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Drilling tile is mostly a matter of controlling heat, pressure and movement. The tile may look solid, but a bit that slips across its glaze can scratch it, and a sudden push can crack it—especially near an edge or over a hollow spot. Use a bit made for tile, keep the drill out of hammer mode, and take your time. The process is straightforward once you have the right bit and know what is behind the tile.
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Choose the right bit for the tile
For one or two holes in ordinary ceramic wall tile, a carbide-tipped masonry bit rated for tile is usually the least expensive practical choice. A carbide tile bit has a pointed or shaped tip that helps it start without skidding. It will work more slowly than a diamond bit, and it can wear out faster, but that is often fine for a small household job.
Diamond-tipped bits cut a wider range of tile, including hard porcelain, and are a better bet for multiple holes or a dense, glazed surface. They cost more and need cooling. A diamond tile bit can be a hole saw for larger openings or a small tubular bit for a round hole. Check the package for the tile types and hole sizes it supports.
| Bit type | Best for | Trade-off |
|---|---|---|
| Carbide tile bit | A few small holes in ceramic tile | Slower on hard porcelain; wears with use |
| Diamond bit | Porcelain, repeated holes or larger openings | Higher cost; needs cooling and careful handling |
| General-purpose masonry bit | Brick or concrete after the tile layer | Can skate or chip tile; do not start the hole with it unless it is rated for tile |
A regular twist bit is for wood and metal, not tile. It is likely to skate on the glaze or overheat. Also, don’t use a hammer drill setting on the tile: its rapid impacts can fracture the surface. If you have a hammer drill, switch it to standard rotation before touching the tile.
Check the wall and mark the hole
Before drilling, check for electrical wires and plumbing where you plan to make the hole. Use a suitable detector if you have one, and avoid drilling directly above or below outlets, taps and fixtures unless you know what is behind the wall. A short hole in tile can become a costly repair if it hits a pipe.
Measure the location, then put a small piece of masking tape over the mark. The tape gives the bit a little more grip and makes the mark easier to see; it does not make an unsuitable bit safe. For a larger hole saw, use a template or guide to keep the cup from wandering. Keep the hole as far from the tile edge as the fixture allows. Holes close to an edge concentrate stress and are more likely to chip or crack.
Drill through the tile slowly
Fit the bit securely and set the drill to its lowest speed range if it has two gears. Use a clutch or speed control that lets you maintain a steady, slow rotation—roughly a few hundred RPM is a sensible starting point for many small tile bits, but follow the bit maker’s instructions. Hold the drill square to the wall. Start gently, with light pressure; let the cutting edge do the work rather than leaning hard on the tool.
For a small carbide bit, keep the surface cool and pause if the bit gets hot. With a diamond bit, follow its cooling instructions. Some are designed for water, while others are meant to be used dry. Do not assume every diamond bit should be soaked. If water is required, use only a controlled amount and keep it away from the drill’s electrical parts. A spray bottle can help keep the cut cool without flooding the wall.
Once the bit has cut through the glazed surface, continue at a steady pace through the tile. Avoid side-to-side movement, which can enlarge the hole and stress the tile. If the bit squeals, stops cutting or develops a burnt smell, stop and check for heat, a worn bit or excessive pressure. Pushing harder is not a fix.
Change approach after the tile
When the bit passes through the tile, ease off rather than letting it punch into the wall. If the wall behind is wood, switch to a bit suited to wood. If it is masonry, use a masonry bit only after the tile is clear. Keep the drill in rotation-only mode until the bit is completely through the tile; only then consider hammer action for masonry, if the anchor instructions call for it and the tile cannot be struck by the hammering.
For a plastic wall plug in a tiled bathroom wall, drill the tile to the plug’s required diameter, then drill the substrate to the specified depth. Use a depth stop or a piece of tape on the bit as a visual guide. Brush or vacuum out dust before inserting the plug. Choose a wall anchor for the material behind the tile, not just the tile itself; tile is a finish, not a dependable anchor surface.
Common causes of cracks—and what to do instead
The main failure modes are hammering on the tile, using a bit that is blunt or meant for another material, pressing too hard, letting a diamond bit overheat, and drilling too close to an edge. Cracks can also start where tile is poorly supported or already damaged. If a tile sounds hollow when tapped, take extra care: it may have a void behind it, and even careful drilling carries more risk.
Do not try to correct a wandering hole by angling the drill while the bit is turning. Stop, bring the drill square and re-center carefully. For a large hole, a guide is worth using because a hole saw is harder to control than a small pointed bit. If the fixture allows it, moving the hole away from a grout line or tile edge can reduce the chance of a chip.
A quick check before starting
Confirm the bit diameter matches the anchor or fixture, the drill is set to rotation-only, and the wall is clear of likely services. Wear eye protection: tile chips and masonry dust are sharp. Keep the drill steady, use light pressure, and stop if the tile begins to chip or the bit overheats. For one small hole in standard ceramic, an inexpensive tile-rated carbide bit is often enough. For porcelain, repeated holes or a larger cutout, paying more for a suitable diamond bit is usually the more reliable choice.