The wagering requirement is the number of times you have to bet through a bonus before you can withdraw anything from it. The multiplier is the obvious part, the big number the marketing team prints on the banner. The less obvious part, and the part that actually decides whether an offer is fair or a trap, is everything around that number: the basis it applies to, the games that count towards it, the cap on your bets while you clear it, the ceiling on what you can eventually take out, and the clock ticking on all of it. Learn to read those together and you stop being impressed by headline percentages. You start being able to tell, quickly and reliably, whether a bonus is a genuine advantage or a way to keep your deposit on the site for longer.
This guide walks through every moving part with worked arithmetic, because wagering is a numbers problem and vague reassurance helps nobody. By the end you should be able to open any casino's bonus terms, find five numbers, do two quick sums in your head, and decide. If you would rather skip the whole exercise, our page on no-wagering casinos lists operators whose bonuses carry no playthrough at all, which sidesteps most of what follows.
What a wagering requirement is and is not
A wagering requirement, also called playthrough or rollover, is a total stakes target. When an operator says 35x, it means the sum of all your bets must reach 35 times a reference amount before the bonus and its winnings become real, withdrawable money.
The single most common misunderstanding is that you must spend or lose that amount. You do not. Wagering counts the size of your bets, not your net losses. If you stake GBP1 on a slot spin and it returns GBP0.90, you have contributed GBP1 towards wagering and you still have GBP0.90 to stake again. That GBP0.90 counts again when you bet it. Money recirculates. The practical consequence is that the house edge, not the wagering total, determines how much you can expect to lose while clearing a bonus.
Here is the useful way to think about the real cost. Suppose you must wager GBP3,500 on slots with a typical return to player of around 96%, which implies a house edge of about 4%. The expected loss across GBP3,500 of total stakes is roughly 4% of GBP3,500, which is about GBP140. That is the true, average price of clearing the bonus, not the GBP3,500 figure itself. Variance means any individual run can be far better or far worse, but the expected cost is the number that matters when you decide whether a bonus is worth the effort.
So the mental model is: wagering is a volume of bets you must push through, the house edge quietly taxes that volume, and the bonus is worth taking only if its value exceeds that tax plus the risk of the traps described below.
The two wagering bases: bonus-only versus deposit plus bonus
This is the distinction that separates a fair offer from a poor one, and it is the first thing to check on any welcome match.
Bonus-only wagering. A 100% match up to GBP100 at 30x on the bonus means the 30x applies to the GBP100 bonus alone. You must wager GBP100 times 30, which is GBP3,000, before the bonus clears. Your GBP100 deposit is untouched by the requirement. It remains real cash you can withdraw at any point.
Deposit-plus-bonus wagering. Same headline, same 30x, but now the multiplier applies to your deposit and the bonus combined, that is GBP200. You must wager GBP200 times 30, which is GBP6,000. That is exactly double the volume, so roughly double the expected loss, and typically your deposit is locked until the wagering is done.
Two casinos can advertise the identical phrase, 100% up to GBP100 at 30x, and one is offering a deal twice as demanding as the other. The word to hunt for in the terms is whether the multiplier is defined against the bonus or against the deposit and bonus. A slightly higher multiplier on a bonus-only basis frequently beats a lower multiplier on a deposit-plus-bonus basis.
A quick comparison makes the point. Offer A is 100% up to GBP100 at 40x bonus-only, giving GBP4,000 to wager. Offer B is 100% up to GBP100 at 25x deposit plus bonus, giving GBP200 times 25, which is GBP5,000 to wager. Offer B has the friendlier headline number, 25x versus 40x, yet it demands GBP1,000 more total stakes. If you only read the multiplier, you would pick the worse deal. This is why the basis belongs in the same glance as the number.
Game contribution rates and how they change everything
Not every game clears wagering at the same speed. Each game type carries a contribution rate, the percentage of each bet that counts towards your requirement. Typical rates look like this:
- Slots: 100%. Every GBP1 staked clears GBP1 of wagering.
- Roulette: often 10% to 20%, sometimes zero on even-money bets.
