Official Gin Rummy Rules - Complete Guide to Playing

Overview

Gin Rummy is a two-player card game played with a standard 52-card deck. Created in 1909, it remains one of the most beloved card games worldwide thanks to its perfect balance of simplicity and strategic depth.

The objective is straightforward: arrange the cards in your hand into valid combinations called melds while minimizing the point value of your unmatched cards, known as deadwood. The first player to reach a target score (typically 100 points) across multiple rounds wins the game.

What You Need

• Players: 2 (standard game)
• Deck: One standard 52-card deck (no jokers)
• Scoring materials: Pen and paper or a score-tracking app

Card Values

Understanding card values is essential for managing your deadwood:

Key rule: Aces are always worth 1 point — never 11. Face cards (J, Q, K) are all worth 10 points, the same as the 10 card.

The Deal

Determining the First Dealer

Each player draws one card from the shuffled deck. The player with the lower card deals first. If both draw the same rank, draw again. After the first hand, the winner of each hand deals the next one.

Dealing the Cards

1. Shuffle the deck thoroughly.
2. Deal 10 cards to each player, one at a time, alternating between players (one to opponent, one to yourself, repeat).
3. Place the remaining 32 cards face down in the center — this is the stock pile.
4. Turn the top card of the stock pile face up and place it beside the stock pile — this starts the discard pile and is called the upcard.

After the deal: each player holds 10 cards, and there are 31 cards in the stock pile plus the 1 face-up upcard.

Types of Melds

There are two types of valid melds in Gin Rummy:

Sets (Groups or Books)

A set consists of three or four cards of the same rank in different suits.

Sets can consist of exactly 3 or exactly 4 cards — no more, no fewer.

Runs (Sequences)

A run consists of three or more consecutive cards of the same suit.

Runs must be at least 3 cards and can extend up to 13 (A through K in the same suit, with Ace at the low end).

The One-Meld Rule

A single card cannot belong to two melds simultaneously. If the 7♥ could fit into both a set of 7s and a heart run, you must choose one — you cannot count it in both.

This rule also means you should always find the meld arrangement that minimizes your total deadwood. Sometimes two possible arrangements leave different amounts of deadwood, and you should choose the lower one.

Gameplay

The Opening Turn

The non-dealer goes first. Before they draw from the stock pile, they are offered the upcard (the face-up card that started the discard pile):

• Non-dealer may take the upcard — if they want it, they pick it up and the hand proceeds normally (they must then discard).
• Non-dealer declines — the dealer is then offered the upcard under the same conditions.
• Both players decline — the non-dealer draws from the top of the stock pile and the hand proceeds.

Rule clarification: If the non-dealer takes the upcard, the dealer does not get an offer. The dealer only gets offered the upcard if the non-dealer declines.

After the opening, turns alternate: non-dealer, dealer, non-dealer, dealer, and so on.

Taking a Turn

Every turn after the opening follows the same two-step structure:

Step 1 — Draw: Take exactly one card from either:

• The stock pile (top card only, face down — unknown)
• The discard pile (top card only, face up — visible to both players)

You may not look at stock pile cards before deciding whether to take one. You may not take a discard pile card and then change your mind and take from the stock pile instead.

Step 2 — Discard: Place exactly one card from your hand face up on top of the discard pile. Your hand returns to 10 cards. Your turn ends.

You cannot discard the card you just drew from the discard pile on the same turn. If you pick up the top discard, you must keep it through this turn and discard a different card.

What You Cannot Do

• You cannot pass your turn without drawing and discarding.
• You cannot look through the discard pile — only the top card is available.
• You cannot take more than one card per turn.
• You cannot discard the card you just took from the discard pile.

Goal During Play

On each turn, work toward:

• Forming melds — building sets and runs reduces your deadwood to zero
• Reducing deadwood — discarding high-value unmatched cards lowers your point exposure
• Information gathering — tracking what your opponent takes from the discard pile helps you estimate their hand

Ending a Hand

A hand can end in three ways:

1. Knocking

When your deadwood totals 10 points or fewer, you may choose to knock on your turn after drawing. Knocking is optional — you do not have to knock just because you are eligible.

The knock procedure:

1. Draw a card as usual (from stock pile or discard pile).
2. Select your discard and place it face down on the discard pile. The face-down discard signals a knock — this distinguishes it from a regular turn.
3. Lay your hand face up on the table, clearly separating your melds from your deadwood.

