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Blackjack Strategy: Increase Your Odds of Winning

Jack Mitchell
30 November 2024
16 min read
Blackjack Strategy: Increase Your Odds of Winning

Beat the Dealer with Basic Strategy

Blackjack is unique among casino games—it's one of the only games where skill significantly impacts your results. While pokies and roulette are pure luck, blackjack rewards players who understand mathematics and strategy. With perfect basic strategy, you can reduce the house edge to as low as 0.5%, making blackjack one of the most player-friendly games in any casino.

This comprehensive guide teaches you everything you need to know to play blackjack optimally, from basic strategy charts to advanced concepts, bankroll management, and common mistakes to avoid.

Understanding Blackjack Basics

Before diving into strategy, ensure you understand the fundamentals:

Objective: Beat the dealer by getting closer to 21 without going over (busting).

Card Values:

  • Number cards (2-10): Face value
  • Face cards (J, Q, K): Worth 10
  • Aces: Worth 1 or 11 (player's choice)

Hand Types:

  • Hard Hand: No Ace, or Ace counted as 1 (e.g., 10-7 = hard 17)
  • Soft Hand: Ace counted as 11 (e.g., A-6 = soft 17)
  • Pair: Two cards of same value (e.g., 8-8)

Basic Options:

  • Hit: Take another card
  • Stand: Keep current hand
  • Double Down: Double bet, receive one card, then must stand
  • Split: Separate pair into two hands (requires second bet)
  • Surrender: Forfeit hand and recover half your bet (not always available)

What is Basic Strategy?

Basic strategy is a mathematically derived set of rules that tells you the optimal play for every possible hand combination. It was developed using computer simulations running millions of hands to determine which action has the highest expected value.

Benefits of Basic Strategy:

  • Reduces house edge to 0.5% or less
  • Removes guesswork and emotions from decisions
  • Easy to learn and apply
  • Works for any standard blackjack game
  • Significantly increases your winning chances

Without Strategy: House edge of 2-4% (you lose faster)
With Perfect Strategy: House edge of 0.5% (nearly even odds)

Basic Strategy Charts

These charts show the mathematically correct play for every situation. The left column shows your hand, the top row shows the dealer's upcard.

Hard Totals (No Ace or Ace Counted as 1)

Your Hand 2 3 4 5 6 7 8 9 10 A
17+ STAND
13-16 STAND HIT
12 HIT STAND HIT
11 DOUBLE (or Hit)
10 DOUBLE (or Hit) HIT
9 HIT DOUBLE (or Hit) HIT
5-8 HIT

Soft Totals (Ace Counted as 11)

Your Hand 2 3 4 5 6 7 8 9 10 A
A,9 (20) STAND
A,8 (19) STAND
A,7 (18) STAND DOUBLE (or Stand) STAND HIT HIT
A,6 (17) HIT DOUBLE (or Hit) HIT
A,4-5 (15-16) HIT DOUBLE (or Hit) HIT
A,2-3 (13-14) HIT DOUBLE (or Hit) HIT

Pair Splitting

Your Pair 2 3 4 5 6 7 8 9 10 A
A,A SPLIT
10,10 STAND
9,9 SPLIT STAND SPLIT STAND
8,8 SPLIT
7,7 SPLIT HIT
6,6 HIT SPLIT HIT
5,5 DOUBLE (Never Split!)
4,4 HIT SPLIT HIT
3,3 HIT SPLIT HIT
2,2 HIT SPLIT HIT

Key Strategy Rules to Remember

Always Hit On:

  • 8 or less (impossible to bust)
  • Soft 17 or less (A-6, A-5, A-4, A-3, A-2)
  • 12-16 when dealer shows 7 or higher

Always Stand On:

  • Hard 17 or higher (too risky to hit)
  • Soft 19 or higher (strong hand)
  • 12-16 when dealer shows 2-6 (dealer likely to bust)

Always Double Down On:

  • 11 against dealer 2-10
  • 10 against dealer 2-9
  • 9 against dealer 3-6

Always Split:

  • Aces (two chances at 21)
  • 8s (16 is terrible, 8 is better starting point)

Never Split:

  • 10s (20 is an excellent hand)
  • 5s (10 is perfect for doubling)
  • 4s (8 is a good starting total)

Why the Dealer's Upcard Matters

Your strategy changes based on the dealer's visible card because some cards are much more dangerous than others:

Dealer Upcard Bust Probability Strategy Adjustment
2-6 (Weak) 35-42% Stand more; let dealer bust
7-9 (Neutral) 26-23% Play more aggressively
10, A (Strong) 21-17% Assume dealer has strong hand

Dealer Shows 2-6: They're likely to bust, so you can stand on weaker hands (12-16)

Dealer Shows 7+: They probably have a strong hand, so you need to improve yours

Common Mistakes to Avoid

1. Taking Insurance

  • Insurance is a sucker bet with 7.4% house edge
  • Never take insurance, even with a blackjack
  • It's essentially betting the dealer has 10 in the hole
  • Mathematically unfavorable in the long run

2. Playing "Hunches"

  • Ignore gut feelings and follow basic strategy
  • Mathematics beats intuition every time
  • Streaks and patterns are illusions

