Blackjack basic strategy: when to stand, hit, double, or split

Blackjack basic strategy is a decision-making system based on the cards you hold and the dealer’s visible card. It does not predict the next card or guarantee a winning session. Instead, it identifies the mathematically strongest move for common situations, helping you avoid impulsive choices and reduce the house edge over a large number of hands.

The correct action can change with small rule differences, including whether the dealer stands or hits on soft 17, whether doubling after splitting is permitted, and how many decks are used. Australian players should also consider where a game is offered, what protections apply, and whether online casino gambling is lawful under the relevant Australian rules.

How the dealer’s card changes your decision

The dealer’s upcard is central to every blackjack hand. A dealer showing 2 through 6 is considered vulnerable because the hand has a higher chance of going bust while drawing to at least 17. A dealer showing 7 through ace is stronger, so you usually need to improve your own hand rather than wait for the dealer to fail.

With a hard total of 12 to 16, standing is often sensible when the dealer shows 2 to 6. Hitting these totals against a 7, 8, 9, 10 or ace is generally preferable because simply standing leaves you relying on a weak total. A hard 17 or higher is normally a stand, while a total of 8 or less usually requires another card.

This is why the same hand can require different treatment. Hard 16 against a dealer 6 is commonly a stand, but hard 16 against a dealer 10 is usually a hit. The recommendation feels uncomfortable in both cases, yet the dealer’s bust risk changes the expected value of the decision.

Understanding hard and soft totals

A hard hand contains no ace, or an ace that must count as 1 to prevent a bust. For example, 10 and 6 is hard 16. If you hit and receive a 7, the hand becomes 23 and loses immediately. Hard hands therefore require careful attention to both the total and the dealer’s exposed card.

A soft hand contains an ace counted as 11 without exceeding 21. Ace and 6 is soft 17, because it can be treated as 17 or 7. Soft hands are more flexible: drawing a high card may not cause an immediate bust, since the ace can switch from 11 to 1.

Soft 13 through soft 15 are often hit, while soft 17 is commonly hit against most dealer cards. Soft 18 is a more interesting hand: it is frequently stood on against 2, 7 and 8, hit against 9, 10 and ace, and doubled in selected favourable situations. Soft 19 is generally a stand, with doubling sometimes recommended against a dealer 6 under particular rule sets.

When hitting or standing makes sense

Hitting means taking another card, and it is usually correct when your total is too weak to compete or when the dealer has a strong upcard. Hard 9, 10 and 11 are often candidates for doubling rather than an ordinary hit, because the player has a reasonable chance of improving with one card while increasing the stake.

Standing means taking no further cards. It is usually correct with hard 17 or more, although a few rule-dependent exceptions exist. With totals from 12 to 16, standing is most attractive against a dealer 2 to 6. The aim is not to create a strong hand; it is to let the dealer take the greater risk of busting.

A common mistake is standing automatically on 16 because another card might bust. Basic strategy treats the dealer’s situation as part of the calculation. If the dealer displays a 10, the chance of losing by standing is already substantial, so taking a card can be the less damaging choice even when the result may be uncomfortable.

When to double down

Doubling down means doubling the original wager in exchange for receiving one additional card, after which you must stand. It is strongest when your hand is likely to improve and the dealer is comparatively weak.

Hard 9 is commonly doubled against a dealer 3 to 6, hard 10 against 2 to 9, and hard 11 against most dealer cards. Exact recommendations vary where the dealer hits soft 17 or where the game has unusual payout rules. Soft hands can also be doubled: soft 13 to soft 18 may qualify against selected dealer cards, especially 4, 5 or 6.

The value of doubling depends on table rules and bankroll discipline. A player should have enough available funds for the increased wager and should understand that one favourable-looking opportunity does not justify chasing previous losses. In live venues around Melbourne or Perth, table minimums can make doubling materially different from a low-stakes online hand, so the betting unit should be chosen before play begins.

When to split pairs

Splitting turns a pair into two separate hands, with a second wager matching the first. It is generally correct to split aces and 8s. Two aces offer a chance to build two strong starting hands, while 16 made from two 8s is a poor total that improves when separated.

Never splitting 10s is a well-known basic strategy rule. A total of 20 is already excellent, and dividing it creates two hands that are less likely to finish as strongly. Splitting 5s is also usually wrong because 10 is a strong doubling total; treat the pair as a hard 10 instead.

Other pairs depend on the dealer’s upcard. Twos, threes and sevens are often split against weaker dealer cards, while nines are split in selected cases, commonly against 2 through 6 and 8 or 9. The details can change if the casino restricts doubling after a split, limits the number of splits, or treats split aces as receiving only one card.

Rules, Australian conditions and responsible play

A strategy chart should match the game being played. Check the blackjack payout, number of decks, dealer action on soft 17, surrender availability, doubling restrictions and split rules. A 3:2 blackjack payout is generally more favourable to the player than 6:5. Side bets such as insurance or perfect pairs have separate mathematics and are usually less attractive than the main blackjack wager.

Australia has a distinctive legal environment. The Interactive Gambling Act 2001 restricts the provision of online casino services to Australians, although offshore websites may still market themselves to Australian residents. Domestic casinos in locations such as Sydney, Brisbane and Adelaide operate under state or territory regulation, while online wagering products are governed differently. Players should verify licensing, identity checks, payment conditions and dispute processes rather than assuming an offshore site offers the same safeguards as a local venue.

Everyday gambling habits also matter. A player in Sydney stopping at a venue after work, or someone in regional Queensland using a mobile phone late at night, may experience different triggers and spending patterns. Set a fixed entertainment budget, avoid borrowing, keep gambling separate from rent and household money, and use deposit or loss limits where available. Take breaks and record actual spending rather than relying on memory.

Basic strategy cannot remove gambling risk. If play becomes difficult to control, Australian support is available through Gambling Help Online and state-based counselling services. Self-exclusion programs, bank gambling blocks and trusted-person support can add practical barriers. Blackjack should remain a limited form of entertainment, never a method for paying bills or recovering losses.

Use a strategy chart matched to the exact rules of your chosen game, practise with free play without attaching real-money stakes, and check the legal and consumer-protection position before depositing. Keep sessions within a pre-set time and money limit, and step away whenever gambling stops feeling controlled.