Casino bonuses: how they work and what the terms mean
Stoopid Pigeon Editorial· · 10 min read
A casino bonus looks like free money, and that's exactly how it's meant to look. In reality it's a marketing cost the operator pays to bring players in — and it almost always comes wrapped in conditions that decide whether any of it ever turns into cash you can withdraw. The headline number ("100% up to £100!") is the easy part. The terms underneath it are where the offer actually lives.
This guide explains what a casino bonus really is, the main types you’ll run into, and — in detail — the rules that govern them: wagering requirements, game weighting, max-bet limits, win caps, and expiry. No hype, no promises of profit. Just a clear-eyed look at how bonuses work so the fine print stops being a surprise.
What a casino bonus actually is
A casino bonus is promotional credit — money or free spins an operator adds to your account to encourage you to play. From the operator’s side it’s an advertising expense, no different in spirit to a discount code in retail. The point is to get players signing up and staying active, and the maths is built so that, on average across all the players who claim it, the casino still comes out ahead.
That last part is the whole reason the conditions exist. If a casino simply handed over £100 with no strings, players would deposit, claim, and withdraw immediately — and the promotion would lose money instantly. So bonuses carry strings: rules you must satisfy before any bonus-derived winnings can be withdrawn. Understanding those strings is the difference between a bonus that’s genuinely worth claiming and one that’s effectively impossible to clear.
If you’re new to how casino maths works in general, the Casino Insights section covers the wider floor, and our broader guides collection is a gentler starting point.
The main types of bonus
Operators use a handful of recurring bonus structures. The names vary, but the mechanics usually fall into these categories:
- Welcome / match bonus. The most common. The casino matches a percentage of your first deposit — “100% up to £100” means deposit £100 and receive £100 in bonus funds. Match percentage and cap vary widely by operator.
- No-deposit bonus. A small amount of bonus credit (or a handful of spins) given just for registering, with no deposit required. Because there’s no deposit, these typically carry the strictest terms — high wagering requirements and low win caps — since the operator is funding it entirely.
- Free spins. Pre-paid spins on specific slot games, often bundled with a deposit offer. Winnings from free spins are usually credited as bonus funds and subject to wagering, not paid as cash.
- Reload bonus. A match bonus on a later deposit, not just the first — used to keep existing players topping up.
- Cashback. A percentage of net losses returned over a set period. Sometimes paid as cash, sometimes as bonus funds with their own conditions.
- Loyalty / VIP. Ongoing rewards — points, tiered perks, occasional bonus credit — for regular play. Structures vary enormously and the headline perks often matter less than the wagering terms attached.
Each of these can behave very differently once you read the terms. A generous-looking match with a steep wagering requirement can be worse value than a smaller bonus with fair conditions.
Wagering requirements, explained
This is the single most important term in any bonus, and the one most often misunderstood. A wagering requirement (also called a “playthrough” or “rollover”) is the total amount you must bet before bonus funds — and any winnings from them — become withdrawable. It’s expressed as a multiplier, like 35x.
The multiplier tells you what to multiply, and that’s where people trip up. There are two common bases:
Bonus only. The requirement applies to the bonus amount alone.
A £100 bonus with a 35x requirement = £100 × 35 = £3,500 must be wagered before you can withdraw.
Deposit + bonus. The requirement applies to your deposit and the bonus combined — far more demanding.
A £100 deposit matched by a £100 bonus, at 35x on deposit + bonus = (£100 + £100) × 35 = £7,000 must be wagered.
Same headline “35x,” double the actual playthrough. This is why the base matters as much as the multiplier, and why it’s the first thing to check in the terms.
The practical takeaway: a low multiplier on a “deposit + bonus” base can be harder to clear than a higher multiplier on a “bonus only” base. Do the arithmetic before assuming the bigger headline number is the better deal.
Game weighting — why your bets don’t all count the same
You might assume that every £1 you bet ticks £1 off your wagering requirement. It usually doesn’t. Most bonuses apply game weighting: different games contribute different percentages of each bet toward the requirement.
- Slots typically count 100%. A £1 slot spin reduces a £3,500 requirement by £1.
- Table games and live-dealer games often count 10–20%, or are excluded entirely. At 10% weighting, a £1 bet only knocks £0.10 off the requirement — meaning you’d have to wager ten times as much to clear the bonus playing those games.
