Blackjack Strategies: How to Exploit Your Advantage

The house has a 0.5% edge in blackjack. This edge always remains 0.5% even with the best blackjack betting strategies. It can’t go lower, because basic strategy is the mathematically optimal decision for every hand. It climbs higher if you play without a strategy.

However, this is one of the very few casino games where your decisions and observations can move the outcome in your favour (or protect your bankroll at the very least). Using a betting system can reduce your risk profile, while card counting gives you an upper hand with each bet.

So, what are the best blackjack winning tips that you can use to improve your chances in this game? In this guide, we will walk you through:

• Basic strategy and the hands worth memorising
• Whether betting systems like Martingale work
• Common mistakes that can drain your bankroll
• Card counting
• Tips on managing bankroll

Basic Blackjack Strategies

Martingale

The rule is simple in Martingale: double your bet after every loss, and drop back to your starting stake as soon as you win. So, should you use it? If your bankroll is under £100, do not attempt this system. It is an aggressive bet that eats bankroll fast. For example, a £1 start becomes a £32 bet after just five losses in a row. And, there’s no guarantee you’ll win after five losses.

1-3-2-6 System

This system is originally designed for roulette. It is built for winning streaks rather than recovery. You pick a unit size, then bet 1, 3, 2 and 6 units across four consecutive wins. So, if you win on a £5 bet, the next bets will be £15, £10, £30. If you lose, start with £5 again.

The appeal is that a full run returns a solid profit while a bad start costs you one unit. However, the problem is that blackjack has doubles, splits, and pushes, which directly impact your winning streak. For example, if you are splitting your cards on the fourth bet, do you increase the bet to 12, and risk the loss? Think about EV (expected value) of a hand before using this system.

d’Alembert

This system is named after a French mathematician, and is a gentler version of Martingale. Instead of doubling, you raise your bet by one unit at a time. If you lose, lower your bet by a unit.

As with any system, make sure to decide in advance what win or loss figure makes you leave the game. This system becomes expensive if you chase losses.

What Is the Best Blackjack Betting Strategy?

A basic blackjack betting strategy is the best approach, as long as you play it consistently, and back it with disciplined bankroll management.

That may be an unsatisfying answer if you were hoping for a betting pattern, but that’s what the math says.

Basic strategy (based on whether to hit or stand depending on your cards) is based on a mathematical computation for every possible combination of your hand against the dealer’s upcard. This is generated by simulating billions of hands. Playing it correctly keeps the house edge at 0.5%. But if you play on instinct instead, you’re up against a 2% house edge. So, if you had £100 in action, the difference would be an expected £0.50 loss and an expected £2 loss.

Betting systems do not change the house edge. This is the part people get confused about. Martingale, Fibonacci, and d’Alembert help you manage your bankroll, but they don’t change the odds of the hand you’re dealt. The house edge is not impacted by your stake size.

Since the 0.5% edge can’t be eliminated, your best bet is to keep your bet sizing low, and follow the blackjack betting strategy chart below.

Basic Blackjack Strategy Chart

These charts tell you when to hit, stand, split, or double based on your hand vs the dealer upcard. For a deeper understanding of these terms, read the blackjack game rules first.

Hard Hands

Soft Hands Basic Blackjack Strategy Chart

Pairs

Hard Hands vs Soft Hands

The strategy chart is different for hard and soft hands because soft hands are flexible. A hard hand either contains no ace, or contains an ace that must count as 1 because counting it as 11 would bust you. For example, 10, 6 is a hard hard and A,6 is a soft hand because you have the flexibility with the ace. A + 6 is soft 17. If you draw a 10, you can read it as a hard 17 as the ace drops to 1.

Card Counting

This requires tracking the ratio of high cards to low cards left in the shoe. The Hi-Lo system assigns +1 to cards 2–6, 0 to 7–9, and −1 to tens and aces. Players have to keep a running count, then divide by the estimated decks remaining to get a “true count.”

