How to calculate wagering requirements and bonus costs

To calculate wagering requirements, multiply the applicable calculation basis by the wagering multiplier. For example, you deposit €100, receive a €100 bonus, and face a 35x wagering requirement. If it applies only to the bonus, you need €100 × 35 = €3,500 in wagering; if it applies to the deposit plus bonus, you need €200 × 35 = €7,000.

Wagering means the total of qualifying bets - not an additional deposit or a fixed loss. This guide helps you calculate the bets required, compare terms, and understand theoretical expected losses. The calculations are models. The table of examples from our reviews further down shows what actual terms look like.

The calculation basis and multiplier determine your wagering requirement

Wagering requirement = calculation basis × wagering multiplier. You need both figures from the bonus terms to calculate wagering requirements. A multiplier of 35 alone tells you little: what matters is whether it applies only to the bonus or to the deposit plus bonus.

Wagering on the bonus or on the deposit plus bonus

With bonus-only wagering, multiply the credited bonus amount by the multiplier. If you deposit €100 and receive a €100 bonus with 35x bonus wagering, that means 35 × €100 = €3,500 in required wagering. Your deposit is not part of the calculation basis in this example.

With deposit-plus-bonus wagering, both amounts are added together. The same €100 deposit and €100 bonus at a multiplier of 35 therefore produce 35 × €200 = €7,000 in required wagering. Despite the identical multiplier, you need twice as much qualifying wagering.

The applicable bonus terms determine which version applies. If they only say “35x wagering” without clearly identifying the calculation basis, clarify it before accepting the bonus.

Warning: If the calculation basis is unclear, ask live chat before activation and save a screenshot of the answer. In a dispute, the terms matter - not what you assumed.

Distinguish wagering requirements, balance, and withdrawals

A €7,000 wagering requirement means neither a required €7,000 deposit nor a guaranteed €7,000 loss. Wagering counts qualifying bets, not just the money you deposit. If you bet €10 and receive €8 back, betting that €8 again can generate additional wagering progress.

Your balance can still run out before you reach €7,000. Do not deposit more solely to finish wagering you have already started.

Completing the wagering requirement does not automatically make your balance withdrawable. Other bonus rules, such as a maximum bet or withdrawal cap, still apply, as does KYC identity verification where required.

Calculate wagering requirements in five steps

Along with the multiplier, you need the calculation basis and game contribution. With a €100 deposit and €100 bonus, a 35x requirement could mean €3,500 or €7,000 in qualifying wagering, depending on which amount it applies to.

Take the figures from the bonus terms

1. Record the deposit and bonus. Write down the two amounts separately. If you deposit €100 and receive a €100 bonus, your starting balance is €200, but that does not yet tell you which amount must be wagered.

2. Identify the calculation basis. Check whether wagering applies only to the bonus or to the deposit plus bonus. In this example, the calculation basis is either €100 or €200.

3. Find the wagering multiplier. Multiply the calculation basis by the stated multiplier. At 35x, a €100 bonus produces exactly €3,500 in required wagering; a €200 deposit-plus-bonus basis produces €7,000.

4. Account for game contribution. Divide the wagering requirement by your chosen game's contribution rate. The expanded formula is: Bets required = wagering requirement ÷ contribution rate. Enter 100% as 1.00 and 20% as 0.20; at 0%, the game contributes nothing toward completion.

5. Assess the result against the deadline and bet limit. Note when wagering must be completed and the maximum bet allowed. A seemingly manageable amount can create substantial pressure to play when the deadline is short; larger bets are not a solution if they breach your budget or the bonus rules.

Compare two bonus models in a calculation table

We compare two calculation bases and also show how a lower contribution rate changes the bets required.

At a 20% contribution rate, the calculation is €7,000 ÷ 0.20 = €35,000. A €10 bet then reduces the remaining wagering requirement by only €2. When you compare bonus terms, consider the calculation basis, multiplier, and contribution together.

With €7,000 in bets required and a constant €2 per round, the result is 3,500 rounds, provided every valid bet counts in full. This is a calculation, not a recommendation for how long to play. Total wagering is neither an additional deposit nor a guaranteed loss: the same balance can be wagered repeatedly, but it can also run out before you meet the requirement.