There’s a deliberate reason for this, and it ties directly to the house edge. Low-edge games like blackjack and baccarat cost the casino very little when you win, so letting players clear bonuses on them would be expensive for the operator. That’s exactly why these games are so often under-weighted or excluded from wagering requirements. As our baccarat tips guide explains, baccarat’s banker bet carries one of the lowest house edges anywhere on the floor — which is precisely the property that makes bonuses shy away from it.
At 10% weighting a £1 table-game bet counts as just £0.10 toward your requirement — so clearing a £3,500 playthrough on table games alone would mean wagering around £35,000. Slots at 100% would need £3,500. Same bonus, a tenfold difference in how much you have to bet.
The contrast between high-weighted slots and low-weighted table games is one of the clearest examples of how casino maths shapes the rules. Our piece on table games versus slot games digs into why the two categories behave so differently.
Max bet while a bonus is active
Most bonuses cap how much you can stake on a single bet while wagering requirements are outstanding — commonly something like £5 per spin or hand. Exceed it, even once, and many operators void the bonus and any winnings derived from it.
The reason is straightforward: it stops players placing one or two large bets to “gamble through” the requirement quickly, which would undermine the slow grind the terms are designed to enforce. The cap is easy to breach by accident, especially with features like “bet max” buttons on slots, so it’s worth knowing the limit before you start.
Max cashout and win caps
Some bonuses — especially no-deposit offers — limit how much you can actually withdraw from bonus winnings, regardless of how much you win. A win cap might say that bonus-derived winnings are capped at, say, a fixed amount or a multiple of the bonus, with anything above that forfeited when you withdraw.
This is the term that most often turns a “big win on a free bonus” into a small payout. A no-deposit bonus that produces a large win on paper may pay out only a capped fraction of it. Win caps vary by operator and are usually spelled out alongside the wagering requirement — they’re not always prominent, so look for them.
Time limits and expiry
Bonuses don’t last forever. Terms typically set a window — a number of days from claiming — within which the wagering requirement must be completed. Miss the deadline and the bonus, plus any winnings still tied to it, is usually removed.
Shorter windows make steep requirements much harder to clear at a sensible pace, because the only way to finish a large playthrough in a few days is to bet far more, far faster, than you might want to. A high requirement on a short timer is one of the least player-friendly combinations, even if the headline offer looks generous.
Sticky vs non-sticky bonuses
Bonuses fall into two broad structures that determine what happens to the bonus funds themselves:
- Sticky (non-withdrawable) bonus. The bonus amount can be wagered but never withdrawn. You can keep winnings generated from it (subject to the other terms), but the bonus stake itself is removed when you cash out. It’s there to play with, not to keep.
- Non-sticky bonus. Your deposit and the bonus are treated more separately. In some structures you can withdraw your own deposited funds without triggering the loss of the bonus, with the bonus only coming into play once your own money is spent.
Non-sticky structures are generally more player-friendly, but the labels aren’t standardised across operators — what matters is what the terms actually say happens to your funds when you withdraw, not the name used.
Wagering on bonus vs deposit + bonus
It’s worth restating, because it’s the most consequential single detail: whether the wagering multiplier applies to the bonus only or to deposit + bonus can double the real requirement, as the worked example above showed. A “20x” requirement on deposit + bonus can be a tougher clear than a “35x” requirement on bonus only.
When comparing two offers, convert both to the total amount you’d actually have to wager. That single figure — not the multiplier, not the headline match — is the honest measure of how demanding a bonus is.
How to actually read the terms and conditions
Bonus terms are long, but the parts that decide whether an offer is worth it are few. When reading them, find the answers to these specific questions:
- What’s the wagering multiplier, and what does it apply to — bonus only, or deposit + bonus?
- What’s the game weighting — which games count 100%, which are reduced, which are excluded?
- Is there a max bet while wagering is active, and what is it?
- Is there a win cap or max cashout on bonus winnings?
- What’s the expiry window for completing the requirement?
- Is the bonus sticky or non-sticky — what happens to the funds when you withdraw?
- Are there minimum-deposit or excluded-payment-method conditions that affect eligibility?
If any of those answers is missing or unclear, treat that as a reason for caution rather than an oversight. A fair offer states its terms plainly.
A note on responsible play
A bonus changes the maths of an offer, but it doesn’t change the fundamental fact that casino games are built with a house edge — over time, the games are designed to make money for the operator, not the player. A bonus can extend playing time or soften variance, but no bonus turns a negative-edge game into a reliable way to profit.
