Splitting Pairs in Blackjack — Complete Guide

How Splitting Works

When your first two cards have the same value, you can split them into two separate hands:

1. Place a second bet equal to your original wager
2. Each card becomes the first card of a new hand
3. You receive a second card on each hand
4. Play each hand independently (hit, stand, double)

Splitting Rules to Know

• Re-splitting: Most casinos allow re-splitting up to 3-4 total hands
• Split Aces: Usually restricted — you receive only one card per Ace and cannot re-split
• Doubling after split (DAS): Most games allow it — this makes some splits more valuable
• Unequal 10s: You can split any two 10-value cards (e.g., King + Queen), though you never should

Pair-by-Pair Guide

Aces — Always Split

Why: A pair of Aces totals 2 or 12 — neither is good. But each Ace as a starting card gives you roughly a 31% chance of hitting 21 (any 10-value card).

Splitting Aces is so powerful that most casinos restrict it: one card only, no re-splitting, no doubling.

10s (10, J, Q, K) — Never Split

Why: A total of 20 wins approximately 92% of the time against any dealer card. It’s one of the best hands in blackjack. Splitting turns one near-guaranteed winner into two uncertain hands.

9s — Split Against 2-6, 8-9; Stand Against 7, 10, A

Why:

• Split vs. 2-6: The dealer is likely to bust, and two 9s are each strong starting cards
• Split vs. 8-9: Your 18 is tied or beaten; two 9s have better prospects
• Stand vs. 7: Your 18 beats the dealer’s likely 17
• Stand vs. 10, A: Splitting creates two hands that are underdogs against strong dealer cards

8s — Always Split

Why: A pair of 8s totals 16 — the worst hand in blackjack. It’s a losing hand no matter what you do. Splitting gives you two hands starting with 8, each of which is significantly better than 16.

Yes, even against dealer 9, 10, or Ace. You’ll lose money either way, but you lose less by splitting.

7s — Split Against 2-7; Hit Against 8-A

Why:

• Split vs. 2-7: Two starting 7s are reasonable hands against weak/medium dealer cards
• Hit vs. 8+: Against strong dealer cards, a total of 14 is bad, but splitting into two 7s isn’t significantly better

6s — Split Against 2-6; Hit Against 7-A

Why:

• Split vs. 2-6: The dealer is weak, and two 6s can each develop into decent hands
• Hit vs. 7+: Against strong dealers, you’d rather try to improve 12 than play two hands starting with 6

5s — Never Split (Double Instead)

Why: A pair of 5s totals 10 — one of the best doubling opportunities. Splitting gives you two terrible hands starting with 5. Double down against 2-9; hit against 10 or Ace.

4s — Split Against 5-6 (with DAS); Hit Otherwise

Why: A pair of 4s totals 8, which is fine for hitting. Splitting 4s is only slightly better when:

• The dealer shows 5 or 6 (very weak)
• You can double after splitting (DAS)
• Otherwise, just hit

3s — Split Against 2-7; Hit Against 8-A

Why:

• Split vs. 2-7: Even though 3s are small, splitting against weak/medium dealer cards is better than playing a hard 6
• Hit vs. 8+: Against strong dealers, neither playing option is great, but hitting gives you the best chance

2s — Split Against 2-7; Hit Against 8-A

Why: Same logic as 3s. A total of 4 is so low that hitting is fine, but splitting against weak dealer cards creates two chances to build winning hands.

Quick Reference Chart

P = Split, S = Stand, H = Hit, D = Double, P* = Split if DAS allowed, Hit otherwise