What is Rabbet?

A rabbet (spelled "rebate" in British English) is an L-shaped step cut into the edge of a board. It has two faces: a horizontal shelf and a vertical shoulder. The most common size in 3/4-inch stock is 3/8 x 3/8 inch.

Where rabbets appear. Cabinet backs fit into them along the rear edges of the case sides. Drawer sides join the front with them. Picture frames use the L-shaped channel to recess glass. Window sashes hold panes the same way.

Rabbet vs. dado vs. groove. A rabbet sits on the edge of a board. A dado is a channel cut across the face. A groove is a channel cut with the grain in the face. Position is the key difference.

Depth. Target 1/2 to 2/3 of the board thickness. For a 3/4-inch panel, that means 3/8 to 1/2 inch deep. Never go past half the material thickness on load-bearing joints.

Tools. A table saw with a dado blade set cuts the step in a single pass. A router with a bearing-guided bit follows edges cleanly, including curved ones. The traditional hand tool option is a rabbet plane.

Joint strength. Two advantages over butt joints: more glue surface area (the shelf adds a full face-grain to face-grain bond) and the shoulder physically prevents racking, keeping the assembly square under load. A double version, where both pieces have matching steps, is stronger still. SmartCutList factors rabbet dimensions into your cut list, ensuring the mating panel and the channel match perfectly.