The Big Blind (BB) and Small Blind (SB) are two of the most misunderstood positions in poker. They look similar on the surface, both involving a mandatory preflop payment, but they differ in size, position, strategy, and how they affect your long-term win rate. This guide covers everything you need to know.
What Are the Small Blind and Big Blind?
The Small Blind and Big Blind are mandatory bets placed into the pot before any cards are dealt. Two players post one each per hand: the player in the Small Blind position posts the SB, and the player in the Big Blind position posts the BB.
The terms also refer to the poker table positions themselves, not just the bet amounts.
What Is the Difference Between the BB and SB Bets?
The Big Blind is usually twice the size of the Small Blind. In a $1/$2 No-Limit Hold'em game, the SB is $1 and the BB is $2.
That said, the ratio isn't fixed. Some casinos offer $1/$3 stakes, where the BB is three times the SB. A few structures even set both blinds at the same amount. Always check with the dealer if you're unsure of the specific rules at a given table.
For a deeper look at blind sizes across stakes and stack depths, see our poker blinds charts guide.
What Is the Difference Between the BB and SB Positions?
On a standard six-handed or full-ring table:
- The Small Blind sits immediately to the left of the Button.
- The Big Blind sits two positions to the left of the Button, immediately left of the SB.
Preflop, the action starts with the player to the left of the Big Blind (UTG) and moves clockwise. The Small Blind acts second-to-last, and the Big Blind acts last, closing the action. Postflop, the order reverses: the Small Blind acts first, followed by the Big Blind, with all other players acting after them.
This makes the Big Blind the superior of the two positions: it closes preflop action and acts after the Small Blind postflop.
What Is the Difference When Playing Heads-Up?
Heads-up play reverses the usual dynamic. The Small Blind and the Button are the same position, meaning the SB acts last postflop rather than first.
- Small Blind / Button: Acts first preflop, last postflop.
- Big Blind: Acts last preflop, first postflop.
In heads-up play, it's often clearer to think of the two positions as Button and Big Blind, with the mandatory SB payment now falling on the Button.
What Is the Difference Between Blinds and Antes?
Blinds are paid by two specific players each hand. Antes are paid by every player at the table before hole cards are dealt.
Ante amounts are typically smaller than the Small Blind. They're rare in cash games but common in the later stages of poker tournaments, where they increase pressure on shorter stacks and accelerate the action.
Why Are There Blinds in Poker?
Blinds exist to generate action. Without money already in the pot, players could simply wait indefinitely for premium hands before investing anything. The blinds create a prize worth fighting over on every single hand.
Why Is There a Big Blind When There's Already a Small Blind?
Poker could technically function with just one blind, but two blinds means more dead money in the pot before cards are dealt. This makes open-raising more profitable for late-position players, which in turn generates more action and makes the game more enjoyable for everyone at the table.
What Is the Difference Between SB and BB Strategy?
Because the Big Blind has already committed more chips preflop, it gets better pot odds to call a raise than the Small Blind does. As a result, the BB should defend a wider range of hands against open-raises than the SB.
Calling from the Small Blind is complicated by the fact that the Big Blind still acts behind you. The BB can raise, making it harder to see the flop cheaply. The Big Blind doesn't face this problem: it closes the action preflop, so calling a single raise means you're guaranteed to see the flop.
For position-specific strategy:
Where Do the Blind Payments Go?
Both blind payments go directly into the pot, where they can be won preflop or postflop. This dead money is what makes blind stealing a profitable strategy for players in late position.
What Does It Mean to Steal the Blinds?
Stealing the blinds means making an open-raise from the Button, Cutoff, or Small Blind with the goal of winning the posted blinds uncontested. If the players in the blinds fold too often, it becomes profitable to steal with relatively weak hole cards.
What Does It Mean if a Player Has 100 Big Blinds?
Big Blinds are a standard unit for measuring stack depth. Expressing a stack in BBs makes it easy to compare strategy across different stakes levels.
- In a $1/$2 game: 100 BB = $200 | 200 BB = $400
- In a $2/$5 game: 100 BB = $500 | 200 BB = $1,000
Most cash game players buy in for 100 BB as a standard starting stack.
How Do Win Rates From the SB and BB Compare?
Despite the Big Blind being the stronger positional hand, Small Blind win rates are almost always higher than Big Blind win rates. The larger mandatory BB investment is simply too difficult to overcome over the long run.
It's normal, even for strong players, to run at a negative win rate from both blind positions. The structural disadvantage of posting a forced bet before seeing your cards is unavoidable.
Big Blind vs Small Blind: Differences and Similarities
Similarities
- Both are mandatory preflop bets posted before any cards are dealt.
- Both are paid by one specific player each hand.
- Both the payment amount and the table position share the same name.
- Both positions typically produce negative win rates, even for skilled players.
Differences
- Size: The BB is usually twice the SB, though not always.
- Position: The SB is immediately left of the Button; the BB is two to the left.
- Action order: The SB acts before the BB preflop and postflop in standard play.
- Heads-up: The SB merges with the Button and acts last postflop.
- Closing the action: The BB closes preflop action; the SB does not.
- Stack measurement: Stack depth is measured in Big Blinds, not Small Blinds.
- Strategy: The BB defends wider preflop; the SB requires more caution when calling.
Key Takeaways
- The Small Blind and Big Blind are mandatory bets that also describe specific table positions.
- The BB is usually twice the size of the SB, but the exact ratio varies by casino and game format.
- On a standard table, the SB acts before the BB in every street, giving the BB a positional advantage.
- In heads-up play, the SB and Button merge into one position, reversing the postflop action order.
- Antes differ from blinds: antes are paid by every player at the table; blinds are paid by two.
- Stack depth is measured in Big Blinds, not Small Blinds.
- Both blind positions typically produce negative win rates. This is structurally expected, not a sign of poor play.