If the shoe is rich in tens and aces, it favours you, and that’s when you can start betting high. There is a significant caveat though. Card counting takes real practice. You need to keep an accurate count matching the table speed. All this while playing the correct strategy. Moreover, the edge is thin, so you’ll need a large bankroll to survive variance. 

You should also note that physical casinos don’t like this strategy and may shuffle you out. And online, this barely works as RNG blackjack tables reshuffle every hand.

Common Blackjack Mistakes

• Taking insurance. This has a 7% house edge. A non-counter should never take an insurance bet.
• Splitting tens. Twenty is already a winning hand. Splitting it can be costly.
• Ignoring the dealer’s upcard. Say you have a 13. What you do next should depend on the dealer’s card. Stand if they have a 4 and hit if they have a 9. If you are just looking at your hand, you are not applying the strategy correctly.
• Chasing losses. This mistake can convert one loss into a bad session for your entire bankroll.
• Sitting at 6:5 tables. House edge in this version is 1.4%.
• Deviating from the strategy chart. Following the blackjack betting strategy chart pays off through consistency. Don’t ever play this game by “feel”.

Blackjack Strategies That Do Not Work

Some of the most confidently repeated blackjack advice is quite wrong. These are some of the most common blackjack strategies that do not work:

“Martingale guarantees a profit.”

This can work only with an infinite bankroll and no table limit. In reality, you’ll achieve several small wins along with an occasional devastating loss. Betting a flat amount will give you the same expected loss, but with far less dramatic swings.

“Insurance protects your hand.”

Insurance is a separate side bet on whether the dealer has blackjack. It pays 2:1 but carries a house edge of around 7%, one of the worst on the table. Even the “even money” on your own blackjack is a bad bet.

“Increase your stake after every loss.”

This follows a flawed logic that a win is “due” after several losses. Cards are randomly shuffled so your odds after five losses are identical to the odds you had on the first hand. Raising stakes into a losing run only exposes your bankroll to risk.

“Chase it back.”

Downswings happen in every game. But if you start chasing your losses, chances are you’ll become reckless and abandon your strategy. Revenge betting is an expensive habit in the game.

“Play by feel.”

Intuition may tell you to stand on 16 if the dealer has a 10. But the math says hit. Never play by gut and trust the chart.

Is There a Power Blackjack Strategy?

There is no secret “power” system that beats standard blackjack, whether you play at a land-based venue or an online casino. There’s no universally recognised strategy by that name. Any site that promises one might be selling you a repackaged progression system.

But there does exist a game called “Power Blackjack”. It’s a live dealer game launched by Evolution in 2020. It uses eight decks with 9s and 10s removed from each. This means there are 64 fewer cards in the shoe (picture cards remain). You can double, triple or quadruple down on any first two cards, even after a split. There are four optional side bets in this game: Any Pair, 21+3, Hot 3 and Bust It, with no Six Card Charlie rule.

Because of that stripped shoe, the standard blackjack betting strategy chart no longer applies to this game. There’s a separate chart for this game and that’s the one to use. 

So, is it the right game for you? In this version, you can triple and quadruple down. If you choose to split, a quadrupled split hand puts eight units in play. That’s a lot of variance, so beginners should avoid this game.

Blackjack Winning Tips: Bankroll Management

• Set a budget before you play. Decide your betting budget before the first hand and don’t top it up mid-session. Make sure to treat it as the cost of entertainment. Don’t budget more than you can afford.
• Size your bets against your bankroll. For example, 1-2% per hand. With £100 bankroll, that would be £1–£2 stakes per game. The point is to keep your game slow and stretched out. If you bet £20, your bankroll will be finished with five losses.
• Set win and loss limits. This takes emotions out of the game. A win limit will stop you from handing back a good result to variance.
• Never chase. Leave the table when you hit your loss limit. The cards produce random results and don’t “owe” a win. Chasing losses will drain your bankroll instantly.
• Keep it in proportion. Betting should never be seen as a way to make quick cash. Treat it only as a form of entertainment. If it stops feeling that way, use deposit limits, time-outs or self-exclusion tools. Free, confidential support is available through BeGambleAware and GamCare.

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