Blackjack basic strategy tells you when to hit, stand, double down, split, or surrender based on your hand, the dealer’s upcard, and the table’s rules. It improves decisions, but it cannot guarantee a winning hand or session.
My first piece of blackjack strategy advice comes before any of those decisions: read the rules. Memorizing a chart is useful. Memorizing a chart for a game you are not actually playing is considerably less useful.
This guide builds on our blackjack guide, with charts for a common multi-deck game, rule comparisons, and the exceptions worth checking before you bet.
What Blackjack Basic Strategy Does
Basic strategy selects the action with the best expected return under specified rules. With a favorable hand, that can mean taking advantage of an opportunity. With an ugly hand, it may mean choosing the option expected to lose the least.
I think that second point is the hardest part for beginners to accept. A recommended hit is not a prediction that a helpful card is coming. A recommended split is not a promise that both new hands will win.
Judge the decision separately from the result. Busting after a correct hit does not make the hit wrong, just as winning after a poor decision does not make that decision good.
Ordinary basic strategy uses your hand and the dealer’s upcard without requiring you to track previously dealt cards. Specialized approaches can consider hand composition or the remaining shoe, but they are not where I would start.
Basic strategy generally reduces the casino’s advantage; it does not normally eliminate it. Playing longer does not guarantee that losses will reverse.
Check the Table Rules Before Choosing a Chart
The word “blackjack” on the felt is not enough information. Check these rules before playing:
- Blackjack payout: An eligible natural paying 3:2 is better for you than the same natural paying 6:5. These ratios describe profit, separate from the returned original stake.
- Deck count: Single-deck, double-deck, and multi-deck games can require different decisions.
- Dealer soft 17: S17 means the dealer stands on soft 17. H17 means the dealer hits it. A soft 17 contains an ace counted as 11, such as ace-6.
- Doubling restrictions: Can you double on any initial two-card hand, or only on specified totals?
- Double after split: DAS means doubling is allowed on eligible hands after splitting. That permission changes some pair decisions.
- Surrender: Is it offered, and is it early or late surrender?
- Dealer blackjack procedure: Does the dealer check for blackjack before you split or double? If not, which additional wagers can a later dealer blackjack take?
- Splitting restrictions: How many hands may you create? Can you resplit aces, hit split aces, or double on them?
BlackjackInfo’s basic strategy engine provides settings for deck count, soft 17, doubling, surrender, and hole-card procedures. My advice is to choose the rules first and study the resulting chart, rather than treating the first chart you find as universal.
Basic Blackjack Strategy Charts: Multi-Deck S17
The charts below apply to a four- to eight-deck game with these rules:
- The dealer stands on soft 17, or S17.
- You may double on any initial two cards.
- Doubling after splitting is allowed, or DAS.
- The dealer checks for blackjack with an ace or ten-value upcard before your double or split decisions, protecting those additional wagers from a dealer natural.
These are total-based reference charts, not a universal strategy for every blackjack variant or specialized hand-composition situation. Split-ace restrictions still govern what you may do after splitting aces.
Decision order: Check late surrender first when available, then pairs, then soft hands, then hard hands.
In the tables, 10 means any ten-value dealer upcard, including a jack, queen, or king. A means an ace. Double only when the rules permit it.
1. Late Surrender, When Available
For the S17 game described above:
- Surrender an initial hard 16 against a dealer 9, 10, or ace, except when your hand is a pair of 8s.
- Surrender an initial hard 15 against a dealer 10.
Late surrender means giving up half your original wager after dealer blackjack has been ruled out. If surrender is unavailable, use the appropriate pair or total-based chart below.
Do not apply this list to early surrender or assume you can surrender after taking a card. Personally, I would rather learn the surrender rule before the hand than discover halfway through that the option is unavailable.
2. Pair Strategy: When to Split
| Your pair | Play against the dealer’s upcard |
|---|---|
| Aces | Split against every upcard. |
| 10s | Stand against every upcard. |
| 9s | Split against 2–6, 8, and 9. Stand against 7, 10, and ace. |
| 8s | Split against every upcard. |
| 7s | Split against 2–7. Hit against 8, 9, 10, and ace. |
| 6s | Split against 2–6. Hit against 7 through ace. |
| 5s | Do not split. Play as hard 10: double against 2–9, and hit against 10 or ace. |
| 4s | Split against 5 and 6. Hit against every other upcard. |
| 2s and 3s | Split against 2–7. Hit against 8, 9, 10, and ace. |
These recommendations depend on the stated rules, particularly DAS. If you cannot split, use the hand’s soft or hard total instead.
