How Online Casinos Work

How Online Casinos Work

An online casino is a website that organizes gambling and provides its customers with access to slot machines, roulette, poker, and other gambling titles. Casinos almost never create games on their own, but only act as an intermediary between providers and customers. So, how do online casinos work in the USA, what types of gambling sites exist, and how to start playing on one of them? We will tell you in this article.

How Online Real Money Casinos Work

Unlike land-based gambling venues, online casinos do not own the games that are featured in their catalogs. Gambling websites enter into agreements with slot providers and place games on the website on mutually beneficial terms. The casino expands its range of games and, as a result, becomes more attractive to customers, while software developers increase their income.

All games that are available in online casinos are located on the developers’ servers, which makes it impossible for you or the casino to interfere with their work.

Online casinos work as organizers; that is, their main task is to provide a convenient and safe platform that contains hundreds and thousands of gambling games. In addition, the site assumes obligations for marketing and attracting new customers, supporting financial transactions, ensuring the personal and payment data security, as well as technical and information support.

How do licensed casinos work
To operate legally, casinos obtain a license. You can check its availability in the footer of the website.

The online casino goal, like any other business, is to make a profit. The house edge in all gambling games, which guarantees that the casino will stay in the black in the long run, ensures the income. In slots, the RTP (return-to-player percentage) realizes this advantage; in table and other games, there are special rules that create the house edge.

How Does Online Gambling Work

The principles of online gambling are practically the same as in brick-and-mortar gambling venues. The only significant difference is remote access to all games. To start playing, you do not need to visit the casino in person; just open the website in a browser, log in or sign up, and make a deposit. But there are a few more things you need to know before playing.

Responsible Gambling

Remember that gambling is entertainment and you should not take it as the main or additional source of income. Any bet you make, even if it seems the most reliable to you, can lead to a loss. Excessive gambling can cause an addiction to excitement; this is a dangerous mental disorder that consists of an irresistible craving for gambling and can lead to serious problems for you and your loved ones. To prevent this, follow a few simple recommendations:

  • Play only with the money that you can afford to lose without damaging your personal and family bankroll.
  • Do not borrow money, do not take out loans, and do not risk other people’s money.
  • Determine the amount after losing which you will stop the gambling session in advance, set limits.
  • Do not spend more time at the casino than you planned; take regular breaks.
  • Do not raise your bets or make repeated deposits in order to win back quickly.

If you feel that you have a gambling addiction, you can contact the support service; they will provide you with the contacts of specialized medical centers that help people with gambling addiction.

Also, the casino support can apply stricter deposit limits to your personal account, or temporarily block it at your request.

Random Number Generator

Online gambling casinos work is based on the random number generator which ensures unpredictable results and creates that excitement when you visit the casino. It determines which particular symbols appear on the reels of the slot machines, which cards you receive, what values of the dice appear on the table, and it does this in a fraction of a second after the start of the round.

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It is impossible to influence the results of the random number generator calculations or to predict them. To confirm its correctness, independent audit companies carry out evaluations and issue the appropriate certificates.


The casino is always in the black because of a small house edge in each game. In slots, it is provided due to the RTP criterion which shows how much money from the total investment will be returned to players in the form of payouts in the long run. The theoretical percentage of return is always below 100%, and this allows the gambling site to make a profit regardless of the results of individual customers.

Basic Information About Online Casinos

Since online casinos work on the Internet, access to its gaming capabilities is open to every player who meets several requirements. These are a territorial restriction and an age requirement. In the US, the minimum gambling age is 18 or 21, depending on the state.

You can find territorial restrictions in the rules of a particular site. If you meet these requirements, you only need to complete a few steps to start the game.

Choose a Casino

The first and most important step is the choice of an online casino; the experience that you will get depends on this directly. Register only in the best licensed casinos in the USA approved by local regulatory commissions. You can find a list of these gambling sites in one of the ratings compiled by in-house experts.


When you select a gambling site, open it in your browser and create an account. To do this, press the Sign Up button and enter your contacts and personal information. Use only reliable information to avoid problems with verification in the future.

How does the demo version of a slot work
Without registration, you can only play in demo mode with bets on virtual chips

You can only have one account in an online casino; re-registration is considered a violation of one of the basic rules of any site and leads to a ban.

How to Deposit at Casinos

The next step is making a deposit. To start playing, you should have at least a minimum amount of funds on your bankroll. To make a deposit at the online casino, you need to follow a few steps:

  1. Log in
  2. Open the Cashier section
  3. Select the Deposit tab
  4. Specify a payment system
  5. Fill out the empty fields
  6. Confirm the transaction

The deposit is credited to the bankroll instantly; the money becomes available for the game in a few seconds.

