Game Weighting in Bonus Wagering

Game weighting — also called game contribution — is the rule that decides how much each euro you bet counts toward clearing a bonus. It is written as a percentage. If a game contributes 100%, a €1 bet reduces your remaining wagering by €1. If it contributes 10%, that same €1 bet only reduces it by €0.10. The stake leaves your balance in full either way; only the credit toward the requirement shrinks.

This single line in the terms is the difference between a bonus that is realistically clearable and one that is not. Two offers with identical headline numbers can behave completely differently once weighting is applied.

What a contribution table looks like

Almost every bonus is attached to a table or list that groups games by category and assigns each a percentage. The exact figures vary by operator, by campaign, and by the licence the site holds, so no universal table exists. The general shape, however, is consistent across the industry:

• Slots usually sit at or near the top of the scale, often the full 100%.
• Table games — roulette, blackjack, baccarat, poker variants — are typically reduced sharply, sometimes to a small percentage, sometimes to zero.
• Live dealer games are frequently weighted lower than their RNG equivalents, or excluded outright.
• Video poker is commonly restricted because optimal play pushes the theoretical return very high.
• Jackpot slots and certain named titles are sometimes carved out even when slots as a category contribute fully.

You will also see individual slots excluded. These tend to be high-RTP or feature-buy titles where the expected loss over the wagering cycle is unusually small. If you play them, the bets may count for nothing — or, in stricter terms, breach the offer entirely.

Why casinos weight games at all

Weighting is risk management, not arbitrary punishment. A bonus is only sustainable for the operator if the expected house edge collected during the wagering cycle roughly covers the value handed out. Games differ enormously in how much edge they return per unit staked.

Two properties drive the decision. The first is RTP: a game returning a very high theoretical percentage gives the house very little per bet, so the same turnover produces far less margin. The second is volatility. Low-volatility games with near-even-money outcomes — think betting red and black, or a small-spread blackjack strategy — let a player grind through turnover with minimal expected loss and very low variance. Our guide to RTP and volatility explains why those two numbers behave differently, and why a casino cares about both.

Some terms go further and ban low-risk betting outright: covering both sides of a roulette table, or hedging baccarat banker and player. That clause exists even where the game itself technically contributes, so read it alongside the percentage.

The worked example: what 10% actually costs

Take a bonus of €100 with a 30× wagering requirement on the bonus amount. That is €3,000 of qualifying turnover.

On a slot contributing 100%, you need €3,000 in actual bets. At €1 per spin, that is 3,000 spins.

On roulette contributing 10%, every €1 staked counts as €0.10. To generate €3,000 of credited turnover, you must stake €30,000 — ten times the money moving through your account. The requirement did not change on paper; the real cost of clearing it multiplied by ten.

Now mix them. If half your credited turnover comes from slots at 100% and half from roulette at 10%, you need €1,500 in slot bets plus €15,000 in roulette bets: €16,500 total staked to clear a €3,000 requirement. This is why the multiplier alone tells you almost nothing. If the arithmetic behind the multiplier is unfamiliar, start with how wagering requirements work.

Excluded games and the confiscation risk

There is a meaningful difference between a game weighted at 0% and a game listed as excluded or restricted.

A 0% game usually just fails to contribute — you burn balance for no progress, which is wasteful but not a breach. An excluded game is a rule violation. Depending on the operator's terms, playing one while a bonus is active can void the bonus, void winnings derived from it, or in strict wording void the entire balance. Some platforms block the game automatically; many do not, and the responsibility sits with the player.

Bet caps interact with this too. Most bonus terms impose a maximum bet per spin or hand while wagering is outstanding, and exceeding it is treated the same way as playing a banned game. Enforcement is retrospective — the check often happens at withdrawal, long after the bets were placed.

Finding the contribution table

• Open the specific offer terms, not the site-wide T&Cs. Campaign terms override the general ones.
• Search the page for the words contribution, weighting, excluded, and eligible games.
• Check whether the table applies per category or per named title — a category can contribute while individual games inside it are carved out.
• Look for a separate list of restricted titles, often published on its own page and updated without notice.
• If you cannot locate a table at all, treat that as a warning sign and ask support in writing before depositing.

Our walkthrough on how to read bonus terms covers where these clauses usually hide.

What this means for how you play

If a bonus is your reason for depositing, the honest conclusion is that you are largely playing slots. That is the category weighting is built around, and any serious deviation multiplies your required turnover.

If you prefer roulette or blackjack, the rational choice is often to skip the bonus entirely and play with cash, where no wagering, no bet cap and no excluded-game clause applies. The comparison between the two styles of play is covered in slots versus table games, and you can filter offers by their terms on our bonus overview.

One last nuance: a high-RTP slot is not automatically the smart wagering choice. It is exactly the profile operators most often exclude, so confirm eligibility before assuming a favourable title counts.

Bonuses are entertainment products with conditions attached, not a route to reliable profit. Play only if you are 18 or over (or the legal age where you live), set deposit, loss and time limits before you start, use only operators licensed in your jurisdiction, and stop if play stops feeling like a choice. Free support services exist in most countries.