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Decoding Casino Bonus Wagering Requirements: The Math They Don't Want You to See

How to calculate true bonus value and avoid rollover traps
Written by
Guru Gwen
Published on
17 January 2025

Here's what most casino sites won't tell you: that "€500 welcome bonus" probably isn't worth €500.

In fact, depending on the wagering requirements, game restrictions, time limits, and maximum bet caps, it might only be worth €50. Or €20. Or nothing at all if the terms are designed to make clearing it nearly impossible.

Casino bonuses are marketing tools first, player benefits second. They're designed to look incredible in the headline and trap you in the fine print. Most players claim bonuses without understanding what they're actually agreeing to—and end up frustrated when they can't withdraw their "winnings."

This guide breaks down the mechanics of bonus wagering requirements, shows you how to calculate true bonus value, and teaches you which offers are worth claiming and which are designed to fail.

The goal: Never fall for a bonus trap again.

The Rollover Trap: How Casinos Lock Your Money

A wagering requirement (also called "rollover" or "playthrough") is the number of times you must bet your bonus amount (and sometimes your deposit) before you can withdraw any winnings.

Here's How It Works:

  • You deposit €100 and claim a 100% match bonus (€100)
  • The casino gives you €200 total to play with
  • The catch: You can't withdraw until you've wagered the bonus amount a certain number of times

If the wagering requirement is 30x the bonus:

€100 (bonus) × 30 = €3,000 in total bets

That means you need to place €3,000 worth of bets before the casino will let you cash out. Win or lose, every bet counts toward clearing the requirement.

The Reality Check:

Most players don't realize how much €3,000 in bets actually is.

  • €5 per spin → 600 spins
  • A 96% RTP slot → 4% statistical loss per bet
  • Expected loss clearing wagering → €120

That “€100 bonus” effectively costs you €20 in expected losses.

The Mechanics: What Counts, What Doesn't

Not all wagering requirements are created equal. These factors determine whether a bonus is clearable or a trap.

1. Bonus Only vs. Bonus + Deposit

Bonus Only (Better):
You only wager the bonus.
Example: €100 bonus × 30 = €3,000 wagering.

Bonus + Deposit (Worse):
You wager deposit + bonus.
Example: (€100 + €100) × 30 = €6,000 wagering.

Why It Matters:
Bonus + deposit wagering doubles your rollover burden.

2. Game Contribution Rates

Not all games clear wagering at the same speed.

Game TypeContributionWhat This MeansSlots100%€1 bet = €1 toward wageringTable Games10–20%€1 bet = €0.10–€0.20Live Dealer10% or excluded€1 bet = €0.10 (or nothing)Video Poker5–10%€1 bet = €0.05–€0.10

Translation:
A €3,000 wagering requirement on blackjack (10% contribution) means you'd need €30,000 in bets.

Casino Logic:
Slots have higher house edges → casinos let you clear bonuses faster on them.

3. Maximum Bet Limits

Most bonuses restrict your bet size while active.

Common Limits:

  • €5 max bet
  • €10 max bet
  • €2 max bet (harsh)

Why This Exists:
Larger bets let players win fast before the house edge kicks in.

If You Break the Limit:
A casino can void:

  • Your bonus
  • Your winnings
  • Even your account

4. Time Limits

Bonuses expire.

Common Windows:

  • 7 days → aggressive
  • 14 days → standard
  • 30 days → generous

A 30x bonus with 7 days is harder than a 40x bonus with 30 days.

5. Withdrawal Caps

Some bonuses limit how much you can cash out.

Example:
€100 bonus, winnings €2,000, max withdrawal = 10× bonus → €1,000 payout.

Where Caps Appear:

  • Free spins
  • No-deposit bonuses
  • Some reload bonuses

Even if you clear wagering perfectly, a cap can cut your winnings.

The Math: What Bonuses Are Actually Worth

Let's calculate true expected value using real numbers.

Example Bonus:

  • €100 deposit
  • €100 bonus
  • 30x bonus-only wagering
  • 100% slots contribution
  • 14-day expiry
  • No withdrawal cap

Step 1: Total Wagering

€100 × 30 = €3,000

Step 2: Expected Loss

96% RTP → 4% house edge
€3,000 × 0.04 = €120 loss

Step 3: True Bonus Value

Bonus received: €100
Expected cost: €120
True value = –€20

But here's the nuance:

If you were going to play anyway, the bonus gives you extra playtime, not extra money.

The bonus is worth claiming if:

  • You were already planning to play
  • You accept the expected loss
  • You want longer entertainment time

The bonus is a trap if:

  • You're depositing only for the bonus
  • Wagering is enormous
  • You expect guaranteed profit

Good Bonuses vs. Predatory Bonuses

Fair Bonuses (Worth Claiming)

Characteristics:

  • 20–35x wagering (bonus only)
  • 14–30 days expiry
  • Slots at 100% contribution
  • No/soft withdrawal caps
  • Max bet ≥ €5
  • Clear terms

Example:
€100 bonus, 30x wagering, 21 days.
Verdict: Fair if you'd play anyway.

Mediocre Bonuses (Proceed with Caution)

Characteristics:

  • 40–50x wagering
  • 7–10 days expiry
  • Table games at ≤10%
  • Withdrawal caps at 5–10× bonus
  • Max bet €2–€5

Example:
€200 bonus, 50x wagering, 10 days.
Verdict: High cost, time pressure.

Predatory Bonuses (Avoid)

Characteristics:

  • 60x+ wagering
  • Bonus + deposit wagering
  • 7 days or less
  • Withdrawal caps < 5× bonus
  • Max bet €1–€2
  • Buried or unclear terms

Example:
€500 bonus, 70x wagering (bonus + deposit), 7 days.
Verdict: Designed to be unclaimable.

Warning Signs You're About to Get Screwed

If you see these terms, avoid the bonus:

  • Wagering requirements above 50x
  • Bonus + deposit wagering
  • Expiry under 7 days
  • Max bet under €2
  • Withdrawal caps under 5× bonus
  • Your preferred games excluded
  • Terms unclear or buried

Rule:
If you have to read the terms three times, they're designed to confuse you.

When Bonuses Make Sense (And When They Don’t)

Claim Bonuses If:

  • You were already going to deposit
  • Wagering is 35x or lower
  • You have 14+ days
  • You play slots
  • You want more entertainment time

Skip Bonuses If:

  • You're tempted only by the bonus
  • Wagering is 50x+
  • You prefer table games
  • You want fast withdrawals
  • Terms are unclear

Reality:
Bonuses extend playtime. They're not income.

Calculate Before You Claim

The BetEdge Bonus Calculator shows:

  • Total wagering
  • Expected losses
  • Time to clear
  • True bonus value

How to Use It:

  1. Enter bonus amount
  2. Enter wagering requirement
  3. Select game type
  4. Input RTP (default 96%)
  5. View expected value

Use Bonus Calculator →

The Edge Is Knowing What You're Actually Getting

Bonuses aren't scams—but they’re not generosity.

They're structured to:

  • Get you to deposit
  • Keep you playing
  • Increase exposure to house edge

The BetEdge Approach:

  • Understand true clearing cost
  • Claim only bonuses matching your play style
  • Never deposit because of a bonus
  • Always read the terms

Use bonuses for entertainment, not profit.

View All Casino Bonuses Analyzed →

Download Bonus Calculator →

Read Next: RTP Explained →

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