Blackjack Basic Strategy Explained: When to Hit, Stand, Double or Split
Learn how blackjack basic strategy works, when to hit, stand, double down or split, and why mathematically correct decisions can reduce the house edge.
Blackjack Basic Strategy Explained: When to Hit, Stand, Double or Split
Blackjack basic strategy is a mathematically calculated set of decisions that tells you the best action to take for different player hands and dealer upcards.
It does not guarantee that you will win a particular hand, but it can help reduce the house edge by avoiding weaker decisions over time.
If you are new to the game, start with our beginner's guide to blackjack, which covers the rules, card values and payouts.
What Is Blackjack Basic Strategy?
Basic strategy is a decision-making system based on the mathematics of blackjack.
For every possible combination of your hand and the dealer's visible card, there is a statistically preferred action.
That action may be:
Hit
Stand
Double down
Split
In some situations, surrender may also be part of the strategy if the table allows it.
Why Does Basic Strategy Matter?
Blackjack is different from many casino games because the decisions you make can affect the expected return of the game.
For example, choosing to hit when the mathematically stronger action is to stand can increase the casino's advantage over time.
Basic strategy is designed to minimize those mistakes.
Does Basic Strategy Guarantee a Win?
No.
Basic strategy improves decision quality, but it cannot control which cards are dealt.
You can make the mathematically correct decision and still lose the hand.
Likewise, you can make a poor decision and still win occasionally.
The purpose of basic strategy is to improve expected results across a very large number of hands.
How Does Basic Strategy Work?
The recommended decision depends on two main pieces of information:
Your current hand
The dealer's visible card
For example, a hard 16 against a dealer 6 is very different mathematically from a hard 16 against a dealer 10.
That is why there is no single rule such as "always stand on 16."
Hard Hands, Soft Hands and Pairs
Basic strategy is usually divided into three main categories:
| Hand Type | Meaning |
|---|---|
| Hard Hand | A hand with no ace counted as 11. |
| Soft Hand | A hand containing an ace that can still count as 11 without busting. |
| Pair | Two cards of the same rank or value that may be eligible to split. |
Basic Strategy for Hard Hands
A hard hand has no flexible ace value.
Some of the most common basic-strategy principles include:
Stand on hard 17 or higher.
Hit hard 8 or lower.
Hard 12 to 16 often depends heavily on the dealer's upcard.
Hard 9, 10 and 11 can often be doubling situations depending on the dealer's card and table rules.
The exact action can vary depending on the rules of the game.
Why Dealer Upcards Matter
The dealer's visible card gives information about the strength of their starting position.
Dealer cards are often thought of in broad groups:
2 to 6: weaker dealer upcards
7 to Ace: stronger dealer upcards
When the dealer shows a weaker card, the strategy often favors standing on more medium-strength hands because the dealer has a greater chance of busting.
Against stronger dealer cards, the player may need to take more risk to improve the hand.
Example: Hard 16 vs Dealer 6
Imagine you have:
10 + 6 = Hard 16
and the dealer shows a 6.
In many standard blackjack rule sets, basic strategy recommends standing.
The reason is that the dealer's 6 is a relatively weak upcard and has a meaningful chance of leading to a dealer bust.
Example: Hard 16 vs Dealer 10
Now imagine the same player hand:
Hard 16
but the dealer shows a 10.
This is a much stronger dealer position.
Under many standard rule sets, basic strategy recommends hitting rather than standing, unless surrender is available and preferred under that specific ruleset.
Basic Strategy for Soft Hands
Soft hands contain an ace that can count as 11.
This flexibility makes them safer to hit because drawing a high card may cause the ace to switch from 11 to 1 instead of immediately busting the hand.
For example:
Ace + 6 = Soft 17
If you draw a 10, the hand becomes:
Ace + 6 + 10 = 17
The ace changes from 11 to 1.
Should You Hit or Stand on Soft 17?
For the player, soft 17 is generally not considered a strong final hand.
Basic strategy often recommends hitting or doubling depending on the dealer's card and the table rules.
This is different from the dealer's soft-17 rule, which determines whether the dealer must hit or stand on a soft 17.
When Should You Double Down?
Doubling down increases your wager and gives you one additional card.
Basic strategy often recommends doubling when the player's hand is strong enough to benefit from one additional card while the dealer's upcard is relatively weak.
Common doubling situations can include:
Hard 9 against certain dealer cards
Hard 10 against many lower dealer cards
Hard 11 against many dealer upcards
Certain soft hands against weaker dealer cards
The exact strategy depends on the number of decks and table rules.
When Should You Split Pairs?
Splitting turns one pair into two separate hands.
Some pair-splitting principles are especially well known.
Always Split Aces
Two aces together equal either 2 or 12, which is a weak starting hand.
Splitting them gives each ace the chance to receive a 10-value card and create a strong hand.
Always Split 8s
A pair of 8s gives a hard 16, one of the most difficult hands in blackjack.
