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May 5, 2026
Written by Oliver, Casino & Sportsbook Specialist
A welcome bonus is the first thing most new players encounter when signing up to an online casino, and it is also one of the most misunderstood. The headline figures are designed to attract attention. The terms attached to them are where the real story lives.
This guide explains exactly how welcome bonuses work, what the different types are, which terms matter most, and how to work out whether a bonus is actually worth taking before you claim it.
A welcome bonus is a promotional offer made to new players when they register and make their first deposit at an online casino. It is the casino's way of competing for your business in a crowded market, and the structure of the offer is designed to look as attractive as possible while protecting the casino's margin.
Welcome bonuses are one-time offers. Once you have claimed a welcome bonus at a casino, you cannot claim it again. Some casinos split their welcome offer across your first two or three deposits rather than offering everything upfront, which is worth checking before you sign up.
The most common type. The casino matches your first deposit by a set percentage up to a maximum amount. A 100% match bonus up to £200 means that if you deposit £200, the casino adds another £200 in bonus funds to your account, giving you £400 to play with in total.
The match percentage can be higher than 100%. A 200% bonus up to £100 would give you £300 total on a £100 deposit. A higher percentage does not automatically mean a better deal, because the wagering requirements attached to larger bonuses are often proportionally higher.
A no deposit bonus gives you a small amount of bonus funds or free spins without requiring any deposit at all. These are the most generous-looking offers in casino marketing and the least valuable in practice.
No deposit bonuses almost always come with high wagering requirements, very low maximum cashout limits, and restricted game eligibility. They are useful for trying a casino without financial risk, but they should not be the primary reason you choose one casino over another.
Some casinos offer free spins instead of or alongside a deposit match. These are spins on a specific slot, credited either on registration or on your first deposit. The value of a free spins package depends entirely on the stake per spin and the wagering requirement on any winnings.
A package of 100 free spins sounds substantial. If each spin is worth £0.10 and winnings are subject to a 40x wagering requirement, the real value is considerably smaller than it appears.
Many casinos offer a combination of a deposit match and free spins as a single welcome package. For example, a 100% match up to £100 plus 50 free spins. Each component typically has its own set of terms, so read them separately rather than treating the package as a single offer.
The headline figure tells you nothing on its own. The number that determines the real value of a welcome bonus is the wagering requirement.
The wagering requirement tells you how many times you must bet the bonus amount before any winnings become withdrawable. Here is how to calculate what that means in practice:
Bonus amount x wagering requirement = total amount you must wager
An example:
Some casinos apply the wagering requirement to the combined deposit and bonus amount rather than the bonus alone. This makes the requirement significantly more demanding. Always check which figure the multiplier applies to.
At the same time, bear in mind that the house edge works against you while you are clearing the wagering requirement. On a slot with a 96% RTP, you will lose an average of 4 cents per pound wagered. On £3,000 of wagering, that is approximately £120 in expected losses before you can withdraw anything. The bonus needs to produce enough winning variance above that baseline for the offer to be worth claiming.
Beyond the wagering requirement, several other terms determine how useful a welcome bonus actually is.
Not all games contribute equally toward the wagering requirement. Most casinos apply a contribution weighting by game type:
This means that if you prefer table games or live casino, a bonus with standard contribution rules is almost entirely unavailable to you in practice. You would need to wager ten times as much on live casino games to clear the same requirement that slot players clear with standard play.
Always check game contributions before accepting a bonus if you intend to play anything other than slots.
Almost every bonus comes with a maximum bet limit that applies while you are clearing the wagering requirement. This is typically between £3 and £5 per spin or per hand. Exceeding this limit, even once, can result in the casino voiding your bonus and any winnings accumulated from it.
This rule is enforced strictly at most casinos. If you are clearing a bonus and want to increase your stake above the limit, you need to either forfeit the bonus first or complete the wagering requirement before doing so.
Bonuses and free spins expire. The wagering requirement must be completed within the stated timeframe or the bonus is forfeited. Expiry windows range from 24 hours for some free spins to 30 days for deposit match bonuses, with most falling somewhere between 7 and 21 days.
Before claiming a bonus, estimate whether the wagering requirement is realistic within the expiry window given the stake levels you normally play at. A 40x wagering requirement on a £200 bonus means £8,000 of required wagering. At £1 per spin on a slot running at roughly 500 spins per hour, that is approximately 16 hours of play within the expiry window. For most players, that is achievable over a couple of weeks but tight within 7 days.
Many bonuses, particularly no deposit bonuses and free spins, cap how much you can withdraw from any winnings generated. A free spins bonus with a £50 maximum cashout means that even if you generate £500 in winnings, you can only withdraw £50.
For deposit match bonuses the maximum cashout is less common but still worth checking, particularly on larger match percentages where the casino is taking on more risk.
Some welcome bonuses restrict which games you can play with bonus funds, not just which games count toward wagering. If the bonus is specifically a slots bonus, attempting to play live casino with bonus funds may result in the bonus being voided even if live casino games are allowed for wagering purposes elsewhere.
Read the eligible games section separately from the contribution percentages. They answer different questions.
This distinction is important and often not clearly explained in casino marketing.