- Blackjack: often 10%, sometimes 20%, sometimes excluded.
- Video poker: commonly 10% to 20%.
- Live dealer games: frequently excluded entirely.
The reason is house edge. Slots carry a comparatively high edge for the casino, so operators are happy to let them clear wagering fully. Blackjack played well has a very low edge, so counting it fully would let sharp players clear bonuses at almost no expected cost. Contribution rates are the operator's way of protecting the maths.
The effect on the true requirement is large. Consider a 30x bonus on GBP100, so GBP3,000 of wagering. If you clear it on slots at 100% contribution, you stake GBP3,000. If you try to clear it on blackjack contributing 10%, every GBP1 you bet counts as GBP0.10, so you must stake GBP30,000 of blackjack to clear the same GBP3,000 requirement. The nominal 30x becomes an effective 300x for that game.
Computing effective wagering when contribution is below 100%
The formula is simple. Divide the wagering total by the contribution rate expressed as a decimal.
Worked example one. A 35x bonus on a GBP80 bonus is GBP2,800 of wagering. On roulette at 20% contribution, the real stake volume is GBP2,800 divided by 0.20, which is GBP14,000. On slots at 100%, it is GBP2,800. The same bonus is five times harder to clear on roulette.
Worked example two. Compare a 25x slots bonus against a 40x bonus that lets blackjack contribute 20%. The 25x slots bonus on GBP100 is GBP2,500 of slot stakes. The 40x bonus is GBP4,000 of wagering, but at 20% blackjack contribution the effective blackjack volume is GBP4,000 divided by 0.20, which is GBP20,000. For a blackjack player the 25x slots bonus is not comparable, it is a different universe of effort. The lesson is that you must run the contribution maths for the games you personally play, not the games the headline assumes.
One further trap lives here. Some operators specify that if you place any bet on an excluded or low-contribution game while a bonus is active, they may void the bonus, not merely decline to count the stake. Read whether low-contribution games are allowed but slow, or forbidden outright. The two are very different risks.
The maximum bet while wagering
Almost every bonus limits the largest single bet you may place while a wagering requirement is active, commonly GBP5 or EUR5 per spin or hand. Exceed it, even once, even by accident, and most operators will void the bonus and every penny of winnings derived from it. Enforcement is automatic and appeals rarely succeed.
This rule exists to stop players staking their whole balance on one high-variance bet to blitz the wagering. From the player's side it is the single most common reason a withdrawal gets refused, so it deserves genuine care. The safe practice is to set your stake below the cap at the start of a bonus session and never touch it until the bonus has fully cleared.
The trap versions are worth naming. Some operators set the cap unusually low, at GBP2 rather than GBP5, which lengthens the grind and increases the chance of an accidental breach. Others express the cap as a percentage of the bonus, for example 10% of the bonus per bet, which quietly shrinks as your bonus balance falls. A few also count bonus-buy or feature-buy purchases on slots as a breach, so if a slot lets you buy a bonus round for 100 times your stake, that purchase can exceed the max bet and void everything. If in doubt, avoid feature buys entirely while wagering.
Maximum cashout caps
Some bonuses limit the most you can withdraw from them, regardless of how much you actually win. The cap is usually expressed as a multiple of the bonus or the deposit.
Worked example. A GBP50 no-deposit-style bonus with a 5x cashout cap means that no matter how lucky you get, you can withdraw at most GBP250 of winnings. Turn GBP50 into GBP4,000 and you still take home GBP250, with the remainder forfeited on withdrawal. A 10x cap on the same bonus lets you keep up to GBP500.
Cashout caps are common on no-deposit bonuses, free-spin offers and cashback promotions, where the operator is giving you money at no cost to yourself and limits its downside. They are much less common on straightforward welcome-deposit matches, where you have put your own money in. When a cap is present, it is often the number that most limits the bonus's real value, because it caps the upside you were playing for. Always check whether the cap is per bonus, per day or per offer, and whether it applies to the whole balance or only to bonus-derived winnings.
