Key takeaways
- The number did not change because anyone made a mistake. The first estimate described what could be seen with the car still together, and a supplement describes what was found once it came apart.
- This is a normal, expected part of a claim. According to the Texas Department of Insurance, "If the damage turns out to be worse than the adjuster originally thought, you or the repair shop can talk to the adjuster about raising the estimate."
- Your share usually does not move. TDI describes the deductible as "the amount of a claim that you must pay yourself," set by your policy, not by the size of the repair.
You dropped the car off with a number in hand. A few days later the shop calls and says the estimate went up, and your first thought is that somebody is padding the bill. That's a fair reaction, and there's a simpler explanation worth hearing first. The Texas Department of Insurance plans for it: its auto insurance guide says the company might extend a rental "if there are delays because the repair shop had to order parts or found more damage." Here's what's actually going on.
Why did my insurance estimate go up after repairs started?
Because of when it was written. A first estimate, whether it comes from an adjuster, from photos you uploaded, or from a shop walking around the car, describes damage that is visible while the car is still assembled. A modern vehicle hides most of its structure behind the parts you can see.
Think about what sits behind a front bumper cover: an energy absorber, a reinforcement bar, brackets, a radiator and its supports, wiring, and on many vehicles a radar sensor or a camera. None of that can be inspected until the cover is off. The same is true behind a quarter panel and inside a door.
So the first estimate is a starting document. It gets the car authorized and into a shop. The accurate number comes later, and that is by design, not by accident.
What is a supplement?
A supplement is an addition to an existing estimate. The shop documents what it found, with photos and part numbers, and sends it to your insurer for review. The insurer either approves it, asks questions, or asks to re-inspect the car.
It is the same claim, the same file and the same adjuster. Nothing restarts. A claim can have more than one supplement, because some things are only discoverable after the first round of parts is off.
TDI describes the sequence from the insurer's side: "The adjuster will estimate the cost of repairs. The company will base its payment on the adjuster's estimate." And then the part that matters to you: if the damage turns out to be worse than the adjuster originally thought, you or the repair shop can talk to the adjuster about raising the estimate. A supplement is that conversation, in writing, with evidence attached.
What actually shows up once the car is apart?
Different things on different cars, but they fall into a short list of categories.
| What was hidden | Where it turns up |
|---|---|
| Brackets, absorbers and reinforcement bars | Behind bumper covers and inside fenders |
| Structural damage and pushed mounting points | Once panels and lights are removed |
| Cracked or broken clips, retainers and one-time-use fasteners | Everywhere the car was taken apart |
| Sensors, cameras and wiring | Behind grilles, bumpers, mirrors and glass |
| Calibration and scan requirements | In the manufacturer's repair procedures for your vehicle |
| Prior damage or old repairs | Under the paint and inside the panel |
The last two surprise people the most. Depending on the vehicle, the maker's repair procedures can call for a scan before and after the repair, and for the driver assistance systems to be calibrated after certain parts come off, even if nothing about them looks broken. Those operations are written in the vehicle maker's procedures, and they often are not in a first estimate written from the outside.
Do I have to pay the difference?
Normally, no. On a covered claim, the supplement is between the shop and the insurer, and your out-of-pocket share is your deductible, which your policy sets. TDI puts it plainly: "You must pay a deductible for collision, comprehensive, and uninsured/underinsured motorist claims," and "A deductible is the amount of a claim that you must pay yourself." A larger repair does not make the deductible larger.
There are things you can choose to pay for, and those should be your decision, in writing, before the work happens. Upgrading to a part the insurer will not cover is the usual example. TDI notes that an insurer "is only required to pay for parts of like kind and quality to those that were damaged," and "doesn't have to pay for original parts from the manufacturer."
Two things worth asking your adjuster rather than the shop, because they belong to your policy and not to the repair: whether your rental coverage extends when a supplement adds days, and how your policy handles anything found that was not caused by this accident.
What if the insurer will not approve the added damage?
Then you have a documented disagreement, and Texas gives you a path through it. A common first step is a re-inspection, where the insurer sends someone to look at the car while it is apart. Seeing it in person settles a lot of these.
If it doesn't, Texas gives you three options.
- Your insurer can't gag the shop. Texas Insurance Code Section 1952.304 says an insurer may not prohibit a shop from telling you "the description, manufacturer, or source of the parts used," along with "the amounts charged to the insurer for the parts and related labor." Ask your shop for the line-by-line. A good one will print it.
- You can ask for an appraisal. TDI's guide describes the process: "you and the insurance company each hire an appraiser," then "the two appraisers then choose a third appraiser as an umpire," and "the umpire's decision is binding on both you and the insurance company." Check your policy for the appraisal clause before you start, because it has conditions.
- You can file a complaint if the insurer broke the state's repair rules. Under Section 1952.306, a policyholder, a third-party claimant or the shop may submit a written, documented complaint to the Texas Department of Insurance about a violation of this subchapter. TDI's consumer help line is 800-252-3439.
One more thing to keep in your pocket. The state requires insurers to give claimants a notice that reads, word for word: "By law, you have the right to select where your motor vehicle is repaired and the parts used for repairs. However, an insurance company is not required to pay more than a reasonable amount for such repairs and parts." That is from 28 TAC Section 5.501. Both halves of that sentence are true, and knowing both is what keeps a supplement conversation calm. We wrote about the first half in can my insurance company make me use their body shop in Texas.
What if the supplement makes it a total loss?
Sometimes added damage pushes the repair past what the vehicle was worth before the wreck, and at that point it is no longer a repair decision. The Texas Department of Motor Vehicles defines it: "A salvage motor vehicle means the vehicle was damaged to the extent that the cost for repair, which includes materials and labor, was more than the vehicle was worth before it was damaged."
TxDMV notes that insurance companies typically make that determination, and that there is an "Owner Retained" record for when the owner keeps the vehicle after a total loss is declared. If your claim is heading that direction, you want to hear it early, while the car is apart and the documentation is fresh, rather than at the end. A shop that tells you that on day four is doing you a favor, even though it is not the call you wanted.
Questions about a changed estimate?
If your estimate just changed and you have questions, call us. Star Auto Body has been in Howe since 1992, and we work with drivers from Howe, Van Alstyne, Sherman, Denison and the rest of Texoma. We work directly with insurance companies on claims.
Call (903) 532-5365, see what we repair on our services page, or request a free estimate.
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