Splitting creates two separate hands starting with 8 instead.
Usually Do Not Split 10s
Two 10-value cards already give you 20, which is one of the strongest possible blackjack hands.
Splitting a 20 usually sacrifices a very strong hand for two weaker starting positions.
Basic Pair-Splitting Overview
| Pair | General Basic-Strategy Idea |
|---|---|
| A-A | Usually split. |
| 8-8 | Usually split. |
| 10-10 | Usually stand. |
| 5-5 | Usually treated as a hard 10 rather than split. |
Other pairs depend more heavily on the dealer's upcard.
Why You Usually Shouldn't Split 5s
A pair of 5s gives you a total of 10.
Ten is a strong doubling hand in many situations.
Splitting the pair would instead create two weaker hands starting with 5.
What About Insurance?
Insurance is a separate bet offered when the dealer shows an ace.
Under standard blackjack mathematics, basic strategy generally does not recommend taking insurance.
The reason is that the payout usually does not compensate for the probability that the dealer actually has blackjack.
This can change in advanced card-counting situations, but that is separate from normal basic strategy.
Does Basic Strategy Depend on the Number of Decks?
Yes.
Basic strategy can vary slightly depending on whether the game uses:
Single deck
Double deck
Four decks
Six decks
Eight decks
The core principles remain similar, but some specific hit, stand, double and split decisions can change.
Does the Dealer Soft-17 Rule Matter?
Yes.
Some tables require the dealer to:
Stand on soft 17
while others require the dealer to:
Hit soft 17
This affects the house edge and can change some basic-strategy decisions.
Does a 3:2 or 6:5 Blackjack Payout Affect Strategy?
The payout rule primarily affects the overall value of the game rather than most individual basic-strategy decisions.
A 3:2 blackjack generally provides better player value than a 6:5 payout.
Our blackjack beginner's guide explains these payout formats in more detail.
Can Basic Strategy Remove the House Edge?
No.
Basic strategy can reduce the house edge significantly under favorable blackjack rules, but it does not normally eliminate it completely.
The exact house edge depends on:
Table rules
Number of decks
Blackjack payout
Dealer soft-17 rule
Doubling restrictions
Splitting rules
Whether the player follows basic strategy accurately
Basic Strategy vs Card Counting
Basic strategy and card counting are not the same thing.
Basic strategy tells you the mathematically preferred action based on your hand and the dealer's upcard.
Card counting attempts to track the changing composition of cards remaining in the deck or shoe.
Basic strategy can be used without counting cards.
Can You Memorize Basic Strategy?
Yes.
Many players use a basic-strategy chart until the most common decisions become familiar.
The chart is usually divided into:
Hard totals
Soft totals
Pairs
The dealer's visible card is shown across the other side of the chart.
Simple Blackjack Basic Strategy Rules to Remember
While a full chart is more precise, a few broad principles are easy to remember:
Stand on hard 17 or higher.
Hit hard 8 or lower.
Always split aces and 8s under standard rules.
Do not split 10s.
Do not split 5s; treat them as a hard 10.
Dealer 2 to 6 is generally weaker than dealer 7 to Ace.
Insurance is generally not part of standard basic strategy.
These are broad rules and should not replace a strategy chart for every possible situation.
Why Basic Strategy Still Loses Sometimes
Blackjack contains randomness.
You can follow basic strategy perfectly and still experience losing hands or losing sessions.
Basic strategy deals with expected value across many hands, not guaranteed short-term outcomes.
This is similar to how RTP in slots describes long-term mathematics without predicting one specific session.
Should Beginners Learn Basic Strategy?
If you want to play blackjack, understanding basic strategy is useful because the game requires real decisions.
At minimum, beginners should understand:
Hard vs soft hands
When hitting becomes dangerous
Why dealer upcards matter
Basic splitting rules
How doubling down works
Frequently Asked Questions About Blackjack Basic Strategy
What is blackjack basic strategy?
It is a mathematically calculated system that identifies the preferred hit, stand, double or split decision for different player hands and dealer upcards.
Does basic strategy guarantee winning blackjack?
No. It improves expected decision quality but cannot control the cards that are dealt.
Should you always split aces?
Under standard blackjack basic strategy, splitting aces is generally recommended.
Should you always split 8s?
Under standard rules, basic strategy generally recommends splitting 8s.
Should you split 10s?
Usually no. A total of 20 is already a very strong hand.
Should you take insurance?
Standard basic strategy generally recommends against insurance because of its mathematical house edge.
Does basic strategy change between blackjack tables?
Yes, some decisions can change depending on the number of decks, dealer rules, doubling options and other table conditions.
Use Mathematics, Not Guesswork
Blackjack basic strategy does not make the game predictable, but it removes much of the guesswork from player decisions.
Instead of deciding based on instinct, you can use the mathematical relationship between your hand and the dealer's visible card.
For the fundamentals, read our complete beginner's guide to blackjack.
Play responsibly and only gamble with funds you can afford to lose.
