The house edge on mobile blackjack is typically well under 1% for a standard game that pays 3 to 2 on blackjack, played with basic strategy: Wizard of Odds puts a six-deck European no-hole-card game at 0.62%. Rules such as 6 to 5 payouts, plus side bets and fee-based variants, can push it far higher, so read each game's rules.
A six-deck European no-hole-card game has a 0.62% house edge with basic strategy.
A 6 to 5 blackjack payout adds about 1.39% to the house edge on its own.
Side bets often carry edges of 3% to 8% or more, many times the main game.
RNG and live blackjack share the same maths; the rules on the table decide the edge.
At £5 a hand, 100 hands at 0.62% cost about £3.10 on average.
European rules (6 decks)
0.62% house edge
Infinite Blackjack (Evolution)
0.45%
Free Bet Blackjack
1.04%
Cost of 6 to 5 payout
About +1.39%
Insurance (8 decks)
About 7.47%
UK minimum game cycle
5 seconds (from 17 January 2025)
What is the house edge on mobile blackjack?
The house edge is the average share of each bet the casino keeps over the long run. In blackjack it isn't one fixed number, because it depends on the table rules and on how well you play. The figures people quote assume you follow basic strategy, the mathematically best play for every hand.
On standard rules that pay 3 to 2 on blackjack, the edge is usually a fraction of a percent. The maths site Wizard of Odds analyses a European blackjack game (opens in a new tab) with six decks, no dealer peek, the dealer standing on soft 17, doubling on 9 to 11 only and doubling after splitting allowed, and gets 0.62%. Under liberal Las Vegas rules it quotes 0.28%, but that's a US rule set, not a guide to UK apps.
Playing on a phone doesn't change the maths. A blackjack app uses the same rules and card odds as the desktop version of the same game. For more answers on how casino games work in apps, see our casino app questions hub.
Blackjack house edge by rule: what each change costs
Each rule's effect is measured against a baseline of eight decks, the dealer standing on soft 17, with doubling and splitting allowed. The figures below come from Wizard of Odds' rule variations table (opens in a new tab), shown from your side of the table. They're approximations that add up roughly, so use them to compare tables, not to calculate an exact figure.
How common blackjack rules change the house edge
Rule
Effect on the house edge
Blackjack pays 6 to 5 instead of 3 to 2
Adds 1.39%
Blackjack pays 7 to 5
Adds 0.45%
Blackjack pays even money (1 to 1)
Adds 2.27%
Dealer hits soft 17
Adds 0.22%
Doubling on 10 and 11 only
Adds 0.18%
No doubling after splitting
Adds 0.14%
European no-hole-card rule
Adds 0.11%
No re-splitting
Adds 0.10%
Late surrender (against a ten)
Cuts 0.07%
Six-card Charlie
Cuts 0.16%
Single deck instead of eight
Cuts 0.48%
The payout on a blackjack matters most. At 3 to 2, a £10 blackjack wins £15; at 6 to 5, it wins £12. One single-deck game analysed by Wizard of Odds rises from a 0.05% edge to 1.44% when the payout drops to 6 to 5. If the help screen shows a 6 to 5 payout, look for another table.
House edge of blackjack variants on casino apps
Branded variants change the rules to add features, and the edge moves with them. These figures come from Wizard of Odds, except where a developer's own claim is noted.
