That $100 Bonus? Do This 60-Second Math Check Before You Claim It
You've seen the banners. "$100 Welcome Bonus!" in big gold letters, usually next to a stock photo of someone who has never once looked that happy holding a phone.
Here at Moyo Casino, we've spent a lot of time reading the fine print so you don't have to, and we can tell you the uncomfortable truth: the number on the banner is marketing. The number that matters is buried in the terms, and it's called the wagering requirement — sometimes labeled playthrough or rollover.
Once you learn to run one simple calculation, you'll be able to size up any promo in about the time it takes to microwave a Hot Pocket. Let's walk through it.
What a Wagering Requirement Actually Is
A wagering requirement is the total amount you have to bet before bonus money (and usually any winnings from it) turns into withdrawable cash.
It's expressed as a multiplier. A 30x requirement on a $100 bonus means you must place $3,000 in total bets before you can cash out. Not lose — just bet. Win or lose each individual spin, every dollar wagered counts toward the total.
That distinction matters. Most casual players hear "$3,000" and assume they need $3,000 in their account. You don't. You need to cycle money through. But — and this is the catch — every cycle exposes you to the house edge, and that's where bonuses quietly become less valuable than they look.
The Real Math: Why $100 Might Be Worth $10
Let's run a realistic example. Say you claim that $100 bonus with a 30x playthrough, playing an online slot with a 4% house edge (roughly a 96% RTP, which is typical for many popular US-facing slots).
To clear the bonus, you bet $3,000. At a 4% house edge, your expected loss over that $3,000 in action is about $120.
Read that again. Your expected cost of unlocking a $100 bonus is $120. On paper, the expected value of that bonus is negative $20. You'd genuinely be better off keeping $10 of your own money and skipping the promo entirely.
Now compare a different offer: a $25 bonus at 10x. Total wagering is $250, expected cost is about $10 at that same house edge. That bonus has a real expected value of roughly +$15. Smaller number on the banner — better actual deal.
This is the whole game. Bonus value = bonus amount minus (total wagering × house edge). If you remember nothing else from this article, remember that.
The One-Minute Check
Here's the quick version you can run on any promo before clicking "claim":
- Find the multiplier and what it applies to. Is it 30x the bonus, or worse, 30x the bonus plus your deposit? A 30x requirement on a $100 deposit + $100 bonus is $6,000 in action, not $3,000. Read carefully.
- Multiply it out. Bonus amount × requirement = total wagering. If it applies to deposit + bonus, add the deposit first.
- Estimate the expected cost. Multiply total wagering by roughly 3–4% if you're playing slots. That's your expected cost to clear it.
- Compare. If the expected cost is anywhere near the bonus amount, the promo is decoration, not value.
Step three takes ten seconds on your phone's calculator, and it will save you from more bad promos than any review site ever could.
Other Fine Print That Changes Everything
The math check assumes a level playing field, but a few common terms can swing the numbers hard:
- Game weighting. Table games and video poker often count 10–20% toward wagering, meaning every dollar bet only counts as 10–20 cents. Slots usually count 100%.
- Max bet limits. Many bonuses cap bets at $5 while wagering. Bet over it and you can void your winnings. Ask us how we know.
- Time limits. A 30x playthrough in 7 days is a grind. If the clock runs out, bonus funds and winnings evaporate.
- Max cashout caps. Some no-deposit-style promos cap what you can withdraw from bonus winnings at $50 or $100, no matter how hot your run gets.
Any one of these can turn a mathematically okay bonus into a bad one.
When Bonuses Actually Make Sense
We're not anti-bonus — far from it. Bonuses are great when:
- The playthrough is low (10x–20x is genuinely player-friendly)
- You were going to play that amount anyway and treat the bonus as extra runway, not guaranteed money
- There's no aggressive max-bet or cashout cap working against you
The mindset shift is this: a bonus is not free money. It's a bet with the casino that you'll complete a marathon of wagering. Sometimes that bet is worth taking. Sometimes you're paying $120 in expected losses for the privilege of holding $100 you can't touch.
Run the minute of math. Your bankroll will thank you — and so will your future self, the one who isn't three hours deep into a playthrough wondering where the weekend went.
