How to Play Blackjack: Rules, Strategy, and Odds
Blackjack is one of the few casino games where what you do at the table directly affects the outcome. This guide covers the full blackjack rules, how decisions work round by round, the blackjack dealer rules you need to understand, and how a basic strategy chart brings the house edge down to around 0.58% — which corresponds to the 99.42% RTP achievable with optimal play on this G.Games version.
The Objective and Card Values
The goal in blackjack is straightforward: build a hand value closer to 21 than the dealer without exceeding it. Going over 21 is a bust, and a bust is an immediate loss regardless of what the dealer holds. Number cards are worth their face value. Face cards — Jack, Queen, King — are each worth 10. An Ace counts as 11 unless that would cause a bust, in which case it counts as 1.
A "blackjack" is a two-card hand of an Ace plus any 10-value card. It pays 3:2 in standard rules, which is meaningfully better than a standard win. Always verify the payout ratio before you sit down, because some tables pay only 6:5 on blackjack — a change that roughly doubles the house edge on its own.
How a Round Works
The Deal
You place your bet before any cards are dealt. Each player receives two cards face up. The dealer receives one card face up and one face down — the hole card. If the dealer's upcard is an Ace, you may be offered Insurance, a side bet that pays 2:1 if the dealer has blackjack. In practice, Insurance has poor expected value and basic strategy advises declining it.
Your Decisions
Once dealt, you choose from the following actions on each hand:
- Hit — take another card. You can keep hitting until you stand or bust.
- Stand — accept your current total and end your turn.
- Double Down — double your initial bet and receive exactly one more card. This is most powerful on totals of 9, 10, or 11 against weak dealer upcards.
- Split — if your two cards are of equal value, you can split them into two separate hands, each with its own bet. Pairs of Aces and 8s are always split in basic strategy; pairs of 10s are never split.
- Surrender — available in some variants, this lets you forfeit half your bet rather than play out a losing hand. It is correct to surrender hard 16 against a dealer 9, 10, or Ace.
Blackjack Dealer Rules
The dealer has no discretion. Blackjack dealer rules are fixed: the dealer must hit on any total of 16 or below, and must stand on 17 or above. Some tables use a "soft 17" rule where the dealer also hits on a soft 17 (Ace plus 6). Hitting on soft 17 increases the house edge slightly, so standing on soft 17 is the more player-favourable rule. Check which variant applies before you play — the main blackjack variants differ on this point.
Blackjack Basic Strategy Explained
Basic strategy blackjack is the mathematically optimal set of decisions for every possible player hand versus every possible dealer upcard. It does not guarantee a win on any individual hand — that is impossible in a game with random outcomes — but it minimises the house edge over time. Deviating from it costs you expected value on every incorrect decision.
How to Read a Blackjack Strategy Chart
A blackjack basic strategy chart is a grid. The rows represent your hand total or hand type. The columns represent the dealer's upcard (2 through Ace). The cell where your row and column intersect tells you the correct action: H (Hit), S (Stand), D (Double Down), P (Split), or Su (Surrender). Using the chart in full — not just for "close calls" — is what achieves the sub-0.6% house edge.
Key Strategy Rules to Memorise
If you are learning blackjack perfect strategy and cannot yet use the full chart from memory, these high-impact rules cover the most common situations:
- Always stand on hard 17 and above.
- Always hit hard 8 or below.
- Double down on hard 11 against any dealer card except an Ace (rule varies by table).
- Double down on hard 10 against dealer 2–9.
- Never split 10s or 5s.
- Always split Aces and 8s.
- Stand on hard 12–16 when the dealer shows 2–6; hit when the dealer shows 7 or higher.
- With a soft hand (Ace included), hit or double down aggressively — you cannot bust in one card.
