withdraw the money.
Which casino gives welcome bonuses?
All of the 18-friendly online casinos that we recommend here offer new members a welcome bonus when they deposit for the first time.
Are there live dealer casino bonuses?
Live dealer blackjack and other games that connect members to human dealers using camera feeds are often ineligible for repaying casino bonus terms. Casinos do alter up their promotions often, so it is possible that a live dealer casino bonus could appear.