After a knock — the lay-off phase:

Your opponent now arranges their hand. They may lay off unmatched cards from their deadwood onto your exposed melds:

• Add the fourth card to your three-card set (e.g., you have 7♠ 7♥ 7♦ — they lay off 7♣)
• Extend either end of your run (e.g., you have 4♥ 5♥ 6♥ — they lay off 3♥ or 7♥)

Laying off is optional but almost always beneficial — it reduces the opponent’s deadwood, shrinking the knocker’s winning margin or even triggering an undercut.

Scoring a knock:

After lay-offs, both players count their remaining deadwood. The knocker scores the difference:

Knocker’s points = Opponent’s deadwood − Knocker’s deadwood

The undercut exception: If the opponent’s deadwood after lay-offs is equal to or less than the knocker’s deadwood, the opponent has undercut the knocker. Instead of the knocker scoring, the opponent scores:

Undercut score = 25 (bonus) + Knocker’s deadwood − Opponent’s deadwood

Even if both players have equal deadwood, it is still an undercut — the opponent scores 25 points.

2. Going Gin

If you form melds with all 10 cards and have zero deadwood, you can declare Gin on your turn after drawing.

The Gin procedure:

1. Draw a card as usual.
2. Discard one card face up (unlike a knock’s face-down discard).
3. Declare “Gin.”
4. Lay all 10 remaining cards face up in their melds.

Key Gin rules:

• Your opponent cannot lay off any cards — no lay-off phase occurs.
• The Gin player scores the opponent’s full deadwood (no reductions) plus 25 points as a Gin bonus.

Gin score = Opponent’s full deadwood + 25

An undercut cannot occur after Gin. Gin is the strongest way to end a hand.

3. Draw (Stalemate)

If the stock pile is reduced to two cards and neither player has knocked or gone Gin, the hand is a draw. No points are awarded, cards are collected, and the same dealer deals a new hand.

The two remaining stock pile cards are never drawn — the hand ends when two remain.

Scoring Summary

Winning the Game

The game is typically played to 100 cumulative points. Once a player reaches or exceeds 100 points at the end of a hand, the game triggers final scoring with bonuses added:

Game Bonus

The winner (first to 100) receives a flat 100-point bonus.

Box Bonus (Line Bonus)

Each player receives 25 points for every hand they won during the game — regardless of how many points those hands were worth. Box bonuses are calculated for both players, not just the winner.

Shutout Bonus (Schneider / Blitz)

If the losing player never won a single hand throughout the entire game, the winner’s game bonus doubles to 200 points. Box bonuses still apply normally.

Final Score Calculation

Total = Cumulative hand points + (25 × hands won) + Game bonus (winner only)

The margin of victory is the difference between the two players’ final totals. In stake games, this margin determines payment.

Full example:

Key Rules Reference

Official vs. House Rules

The rules above represent the standard (official) Gin Rummy rules as widely taught and used in competitive play. Many casual players use house rules that may differ, including:

• Different knock thresholds — some groups play with a threshold of 5 or 7 instead of 10.
• No lay-off rule — some play that lay-offs are not permitted after any knock (stricter, not standard).
• Different target scores — some play to 150 or 200 points instead of 100.
• Oklahoma Gin rules — a widely popular variant where the upcard sets the knock threshold each hand.

When playing with new people, always confirm which rules are in effect before the first hand.

Next Steps

Now that you understand the rules, check out our How to Play guide for a beginner-friendly walkthrough, or dive into Strategy to start winning more games.

Detailed Rule Guides

For in-depth coverage of each rule area:

• Knocking Rules — full rules for when and how to knock, including the signaling procedure and scoring

• Going Gin Rules — rules for declaring Gin, Big Gin, and how Gin scoring differs from knocking

• Undercut Rules — when an undercut occurs, how it’s scored, and rule edge cases

• Laying Off Rules — which cards can be laid off, when laying off is optional, and its effect on scoring

• Tournament & Casino Rules — formal rules used in competitive play

Rules Edge Cases & Common Questions

• Can You Knock on the First Turn? — yes, with zero restrictions if eligible
• What Happens When the Stock Pile Runs Out? — the 2-card draw rule explained
• Knocking with Zero Deadwood — Knock vs Gin — why you should always go Gin, not knock
• What If You Forget to Knock? — missed knocks, accidental discards, and illegal knock penalties