What Is Bleed in Printing (and How Much to Add)

 

Send a business card to print without bleed, and you'll get a thin white sliver along one or two edges once it's cut. Not because the printer made a mistake. Because paper moves, even by a fraction of a millimeter, every time a blade cuts through a stack of it.

Bleed is the extra bit of your design, color, or image that extends past where the piece will actually be trimmed. You build it into the file on purpose so that if the cut lands a hair off from where it's supposed to, there's still ink there instead of bare paper.

 

Why bleed exists

The common explanation is that presses can't print all the way to the paper's edge. That's true of the printer on your desk, feed grippers hold onto a small margin on at least one side, but it's not the real reason commercial print shops ask for bleed. On an offset or digital press, your design gets printed on a sheet larger than the finished piece, then a whole stack of them is trimmed down together with a guillotine blade. That blade doesn't land in exactly the same spot on sheet 1 and sheet 400. Bleed is the margin of error that covers the shift.

 

How much to add

The industry default is 0.125 inches (3mm) on every edge that touches the trim line. That number isn't arbitrary, it matches the tolerance most commercial cutting equipment is built to. For most jobs, that's the only figure you need to remember. A few situations call for more:

• Large-format posters and banners: 0.25 to 0.5 inches. Bigger sheets shift more under the blade, so the standard 0.125 inches isn't always enough.
• Die-cut shapes, anything that isn't a straight rectangle: at least 0.25 inches. A die can't register as precisely as a straight guillotine cut.
• Hardcover book covers: up to 0.8 inches. The cover has to wrap around the board and fold inside the front and back, so it needs far more coverage than a flat page.

Check with your printer before assuming. Bleed requirements are set by each shop's own equipment, and printers publish their own numbers for a reason.

 

The rule people forget: safe margin

Bleed stops white edges. It doesn't stop your logo from getting clipped. Keep any text or content you actually care about at least 0.25 inches inside the trim line, not the bleed line. Anything closer risks getting cut off if the blade lands slightly inside the trim mark instead of on it.

 

Setting it up

InDesign, Illustrator, and Affinity Publisher let you set bleed when you create the document. Word, Pages, and PowerPoint have no bleed setting at all, so you build the extra margin into the page size yourself: for a 5x7 postcard, set your page to 5.25 x 7.25 inches and treat the outer 0.125 inches as bleed.

One more thing worth knowing: most home inkjet and laser printers can't produce a true bleed print at all. What they call "borderless printing" is the machine printing a slightly oversized image and accepting some overspray at the edges, not the print-then-trim process a commercial shop uses. If you need a genuinely clean edge-to-edge print, that's a job for a print shop with a guillotine, not your desk printer.