A non-sticky bonus keeps your deposit and bonus funds in separate pots. You can withdraw your deposit at any time without forfeiting the bonus, which remains in your account for you to wager separately. This is the more player-friendly structure.
A sticky bonus merges your deposit and bonus funds into a single balance. You cannot withdraw your deposit without also withdrawing the bonus, which triggers forfeiture of the bonus portion. The entire combined balance is subject to the wagering requirement before any part of it can be withdrawn.
If a casino does not specify which type their bonus is, check the terms for language about withdrawing your deposit during wagering. If it mentions that withdrawing will forfeit the bonus, it is sticky.
We cover both types in detail in our dedicated guides to sticky bonuses and non-sticky bonuses.
A small number of casinos offer welcome bonuses with no wagering requirement at all, meaning any winnings generated from bonus play are immediately withdrawable as cash.
These exist and are genuinely what they claim to be, but they are structured differently from standard welcome bonuses. The bonus amount is typically smaller, the eligible games may be restricted, and the casino recalibrates its overall offer to account for the absence of wagering protection.
A no wagering bonus of £20 with no restrictions is worth considerably more in real terms than a £100 bonus with a 35x wagering requirement, even though the headline figure is five times larger. If you find a no wagering welcome offer at a casino that otherwise meets your criteria, it is usually the better deal.
When we review a casino's welcome bonus, we look at the following in order:
Wagering requirement: Our threshold for a reasonable bonus is 30x or below applied to the bonus amount only. Between 30x and 40x is acceptable but not competitive. Above 40x is difficult to clear and significantly erodes the bonus value.
Game contributions: A bonus that excludes live casino and table games is only useful to slot players. We flag this clearly in every review.
Maximum bet during wagering: We check whether the limit is reasonable and note casinos where the limit is set unusually low relative to the minimum stake on popular games.
Expiry: We flag bonuses with expiry windows shorter than 14 days as a potential issue for players who cannot play frequently.
Bonus type: We identify whether a bonus is sticky or non-sticky and explain the practical implications.
Terms clarity: Legitimate casinos write bonus terms that are specific and unambiguous. We treat vague or deliberately complex terms as a red flag regardless of how attractive the headline offer looks.
Claiming the bonus before reading the terms. Most casinos do not allow you to un-claim a bonus once it has been activated. If the terms are worse than expected, you may be stuck with them.
Using a payment method that makes you ineligible. Many casinos exclude certain payment methods from bonus eligibility, most commonly Skrill and Neteller. If you deposit via an excluded method, you will not receive the bonus and may not be informed of this clearly at the time of deposit.
Exceeding the maximum bet limit. As covered above, this can void the entire bonus including any accumulated winnings. Set a reminder or sticky note for yourself with the maximum bet limit before you start playing.
Ignoring the game contribution rules. Playing live blackjack at 10% contribution when you intended to clear the bonus efficiently via slots is a common and easily avoided mistake.
Treating the bonus as found money. A welcome bonus is not free cash. It is a conditional offer that requires you to wager your own money to unlock it. Factor the expected wagering losses into your assessment of whether the bonus is worth claiming.
Not always, and it is worth being honest about this.
If you intend to deposit, play for a while, and withdraw, a bonus with a significant wagering requirement may actually work against you. It ties up your balance, restricts your bet sizes, and means you need to wager far more than you would have played anyway before you can cash out.
If you prefer table games or live casino, most welcome bonuses offer you very little because of game contribution restrictions.
If you plan to play primarily slots at stakes well within the maximum bet limit and you have enough time to clear the wagering requirement comfortably within the expiry window, a well-structured welcome bonus can add genuine value to your session.
The honest answer is that the best welcome bonus is the one at the casino you would choose to play at anyway, with terms you have read and understood before claiming.
Can I withdraw a welcome bonus immediately?
No. All welcome bonuses with wagering requirements must have those requirements cleared before any bonus winnings can be withdrawn. Your original deposit is typically withdrawable at any time on a non-sticky bonus, but withdrawing it will usually forfeit the bonus.
What happens if I win big during wagering?
Your winnings accumulate in your balance as you wager. Once the wagering requirement is complete, the full balance including any winnings becomes withdrawable, subject to any maximum cashout limit that applies.
Can I claim welcome bonuses at multiple casinos?
Yes. Each casino's welcome bonus is independent of every other casino. There is nothing preventing you from signing up at several casinos and claiming a welcome bonus at each one, provided you meet the eligibility criteria at each.
Why do some casinos exclude Skrill and Neteller from bonus eligibility?
Skrill and Neteller have historically been associated with bonus abuse patterns where players move funds quickly between accounts to exploit offers. Casinos exclude these methods to limit that risk. If you want to claim a bonus, check the eligible payment methods before depositing.
What is the difference between a welcome bonus and a reload bonus?
A welcome bonus is available once, to new players only. A reload bonus is a recurring offer for existing players making subsequent deposits. Reload bonuses typically have lower match percentages and are offered weekly or monthly as a retention tool.
Is a bigger welcome bonus always better?
No. A larger bonus almost always comes with a higher wagering requirement or more restrictive terms. Evaluate the full set of conditions rather than the headline figure.
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