3. Standing on Soft 17

  • Soft 17 (A-6) should almost always be hit or doubled
  • You can't bust with one card
  • It's only a mediocre hand

4. Splitting 10s

  • 20 is an excellent hand
  • Don't split it hoping for two blackjacks
  • You'll win far more by keeping 20

5. Not Splitting 8s or Aces

  • Always split these, regardless of dealer upcard
  • 16 (pair of 8s) is the worst possible hand
  • Two chances at 21 (with Aces) is valuable

Blackjack Rule Variations

Different blackjack variants have different rules that affect house edge:

Rule Effect on House Edge Player Impact
Blackjack pays 3:2 Standard (0%) ✅ Good - always seek this
Blackjack pays 6:5 +1.4% ❌ Bad - avoid these tables
Dealer stands S17 -0.2% ✅ Good for player
Dealer hits S17 +0.2% ⚠️ Slightly worse
Double any two cards -0.2% ✅ Good flexibility
Double after split -0.1% ✅ Beneficial
Resplit Aces -0.06% ✅ Helpful
Late Surrender -0.07% ✅ Good option to have
More decks (1 to 8) +0.5% ⚠️ Fewer decks better

Best Rules Combination: 3:2 blackjack, dealer stands soft 17, double after split, late surrender = 0.3-0.4% house edge

Bankroll Management for Blackjack

Session Bankroll

  • Bring 40-50 times your minimum bet
  • Example: $5 minimum = $200-250 bankroll
  • This gives you cushion for variance
  • Prevents going broke during normal swings

Bet Sizing

  • Keep bets consistent (flat betting)
  • Don't increase bets after losses (Martingale doesn't work)
  • Don't decrease bets after wins
  • Bet the table minimum for longest play and lowest risk

Win/Loss Limits

  • Win Goal: 50% of bankroll (quit at $300 if started with $200)
  • Loss Limit: 50% of bankroll (quit at $100 if started with $200)
  • Stick to limits to avoid giving back wins or chasing losses

Card Counting: Online vs. Live

Land-Based Casinos

Card counting works in physical casinos because:

  • Same deck(s) used for multiple hands
  • Card composition changes as cards are dealt
  • You can gain a small edge (0.5-1.5%) with perfect counting

Online Casinos

Card counting is IMPOSSIBLE online because:

  • Virtual blackjack shuffles after every hand
  • RNG generates random outcomes
  • No continuous shoe to track
  • Even live dealer online usually shuffles frequently

Bottom Line: Focus on perfect basic strategy for online play, not counting.

Blackjack Side Bets

Many blackjack variants offer side bets. Generally, avoid them—they have much higher house edges:

Side Bet House Edge Recommendation
Insurance 7.4% ❌ Never take
Perfect Pairs 3-10% ❌ Skip it
21+3 3-7% ❌ Not worth it
Lucky Ladies 17-25% ❌ Terrible odds

Side bets are designed to increase house profits. Stick to the main game for best odds.

Practice Makes Perfect

How to Learn Basic Strategy:

  1. Start with the simplest rules: Always hit 8 or less, always stand 17+
  2. Add dealer-dependent plays: Stand 12-16 vs. dealer 2-6
  3. Learn soft hands: Master the A-6, A-7, A-8 decisions
  4. Master splitting: Always split 8s/Aces, never split 10s/5s
  5. Add doubling: 11 vs. 2-10, 10 vs. 2-9, 9 vs. 3-6
  6. Practice free games: Use demo mode to drill strategy
  7. Use strategy cards: Keep a chart handy while playing online

Practice Resources:

  • Free online blackjack simulators
  • Strategy trainer apps (quiz you on correct plays)
  • Printable strategy charts
  • Demo modes at online casinos

Final Tips for Blackjack Success

  • Always use basic strategy - no exceptions, no hunches
  • Never take insurance - even with blackjack
  • Avoid 6:5 blackjack - only play 3:2 payout games
  • Manage your bankroll - don't bet more than you can afford
  • Take breaks - fatigue leads to mistakes
  • Don't drink while playing - alcohol impairs decision-making
  • Ignore other players - their bad plays don't affect your odds
  • Stay disciplined - stick to strategy even during losing streaks

Conclusion

Blackjack is the rare casino game where skill truly matters. By mastering basic strategy, you can reduce the house edge to less than 1%—better odds than any pokie, roulette, or most table games. While you won't win every session (variance is part of gambling), you'll maximize your chances and minimize losses over time.

The strategy charts might seem complex at first, but with practice, the correct plays become second nature. Print out the charts, practice in free-play mode, and gradually internalize the decisions. Before long, you'll be playing near-perfect blackjack and giving yourself the best possible odds.

Remember: blackjack rewards patience, discipline, and mathematical play. Leave emotions and hunches at the door, follow basic strategy, and enjoy one of the most player-friendly games the casino has to offer! Try live dealer blackjack for the most authentic experience.

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About Jack Mitchell

Jack Mitchell is a veteran of the Australian gambling industry with over 15 years of experience reviewing online casinos. Based in Melbourne, Jack has tested hundreds of casino sites and games to help Aussie punters find the best places to play.