A pair of 5s is a useful hard 10, not an invitation to create two hands starting with 5. Likewise, a pair of 9s against a dealer 7 is a stand under these rules. Splitting is an option, not an obligation.
3. Soft-Hand Strategy
A soft hand has an ace that can count as 11 without busting. Ace-6 is soft 17. If a later card forces the ace to count as 1, the hand becomes hard.
| Your hand | Play against the dealer’s upcard |
|---|---|
| Soft 13 or 14: A-2 or A-3 | Double against 5 and 6. Otherwise, hit. |
| Soft 15 or 16: A-4 or A-5 | Double against 4–6. Otherwise, hit. |
| Soft 17: A-6 | Double against 3–6. Otherwise, hit. |
| Soft 18: A-7 | Double against 3–6. Stand against 2, 7, and 8. Hit against 9, 10, and ace. |
| Soft 19, 20, or 21 | Stand against every upcard. |
If a recommended double is unavailable, hit soft 13 through soft 17. With soft 18, stand where this chart recommends doubling.
This fallback matters with soft hands containing more than two cards when doubling is restricted to the initial two. After drawing, reassess your current hand rather than following the instruction for your original cards.
Soft 18 against a dealer 10 is a good example of why I prefer a chart to a slogan. “Never hit 18” sounds reassuring, but it gives the wrong answer here.
4. Hard-Hand Strategy
A hard hand has no ace counted as 11. A hand can contain an ace and still be hard: ace-6-10 is hard 17.
| Your hard total | Play against the dealer’s upcard |
|---|---|
| 8 or less | Hit against every upcard. |
| 9 | Double against 3–6. Otherwise, hit. |
| 10 | Double against 2–9. Hit against 10 or ace. |
| 11 | Double against 2–10. Hit against ace. |
| 12 | Stand against 4–6. Otherwise, hit. |
| 13 through 16 | Stand against 2–6. Hit against 7 through ace, unless the earlier surrender instruction applies. |
| 17 through 21 | Stand against every upcard. |
If a recommended hard-hand double is unavailable, hit. Pair strategy takes priority when splitting is available: two 8s are not simply an ordinary hard 16.
How Rule Changes Affect Blackjack Strategy
H17: When the Dealer Hits Soft 17
H17 is less favorable to the player than an otherwise equivalent S17 game. For the same four- to eight-deck rules used above, changing only S17 to H17 produces these notable adjustments:
- Hard 11 against an ace: Double if permitted; otherwise, hit.
- Soft 18 against a 2: Double if permitted; otherwise, stand.
- Soft 19 against a 6: Double if permitted; otherwise, stand.
Late-surrender recommendations also change. If your table offers H17 and surrender, use a chart for that combination rather than assuming the S17 surrender list is complete.
No DAS: When You Cannot Double After Splitting
Some splits are attractive partly because the new hands can produce favorable doubling opportunities. Remove that permission, and the value of the split changes.
For the corresponding common multi-deck game without DAS, hit a pair of 4s against a dealer 5 or 6 rather than splitting. Some small-pair decisions change, too. This is why I would learn the rule label alongside the recommendation.
When Dealer Blackjack Can Take Additional Wagers
In some no-hole-card games, the dealer receives the second card after players act. Depending on the rules, a later dealer blackjack can take double and split wagers as well as the original bet.
That additional exposure can change decisions against an ace or ten-value upcard. Other games protect some or all additional wagers.
Ask which wagers are lost to dealer blackjack. “No hole card” describes a dealing procedure, but it does not by itself provide everything needed to select the correct strategy.
Different Deck Counts and Doubling Permissions
Do not automatically reuse this multi-deck chart for single-deck or double-deck blackjack. Deck count can change borderline decisions.
Hand composition can matter, too. In Wizard of Odds’ freshly shuffled single-deck H17 guide, a three-card 16 made of 10-4-2 stands against a dealer 10, while 6-6-4 hits against that same upcard. The totals match, but the cards removed from the deck differ. These are specialized examples, not changes to the multi-deck chart above.
Restrictions such as doubling only on 10 or 11 affect your available actions and the value of some splits. Games with altered decks, bonus rules, or unusual payouts need their own strategy.
Gamboool’s Rule and Payout Comparisons
We assembled these comparisons from the supplied strategy guidance and published casino handbook examples. This is a compilation of public material, not a casino test or a survey of current tables.
