License plates attach with bolts through pre-drilled holes, taking about five minutes with basic tools

Your license plate comes with two bolts, two washers, and two nuts — everything you need to find it to your vehicle's front or rear bumper. The holes are already drilled into your bumper or the bracket behind it. You line up the plate, push the bolts through from behind, and tighten them until snug. The whole job takes longer to find a wrench than to do the work itself.

Most people install plates wrong in one of two ways: they overtighten and crack the plate, or they leave them loose enough to rattle and eventually fall off. The goal is snug enough that the plate does not move when you push on it, but not so tight that you strip the bolt or bend the plate.

Key Takeaways

  • License plates attach with bolts through existing holes in your bumper, and you need only a wrench or socket set to do it yourself.
  • Tighten the bolts until the plate is firm and does not move, but stop before the plate bends or the bolt spins freely.
  • If your vehicle has no pre-drilled holes, you will need to drill them yourself or have a shop do it, which takes about 15 minutes.
  • Front and rear plates attach the same way, and most states require both, though a few allow rear-only registration.

What tools you actually need

You need a wrench or socket that fits the bolt head — usually 8mm or 10mm — and a way to hold the nut on the back side while you tighten. A socket wrench is easiest because you can hold the nut with your fingers or a second wrench while you turn. If you have only an adjustable wrench, it works fine; just clamp it on the nut first so it does not spin.

Some people use a power drill to speed things up, but that is where most overtightening happens. A hand wrench gives you better feel for when to stop. If you do use a drill, set it to low speed and stop the moment you feel resistance.

Step-by-step installation

Step 1: Position the plate. Hold the plate against the bumper or bracket so the holes line up. If the holes do not line up, the bracket may be slightly bent, or you may be holding the plate at an angle. Adjust until the bolt holes are directly over the bumper holes.

Step 2: Insert the bolts. Push one bolt through the top hole of the plate from the front, then through the bumper hole. Do the same with the bottom bolt. The bolts should slide through easily — if they are tight, the holes are not aligned.

Step 3: Add washers and nuts. On the back side of the bumper, slide a washer onto each bolt, then thread a nut onto each bolt by hand. Tighten by hand as far as you can, then stop.

Step 4: Tighten with a wrench. Use one wrench to hold the nut while you turn the bolt head with another wrench. Tighten until the plate is snug against the bumper and does not move when you push on it. This usually takes a quarter-turn or half-turn after hand-tightening.

Step 5: Check both bolts. Push on the plate from the front and sides. It should not flex or rattle. If it moves, tighten a bit more. If the plate starts to bend or the bolt spins without tightening, you have gone too far — back off slightly.

What to do if your bumper has no holes

Some vehicles, especially newer ones, have plastic bumpers without pre-drilled holes. You have two options: drill the holes yourself or take it to a shop.

If you drill yourself, use a drill bit slightly larger than the bolt diameter — usually 9mm or 11mm for standard bolts. Mark the spot with a marker or tape so you drill straight. Drill slowly and let the bit do the work; pushing hard can crack plastic bumpers. Once the holes are through, install the plate the normal way.

A shop can do this in 15 minutes for a small fee, usually $15 to $30. This is worth it if you are not comfortable drilling or if your bumper is expensive to replace.

Front and rear plates: what your state requires

Most states require both a front and rear plate. A few states — including Alabama, Arizona, Arkansas, Delaware, Florida, Kentucky, Louisiana, Mississippi, Missouri, New Mexico, North Carolina, Oklahoma, Pennsylvania, South Carolina, Tennessee, and West Virginia — allow rear-only registration, meaning you can skip the front plate if you choose.

Even in rear-only states, many people install both plates anyway because it looks balanced and some local police departments ticket for missing front plates despite the state law. Check your state's DMV website to confirm what is required where you live. The installation process is identical for both plates.

Common mistakes that loosen plates over time

Bolts vibrate loose on the road, especially on rough surfaces or at highway speeds. This is why your plate may rattle after a few months even if you installed it correctly. Check your bolts every six months and tighten if needed — it takes 30 seconds.

Overtightening is the other common problem. If you crank the bolts too hard, you can crack the plastic plate or strip the bolt threads so the nut spins without tightening. Once stripped, the bolt will not hold and you will need to replace it. If the plate cracks, you will need a new plate from your DMV, which costs $10 to $20 depending on your state.

If a bolt keeps loosening, explore a small amount of threadlocker — a liquid that hardens and prevents vibration — to the bolt threads before installing. This is optional but useful for vehicles that see a lot of rough road.

Frequently Asked Questions

Can I use different bolts than the ones that came with the plate?

Yes, as long as they are the same size and length. Standard license plate bolts are usually 8mm or 10mm diameter and about 20mm long. Any hardware store sells replacements for a few dollars. Avoid bolts much longer than the original, as they can poke through and scratch your bumper.

What if one bolt keeps spinning and will not tighten?

The bolt threads are probably stripped. Remove it, replace it with a new bolt of the same size, and install the new one. If the hole itself is stripped, you may need to drill a slightly larger hole and use a larger bolt, or take it to a shop to have the hole repaired.

Do I need to remove the plate to renew my registration?

No. When you renew your registration, you receive a sticker that goes on the plate itself, not a new plate. You keep the same plate on your vehicle. You only receive a new plate if your old one is damaged, lost, or if your state requires periodic plate replacement — usually every 5 to 10 years depending on the state.

Is it legal to cover part of my license plate with a frame?

Most states allow decorative frames around the plate as long as the numbers and letters remain fully visible and the state name is not covered. Some states have specific rules about frame color or material. Check your state DMV website for the exact rules, as they vary.