Scrabble Rules Explained: The Complete Breakdown

Whether you're settling a dispute mid-game or preparing for your first tournament, this is the definitive guide to Scrabble rules. We cover every scenario: what counts as a legal play, how challenges work, when you can exchange tiles, and exactly how endgame scoring is calculated. Bookmark this page — you'll need it.

The Objective

Score the most points by forming valid words on the board. Points come from the letter values of your tiles, multiplied by any premium squares you cover. The player with the highest cumulative score when the game ends wins.

Game Setup

Place the board flat. All 100 tiles go face-down into the tile bag and are mixed. Each player draws one tile to determine turn order — the letter closest to A goes first (blanks beat A). Return those tiles and remix.

Each player draws 7 tiles and places them on their rack. Racks are kept hidden from other players throughout the game.

Turn Structure

On your turn, you must do exactly one of the following:

• ▶Play a word: Place one or more tiles on the board to form a valid word. All tiles played in a single turn must be placed in one row or one column. Every new combination of adjacent tiles must form a valid word.
• ▶Exchange tiles: Replace 1-7 tiles from your rack with new ones from the bag (only if 7+ tiles remain in the bag). You score zero.
• ▶Pass: Skip your turn entirely. You score zero.

After playing a word, draw tiles from the bag until you have 7 again (or until the bag is empty). Then the turn passes clockwise.

Legal Word Placement

The rules for placing tiles are strict but logical:

• ▶First word: Must cover the centre star (★) and be at least 2 tiles long
• ▶Subsequent words: Must connect to at least one existing tile already on the board
• ▶Direction: All tiles in a single play must be in the same row or same column — never diagonal
• ▶No gaps: Tiles must form a continuous word with no empty squares in between (existing tiles on the board count toward continuity)
• ▶All crosswords valid: Every new adjacent letter combination must be a valid word in its own right

Blank Tiles

Two blank tiles exist in every set. When playing a blank, you declare which letter it represents. The blank scores zero points but counts as that letter for all future purposes. Once placed, a blank cannot be moved or reassigned. A blank tile on the board can be used by other players as part of their words (as the declared letter).

Despite scoring zero, blanks are among the most valuable tiles in the game because they enable bingos and unlock otherwise impossible word formations.

The Challenge System

After a player places a word, any opponent may challenge it before the next player draws tiles. The word is checked against the official dictionary. There are two main rule systems:

Single Challenge (Tournament Standard)

• ▶If the word is invalid: The player removes all tiles placed that turn and loses their turn
• ▶If the word is valid: The challenger loses their next turn

Free Challenge (Common in Casual Play)

• ▶If the word is invalid: The player removes tiles and loses their turn
• ▶If the word is valid: No penalty for the challenger, play continues normally

Agree on which system you're using before the game starts. Not sure if a word is valid? Our free word finder checks against the SOWPODS dictionary in realtime — type it in and get instant confirmation with no signup.

Exchanging Tiles

If your rack contains letters you cannot productively play, you may exchange tiles instead of making a word. The rules for exchanging:

• ▶You must exchange at least 1 tile and may exchange up to all 7
• ▶There must be at least 7 tiles remaining in the bag
• ▶Place unwanted tiles face-down, draw replacements, then return the old tiles to the bag
• ▶You score zero points for the turn
• ▶You cannot play a word and exchange in the same turn

Scoring Rules

Scoring follows a specific order:

• ▶1. Add tile values: Sum the face value of every tile in the word (including tiles already on the board that are part of the word)
• ▶2. Apply letter multipliers: If a newly placed tile sits on a DL or TL square, multiply that tile's value by 2 or 3
• ▶3. Apply word multipliers: If any newly placed tile sits on a DW or TW square, multiply the entire word total by 2 or 3
• ▶4. Multiple multipliers stack: If you cover two DW squares in one play, the word is doubled twice (×4). A DW + TW = ×6.
• ▶5. Bingo bonus: If you play all 7 tiles in one turn, add 50 bonus points after all multipliers

Premium squares only count on the turn a tile is first placed on them. In subsequent turns, those squares have no effect.

For a full breakdown with examples, see our Scrabble Scoring Guide.

What Words Are Allowed?

Allowed words depend on which dictionary your group or tournament uses:

• ▶SOWPODS (Collins Scrabble Words): Used internationally. Contains approximately 280,000 valid words. This is what our word finder uses.
• ▶TWL (Tournament Word List): Used in North American tournaments. Slightly smaller than SOWPODS (~190,000 words).

Generally not allowed: proper nouns, abbreviations, prefixes/suffixes standing alone, hyphenated words, and words requiring apostrophes.

Endgame Rules

The game ends when one of these conditions is met:

• ▶Going out: A player uses their last tile when the bag is empty. That player adds the total value of all opponents' unplayed tiles to their score. Each opponent subtracts the value of their remaining tiles.
• ▶Six consecutive scoreless turns: If all players pass or exchange for six consecutive turns total (some variants use fewer), the game ends immediately. Each player subtracts their remaining tile values.

The player with the highest final score wins. In the event of a tie, the player who was ahead before final adjustments wins (tournament rule).

Uncommon Situations

• ▶Overdrawing: If a player accidentally draws too many tiles, their opponent selects the extra tile(s) at random from their rack and returns them to the bag
• ▶Tile left in bag: If the game ends with tiles still in the bag (rare, happens when all pass), those tiles stay uncounted
• ▶Time limits: Tournament games use chess clocks (typically 25 minutes per player). Going over time incurs a 10-point penalty per minute
• ▶Playing through a tile: You may place tiles with gaps between them if existing board tiles fill those gaps, forming one continuous word

House Rules vs Official Rules

Many casual players use "house rules" that differ from official play. Common house rules include allowing proper nouns, using a standard dictionary instead of SOWPODS/TWL, no time limits, and free challenges. These are fine for family games, but if you're preparing for competitive play, practise with the official rules to avoid surprises.

When disputes arise, having a reliable reference helps. Our word finder tool checks words against the SOWPODS dictionary automatically — just type and get instant validation, completely free.