Basic Strategy
The mathematically optimal way to play every hand.
Basic strategy is the mathematically optimal way to play every possible blackjack hand. It was developed by computer simulations of millions of hands and tells you exactly when to hit, stand, double, or split. Using perfect basic strategy reduces the house edge to around 0.5%.
Good to Know
Blackjack House Edge by Strategy
Strategy dramatically reduces the house advantage
Why Basic Strategy Works
Every blackjack decision can be mathematically analyzed based on:
- Your hand total
- The dealer's upcard
- Number of decks in play
Basic strategy tells you the play that loses the least (or wins the most) money over time. It doesn't guarantee you'll win each hand—it guarantees you're playing optimally.
Hard Totals
A hard hand contains no Ace, or an Ace counted as 1.
Hard Totals Strategy
| Your Total | Dealer 2-6 | Dealer 7-A |
|---|---|---|
| 8 or less | Hit | Hit |
| 9 | Double if 3-6, else Hit | Hit |
| 10 | Double if 2-9, else Hit | Hit |
| 11 | Double | Double (Hit vs A) |
| 12 | Stand 4-6, else Hit | Hit |
| 13-16 | Stand | Hit |
| 17+ | Stand | Stand |
Soft Totals
A soft hand contains an Ace counted as 11.
Soft Totals Strategy
| Your Total | Dealer 2-6 | Dealer 7-A |
|---|---|---|
| Soft 13-14 | Double 5-6, else Hit | Hit |
| Soft 15-16 | Double 4-6, else Hit | Hit |
| Soft 17 | Double 3-6, else Hit | Hit |
| Soft 18 | Double 3-6, Stand 2,7,8 | Hit 9,10,A |
| Soft 19+ | Stand | Stand |
Pairs
When to split pairs:
Pair Splitting Strategy
| Your Pair | Action |
|---|---|
| A-A | Always Split |
| 8-8 | Always Split |
| 10-10 | Never Split (Stand) |
| 5-5 | Never Split (Double or Hit) |
| 4-4 | Split 5-6, else Hit |
| 2-2, 3-3 | Split 2-7, else Hit |
| 6-6 | Split 2-6, else Hit |
| 7-7 | Split 2-7, else Hit |
| 9-9 | Split 2-9 except 7, Stand 7/10/A |
Strategy Insight
When to Double Down
Doubling down lets you double your bet for one more card. Double when:
- Hard 11 – Against any dealer card (except A in some games)
- Hard 10 – Against dealer 2-9
- Hard 9 – Against dealer 3-6
- Soft hands – Against weak dealer cards (3-6 mostly)
Pro Tip
When to Surrender
If your casino offers late surrender:
- Hard 16 vs dealer 9, 10, or A – Surrender
- Hard 15 vs dealer 10 – Surrender
Surrendering returns 50% of your bet. It's better than playing out a hand you'll likely lose.
Insurance: Just Say No
Warning
Rule Variations
Adjust strategy slightly based on rules:
- Dealer hits soft 17 – Slightly worse for player
- Double after split allowed – More aggressive splitting
- Number of decks – Fewer decks = more doubling
Strategy Insight
Key Takeaways
- 1Basic strategy is mathematically proven optimal for every situation
- 2Always split Aces and Eights; never split Tens or Fives
- 3Double down when you have advantage (11, 10, soft hands vs weak dealer)
- 4Never take insurance—it's always -EV
- 5Using perfect basic strategy reduces house edge to ~0.5%
Sources & References
- Basic strategy charts are derived from computer simulation of millions of hands, first computed by Baldwin, Cantey, Maisel, and McDermott in "The Optimum Strategy in Blackjack" (Journal of the American Statistical Association, 1956). Results are independently verifiable through Monte Carlo simulation.
- Professional Blackjack. Stanford Wong, Professional Blackjack (1975, revised editions through 2000s). Refined basic strategy tables for specific rule sets and deck counts, establishing the standard reference charts used by players worldwide.
- House edge reduction from 2-5% (uninformed play) to approximately 0.5% (perfect basic strategy) is independently verifiable through expected value analysis across all 550+ distinct player-dealer hand combinations.
- Insurance bet expected value: pays 2:1 but true odds of dealer blackjack are 9:4 against (4 tens per 13 cards), yielding a house edge of approximately 7.4%. Independently verifiable from standard deck composition.
Mathematical claims are independently verifiable. BonusBell platform analysis reflects data from 220+ tracked platforms as of March 2026.