No, coffee by itself does not kill roaches.

Are Roaches Attracted to Coffee?

Yes, cockroaches are drawn to the smell of coffee, especially used coffee grounds. The strong aroma can lure them into traps, making coffee a useful bait, but not a killer.

How to Use Coffee Grounds to Trap Roaches

You can create a simple DIY trap using coffee grounds & a jar.

What You’ll Need…

• A clean glass jar

• Wet coffee grounds

• Water

• A strip of tape or paper for roach access

Instructions

• Fill the jar with a few inches of water.

• Place wet coffee grounds in a small container or directly in the jar.

• Line the outside of the jar with tape or paper so roaches can climb in.

• Roaches attracted to the coffee fall into the jar and can’t escape.

This won’t kill them instantly, but they’ll eventually drown if left in the water.

Can Caffeine Kill Roaches?

In high doses, caffeine can be toxic to insects, but not in the small amounts found in coffee grounds. It’s not an effective roach killer on its own.