Blackjack variants and their house edge
Variant
Key rules
House edge
European blackjack
6 decks, no peek, dealer stands soft 17, double 9–11
0.62%
Atlantic City rules
As listed by Wizard of Odds
0.43%
Infinite Blackjack (Evolution)
8 decks, dealer stands soft 17, six-card Charlie
0.45%
Unlimited Blackjack (Ezugi)
8 decks, dealer stands soft 17, no surrender
0.42% (help files claim 99.56% return)
Blackjack Switch
Swap second cards; blackjack pays even money; dealer 22 pushes
0.58% (6-deck Vegas rules)
Spanish 21
Tens removed; bonus payouts
0.40% to 0.76%
Free Bet Blackjack
Free doubles and splits; dealer 22 pushes
1.04%
Lightning Blackjack (Evolution)
Fee on each bet; random multipliers
0.44% claimed by Evolution with optimal play
Lightning Blackjack needs a warning. Evolution's 0.44% assumes an optimal strategy it doesn't publish. By Wizard of Odds' estimate, a player using conventional basic strategy loses about 17.63% of the original bet per hand, or 8.82% when the fee is counted in the total wagered. Read more in our pages on Lightning Blackjack, Free Bet Blackjack and Infinite Blackjack.
Mobile blackjack house edge in pounds
Expected loss is total staked multiplied by the house edge. The table assumes 100 hands, which is a guide; the actual cost depends on how many hands you play and how often you double or split.
Expected loss over 100 hands
Bet
Stake per hand
Total staked
House edge
Expected loss
Infinite Blackjack main bet
£5
£500
0.45%
£2.25
European rules main bet
£5
£500
0.62%
£3.10
Free Bet Blackjack main bet
£5
£500
1.04%
£5.20
European rules with a 6 to 5 payout (approx.)
£5
£500
About 2.01%
About £10.05
21+3 side bet (Evolution 100/40/30/10/5 paytable, 8 decks)
£1
£100
3.70%
£3.70
Perfect Pairs side bet (25/12/6, 8 decks)
£1
£100
4.10%
£4.10
Notice that a £1 side bet can cost more than a £5 main bet over the same hands. Short sessions also vary a lot: the expected loss is an average, and a run of 100 hands can finish well ahead or well behind it. Losses are still the likely outcome over time.
Blackjack side bets: where the house edge jumps
Most live and many RNG blackjack games offer side bets. Their edges depend on the paytable and the number of decks, so the same name can carry very different costs.
21+3 (your two cards plus the dealer's up card as a poker hand): 3.70% with eight decks on one Evolution paytable, and 6.29% to 8.78% on a less generous version, per Wizard of Odds' 21+3 analysis (opens in a new tab).
Perfect Pairs: 2.17% to 7.95% with eight decks, and 4.18% to 9.97% with six, depending on the paytable.
Bust It / Buster: 6.18% on the Evolution paytable Wizard of Odds analyses, with eight decks.
Lucky Ladies: 5.87% to 24.71% with six decks.
Insurance: about 7.47% from a full eight-deck shoe; basic strategy says never take it, including "even money".
How basic strategy lowers the house edge on a phone
Every figure on this page assumes basic strategy. Playing by hunch, such as standing on every 12 or always taking insurance, raises the edge you actually face. Basic strategy reduces the house edge; it doesn't remove it.
For four to eight decks with the dealer standing on soft 17, Wizard of Odds' chart includes these principles: always split aces and 8s, never split 5s or 10s, always stand on hard 17 or more, and never take insurance. European no-peek games need a slightly different chart, because doubled and split bets are lost to a dealer blackjack. Our page on blackjack strategy on mobile explains how to use a chart.
RNG vs live blackjack on mobile: does the edge change?
Not in itself. An RNG game and a live blackjack table with the same rules have the same edge. What differs is the deck handling. Most online RNG blackjack shuffles after every hand, says Wizard of Odds, and that trims the edge very slightly: by 0.02% in a six-deck game, according to its online blackjack answers (opens in a new tab).
Card counting is sometimes raised here, but only as history. It was popularised by Edward Thorp's 1962 book and relies on tracking cards through a shoe. Online RNG blackjack reshuffles every hand, and live tables generally use shuffling methods that defeat it, so it isn't a practical factor in apps. Casinos can also refuse service to suspected counters.
How to check a blackjack game's rules and edge in your app
Open the blackjack game in your casino app, but don't bet yet.
Open its help or rules screen.