Game contribution and other terms change the calculation

At a 10% contribution rate, a €10 bet generates only €1 in qualifying wagering. You therefore need to distinguish between the money you actually bet and the amount that reduces your wagering requirement. A low multiplier alone does not tell you how demanding a bonus is.

Partially contributing and excluded games

Under the bonus terms, games may contribute fully, partially, or not at all. Check the specific bonus to see how slots, table games, or live casino games contribute; there are no universally applicable percentages. Individual titles may also differ from their category's general rule.

For a €1,000 wagering requirement, the difference looks like this:

For a game contribution above 0%, the calculation is: Wagering requirement ÷ contribution rate = total bets required. At 10%, that means €1,000 ÷ 0.10 = €10,000; this is cumulative betting volume, not automatically your loss or required deposit.

At 0%, you cannot complete the wagering requirement with that game. Dividing by zero does not produce a meaningful betting amount here. Also distinguish between a game that simply does not contribute and one that is explicitly prohibited while a bonus is active.

Maximum bet, deadline, and winnings cap

If the maximum bet is €5, a €6 bet breaches that limit - even if your wagering calculation is correct. Depending on the bonus terms, this could result in the bonus being removed or winnings being voided.

Warning: Many casinos treat purchased bonus rounds as a single bet, including for the maximum-bet limit. At Slotoro and WinSpirit, that limit is €5; at 7Bit, it is just €1 with an active bonus.

Check both the start and end of the wagering period: does it begin with activation, the deposit, or the bonus credit? The expiration date and time also matter; do not force completion through longer sessions or larger bets.

A potential withdrawal cap needs a separate check. Establish whether it limits bonus winnings or a differently defined amount.

Separately, check what happens if you withdraw before completing wagering: will the bonus and associated winnings be removed, for example? A favorable multiplier does not automatically compensate for an unsuitable deadline or a low withdrawal cap.

Estimate theoretical bonus costs using RTP

A wagering requirement is not a price: Having to wager €7,000 does not mean the bonus costs you €7,000. It means the sum of your qualifying bets, which can include winnings you wager again. A statistical cost estimate requires combining the actual bets required with the assumed house edge.

Calculate the statistical expected loss

The simple formula is: Theoretical expected loss = bets required × (1 − RTP). RTP describes a game's theoretical return over a very large number of rounds; at 96% RTP, the theoretical house edge is 4%. This does not mean that betting €100 in a single session will return exactly €96.

Take a €100 deposit and €100 bonus with a wagering multiplier of 35. If only the bonus forms the calculation basis, the wagering requirement is €3,500; if the deposit and bonus count, it is €7,000. With full game contribution and an assumed 96% RTP, the result is:

Here, changing the calculation basis doubles not only the wagering but also the statistical cost. If bets contribute only partially, you must first calculate the actual bets required: at 50% contribution, a €7,000 wagering requirement needs €14,000 in total bets.

Tip: The lower multiplier is not automatically the better bonus. 35x on the bonus only (€3,500 in wagering) costs less on average than 25x on the deposit plus bonus (€5,000 in wagering).

Why the average does not predict your result

A €100 bonus is not automatically €100 in available cash. Its withdrawal depends on the bonus terms. That is why neither “€100 minus €140” nor “€100 minus €280” alone reliably predicts your withdrawable balance or guarantees a net profit.

The example assumes that you actually wager the entire €3,500 or €7,000. However, your balance can run out earlier; individual large wins can also make your result differ substantially from the average. The size of these swings depends partly on the game's payout distribution and your bet size.

Set a fixed loss limit before accepting a bonus, and do not deposit more just to complete wagering. The calculation using 96% RTP cannot be applied unchanged to sports betting: a bet's expected value depends partly on its odds and the actual probability of the outcome.

Sports betting depends on minimum odds and settlement

A €50 bonus with a 10x bonus-only wagering requirement produces €500 in qualifying wagering in this example: €50 × 10 = €500. The total amount you bet is not the only factor. Every qualifying bet must also meet the relevant bonus terms.

Calculate qualifying wagering

With full contribution and a constant €10 stake, you would mathematically need 50 valid bets to reach €500 in wagering. You must have enough balance available for each subsequent bet. This calculation means neither that you must deposit €500 in total nor that your starting balance will last until the final bet: losses can end the process earlier.

