What the card is actually recording
A players card is a tracking device, and that is the whole of it. Put it in a slot machine or hand it to a table supervisor, and the property starts building a record of your play under one account number.
What it records is not whether you won. The number the casino computes is theoretical loss, or theo: your average bet, times the pace of the game, times the house edge, times the hours you sat there. A player who wins $2,000 in an hour of $100 blackjack generates the same theo as one who loses $2,000 in the same seat.
On machines the tracking is exact, because the machine sees every coin in. At a table it is a human estimate. A supervisor watches your first few hands, writes down an average bet, and notes when you sat and when you left. Your rating is an approximation made by a person with several tables to watch, and nobody will tell you how generous it was.
Tier credits and comp dollars are different currencies
Nearly every program runs two balances off the same play, and confusing them is the most common mistake made at the desk.
Tier credits measure status. They accumulate over a defined year, decide which tier you sit in, and then reset. Nothing you do spends them. Comp dollars, points or free play measure a balance you can actually use on a room, a meal or more play. Spending that balance does not knock you down a tier, and reaching a tier does not hand you a balance.
Both accrue from the same rated play, at rates the property sets and can change. Two properties inside the same corporate program often convert identical play into each currency at different rates.
What a comp is, and what it is not
A comp is a rebate paid out of money you were expected to lose. The property computes your theo, pays back some fraction of it, and keeps the rest. That fraction is set internally and is not published.
Three things follow, and none of them are subtle:
- The fraction sits below 1 at every property that stays open. Play that generates $400 of expected loss returns less than $400 in benefits, whatever the buffet is priced at.
- A comp is valued at rate card, not at what it is worth to you. A room you would never have booked is worth what a night's sleep is worth, not the published rate.
- Comps are unrelated to results. Losing does not earn them and winning does not forfeit them, because neither appears anywhere in the formula.
The arithmetic behind that, including why playing extra hours to cross a threshold runs backwards, is worked through in casino loyalty tiers.
The card does not change the game
Nothing on the card touches the house edge. A blackjack table paying 6:5 on a natural instead of 3:2 adds about 1.35 percentage points to the edge, and it costs you that whether you are carded or not. A Pass Line bet keeps its 1.41% edge on the same logic: for every $100 of Pass Line action, the house expects to keep about $1.41.
Rated play changes only what comes back afterwards. Pick the game on its edge first, then card it.
Points that hold at any property
- Card everything, including the low-edge bets. The rating system discounts them correctly, and playing uncarded costs you the rebate without lowering the edge you face.
- Free odds behind a Pass Line bet carries no house edge, so most systems do not rate it at all. That is arithmetic, not an oversight.
- Ask a host what an offer is worth in dollars. A number can be set against expected loss; a tier name cannot.
- Check the expiry on free play and mailed offers. A balance that lapses is the quiet way a rebate becomes worth zero.
- Signing up is free in money terms. The price is the personal data and the play history you hand over, which the property keeps.
The honest bottom line
A players card converts part of your expected loss into rooms, food and free play. That value is real, and it is a fraction. Generating more theo to earn more of it has never made anyone money, because the rebate rate has to stay below 1 for the property to exist.
The version that clearly pays is simple. Card the play you were going to make anyway, on the game you would have chosen anyway, and treat whatever comes back as a discount on a trip rather than a reason to extend it.
Terms used above are defined in the glossary, in particular theoretical loss, comp and house edge. If a session stops being entertainment you budgeted for, help is free and confidential.
Where the numbers on this site come from
This article is editorial. The reference sections below derive their figures from the cards, the dice or the pay table rather than quoting them, and each one shows the working:
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First published on this site's WordPress blog between September and December 2025; rewritten to this site's current standard in August 2026.