Use Bonuses

To make your game more profitable, you can activate various bonuses that are available on almost every gambling site. They will allow you to receive extra money and free spins at different stages of the game.

Bonus TypeDescription
Sign-Up BonusThis is the bonus for creating an account, which is credited to the bankroll immediately after your registration or verification. The casino gives you a small amount of funds and free spins, so you can start playing without investing.
Welcome BonusThis is the starting bonus for newbies, which allows you to increase the amount of your one or more first deposits. The gambling site gives you a certain percentage in addition to your deposit; usually, it is 100%. You can also get free spins.
ReloadThis is the promotion for regular players, which activation occurs when you make repeated deposits. An additional percentage of the amount and free spins are also available there, but the deposit does not have to be the first.
CashbackThis is the compensation for part of the lost funds on bad days, weeks, and months, as a result of which you remained in the red.

You can also get bonuses for success in the loyalty program, when your account status is increased, or for making a certain turnover of bets.

In addition to the basic conditions for activating the promotion, you may additionally need to activate a promo code. You have to specify it in the appropriate field when creating an account, at the Cashier section when making a deposit, or in the Personal account settings.

Online gambling casino work is carried out in such a way that most bonuses require wagering; you cannot immediately withdraw the funds you received after the activation of a promotion or the use of free spins. First, you need to fulfill several requirements, the main of which is to make a turnover of bets which amount is determined by the wagering coefficient.

Choose a Game & Play

When the money is on your bankroll, you can go to the catalog and run one of the games. There are several especially popular categories of gambling titles; in most cases, they have their own sections in the casino catalog.


This is the most extensive gambling category, that includes slot machines from dozens and hundreds of providers. Each of them works on the basis of a random number generator and does not require any special knowledge or skills from you to start playing. At the same time, all slots have different sets of mechanics and functions, different RTP and volatility, bet limits and maximum payouts, so they differ from each other.


You can play poker against the computer or the live dealer. Your main task is to collect the strongest possible combination of the received cards. The fight can be for the pot if you have an opponent, or you get payouts with fixed odds for each combination if you are playing video poker.


Try to beat the dealer in this popular card game by scoring more points than them or by waiting for the dealer to bust. You can play blackjack with multiple hands at the same time.

Live Dealer

If you are not interested in playing slot machines or table games against the computer, you can visit the Live section where games with live dealers are available. The game is streamed live directly from a provider’s equipped studio.

Games with live dealers
The lobby can include games from individual providers

In games with live dealers, the influence of the random number generator on the result can be reduced or eliminated; thus, everything depends on luck and your personal skill.

Different Types of Online Casinos

An online casino always strives to attract as many customers as possible; therefore, you have various ways to interact with the gambling site. So, how does online casino gambling work in the USA?


In this case, you need to download the casino client to a desktop PC or a laptop, or a separate mobile app for Android and iOS. Download the software to your device and install it.

Browser Casinos

The vast majority of casinos have their own websites, due to which you can access all the gaming features right in your browser. Just open the URL address of the gambling site, and you can start playing.


The amount of mobile users is increasing every year; to attract them, online casinos develop full-fledged apps, as well as responsive designs for their websites, due to which their interface automatically adjusts to the screen size of a smartphone or tablet.

Online Casinos vs Traditional Gambling Casinos

Online CasinosLand-based Casinos
Wider selection of gambling titlesUnique atmosphere and more positive experiences
Quick access to all gaming featuresMost casinos offer multi-million dollar jackpots
A large number of bonuses, tournaments, and promotionsLand-based gambling venues always operate under a valid license

Legality of Online Casino Gambling

Online real money casinos work has to be approved by the license of a state where they conduct gambling. Without this requirement, the gambling site is considered illegal, and playing there t is not recommended. The organization of gambling entertainment is not allowed throughout the country, but the industry is gradually becoming legal.

Before you start playing, be sure to check your local gambling legislation and make sure that online gambling is allowed in your state.


In practice, they can; however, in this case their activity is illegal, and registration on this gambling site can lead to loss of money and deception on the part of a casino.

Yes, but you can have no more than one account on each of them, since re-registration is prohibited by the rules.

No. You can use the same account to play in the desktop and mobile versions of the casino; separate registration is not required.

Do not create a new account under any circumstances, as this will lead to blocking you. Reset your password instead; the button to start this procedure is available in the authorization form.

Yes, but not all of them. You can check out what payment systems are available at the casino in the rules section or ask this information at the support service.

Publication Author
Donald Peterson
Author of articles
Donald Peterson is an avid gambler from Edmonton, Alberta, who also writes about his experience with casinos. He’s been in the business for over 10 years, following the ever-changing industry landscape. His articles are aimed at helping beginners with choosing casinos, suitable games, and strategies.
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