KEY TAKEAWAYS
A wagering requirement applies a multiplier to a base amount, and the deposit-plus-bonus wagering requirement differs from the bonus-only version in which amount that is. With a bonus-only requirement, the multiplier applies to the bonus amount. With a deposit-plus-bonus requirement, it applies to the deposit and the bonus added together. The difference can double the amount that must be bet, even when the multiplier looks smaller.
This matters for anyone comparing offers, because a requirement such as “20x” tells only half the story. Without the base, the figure cannot be turned into dollars. This guide explains both bases, gives the formulas, works through two fictional offers, and shows how to convert one base into the other so that two offers can be compared fairly. Every offer here is hypothetical, and no real casino or promotion is described.
What the Base of a Wagering Requirement Means
A wagering requirement, also called a rollover or playthrough, is the amount that must be bet before bonus funds and the winnings from them can be withdrawn. It is written as a multiplier, such as 30x, and the multiplier applies to a base. The base is the number the multiplier is applied to, and the offer’s terms state it, often in a sentence like “wagering applies to the bonus amount” or “wagering applies to the deposit and bonus”.
In the bonus-only base (written B), the deposit does not count. If a casino credits a $100 bonus, a 30x requirement applies to $100. In the deposit-plus-bonus base (written D + B), the player’s own deposit is included. A $100 deposit that earns a $100 bonus produces a base of $200, so a 30x requirement applies to $200.
A deposit match is the offer type where this choice appears most often, because the bonus is credited alongside a deposit. Offers without a deposit, such as no-deposit bonuses, normally use the bonus alone. Many casinos use one base across all their offers, while others vary it between promotions, so the base is worth reading each time.
Some terms also add details, such as whether real money is used before bonus funds or whether the requirement applies to winnings from free spins. Those details change how a requirement plays out, and the offer’s own terms are what count.
The Formulas and Assumptions
The amount that must be bet follows one formula, and only the base changes.
where: multiplier is the “x” number, and base is B (bonus only) or D + B (deposit plus bonus), where D is the deposit and B is the bonus. To compare a deposit-plus-bonus offer with a bonus-only offer, convert it to an equivalent bonus-only multiplier.
where: the multiplier is the deposit-plus-bonus figure. With a 100% match, D equals B, so the conversion simply doubles the multiplier. The cost of that wagering follows from the house edge.
where: house edge = 100% − RTP. This is a simplified estimate and an average, and it ignores caps, time limits, maximum-bet rules, variance and the chance of losing the balance before finishing. The break-even multiplier, where the simplified value is zero, is bonus ÷ (base × house edge).
All examples below assume a hypothetical slot with a 96% RTP, so the house edge is 4%, and games counting 100% toward the requirement.
Worked Example With Two Fictional Offers
Suppose Casino A and Casino B both offer a hypothetical 100% match up to $500, and a player deposits $200 at each, so the bonus is $200 at both. Casino A requires 30x on the bonus only. Casino B requires 20x on the deposit plus bonus. At first glance, 20x looks easier than 30x.
Casino A, step 1: Required wagering = 30 × $200 = $6,000.
Casino A, step 2: Expected cost ≈ $6,000 × 4% = $240.
Casino A, step 3: Simplified value ≈ $200 − $240 = −$40.
Casino B, step 1: Base = $200 + $200 = $400, so required wagering = 20 × $400 = $8,000.
Casino B, step 2: Expected cost ≈ $8,000 × 4% = $320.
Casino B, step 3: Simplified value ≈ $200 − $320 = −$120.
The result in words: Casino B’s lower multiplier requires $2,000 more wagering and costs about $80 more on average. Converting confirms it, because 20 × ($400 ÷ $200) = 40x on a bonus-only basis, which is higher than Casino A’s 30x. Both estimates are negative, which means the average cost of clearing exceeds the bonus in both cases.
Comparing Bases and Multipliers
The table uses a fictional $100 deposit with a 100% match, so the bonus is $100, and a 4% house edge. The base column shows what the multiplier applies to. These are example terms, not real offers.
| Terms | Base ($) | Required wagering ($) | Expected cost at 4% ($) | Simplified value ($) |
|---|---|---|---|---|
| 30x bonus only | 100 | 3,000 | 120 | −20 |
| 30x deposit + bonus | 200 | 6,000 | 240 | −140 |
| 15x deposit + bonus | 200 | 3,000 | 120 | −20 |
| 20x bonus only | 100 | 2,000 | 80 | +20 |
| 10x deposit + bonus | 200 | 2,000 | 80 | +20 |
The pairs at 30x and 15x, and at 20x and 10x, are equivalent. A smaller match changes the ratio. If a hypothetical offer matches 50% up to $250 and a player deposits $200, the bonus is $100 and the deposit-plus-bonus base is $300, so a 30x requirement means 30 × $300 = $9,000 of wagering. Converting gives 30 × ($300 ÷ $100) = 90x on a bonus-only basis. The smaller the match, the heavier the deposit-plus-bonus base becomes relative to the bonus.
Break-even points differ too. For a $100 bonus at a 4% house edge, a bonus-only requirement breaks even at 100 ÷ (100 × 0.04) = 25x. A deposit-plus-bonus requirement with a $200 base breaks even at 100 ÷ (200 × 0.04) = 12.5x.
Common Catches and Mistakes
The most common mistake is comparing multipliers without comparing bases. A 20x and a 30x requirement cannot be ranked until each is converted into dollars of required wagering, as the Casino A and Casino B example shows.
A second mistake is assuming the deposit does not count. In a deposit-plus-bonus base it does, even though the money is the player’s own. A third is overlooking contribution rates. If a game counts only 20% toward the requirement, $6,000 of required wagering needs $6,000 ÷ 0.20 = $30,000 in actual bets, and a game that counts 0% never clears it.
It is also easy to forget that the base may differ between offers from the same casino, or between bonus credit and free spins winnings. Time limits matter as well, because a larger required amount has to fit in the same number of days. Treat a bonus as an entertainment cost within a budget, never as a reason to deposit more. Short-run wins while clearing a requirement are variance, not evidence that an offer is generous.
Checklist: Finding the Base
To find and compare the base of any offer, read its own terms and check each item in this list.
To check a calculation, multiply the multiplier by the base, then multiply by the house edge of the game you assume, and compare the result with the bonus. Convert to a bonus-only multiplier with multiplier × (D + B) ÷ B whenever two offers use different bases.
Related Concepts and Next Steps
For the foundation, read how wagering requirements work. The offer type that most often uses a deposit-plus-bonus base is explained in how a casino deposit match bonus works, and the offer without a deposit is covered in how no-deposit casino bonuses work. For the full value calculation, see how to calculate the real value of a casino bonus. Terms vary between offers, and the offer’s own terms are what count.
Frequently Asked Questions