The MGM Grand Detroit gaming handbook describes standard blackjack, 6:5 blackjack, and Spanish 21 separately. Its rules are illustrative and subject to change, so these examples do not confirm today’s table availability or live rules.
Gamboool original analysis
We assembled the comparison below from published information and our calculations. These are selected examples, rather than measured gambling sessions or a representative survey.
| Subject | Detail | Published information |
|---|---|---|
| BlackjackInfo strategy engine | Rule-dependent chart selection | The engine supports changes to surrender, doubling restrictions, hole-card procedures, and deck count rather than treating one chart as universal. Source |
| BlackjackInfo basic strategy guidance | Hard 11 against a dealer ace: S17 versus H17 | The published guidance excludes an ace from the usual hard-11 doubling recommendation but includes it under H17. Source |
| BlackjackInfo basic strategy guidance | Soft 19 against a dealer 6 under H17 | The source identifies doubling soft 19 against 6 as an H17-specific recommendation. Source |
| BlackjackInfo basic strategy guidance | Pair of 4s: DAS versus no DAS | Against a dealer 5 or 6, the source recommends splitting 4s when doubling afterward is permitted and hitting otherwise. Source |
| MGM Grand Detroit published gaming handbook | Standard natural-blackjack payout | The standard Blackjack section describes a profit payout of one and one-half times the bet, contrasting with the handbook’s separate 6:5 game. Source |
| MGM Grand Detroit published gaming handbook | 6:5 natural-blackjack payout | The separate 6 to 5 Blackjack section describes a six-to-five profit payout for an initial ace and ten-value card. Source |
| MGM Grand Detroit published gaming handbook | Dealer soft-17 procedure | The handbook explicitly makes hitting soft 17 depend on the table designation. Source |
| MGM Grand Detroit published gaming handbook | Standard blackjack split limits and DAS | The Blackjack Terms section permits up to four hands and doubling after splitting but limits split aces to one hit. Source |
| MGM Grand Detroit published Spanish 21 rules | Split-ace permissions compared with standard blackjack | Unlike the handbook’s standard blackjack restriction on split aces, its Spanish 21 section permits hitting and doubling split aces. Source |
| MGM Grand Detroit published Spanish 21 rules | Doubling permissions compared with standard blackjack | The Spanish 21 section permits doubling with two or more cards, whereas the standard Blackjack Terms section describes doubling on the first two cards. Source |
| MGM Grand Detroit published Spanish 21 rules | Altered deck composition | The handbook describes six decks without numeral 10 cards, illustrating why an ordinary blackjack chart should not automatically be applied to Spanish 21. Source |
| MGM Grand Detroit published gaming handbook | Standard blackjack when both sides have naturals | The standard Blackjack section treats simultaneous player and dealer blackjacks as a tie. Source |
| MGM Grand Detroit published Spanish 21 rules | Player natural compared with standard blackjack | The Spanish 21 section gives player blackjack priority over dealer blackjack, contrasting with the standard game’s tie rule. Source |
| MGM Grand Detroit published gaming handbook | Insurance stake limit and payout | Insurance is described as a separate bet on the dealer’s hidden ten-value card, capped at half the original wager and paying 2:1 when successful. Source |
| MGM Grand Detroit published gaming handbook | Scope of the published rule comparisons | These are handbook examples, not confirmation of current table availability or unchanged live rules; the publisher explicitly qualifies them. Source |
| BlackjackInfo basic strategy guidance | Long-term limitation | The source distinguishes basic strategy from obtaining a long-term player edge, supporting guidance that better decisions do not promise profits. Source |
| Calculation | Result | Basis |
|---|---|---|
| Net profit on one eligible natural blackjack at a 3:2 payout with an illustrative $10 stake; excludes returned stake and assumes no dealer blackjack | 15 USD net profit | Illustrative original wager in USD = 10 (assumption); Published standard blackjack profit multiplier = 1.5 (illustrative/estimate) |
| Net profit on one eligible natural blackjack at a 6:5 payout with the same illustrative $10 stake; excludes returned stake and assumes no dealer blackjack | 12 USD net profit | Illustrative original wager in USD = 10 (assumption); Published six-to-five blackjack profit multiplier, expressed as a decimal = 1.2 (illustrative/estimate) |
| Net profit on one eligible natural blackjack at a 3:2 payout with an illustrative $25 stake; excludes returned stake and assumes no dealer blackjack | 37.5 USD net profit | Illustrative original wager in USD = 25 (assumption); Published standard blackjack profit multiplier = 1.5 (illustrative/estimate) |