Find the blackjack payout: 3 to 2 is standard, 6 to 5 costs about 1.39% more.
Check the number of decks and whether the dealer hits or stands on soft 17.
Look for the RTP or house edge line, which should be calculated using a standard strategy.
Check the separate RTP of any side bet before you place one.
If anything is unclear, ask support before you play.
Since 17 January 2025, casino games other than slots must allow at least 5 seconds per game cycle. See our page on game speed rules.
Autoplay is banned for all online casino games from the same date, and you can't play several casino games at once.
Your net spend and time spent must be shown in real time during play.
The £5 and £2 online stake limits apply to slots only, not to blackjack.
Age and identity must be verified before you can deposit or play, including free-to-play demos.
None of these rules change the house edge, but the 5-second minimum and the ban on multi-game play put a ceiling on how fast losses can build. If you play multi-hand blackjack, remember that each hand is a separate stake.
Blackjack in partner apps and how the offers fit
The App Store listings for the Coral Casino app and the Ladbrokes Casino app mention blackjack alongside roulette and live casino, and PlayOJO's mentions table games and live casino. Which blackjack variants each lobby carries isn't published, so check the game rules in the app. Our best blackjack apps list compares them.
Be clear on the offers below: they're slot offers, and blackjack isn't part of them. 18+, terms apply.
Coral Casino: new players aged 18+ who deposit (some methods excluded) and bet £10 or more on slots get 100 free spins on selected games at 10p each, to be accepted within 48 hours and used within 7 days, with no wagering on winnings. Deposits made with Neteller, PayPal, Paysafe, Skrill, prepaid cards or certain debit cards won't count. The promotion runs from 1 October 2026 until 1 February 2027.
Ladbrokes Casino: new customers aged 18+ who deposit and spend £10 or more on slots get 50 free spins a day for 10 days (500 maximum) at 10p each on selected games, claimed before 23:59 daily and valid for 7 days, with no wagering. Deposits via prepaid card, PayPal, Paysafe, Neteller, Skrill or Moneybookers won't qualify.
PlayOJO: new UK customers aged 18+ (not Northern Ireland) who make a first deposit of £10 or more get 80 free spins on Big Bass Bonanza at 10p each, with no wagering and winnings paid in cash. Available only through the designated offer link; can't be combined with other offers.
Coral and Ladbrokes are both run by LC International Limited (Entain), so one person may not be able to open new accounts with both.
These welcome offers are slot spins, not blackjack bonuses. Table and live games are typically excluded or contribute less, so check the terms. 18+.
Coral and Ladbrokes are both run by LC International Limited (Entain). If you already hold an account with one Entain brand, you may not be able to open another; check the terms first.
Significant terms: 18+. New players only. Offer runs 01/10/2026 to 01/02/2027. Deposit (certain types excluded) and bet £10+ on slot games to get 100 free spins (selected games, £0.10 each, 48 hrs to accept, valid 7 days). No wagering on free spin winnings. Deposits by Neteller, PayPal, Paysafe, Skrill, prepaid cards and certain debit cards do not qualify. Restrictions and T&Cs apply. GamCare.org.uk
Read our Coral app reviewLicence: LC International Limited, Gambling Commission account 54743. Offer checked 5 October 2026.
Time limitClaim daily for 10 days; each batch valid 7 days
Worked valueUp to 500 spins at £0.10 (up to £50 in spins)
Significant terms: 18+. New customers only, from 14/11/25 until further notice. Certain deposit methods excluded. Deposit and spend £10+ on slots for 50 free spins a day during the first 10 days after first deposit and registration (max 500, £0.10 each, selected games, claim before 23:59 each day, valid 7 days). No wagering. Prepaid cards, PayPal, Paysafe, Neteller, Skrill and Moneybookers deposits do not qualify. Restrictions and T&Cs apply. GamCare.org.uk
Read our Ladbrokes app reviewLicence: LC International Limited, Gambling Commission account 54743. Offer checked 5 October 2026.