Treat any deposit, with or without a bonus, as money set aside for entertainment that you’re prepared to lose. Set limits in advance, and if gambling stops being fun, most jurisdictions provide free support services and self-exclusion tools. The bonus is a marketing tool, not a strategy.
Quick-reference checklist
Before claiming any bonus, run through this:
- Multiplier and base — work out the total you’d actually have to wager (bonus only vs deposit + bonus).
- Game weighting — know which games count 100% and which are reduced or excluded.
- Max bet — note the per-bet cap (commonly around £5) and don’t breach it.
- Win cap — check whether withdrawals from bonus winnings are limited.
- Expiry — confirm the window for completing the wagering.
- Sticky or not — understand what happens to the funds when you withdraw.
- Convert to one number — the total stake required is the honest measure of any offer.
A bonus is worth claiming when those terms are clear and reasonable — and worth skipping when the playthrough, the weighting, or the caps quietly make it impossible to benefit from. The same clear-eyed approach applies whether you favour the table games, prefer online poker, or simply enjoy a trip to a land-based casino.
Frequently asked questions
What is a casino bonus?
It's promotional credit — bonus funds or free spins — that an operator adds to your account to encourage play. From the casino's side it's a marketing cost, and it comes with conditions you must meet before any bonus-derived winnings can be withdrawn.
What is a wagering requirement?
It's the total amount you must bet before bonus funds and their winnings become withdrawable, expressed as a multiplier such as 35x. A £100 bonus at 35x means £3,500 must be wagered first.
What does 35x actually mean in money?
It depends on the base. On a bonus-only basis, a £100 bonus at 35x means £100 × 35 = £3,500 to wager. On a deposit + bonus basis (£100 deposit + £100 bonus), it would be £200 × 35 = £7,000 — the same headline number, double the playthrough.
Why don't all my bets count toward the requirement?
Because of game weighting. Slots typically count 100%, while table games and live-dealer games often count just 10–20% or are excluded. At 10% weighting, a £1 bet only reduces the requirement by £0.10.
Why are blackjack and baccarat often excluded from bonuses?
Because their house edge is so low. Low-edge games cost the casino little when players win, so allowing bonuses to be cleared on them would be expensive for the operator. That's why these games are commonly under-weighted or excluded from wagering requirements.
What is a no-deposit bonus?
A small amount of bonus credit or free spins given just for registering, with no deposit needed. Because the operator funds it entirely, these typically carry the strictest terms — high wagering requirements and low win caps.
What are free spins?
Pre-paid spins on specific slots, often bundled with a deposit offer. Winnings are usually credited as bonus funds subject to wagering rather than paid out as cash.
What is a max-bet rule?
A cap on how much you can stake on a single bet while wagering requirements are active — commonly something like £5 per spin or hand. Exceeding it, even once, can void the bonus and any winnings from it.
What is a win cap or max cashout?
A limit on how much you can withdraw from bonus winnings, regardless of how much you win. It's most common on no-deposit bonuses and can turn a large on-paper win into a small actual payout.
How long do I have to clear a bonus?
Bonuses set an expiry window — a number of days from claiming — to complete the wagering requirement. Miss it and the bonus, plus any winnings still tied to it, is usually removed.
What's the difference between sticky and non-sticky bonuses?
A sticky (non-withdrawable) bonus can be played but never withdrawn — you keep winnings from it, but not the bonus stake itself. A non-sticky bonus treats your deposit more separately, sometimes letting you withdraw your own funds without losing the bonus.
Does the wagering apply to my deposit too?
Sometimes. Check whether the multiplier applies to the bonus only or to deposit + bonus. The deposit + bonus base roughly doubles the real requirement for a match offer, so it matters as much as the multiplier itself.
Can I withdraw a bonus straight away?
No. Bonus funds and their winnings only become withdrawable once the wagering requirement is met, within the time limit, and subject to any win cap. Withdrawing before that usually forfeits the bonus.
Are bigger bonuses always better value?
Not necessarily. A large headline match with a steep requirement, a short expiry or a low win cap can be worse value than a smaller bonus with fair terms. Convert each offer to the total stake required to compare them honestly.
Can a bonus make a casino game profitable?
No. Casino games carry a house edge designed to favour the operator over time. A bonus can extend play or soften variance, but it doesn't turn a negative-edge game into a reliable way to profit.
What should I check before claiming a bonus?
The wagering multiplier and its base, game weighting, any max-bet limit, win caps, the expiry window, and whether the bonus is sticky. If any of these is unclear in the terms, treat that as a reason for caution.