Every comp you’ll ever receive, from a free buffet to a penthouse suite, traces back to one number: your theoretical loss, usually called your “theo.” Understanding how it’s calculated is the single most useful thing you can learn about getting comped.
The formula
Casinos don’t comp you based on what you actually lose. They comp you based on what you are expected to lose over time, given the game you play and how much you bet:
Theoretical loss = average bet × decisions per hour × hours played × house edge
For example, a blackjack player betting $25 a hand, at roughly 60 hands an hour, for 4 hours, against a house edge the casino rates at about 2%, has a theo of 25 × 60 × 4 × 0.02 = $120.
The casino then returns a percentage of that theo as comps, commonly somewhere in the range of 20% to 40%, depending on the property, the market, and how much it wants your business. So that $120 theo might be worth $25 to $50 in comps.
Why your actual win or loss matters less than you think
Because comps are tied to theo, a player who wins $500 and a player who loses $500 at the same stakes for the same time will usually be rated identically. Some hosts will look at actual losses when deciding discretionary comps, but the system itself is built on theo. That means you don’t have to lose big to be comped well; you have to play in a way that’s rated.
How the casino measures each part
- Slots and video poker: Your player’s card tracks every dollar you put through the machine (“coin-in”). The casino applies the machine’s hold percentage to that coin-in. This is precise and automatic, which is why slot players often find comps easy to earn.
- Table games: A floor supervisor estimates your average bet and time played and enters it into the system. The house edge and hands-per-hour figures are set by the casino, not by your actual skill. That leaves room for judgment, which you can use in your favor (see below).
Ways to improve your rating
- Always use your card. Unrated play earns nothing. Hand it over at the table before you start, and insert it before your first spin.
- Make your first bets count. Supervisors often note your average bet early in a session. A steady, visible bet tends to be rated more accurately than one that jumps around.
- Play at a comfortable pace, not a fast one. Table ratings assume a standard number of hands per hour. At a slower table you’re exposed to fewer decisions but are often rated as if you played the standard number.
- Ask to be rated. It’s a normal request. When you sit down, say “Can you rate me, please?” and when you leave, let the supervisor know.
- Consolidate your play. Theo is tracked per property and per program. Spreading play thinly across many casinos means you’re a small player everywhere.
The golden rule
A comp is a partial rebate on money the casino expects you to lose. Never increase your bets or play longer just to earn one. The best comp strategy is to decide your gambling budget first, then make sure every dollar of it is rated properly.
Comps are a rebate on expected losses, not a reason to gamble more. Set a budget before you play and stick to it. If gambling stops being fun, free and confidential help is available 24/7 from the National Problem Gambling Helpline: call or text 1-800-MY-RESET (1-800-697-3738) or chat at 1800myreset.org.
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