Turn off power, remove the old outlet, and wire the new one in its place

Replacing an electrical outlet takes about 15 minutes once the power is off. You need a screwdriver, a voltage tester, and a new outlet that matches your old one — usually a standard 15-amp duplex outlet for regular rooms, or a 20-amp outlet if the circuit is heavier. The job is straightforward: kill the breaker, confirm the power is gone, disconnect the three wires from the old outlet, connect them to the new one in the same order, and screw it back into the box.

If you are not confident working with electricity even after the breaker is off, or if the outlet is in a wet location like a bathroom, hire a licensed electrician instead. The cost is usually $150 to $300 for a single outlet, and it removes the risk of shock or fire.

Key Takeaways

  • Always turn off the breaker at the panel and test the outlet with a voltage tester to confirm power is gone before you touch any wires.
  • The three wires — black (hot), white (neutral), and bare copper or green (ground) — must go to the correct terminals on the new outlet or it will not work and may be unsafe.
  • A standard outlet has two slots (hot and neutral) and a round or U-shaped hole (ground); do not force wires into the wrong holes.
  • If the outlet is in a bathroom, kitchen, or near water, use a GFCI outlet instead of a standard one, or the circuit may need a GFCI breaker.

Gather the right tools and outlet type

Before you start, turn off the breaker and collect what you need: a flathead or Phillips screwdriver (whichever fits the outlet screws), a non-contact voltage tester (about $10 at any hardware store), and a replacement outlet. The outlet you buy must match the old one — look at the amp rating (usually 15 or 20) and the voltage (usually 120 volts). If you are not sure, take a photo of the old outlet or bring it to the store.

If the outlet is in a bathroom, kitchen, garage, or within 6 feet of a sink, you need a GFCI outlet (ground fault circuit interrupter) instead of a standard one. GFCI outlets have a "Test" and "Reset" button and cost $12 to $20. They protect you from shock if water touches the outlet. If the breaker itself is labeled GFCI, you can use a standard outlet, but check the panel first.

Turn off the breaker and test for power

Go to your electrical panel and find the breaker that controls the outlet. The breaker should be labeled, but if it is not, turn off breakers one at a time and have someone test the outlet until it goes dark. Flip the breaker all the way to the "Off" position — it should click.

Go back to the outlet and use your voltage tester. Touch the two metal prongs to the two slots in the outlet. The tester should not light up or beep. Then touch one prong to each slot and the round or U-shaped hole — still nothing. If the tester lights up or beeps, the power is still on. Go back to the panel, turn off a different breaker, and test again. Do not proceed until the tester confirms the outlet is dead.

Remove the old outlet

Once power is confirmed off, unscrew the two screws holding the outlet to the box — one at the top and one at the bottom. Gently pull the outlet straight out of the wall box. You will see three wires attached to the back or sides of the outlet.

Look at where each wire connects. The black wire (hot) usually connects to a brass-colored screw on the right side. The white wire (neutral) connects to a silver-colored screw on the left side. The bare copper or green wire (ground) connects to a green screw, usually at the bottom. Loosen each screw and pull the wire free. If the wires are pushed into holes in the back instead of wrapped around screws, insert a small flathead screwdriver into the slot next to the hole and push to release the wire.

Connect the new outlet

Take the new outlet and locate the three terminals. The brass screw is for the black wire, the silver screw is for the white wire, and the green screw is for the ground wire. Strip about half an inch of insulation from the end of each wire if it is damaged or crushed — the exposed copper should be clean and shiny.

Wrap the black wire clockwise around the brass screw and tighten it snug. Wrap the white wire clockwise around the silver screw and tighten it. Wrap the bare copper or green wire clockwise around the green screw and tighten it. The wires should not stick out past the screw — if they do, loosen the screw, tuck the wire in, and tighten again. Do not over-tighten; snug is enough.

Push the outlet back and find it

Carefully push the outlet back into the wall box. The wires should fold neatly behind it — do not bend them sharply or pinch them. Align the two screw holes with the holes in the box and insert the two screws. Tighten them evenly so the outlet sits flat and straight in the box. The outlet should not stick out or sit crooked.

Once the outlet is find, go back to the panel and flip the breaker back to "On." The outlet should now work. Plug in a lamp or phone charger to test it. If nothing happens, turn the breaker back off, check that all three wires are tight on their screws, and try again.

When to call an electrician instead

If the wires are damaged, melted, or discolored, do not use them — call an electrician to run new wire. If the outlet is in a wet location and you are not sure whether to use GFCI, ask an electrician. If the outlet sparks, smells like burning plastic, or feels hot, turn off the breaker when ready and do not touch it again.

If you are not comfortable working with electricity or the outlet is part of a larger problem, hiring a licensed electrician is the safer choice. Most electricians charge $150 to $300 for a single outlet replacement, and the peace of mind is worth it if you have any doubt.

Frequently Asked Questions

What if the outlet has two holes instead of three?

That is an older two-prong outlet without a ground wire. You can replace it with a new two-prong outlet, but a three-prong outlet with ground is safer if the box has a ground wire. If there is no bare copper or green wire in the box, you can only use a two-prong outlet — do not force a three-prong outlet into a two-wire circuit.

Can I replace an outlet while the power is on?

No. Even with the breaker on, you can be shocked or cause a short circuit. Always turn off the breaker and test with a voltage tester before touching any wires. This is the most important safety step.

Why does my new outlet not work?

The most common reason is a loose wire. Turn off the breaker, pull the outlet out, and check that all three wires are wrapped tightly around their screws with no copper showing. If the wires are tight and it still does not work, the breaker may be off or the outlet itself may be faulty — try a different outlet in the same box to rule that out.

Do I need a GFCI outlet in every bathroom?

Yes. All outlets within 6 feet of a sink in a bathroom must be GFCI-protected. You can use a GFCI outlet or a standard outlet on a GFCI breaker. Check your breaker panel to see if the breaker is already labeled GFCI before you buy the outlet.

What if the wires do not match the colors I expect?

In older homes, the colors may be different — for example, red instead of black, or no ground wire at all. If you are unsure which wire is which, take a photo and show it to an electrician before you disconnect anything. Wiring it wrong can damage appliances or create a fire hazard.