An assumed minimum decimal odds requirement of 1.80 is an eligibility condition for wagering contribution. A bet at odds of 1.70 does not meet it - even if it wins. Minimum odds alone do not establish a fixed loss amount for completing the bonus.

With stake-based contribution, only €10 in wagering counts, not €20. Also check whether only fully settled bets increase the wagering counter and the deadline for their settlement.

Check cashout and voided bets separately

Before placing your first bonus bet, read whether single bets and parlays are allowed and how the minimum odds apply to a parlay. Separately check how the terms treat cashout, voided bets, and hedged opposing bets. A bet closed early through cashout or later voided may not contribute.

Do not treat the 50 example bets as a fixed route to releasing the bonus. Even bets that meet the formal rules can exhaust your available balance; there is no guaranteed betting strategy for completing a bonus. Set a loss limit and do not deposit more solely because wagering remains.

Identify the unit used for crypto bonus wagering

First check whether your bonus wagering is tracked in BTC, USDT, or a fiat account currency such as euros. You need this information to calculate wagering requirements: the displayed euro equivalent is not automatically the unit in which your remaining requirement decreases.

Distinguish coin-denominated wagering from its equivalent value

Suppose you receive a 0.001 BTC bonus with a wagering multiplier of 30. If only the bonus forms the calculation basis and your bets contribute in full, the calculation is: 0.001 BTC × 30 = 0.03 BTC in required wagering. This is the sum of qualifying bets required, not the amount you must deposit or lose.

The euro equivalent depends on the exchange rate. Using two assumed rates, it looks like this:

The euro equivalent rises by €180 here, while the wagering requirement remains 0.03 BTC. This does not establish a universal conversion practice: the account currency, conversion timing, and specific bonus terms determine what applies. If your deposit is converted to euros and bonus wagering is also tracked in euros, for example, you must continue calculating in that unit.

Calculate network fees separately from the bonus

Network fees, conversion costs, and potential provider fees belong on a separate cost line from statistically expected gambling losses. A €3 transfer cost on a deposit worth €50 equals 6% of the deposit amount: €3 ÷ €50 × 100. Check at the relevant payment step whether fees are deducted from the transferred amount or paid on top.

Depositing cryptocurrency removes neither gambling losses nor exchange-rate risks. Include transfer costs within your fixed total budget; for technical basics on wallets and networks, see Understanding crypto payments.

Real terms: Examples from our reviews

The following figures come from our reviews as of November 2026. Required wagering is calculated for a €100 bonus in each case, with expected losses based on 96% RTP and full contribution.

Two things stand out: with the same multiplier, the deadline and maximum bet determine how realistic completing wagering is. €4,000 in 5 days at a maximum of €5 per spin requires at least 800 spins; at 7Bit, with its €1 maximum bet, €3,500 requires 3,500 spins. At many casinos, popular slots contribute only half - doubling the bets required.

Use a checklist to decide whether to accept a bonus

Check eight points before accepting a bonus: together, they show how much qualifying wagering you need and whether the terms fit your plans. Use this checklist:

• Calculation basis: Does the multiplier apply only to the bonus or also to the deposit?
• Wagering multiplier: What multiplier is applied to the calculation basis?
• Contribution: What share of your bets counts toward the wagering requirement?
• Allowed games: Which games or bet types are eligible?
• Maximum bet: What bet limit applies during bonus play?
• Deadline: When must wagering be completed?
• Withdrawal cap: What is the maximum amount you can withdraw?
• Calculation unit: Are your balance and wagering requirement tracked in euros, USDT, or another unit?

Compare the bonus with playing without one

If you decline the bonus, its wagering requirement does not apply; other account and withdrawal terms may still apply. Check verification and withdrawal terms even when playing without a bonus.

A mathematically attractive bonus can still be unsuitable if it requires more bets or playing time than you had planned. If you only intended to play for one hour, for example, a wagering deadline should not turn that plan into several extra sessions.

Set your budget and stopping point before depositing

If you want to lose no more than €50, do not deposit more because wagering remains. Set deposit, loss, and time limits where available, and plan breaks in advance: Planning limits and breaks.

Your €50 stopping point still applies even if only a little wagering remains. Gambling is not income; neither a bonus nor a careful calculation prevents losses.