A £100 bonus with a 35x wagering requirement looks generous until you run the multiplication. Thirty-five times £100 comes to £3,500 in stakes before a penny of that bonus turns into cash you can withdraw. Most UK players find that out after claiming, not before.
Operators publish the terms. They sit on the promotion page, below the headline figure in smaller type. Two minutes of reading decides whether the offer deserves your deposit.
Bonus credit sits in a balance separate from your deposit. You stake it, you win with it, and the money stays locked until you clear the playthrough target attached to it. That target is a multiplier applied to the bonus alone, or to the bonus plus your deposit.
Staking £3,500 on eligible games at 35x unlocks the bonus. You lose part of that £3,500 to the operator along the way, because every spin carries the house edge. A multiplier counts what you bet, not what you win, so a cold run costs you the same as a hot one in progress terms.
A 35x requirement on a £20 bonus asks for £700 of staking. Add a £20 deposit to the calculation and the same multiplier asks for £1,400. Operators seldom spell out which version they use, and the gap doubles the work you face.
Slots contribute 100% toward playthrough on most sites. Table games, live dealer tables and video poker count at 10% or 20%, and some sit at zero. A £10 live blackjack hand counted at 10% adds £1 to your target, which stretches the deadline for anyone who prefers cards to reels.
Deposits made by debit card, PayPal or an open banking transfer such as Trustly sit outside the total, and withdrawals never count. UK rules ban credit card deposits for gambling, so that funding route stays closed whatever a bonus page implies.
The operator treats a bonus as marketing spend with a condition attached. It hands you credit and wants a return on it, so the multiplier makes you generate wagering volume before the money leaves the building. Set the number too high and players stop claiming. Set it too low and the promotion costs more than it earns.
That trade-off explains the spread across the market. Brands chasing new customers offer 10x or 20x on a modest bonus. Brands protecting margin push 40x or higher and rely on the headline figure to pull people in.
Free spin offers hide a second set of terms. Winnings land as bonus credit with a multiplier attached, and the value of each spin caps what you can keep from it. Twenty spins at 10p each carry £2 of stake value, and the expiry clock starts the moment you open the game.
A no-deposit bonus hands you £5 or £10 of credit once you verify your details. The multiplier on those offers runs higher than on deposit deals, often 40x or 50x, because the operator carries all the risk. A £10 credit at 50x asks for £500 of staking, and the maximum win cap on the same offer might hold you to £50.
Registration offers also tie the time limit to your first login, so the clock runs before you have read the terms. Verify the account first, then decide whether the staking target suits your budget.
Most UK bonuses expire within 30 days of claiming, and some give you seven. Miss the window and the bonus balance vanishes, along with anything you built from it. Put the expiry date in your calendar on the day you claim, not the day you remember.
A maximum bet clause caps your stake while you clear the bonus, at £5 per spin or hand on most offers. Break that cap and the operator can void the winnings you earned from bonus funds. One careless £20 spin can wipe out a week of play.
Win caps work the same way. An offer that limits conversion to £100 turns a £400 bonus win into £100. Check the cap before you decide the offer deserves your time.
The Gambling Commission expects significant terms to appear alongside the headline offer. You should see the wagering multiplier, the expiry date, the eligible games and the maximum bet clause without hunting through a FAQ page. A site that hides those numbers deserves suspicion.
Licensed operators also print their licence number and UKGC account details in the footer, next to links for GamStop and BeGambleAware. A casino that shows its registration without you asking carries less risk than one that buries it three pages deep.
Divide the playthrough total by your average stake. A £3,500 target at £1 per spin means 3,500 spins, which at 600 spins an hour takes close to six hours of play.
Then apply the game's return. A slot with 96% RTP returns £3,360 for every £3,500 staked on average, so the expected cost lands at £140. Against a £100 bonus, that figure sits above the bonus value, which means the operator holds the edge. You can beat that average across a few hundred spins, and you meet the average if you keep going.
A 10x multiplier on the same £100 bonus tells a different story. £1,000 of staking costs about £40 in expected losses, which leaves room for the bonus to pay. A lower multiplier leaves more of the credit intact after the expected losses.
Run the same numbers on three offers side by side. A 20x multiplier on a £50 bonus with 100% weighted slots costs about £40 in expected losses at 96% RTP. A 40x multiplier on a £100 bonus costs about £160. The bigger headline figure loses the comparison once you apply the return.
A deposit match doubles or triples what you put in, and the multiplier lands on the combined figure. A 50% match on £100 gives you £50 of bonus credit, so a 30x term asks for £1,500 of staking on the bonus alone. Reload offers follow the same pattern and arrive every week, which tempts regular players into clearing terms they never costed.
Most licensed casinos show a progress bar on the bonus page or inside the cashier. Check the remaining playthrough at the start of each session, and write your staking total down somewhere you will look again.
Track the games you play and the rate they count at. You clear a target faster on a 100% weighted slot than on a table that counts at 10%, even when the stakes match. Check the weighting before you settle in for a session, because a target that only counts a tenth of your stake will not fall inside the time you have.
Multipliers run from 10x to 60x across the market, and game weighting rules shift the real cost more than the headline number does. You can compare how UKGC-licensed brands set those terms in this article and see where the softer requirements sit.
Decide what you will stake to clear a bonus, then stop when you reach it. If a playthrough target pushes you toward chasing losses, GamStop removes you from every licensed UK site for a period you choose, and BeGambleAware runs free support for anyone who needs it.
Treat a bonus as a trade with published terms. You know the staking, the deadline and the expected cost before you click. Offers that survive that reading deserve your deposit, and the rest can sit unclaimed.