How to Install a Microwave Under a Cabinet

Installing a microwave under a cabinet transforms wasted overhead space into functional counter real estate. This is one of the cleaner kitchen upgrades—it frees up counter space, lifts the microwave to a more ergonomic height, and looks intentional rather than appliance-cluttered. The catch is that the microwave hangs from whatever is above it, so the cabinet and wall studs have to do real work. Done well, the installation is stable, the wiring is safe and hidden, and the microwave sits flush and level. Done poorly, you've got a ticking liability and a counter that looks worse than before. The process breaks into three parallel tracks: securing the mounting bracket to studs, running power to the location, and hanging the microwave itself. You'll need a stud finder that works, a drill-driver that can handle lag bolts, and honesty about your electrical comfort level. If running new circuits or cutting into walls worries you, bring in an electrician for that piece. The mechanical hanging is straightforward enough that most people can handle it solo.

Find Your Anchor Points. Use a stud finder to locate the studs directly above where the microwave will sit. Mark the centers of at least two studs with a pencil. Measure down from the underside of the cabinet and mark your mounting bracket holes on the studs—typically 12–16 inches from the bottom of the cabinet, depending on your bracket kit. Double-check that the marks are level using a spirit level.
Lock the Bracket in Place. Drill pilot holes at your marked points using a bit slightly smaller than your lag bolts. Screw the lag bolts through the mounting bracket and into the studs using a socket wrench or adjustable wrench—tighten firmly but don't strip the studs. Use at least two bolts, ideally three if your bracket supports it. Check that the bracket is level and securely fastened before moving on.
Wire a Dedicated Circuit. If there's no outlet already positioned above or immediately adjacent to the cabinet, you'll need to run new wiring. Cut a hole in the cabinet back panel or the wall behind the cabinet to access the circuit. Run 12-gauge wire (for a 20-amp circuit, which is standard for microwaves) to a new outlet box secured to the cabinet or wall stud. If you're uncertain about circuit capacity, running new wire, or cutting into walls, hire an electrician for this step—it's the one place where mistakes create real hazards.
Verify Power and Prep the Unit. Before hanging anything, plug in a lamp or simple appliance to confirm the outlet works. Then unplug it. Check your microwave's electrical specifications and confirm they match your circuit capacity. Review the microwave's mounting instructions—some models require you to install brackets or clips to the unit itself before hanging. Do this assembly on the counter where you have space to work.
Hang and Secure the Unit. With a helper, lift the microwave up to the bracket, aligning the mounting holes or clips. Insert bolts or fasteners through the microwave's mounting points into the bracket, tightening by hand first, then with a wrench. Ensure the microwave sits flush against the cabinet and is level side-to-side and front-to-back. Tighten all fasteners fully once positioned.
Seal and Hide the Wiring. If there are gaps between the microwave and cabinet, use caulk or trim molding to finish the edge. Route the power cord along the back of the cabinet or through the wall cavity if you ran new wiring. Secure it with cable clips every 12–18 inches so it doesn't dangle. Test the microwave on a low setting to confirm it operates normally and that ventilation airflow isn't obstructed.
Run Final Checks Before Done. Plug in the microwave fully. Check that the outlet is secure and the wiring hasn't sagged or shifted. Test the microwave at different power levels and listen for any rattling or movement in the bracket. Check that door clearance is adequate—you should be able to open it fully without hitting the counter or wall. If everything is stable and quiet, the installation is complete.