Blackjack Basic Strategy: Why It Lowers the House Edge (But Doesn’t Remove It)
Basic strategy is the mathematically best way to play each hand. It narrows the casino's edge — it does not turn it around.
Table of contents
Quick answer
Blackjack basic strategy is a chart of the best play for every combination of your hand and the dealer's up-card. Used perfectly with favourable rules, it reduces the house edge to well under 1% — but the casino keeps an edge. Rules such as a 6:5 blackjack payout increase the edge significantly.
What basic strategy is
For every pair of your total and the dealer’s up-card there is one play — hit, stand, double, split or surrender — that loses the least over time. Basic strategy is simply that table.
Rules matter
| Rule | Effect on the player |
|---|---|
| Blackjack pays 3:2 | Better |
| Blackjack pays 6:5 | Much worse |
| Dealer stands on soft 17 | Better |
| Double after split allowed | Better |
| Fewer decks | Slightly better |
Common mistakes
- Taking insurance.
- Standing on 12–16 against a dealer 7 or higher.
- Not splitting aces and eights.
Frequently asked questions
Is 6:5 blackjack bad?
It pays less for a natural blackjack than the traditional 3:2, raising the house edge by roughly 1.4 percentage points.
Should I take insurance?
Mathematically it is a separate side bet with a house edge; basic strategy says no.
Sources & references
- BeGambleAware www.begambleaware.org
- National Council on Problem Gambling www.ncpgambling.org
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