A casino bonus is a contract with conditions, presented as a gift. Investigating one means reading the conditions, doing the arithmetic and deciding whether the deal is actually good. This guide walks through the process we use. The example numbers are invented for illustration and do not describe any real offer.
Step 1: Collect every document
Bonus rules are often split across several places: the promotion page, a general bonus terms page, the site’s terms and conditions, and sometimes a separate policy on bonus abuse. Read them all. Where documents disagree, note the conflict and ask support which applies. Save copies or screenshots dated on the day you claim.
Step 2: Find the wagering total
Identify the multiple and what it applies to: bonus only, or deposit plus bonus. Then convert it into money. A 35x requirement on a 100 bonus is 3,500 of bets. If it also applies to your 100 deposit, it is 7,000. That is the size of the task.
Step 3: Estimate the expected cost
Every bet has a house edge. As a rough guide, multiply the total wagered by the house edge of the game you will play. If you must bet 3,500 on a slot with a 4% edge, the expected cost is about 140, which is more than the 100 bonus. Real results will vary a great deal, but this shows why high multiples often make a bonus worth less than it looks. Our licence guide covers who oversees the operator; the arithmetic here tells you what the promotion costs.
Step 4: Check the restrictive clauses
- Game weighting: which games count and by how much.
- Maximum bet: the largest single stake allowed and the penalty for exceeding it.
- Expiry: the number of days to complete wagering.
- Win cap: a limit on what can be withdrawn from bonus winnings.
- Excluded games and payment methods.
- Minimum odds for sports offers.
- Country restrictions.
Step 5: Read for discretion clauses
Look for wording that lets the operator confiscate winnings at its “sole discretion”, or defines “irregular play” or “bonus abuse” so broadly that ordinary play might qualify. Some rules against abuse are reasonable, such as banning multiple accounts. Concern arises when the rules are vague and the penalty is losing everything. A cluster of these clauses is a warning sign, discussed further in our scam-spotting routine.
Step 6: Understand what happens to your deposit
Find out whether you can withdraw your own money before completing the requirement, and what that does to the bonus. Some casinos cancel the bonus and any winnings from it. Others will not let you withdraw at all until the requirement is complete. Also check whether the bonus balance and cash balance are separate, and which is used first.
Step 7: Test with a small amount
If you decide to proceed, use a small deposit, keep records of your bets and your progress towards the requirement, and check that the tracker in your account matches your own notes. If the numbers disagree, contact support in writing straight away.
A scoring shortcut
Give each offer a quick rating out of five points:
- Wagering total is modest relative to the bonus.
- Time limit is realistic.
- Maximum bet rule is reasonable and clear.
- No unusually low win cap.
- Terms are consistent and free of vague discretion clauses.
Offers scoring three or fewer are usually better skipped. This is our own rule of thumb, not a scientific measure.
Questions to put to support
If any point is unclear, ask in writing: does the requirement apply to the bonus only or to deposit plus bonus, which games count fully, what is the maximum bet, and can I withdraw my deposit before finishing? Save the reply. A clear operator answers quickly and without pressure.
Sports offers and free bets
The same investigation applies to sportsbook offers. Check minimum odds, whether the free bet stake is returned with winnings, and whether there is a rollover. A free bet that returns only profit is worth noticeably less than its face value.
A worked comparison
Imagine two invented offers. Offer A gives 100 with a 40x requirement on the bonus, a 7-day limit and a maximum bet of 2. Offer B gives 50 with a 20x requirement, a 30-day limit and a maximum bet of 5. Offer A demands 4,000 in bets within a week, while Offer B demands 1,000 over a month. At a 4% house edge the expected cost of clearing A is about 160 against a bonus of 100, while for B it is about 40 against a bonus of 50. The smaller bonus is clearly the better deal, even though its headline number looks weaker. The exact figures will differ for real offers, but the method carries over.
Keeping your own log
Write down the date you claimed, the terms as they read, your balance, and each session’s bets. If a dispute arises, a simple log beats memory and makes your complaint far stronger.
When to walk away
If the terms are hard to find, contradictory or unreasonable, decline the bonus. You can nearly always play without one, and withdrawals are simpler that way. A bonus should never be the reason you deposit more than you planned.
See also how to read player complaints to see how bonus disputes commonly arise, and never chase a requirement with money you cannot afford to lose.
18+ (21+ where local law requires) only. Play responsibly. Gambling involves risk and no strategy or guide can guarantee a win. Only play with money you can afford to lose. If gambling stops being fun, see our responsible gambling page for tools and helplines.