Expiry windows and the pace they force
A wagering requirement always comes with a clock. When it runs out, the unwagered bonus and any winnings attached to it are removed. The expiry window turns an abstract total into a required daily pace.
Worked example. A 40x bonus on EUR200 is EUR8,000 of wagering. Over a 7-day expiry that is roughly EUR1,143 of stakes every day for a week. Over a 30-day expiry the same total is about EUR267 a day, a far more comfortable pace. Identical wagering totals, wildly different demands, purely because of the clock.
Short expiry windows are the softest form of unfair term because they are easy to overlook and easy for the operator to enforce without any dispute. Before opting in, divide the wagering total by the number of days in the window and ask honestly whether that daily stake volume fits how you actually play. If it does not, the bonus will expire part-cleared and you will have gained nothing while exposing yourself to the house edge on every bet you did place.
Sticky versus non-sticky bonuses
This distinction governs what happens to the bonus money itself once you meet the requirement, and it changes the whole character of an offer.
Non-sticky bonuses. The bonus is added to your balance and, once wagering is met, it converts to cash you can withdraw along with your winnings. This is the friendly form. Many non-sticky offers also let you withdraw at any time before completing wagering, in which case you forfeit the unearned bonus but keep your own deposit and real winnings. That flexibility is valuable.
Sticky bonuses. The bonus is play-only and can never be withdrawn. You can win with it, but when you cash out, the original bonus amount is stripped from your balance and only your winnings above it come through. A GBP100 sticky bonus that you turn into GBP180 pays out GBP80, because the GBP100 stays behind. Sticky bonuses are common on no-deposit and reload offers. They are not inherently a scam, but you must understand that the headline figure is working capital you borrow, not money you keep.
A phased or semi-sticky variant exists too, where the bonus is sticky until wagering completes and then becomes withdrawable. Read which model applies, because it determines whether the bonus principal is ever yours or only ever a temporary betting float.
No-deposit versus match bonuses
No-deposit bonuses give you a small amount of bonus cash or a handful of free spins for signing up, with no deposit required. They are genuinely free to try, but they almost always come loaded with the strictest terms: high wagering multipliers, low maximum-cashout caps, sticky principal and short expiry. That combination is deliberate, because the operator has given you money at no cost and protects itself with terms on the way out. Treat a no-deposit bonus as a free look at the games rather than a serious route to a payout.
Match bonuses, the standard welcome offer, multiply your own deposit. Because you have committed real money, the terms are usually more reasonable: lower multipliers, higher or absent cashout caps, and more often a non-sticky, bonus-only basis. The trade-off is that you are risking your own funds, and if you opt in, that deposit is frequently locked to the wagering until it clears. This is why the decision to opt in or decline matters so much on a match, and far less on a no-deposit freebie.
Between these sit reload bonuses, cashback and free-bet promotions for existing players, which borrow terms from both camps. The reading method is identical: find the five numbers and run the sums.
Free-spin wagering
Free spins look simple and are quietly one of the most variable offers in their terms. The wagering can be defined in two different ways, and the difference is enormous.
Wagering on winnings. The common and fairer form. You play the free spins, and only the winnings they produce carry a requirement. Worked example: 50 free spins produce GBP20 in winnings, and the terms say 30x on winnings, so you must wager GBP20 times 30, which is GBP600. Manageable.
Wagering on the notional spin value. The harsher form, sometimes phrased as wagering on the total spin stake. Fifty spins with a notional value of GBP0.20 each represent GBP10 of spins, and 30x on that value is GBP300 of wagering whether or not you win anything. Read carefully, because the two definitions produce very different effort for the same fifty spins.
Also check the per-spin value, since free spins are usually pinned to the minimum stake, and any maximum-cashout cap, which on free-spin offers is often tight. Free spins with wagering on winnings and no cashout cap are a small genuine gift. Free spins with wagering on spin value plus a low cap are close to decorative.
Real money versus bonus money and the order of play
When you hold both cash and bonus funds, the order in which the site spends them shapes your options, and operators do not all handle it the same way.