Blackjack Odds: What the Numbers Mean
Blackjack odds are driven by the composition of the deck, the number of decks in play, and the specific table rules. The G.Games version of blackjack offers an RTP of up to 99.42% under optimal basic strategy blackjack — which is equivalent to a house edge of roughly 0.58%. That is among the lowest house edges of any RNG casino game.
| Decision scenario | Correct basic strategy action | Why it matters |
|---|---|---|
| Hard 16 vs dealer 10 | Surrender (if available), else Hit | Expected loss is lower than standing |
| Soft 18 vs dealer 9 | Hit | Standing is a common and costly mistake |
| Hard 11 vs dealer 6 | Double Down | Maximum expected value on a strong position |
| Pair of 9s vs dealer 7 | Stand | 18 beats dealer's likely 17; splitting loses value |
| Pair of 8s vs dealer Ace | Split (Surrender if allowed) | Hard 16 is the worst hand in blackjack |
Two factors that inflate the house edge independent of your decisions: a 6:5 blackjack payout (instead of 3:2) and the dealer hitting soft 17. Avoid tables with either rule where possible. For a full breakdown of the numbers, see our blackjack overview which covers RTP in more detail.
Common Mistakes and How to Avoid Them
Playing on Instinct Instead of Strategy
The most expensive habit at a blackjack table is making decisions based on gut feel or superstition. "I feel like the dealer has a 10 underneath" is not a useful input. The blackjack strategy chart already accounts for all possible hole card values probabilistically. Using it removes emotion from the equation.
Mismanaging the Bankroll
Even with near-perfect strategy, variance means you will have losing sessions. Set a session loss limit before you sit down, and treat it as a firm ceiling rather than a suggestion. Chasing losses by increasing bet size is the fastest route to losses well beyond what the house edge alone would produce.
Taking Insurance
Insurance looks like protection but it is a separate side bet with a house edge of around 7% in a standard game. Basic strategy blackjack is unambiguous: never take Insurance unless you are counting cards at an advanced level — which does not apply in an RNG environment.
Practising the Blackjack Guide Before Playing for Real
The most effective way to internalise the blackjack basic strategy chart is repetitive practice against a live hand — working through every combination of player total and dealer upcard until the correct response is automatic. Many players use printed strategy cards when they start, and in a physical casino this is generally permitted. In an RNG environment you can simply have the chart open alongside the game window.
If you are ready to find a licensed venue to put this blackjack guide into practice, our guide to where to play blackjack covers what to look for in an offshore-licensed operator available to Australians in 2026, including payment methods and player protections.
Responsible Play
Blackjack with optimal strategy has a low house edge, but a low edge is not the same as no edge. Every session carries the risk of loss. Set time and money limits before you start, and stick to them. If gambling stops feeling like entertainment, free confidential support is available through Gambling Help Online on 1800 858 858. You can also register with BetStop, Australia's National Self-Exclusion Register, to restrict access across licensed platforms.
Frequently Asked Questions
What does basic strategy actually achieve?
Blackjack basic strategy reduces the house edge to its mathematical minimum — around 0.58% in the G.Games version, equating to a 99.42% RTP. It does not eliminate the house edge or guarantee wins; it ensures you are making the highest expected-value decision in every situation.
Can I use a strategy chart while playing online?
Yes. In an online RNG environment there is no restriction on referencing a blackjack strategy chart during play. Using one is the single most practical step you can take to improve your results.
What are the blackjack dealer rules I need to know?
The dealer must hit on 16 or below and stand on hard 17 and above. At some tables the dealer also hits on soft 17 (Ace plus 6), which marginally increases the house edge. The dealer has no choices — the rules are fixed, which is why basic strategy can be calculated precisely.
Is blackjack perfect strategy different from basic strategy?
They refer to the same thing. "Perfect strategy" and "basic strategy" both describe the mathematically optimal play for every hand. The distinction sometimes made is that perfect strategy includes surrender and composition-dependent exceptions; for most players, a standard basic strategy chart covers the overwhelming majority of the expected-value gain.
