Whether you are booking a shop or planning a DIY weekend, it helps to know how long a brake job actually takes. Times vary with the vehicle and what is being replaced, but there are solid ballpark figures. Here is what to expect.
Pads only
Replacing just the brake pads on one axle is the quickest job - roughly 30 minutes to an hour per axle for an experienced hand, longer for a first-timer. It involves removing the wheel, unbolting the caliper, swapping pads and hardware, compressing the piston, and reassembling - see how to install brake pads.
Pads and rotors
Doing pads and rotors together on an axle typically runs about 1 to 1.5 hours per axle. The extra time is removing the old rotor (which can be rust-stuck) and cleaning the hub before fitting the new one - see clean new rotors before install. A full four-wheel pad-and-rotor job is often 2 to 3 hours.
What adds time
Rusted-on rotors, seized caliper slide pins, rear calipers that must be wound in with a special tool, a fluid flush, or a stubborn parking brake all add time. Trucks and performance cars with bigger brakes take longer, and a seized bleeder or caliper can turn a quick job into a long one.
Plan for a little extra
Budget more time than the minimum for a first DIY attempt, and always bed the pads in afterward - see how to bed in pads. Having quality pads and fresh hardware on hand before you start keeps the job moving.