In a cash-first model, your real deposit is staked before the bonus activates. This is the player-friendly arrangement, because you can play with your own money, and if you choose to stop, you walk away with whatever cash remains and simply never trigger the bonus wagering. Your deposit was never locked.
In a bonus-first model, or where the deposit and bonus are pooled and locked together from the moment you opt in, your own money is entangled with the wagering immediately. Stopping early means forfeiting the bonus and, depending on the terms, you may not be able to touch the deposit until the requirement is met. This is the model to watch for on deposit-plus-bonus offers, where the two are already combined for wagering purposes.
The practical rule follows from this. On a non-sticky, cash-first, bonus-only offer, opting in costs you very little, because you can abandon the bonus and keep your cash. On a sticky, pooled, deposit-plus-bonus offer, opting in is a real commitment of your own funds, and you should treat it as such. If you want to understand how we weigh all of this when rating an operator, see how we score bonuses, and you can browse the operators themselves in all casino reviews.
Putting it together: two full worked comparisons
Bring every element into one decision. Here are two offers a UK player might see side by side, worked end to end.
Offer A. 100% up to GBP150, 30x on bonus only, slots contribute 100%, max bet GBP5, no cashout cap, 30-day expiry, non-sticky, cash-first. Deposit GBP150 to claim the full GBP150 bonus. Wagering is GBP150 times 30, which is GBP4,500 of slot stakes. At roughly a 4% house edge the expected cost of clearing is about GBP180. Over 30 days that is GBP150 of stakes a day, easy to fit around normal play. Your deposit is never locked, and with no cashout cap the upside is uncapped. This is a fair, takeable offer.
Offer B. 200% up to GBP150, 40x on deposit plus bonus, slots 100% but your preferred blackjack contributes 10%, max bet GBP2, 5x cashout cap, 7-day expiry, sticky. Deposit GBP75 to claim GBP150 bonus, giving a GBP225 combined balance. Wagering is GBP225 times 40, which is GBP9,000. On slots that is GBP9,000 of stakes in 7 days, about GBP1,286 a day. On your actual game, blackjack at 10%, the effective volume is GBP9,000 divided by 0.10, which is GBP90,000, plainly impossible in a week. The GBP2 max bet slows you further, the 5x cap limits any win to GBP750, and the sticky principal means GBP150 of the balance is never yours. The 200% headline is by far the more generous banner and by far the worse deal.
The point is not that big percentages are always bad. It is that the percentage is one number among six, and the other five routinely overwhelm it.
Your decision checklist
Before opting in to any bonus, read five numbers and run two sums. The five numbers are the multiplier, the basis, the maximum bet while wagering, the contribution rate for the games you actually play, and the expiry window. The two sums are the total wagering, which is the reference amount times the multiplier, and the daily pace, which is that total divided by the days until expiry, adjusted for your game's contribution rate.
Then apply these tests:
- Is the basis bonus-only rather than deposit plus bonus? Bonus-only is materially better.
- Do the games you play contribute at or near 100%? If not, compute the effective volume before deciding.
- Is the max bet high enough that you will not breach it by habit? Set your stake below it and forget it.
- Is there a maximum-cashout cap, and does it strangle the upside you are playing for?
- Does the daily pace the expiry forces fit how you genuinely play, or will the bonus expire part-cleared?
- Is the bonus sticky, and if so, are you comfortable that the principal is a betting float you never keep?
- Is the model cash-first and non-sticky, so declining or abandoning costs you nothing but the bonus itself?
If an offer fails several of these, decline it. Every casino lets you play without the welcome bonus, and doing so keeps your deposit as ordinary withdrawable cash. The bonus is never the reason a good casino is worth your time. The game catalogue, the payout speed, the licence and the fairness of the terms are, and those are the things to weigh first. If you would like to avoid playthrough altogether, our no-wagering casinos carry none, and if you are choosing an operator for the UK market specifically, start with our vetted list of UK casinos. Read the terms once, properly, and no bonus will ever surprise you at the cashier again.