Online Blackjack Guide

Blackjack's famous 0.5% house edge is real, but conditional: it assumes you play every hand correctly at a table with decent rules. Play by feel at a bad table and the edge triples. This guide covers the rules, the strategy that earns the good odds, and the table variations that matter.

The Rules in Two Minutes

Beat the dealer's hand without exceeding 21. Cards 2–10 count face value, pictures count 10, aces count 1 or 11. You and the dealer get two cards (one dealer card face up); you then choose:

• Hit — take another card
• Stand — keep your total
• Double down — double your bet, take exactly one card
• Split — turn a pair into two hands (with a second bet)
• Surrender (where offered) — forfeit half the bet and end the hand

A two-card 21 ("blackjack") pays 3:2 at proper tables. The dealer plays by fixed rules — typically drawing to 16 and standing on 17 — which is where the maths gets interesting: the dealer has no choices, so every edge you claim comes from making yours correctly.

Basic Strategy: The Whole Game

Basic strategy is the pre-computed optimal decision for every hand-vs-upcard combination. It's not card counting and it's not a betting system — it's simply not donating money through avoidable mistakes. The pillars:

1. Always split aces and eights Two aces are two chances at 21; sixteen is the worst hand in the game — splitting rescues both.
2. Never split tens or take insurance Twenty wins as it stands. Insurance is a side bet with a ~7% house edge dressed up as protection.
3. Double on 11 (and 10 vs dealer 9 or lower) You're favoured to make a strong hand — put more money in while you're ahead.
4. Stand on 12–16 against dealer 2–6, hit against 7–ace When the dealer's upcard is weak, let them bust; when it's strong, you must improve.
5. Use a chart for everything else Full basic strategy is ~270 cells. Keep a chart open in another window — it's legal, and online nobody's watching your table manners.

Table Rules That Change Your Odds

The rules are always in the game's info panel. The single biggest filter: skip any table paying 6:5 on blackjack — that one rule costs more than every other bad rule combined.

Side Bets: The Profit Center to Avoid

Perfect Pairs (house edge ~6%), 21+3 (~3–7%), Lucky Ladies (up to ~17%) — side bets exist because the main game earns the casino so little. Every dollar moved from the main bet to a side bet multiplies its expected cost by up to twenty. The disciplined play is boring and profitable-adjacent: main hand only, basic strategy, correct table.

RNG vs Live Dealer Blackjack

• RNG blackjack: instant hands, lowest minimums ($0.10 at some casinos), perfect for strategy practice.
• Live dealer: real cards on stream, social atmosphere, higher minimums ($1–5) and slower pace — which itself reduces hourly cost. See our live dealer guide.

Card counting doesn't work in either format — RNG reshuffles every hand and live studios cut deep. Take the 99.5% with basic strategy and be content; that's already the best deal in the building.

Frequently Asked Questions