| Net profit on one eligible natural blackjack at a 6:5 payout with the same illustrative $25 stake; excludes returned stake and assumes no dealer blackjack | 30 USD net profit | Illustrative original wager in USD = 25 (assumption); Published six-to-five blackjack profit multiplier, expressed as a decimal = 1.2 (illustrative/estimate) |
| Total wager exposed after doubling an illustrative $25 hand, compared with leaving the original wager unchanged | 50 USD total wager exposed | Illustrative original wager in USD = 25 (assumption); Total wager multiplier after doubling = 2 (illustrative/estimate) |
| Total wagers exposed when an illustrative $25 original hand is split to four hands, with no doubles or side bets | 100 USD total wagers exposed | Illustrative equal wager per split hand in USD = 25 (assumption); Published maximum number of split hands = 4 (illustrative/estimate) |
| Maximum additional insurance wager on an illustrative $25 original wager; separate from the main hand | 12.5 USD additional insurance wager | Illustrative original wager in USD = 25 (assumption); Published maximum insurance fraction of the original wager = 0.5 (illustrative/estimate) |
| Net profit on a winning illustrative $10 insurance wager; excludes returned insurance stake and any main-hand outcome | 20 USD insurance net profit | Illustrative insurance wager in USD, assuming an original wager large enough to permit it = 10 (assumption); Published insurance profit multiplier = 2 (illustrative/estimate) |
Method: Selected published inputs, collected 2026-10-10. Calculations use product. Assumptions are stated in the calculation labels; results are not predictions of a particular session.
3:2 vs. 6:5 Blackjack Payouts
Using an illustrative $10 wager, an eligible natural blackjack pays $15 profit at 3:2, versus $12 profit at 6:5. With an illustrative $25 wager, those profits are $37.50 and $30, respectively. In each example, the original stake is returned separately, and the dealer does not also have blackjack.
These are conditional payout calculations using assumed stakes, not estimates of session earnings or the game’s complete house edge.
I would look for an affordable 3:2 game before accepting 6:5. But “affordable” matters: a better payout is not a reason to move to a minimum bet outside your spending limit.
Rule Differences That Change the Game
| Comparison | Practical consequence |
|---|---|
| Dealer stands versus hits soft 17 | Under the multi-deck rules covered here, hard 11 against an ace changes from hit under S17 to double under H17, when doubling is permitted. |
| DAS versus no DAS | A pair of 4s against a dealer 5 or 6 changes from split with DAS to hit in the corresponding common multi-deck game without DAS. |
| Standard blackjack versus Spanish 21 deck | The handbook’s Spanish 21 game removes numeral 10 cards but keeps face cards. An ordinary blackjack chart should not be carried over automatically. |
| Standard blackjack versus Spanish 21 split aces | The handbook’s standard game limits split aces to one additional card, while its Spanish 21 section permits hitting and doubling split aces. |
| Standard blackjack versus Spanish 21 doubling | The standard section describes doubling on the first two cards. The Spanish 21 section permits doubling with two or more cards, including after splitting. |
| Simultaneous player and dealer blackjacks | The handbook’s standard game treats them as a tie. Its Spanish 21 rules give the player’s blackjack priority. |
One favorable-looking feature does not settle which game is best. Spanish 21 combines different permissions, payouts, and deck composition. You need a strategy for the whole game, not an ordinary blackjack chart with convenient exceptions added.
How to Use a Blackjack Strategy Chart During a Hand
I would learn the decision order before trying to memorize every entry:
- Check surrender. On an eligible initial hand, use the recommendation for the table’s surrender rule.
- Check pairs. If you have a pair, determine whether splitting is recommended and permitted.
- Check for a soft hand. If an ace counts as 11, use the soft-hand chart.
- Otherwise, use the hard total. Compare your total with the dealer’s upcard.
- Reassess after each card. Your total, hand type, and available actions may have changed.
Under the S17 chart above, hard 12 against a dealer 3 is a hit, soft 18 against a dealer 10 is a hit, and a pair of 9s against a dealer 7 is a stand. These are hypothetical chart examples, not reports of gambling sessions or predictions of winning hands.
My preferred way to practice is to work through decisions without money at stake, paying particular attention to hands that feel counterintuitive. If the chart disagrees with your instinct, that is the entry worth learning.
Should You Take Insurance or Even Money?
