The first estimate is a visual estimate
An appraiser can only write what they can see from the outside. Bumper reinforcements, brackets, sensors, radiator supports and wiring are hidden behind panels.
What a supplement is
Once the car is disassembled (the teardown), the shop finds damage that wasn't visible. They photograph it, write it up line by line and send a supplement request to the insurance company. The adjuster reviews and approves it, sometimes after a re-inspection.
Common supplement items
- Cracked bumper absorbers and brackets
- Bent reinforcement bars
- Damaged parking sensors or radar units
- Radiator, condenser or fan damage
- Wheel and suspension parts
- Calibration of cameras and sensors after repair
Who pays
On an approved claim the insurance company pays the supplement directly to the shop. Your deductible doesn't change.
Why it's a good sign
A shop that never supplements either didn't look carefully or isn't repairing the car fully. Documented supplements mean the hidden damage is being fixed, not covered up.
FAQ
Does a supplement mean the shop raised the price?
No. It means hidden damage was found and documented after disassembly. The insurer reviews each line before paying.
Will a supplement delay my repair?
Usually only by a day or two while the adjuster reviews it. A good shop sends photos the same day to keep things moving.
This article is general information, not legal or insurance advice. Rules and policies change — check your policy and the official source, or ask us.