Wagering Requirements: The Math Behind the Fine Print

The short answer

A wagering requirement (also called playthrough) is the total amount you must bet before bonus money can be withdrawn as cash. A $50 bonus at 35x means placing $1,750 in bets first. Multiply that total by the house edge of the games you'll play, and you'll see what clearing the bonus actually costs.

What is a wagering requirement?

When a casino gives you a bonus, it doesn't hand you withdrawable cash. It hands you credits with a condition attached: bet a multiple of the bonus before anything can leave your account.

That multiple is the wagering requirement. "35x" means you must place bets totaling thirty-five times the bonus amount. Take a $50 bonus at 35x and the math is simple: 35 × $50 = $1,750 in total bets.

Here's the part people miss. You don't need $1,750 of your own money. You bet, win some, lose some, and the same dollars cycle through many times. What matters is the running total of everything you've wagered. The casino tracks it, usually as a progress bar or percentage in your account.

Why do casinos do this? Without playthrough, everyone would claim a bonus, cash it out immediately, and walk away. The requirement forces the bonus money through the games, where the house edge quietly takes its cut on every bet. That's not a scandal. It's the business model. Your job is to measure it.

What does clearing 35x really cost?

Every bet you place carries a house edge, the small mathematical advantage built into each game. Cycle $1,750 through the games and that edge takes its expected slice of the whole amount, not just your original $50.

Run the numbers on our example:

• Bonus: $50 at 35x wagering = $1,750 in required bets
• Say you play slots with a 96% RTP, which means a 4% house edge
• Expected cost of the playthrough: 4% × $1,750 = $70
• Expected result: lose about $70 to clear a $50 bonus, roughly -$20 in expected value

That "free" $50 has a negative expected value before you've spun once. This won't be your exact result on any single attempt. Variance means some players clear it ahead and many finish behind. But the average across all attempts is a $20 loss, and averages are what fine print is priced on.

Now flip the inputs and watch the answer change. The same $50 at 20x requires $1,000 in bets. Expected cost: 4% × $1,000 = $40, against $50 of bonus value. That offer is mildly positive on paper, at least before weighting rules and cashout caps enter the picture.

Deposit, bonus, or both: what number gets multiplied?

The multiplier only tells you half the story. The other half is the wagering base, meaning which amount the multiplier applies to. Three versions show up in terms pages, and they produce wildly different totals.

Same headline number, double the workload: two casinos can both advertise "35x" while one demands twice the wagering of the other. Always find the letters or the sentence that says what the multiplier attaches to. If the terms just say "35x wagering," dig until you find the base. Vague phrasing here is itself a warning sign.

The base is where regulators found the worst abuses. When the UK's Competition and Markets Authority opened enforcement action against gambling firms in June 2017, it flagged promotions where customers might have to play hundreds of times before withdrawing any money, including offers where a £20 deposit plus a "free" £20 bonus meant wagering at least £800 first. The result, announced in February 2018: major operators formally committed that your own deposit can't be locked behind wagering.

No-deposit offers have their own quirks on top of this, including some of the strictest caps in the industry. We break those down in our guide to no-deposit bonuses.

How does game weighting work?

Not every bet counts fully toward the requirement. Casinos assign each game a contribution percentage, called game weighting, and the gap between games is enormous.

The math gets ugly fast. Say you're clearing that $1,750 requirement playing blackjack weighted at 10%. Every $10 hand only counts as $1, so you'd need $17,500 in actual bets to finish. The casino weights low-edge games lightly on purpose. Skilled blackjack play gives the house a much thinner cut per bet, so they make you place ten times more of them.

That last row is the trap. Playing an excluded game while a bonus is active can breach the terms entirely, voiding the bonus and any winnings tied to it. Check the casino's weighting table for the games you actually intend to play, not just the headline slots number.

What about max bets, cashout caps, and expiry clocks?

Three more clauses decide whether a clearable bonus is worth clearing. They're short lines in the terms, and they carry as much weight as the multiplier itself.

Max-bet rules. While a bonus is active, most casinos cap your bet size, commonly somewhere around $5 per spin or hand. It's an anti-abuse rule: big bets could clear requirements in a few lucky swings. Breach it, even accidentally, and the standard penalty is forfeiting the bonus and all winnings from it.

Max-cashout caps. Some bonuses limit what you can ever withdraw from bonus play, often expressed as a multiple of the bonus. With a $50 bonus capped at 5x, a brilliant run to $600 still pays out $250, and the casino removes the rest. Caps are most common on no-deposit and free-spin offers, and they slash the real value of any win.

Expiry windows. Requirements come with a deadline, commonly 7 to 30 days. That sets a pace: clearing $1,750 in 7 days means averaging $250 in bets every single day. If that pace doesn't fit how you normally play, the bonus expires half-cleared and you've paid house edge on every bet along the way.

How should you read bonus terms?

Bonus terms pages are long, but you only need six numbers. Pull them out in this order and the decision usually makes itself. Operators publish these on dedicated pages, like wild.io's bonus terms, typically linked from the promotion itself.

• The base: does wagering apply to the bonus, the deposit, or both?
• The multiplier: base × multiplier = your total wagering number
• Game weighting: what do the games you actually play contribute?
• Max bet: what's the bet cap while wagering, and can you comfortably stay under it?
• Max cashout: is there a ceiling on withdrawals from bonus play?
• Expiry: how many days do you get, and is the daily pace realistic for you?

Regulation pushes the same way. The UK Gambling Commission's player guidance on free offers says a site must make clear whether you're playing with your own money or restricted bonus funds, and can't change an offer's details once you've accepted it and started playing. In our experience, readers fixate on the multiplier and skim the rest, which is backwards: the multiplier is advertised, while the base and weighting table are where offers hide their real size.

Then run the one calculation that matters: total wagering × the house edge of your games, compared against the bonus amount. If the expected cost exceeds the bonus, you're not being given money. You're being sold playtime at a price, and it's fine to say no.

A bonus isn't good because the number on the banner is big. It's good when the terms behind it survive this checklist. Most don't, some do, and now you can tell them apart in a couple of minutes.

Sources

• GOV.UK — CMA launches enforcement action against gambling firms — retrieved July 2026
• Competition and Markets Authority — Making the online gambling sector fairer — retrieved July 2026
• UK Gambling Commission — Free offers and bonuses — retrieved July 2026
• Wild.io — Bonus terms — retrieved July 2026
• GamCare — Support for anyone affected by gambling — retrieved July 2026

Run the numbers on any bonus with the wagering requirement calculator — see the true value instantly.