For ordinary basic strategy without information about the remaining cards, decline insurance. Insurance is a separate wager offered when the dealer shows an ace. It bets that the dealer’s hidden card is worth 10, giving the dealer blackjack.
The handbook example allows insurance up to half the original wager and pays a winning insurance bet at 2:1. Using an illustrative $25 main wager, the maximum additional insurance stake is $12.50. A separate illustrative $10 insurance wager, assuming the main wager is large enough to permit it, pays $20 profit if it wins. That calculation excludes the returned insurance stake and any outcome on the main hand.
The payout is not evidence that insurance is good value. Your main hand being strong does not make the dealer’s hidden card more likely to be worth 10.
At a standard 3:2 table, taking even money on your blackjack against a dealer ace is economically equivalent to taking insurance. Ordinary basic strategy declines it, too. Do not assume a differently worded offer at a 6:5 table works the same way.
Splits and Doubles Increase Your Total Wager
This is the practical bankroll point I would put beside any strategy chart: your opening bet is not always your total exposure. Splitting and doubling require additional money.
With an illustrative $25 opening wager, doubling puts $50 in total wagers on that hand. If the rules allow you to split to four hands, four equal $25 wagers put $100 in total wagers into that round, before any doubles or side bets.
These figures use assumed stakes and the handbook’s described permissions. They are arithmetic examples, not observed player spending or predicted losses. Your table’s split limits may differ.
Some variants change who funds the additional wager. Galaxy Gaming’s Ride Free description, for example, permits free doubles on two-card totals of 9, 10, or 11. That is a specific game permission, not a feature of ordinary blackjack or a reason to assume every recommended double requires no additional cash.
Choose an opening stake that leaves room for additional wagers without exceeding what you can afford to lose. If the minimum bet makes that uncomfortable, my advice is to find a cheaper game or skip the table.
Betting Systems Are Not Basic Strategy
Basic strategy tells you how to play a hand. A betting system tells you how much to wager. Those are different questions.
Doubling your stake after a loss, increasing it after a win, or following a preset sequence does not change the underlying game’s expected value. A losing run can continue until a progression exceeds your available money or reaches the table limit.
Set spending and time limits before playing, use money you can afford to lose, and do not increase bets to recover losses. A stop-loss limit can help control spending. It cannot make a negative-expectation game profitable.
I would rather see a player use modest wagers and a correct chart than an elaborate progression built around the belief that a win is due.
Card Counting and Side Bets
Card counting uses information about previously dealt cards to estimate the composition of the remaining shoe. Under suitable conditions, that information can affect betting and playing decisions. It is separate from ordinary basic strategy and requires more than memorizing these tables.
Continuous shuffling, frequent reshuffles, limited deck penetration, and restrictive rules can reduce or remove useful opportunities. Casinos may also restrict play or ask a player to leave, subject to local law and house policy. Counting does not guarantee a profit.
Side bets have their own probabilities and payout tables. Playing the main hand correctly does not make an optional wager good value. I would evaluate each side bet separately rather than letting a large advertised payout do the persuading.
Blackjack Strategy FAQ
Can Basic Strategy Guarantee a Win?
No. It improves decisions under specified rules, but it cannot guarantee a winning hand, session, or long-term result.
Should You Always Assume the Dealer Has a 10?
No. That shortcut ignores other possible hole cards and can lead to incorrect decisions. Basic strategy considers possible outcomes rather than pretending one particular card is there.
Should You Always Split Aces and 8s?
That is a useful starting rule for the game covered by this chart, not a universal rule for every blackjack variant. Different surrender provisions and exposure to a later dealer blackjack can create exceptions.
Does Another Player’s Bad Decision Ruin Your Strategy?
Another player’s action changes which cards are dealt next, but you cannot know in advance whether that change will help or hurt you. It is not a dependable reason to expect worse results. My advice is to concentrate on your own hand rather than police someone else’s.
Can You Use a Strategy Card at the Table?
Many casinos permit a printed basic strategy card, but policies vary. Ask first, and do not assume phone use during play is allowed. Keep the correct chart handy, and use it without unnecessarily slowing the game.
The Bottom Line
The best starting blackjack strategy is a basic strategy chart that matches the game in front of you. Check the payout, deck count, soft-17 rule, doubling permissions, surrender options, and dealer blackjack procedure.
Then use the chart consistently, allow for the additional cost of splits and doubles, and keep wagers within an affordable limit. My view is simple: choose better rules when you can, make better decisions when you play, and never confuse either with a promise of winning.