Significant terms: 18+. New UK customers (excluding Northern Ireland). First deposit only. Minimum deposit £10. 80 free spins on Big Bass Bonanza, £0.10 each. No wagering requirements; winnings paid in cash. Cannot be used with any other offer. Only available to players who arrive through the designated offer link. Full T&Cs apply. GamCare.org.uk
Read our PlayOJO app reviewLicence: Skill On Net Limited, Gambling Commission account 39326. Offer checked 5 October 2026.
18+. Every casino game has a built-in house edge, so over time you should expect to lose what you stake. Set a budget before you play and stop when it’s gone: safer gambling tools and support. Free, confidential help: National Gambling Helpline 0808 8020 133.
Frequently asked questions
What is the house edge on online blackjack in the UK?
It depends on the game's rules, but standard games paying 3 to 2 on blackjack typically sit well under 1% with basic strategy. A six-deck European no-hole-card game is 0.62%, and Evolution's Infinite Blackjack is 0.45%, according to Wizard of Odds. Variants with free doubles, fees or 6 to 5 payouts cost more. Check each game's help screen for its rules and RTP. Our blackjack app guide explains the rules.
Is the house edge higher on mobile blackjack?
No. The same game has the same rules and maths whether you play it in an app, a mobile browser or on a computer. What changes the edge is the rule set, such as the blackjack payout and the number of decks, and how closely you follow basic strategy. Different games in the same app can have different edges, so compare them. See are app games the same as desktop.
Does live blackjack have a lower house edge than RNG?
Not because it's live. A live table and an RNG game with identical rules have the same edge. RNG games usually shuffle after every hand, which Wizard of Odds says trims the edge very slightly, by 0.02% in a six-deck game. Live tables vary more in rules and side bets, so read the help panel in the stream. Our page on live blackjack on mobile covers the format.
How much does a 6 to 5 blackjack payout cost?
About 1.39% of every bet, according to Wizard of Odds' rule variations table. In pounds, a £10 blackjack wins £15 at 3 to 2 but only £12 at 6 to 5. Over 100 hands at £5, that extra 1.39% adds roughly £6.95 to the expected loss. If a game's rules show a 6 to 5 payout, choosing a 3 to 2 table is the simplest saving. Our blackjack strategy on mobile page has more.
Should I take insurance in blackjack?
Basic strategy says no. Insurance pays 2 to 1 if the dealer has blackjack, but from a full eight-deck shoe it carries a house edge of about 7.47%, many times the main game. Taking 'even money' on your own blackjack is the same bet in another form. Skipping insurance is one of the easiest ways to keep the house edge low. See our side bet glossary entry for related bets.
Do blackjack side bets have a high house edge?
Usually, yes. One Evolution 21+3 paytable has a 3.70% edge with eight decks, Perfect Pairs at 2.17% to 7.95% with eight decks, and Lucky Ladies as high as 24.71% on some paytables. The exact figure depends on the paytable and deck count, so check the game's help screen. A £1 side bet can cost more over time than a £5 main bet. Our house edge by game page compares games.
Can card counting beat mobile blackjack?
No. Card counting is a historical technique that relies on tracking cards through a shoe. Online RNG blackjack reshuffles every hand, and live tables generally use shuffling methods that defeat it, so it doesn't work in apps. Casinos can also refuse service to anyone they suspect of counting. Basic strategy lowers the house edge, but nothing removes it. Our blackjack app guide covers the rules that do matter.
Which blackjack game has the lowest house edge in apps?
Among the games Wizard of Odds analyses, standard eight-deck games like Infinite Blackjack (0.45%) and Unlimited Blackjack (0.42%) sit at the low end, with the six-deck European game at 0.62%. Which variants a given app carries isn't always published, so check the lobby and each game's rules. Avoid 6 to 5 payouts and high-edge side bets. Our list of the best blackjack apps compares the partner apps.
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