A tiny star mark from a stone can sit there for weeks looking harmless. The catch is that the cheapest fix is usually before it looks urgent: once heat, vibration or a rough road turns it into a crack, the bill can jump several times over. A windscreen chip is a small impact pit in the outer glass layer, and it can often be sealed; once it spreads, replacement is usually the only realistic option.

Why the price jumps fast

On many cars, a simple chip repair is often around A$80–A$150. Leave it through a few hot days, a cold-morning demister blast, or a long highway run, and that same damage can become a full replacement costing roughly A$300–A$700 on a common model.

The reason is simple: laminated glass is strong, but it does not like sudden temperature changes or repeated flex. If you do a lot of freeway driving, park outside, or hit the odd pothole, a chip near the edge can spread surprisingly quickly. Once a crack starts running, repair quality drops sharply and many workshops will not attempt it.

The cost behind the glass

And on newer cars, the windscreen is no longer just glass. Many have ADAS (driver-assistance safety tech) cameras mounted behind it for lane support or emergency braking, and replacement may need recalibration so those systems “see” straight again. That extra step can add roughly A$200–A$500, and on some vehicles the total job can move into the A$700–A$1,500 range.

Insurance does not always make the maths better. Depending on the policy, the excess may be higher than a chip repair, and some drivers wait until the damage is “worth claiming”. That is the false economy: a repair that was cheaper than the excess can turn into a bigger claim, more downtime, and fewer choices about where the work is done.

When waiting stops saving

If you spot damage early, timing matters more than size alone. Fresh chips are easier to seal cleanly; once dirt or moisture gets in, even a small mark can become harder to fix well.

  • Fine lines are spreading from the impact point
  • The damage sits near the edge of the glass
  • It is in the driver’s main line of sight
  • The chip looks cloudy, dirty or wet inside
  • There is a camera or sensor housing behind the mirror

The practical move is simple: get a chip assessed before the next hot day, long trip or pressure wash. If it is still repairable, you are usually saving money not just on the glass, but on calibration, insurance headaches and time off the road.