Somewhere along the way, almost everyone heard the same advice: after a car accident, get three estimates before you let anyone touch your vehicle. It sounds responsible, and for decades it was sometimes true. Today, for most collision claims, it is mostly outdated. In the vast majority of cases you need exactly one estimate, written by the shop you have chosen to do the work, and that shop can take the claim the rest of the way for you.

Where the "three estimates" rule came from

The three-estimate habit is a holdover from an earlier era of claims handling. Years ago, before digital estimating systems and standardized labor databases, an insurer had a harder time knowing whether a single repair quote was reasonable. Asking the customer to gather a few quotes and then settling somewhere in the middle was a rough way to find a fair number. The practice stuck in the public imagination long after the technology that made it necessary went away.

Today, adjusters and shops both write estimates using the same industry software and the same regional labor rates, so the starting numbers are far more consistent than they used to be. The result is that requiring three separate quotes for an everyday collision repair is now the exception, not the rule. Knowing how the modern car insurance claim process actually flows, from the first phone call to final repair, saves you from chasing paperwork you do not need.

What your insurer can actually require

It helps to separate two different things your insurance company is allowed to do. First, the insurer almost always has the right to inspect the damage and write its own appraisal. According to the California Department of Insurance, a qualified adjuster or appraiser usually inspects the vehicle and then writes an estimate based on that initial inspection. That appraisal is the insurer's opening position on what the repair should cost, and it is normal for it to exist alongside your shop's estimate.

Second, for smaller losses, your insurer may ask you to submit a competitive repair estimate. The same California guidance notes that if the damage is relatively minor, the company may instead ask you to submit competitive repair estimates. Notice the word "minor." This is not a blanket demand for three quotes on every claim. It is a tool insurers use on light damage where a quick comparison settles the number. For a meaningful collision, the path is usually a single shop estimate plus the insurer's own appraisal.

What your insurer cannot do is steer you into a particular body shop. Under California law, an insurer may not require that your vehicle be repaired at a specific repair shop. The company can recommend one of its network shops only after telling you, in writing, that you have the right to choose your own. That distinction matters, because the shop you pick is the shop that writes the estimate that drives your repair.

Your right to one estimate from the shop you choose

Here is the part that takes the pressure off. Because the choice of repairer is yours, you do not have to shop around for estimates to protect your claim. You can call your chosen shop first, have them inspect the car, and let their written estimate become the working document for the repair. In California, the customer's right to select the repair facility is protected by statute, and an insurer that recommends a shop has to first inform you in writing of your right to go elsewhere.

This is also where the timing of your first phone call matters. When a stressed driver calls the insurance company before calling a shop, it is common for the insurer to suggest one of its direct repair program shops. Those suggestions are legal as long as your right to choose is disclosed, but they are still suggestions. If you call a shop first, that shop writes your estimate, opens the conversation with the adjuster, and keeps your repair on a track you control. If you want a deeper walk-through of that sequence, our guide on the collision claim process step by step lays it out in order.

You do not need three estimates to prove a fair price. You need one good shop that writes the estimate and stands behind it.

How the insurer's appraisal and the shop's estimate reconcile

So if your shop writes one estimate and the insurer writes another, what happens when the two numbers do not match? This is the question behind most claim anxiety, and the answer is usually undramatic: the two estimates get reconciled. The shop and the adjuster compare line items, talk through the differences, and agree on a repair plan. Differences are normal, because a shop that will actually perform the work often sees operations and parts that a quick visual appraisal missed.

It helps to understand what each document is for. The insurer's appraisal is a payment estimate, built to put a fair dollar figure on the loss. The shop's estimate is a repair plan, built to return the car to its pre-accident condition using the correct procedures and parts. When they differ, the gap is closed through documentation, not through a tug of war you have to referee yourself.

California gives this process a backstop. If you choose your own shop, the insurer is required to pay the reasonable cost to repair the vehicle in accordance with accepted trade standards, and it cannot discount that cost down to what its own recommended shop would have charged. In other words, choosing your shop does not put you on the hook for the difference between a careful repair plan and a bargain quote. The standard the law points to is a proper repair, and a certified shop documents its estimate against manufacturer procedures so the adjuster has a clear, defensible reason to approve each line. That documentation is what turns two different numbers into one agreed plan, and it is far more persuasive than a stack of competing quotes from shops that will never see the car again.

Supplements: when the real number shows up later

The single biggest reason a first estimate is rarely the final estimate is hidden damage. An adjuster or appraiser writes the opening estimate from what is visible, but a bumper cover can pop back into shape over a crushed reinforcement bar, and a fender can hide a bent bracket or a damaged sensor mount. None of that is apparent until the shop begins disassembly. This is exactly why gathering three early estimates does little good: no quick visual quote, no matter how many you collect, can see behind the panels.

When the shop finds additional damage during the repair, it files a supplement, which is a request to the insurer to approve the extra work. The California Department of Insurance describes this plainly: if further damage is found during the repair process, the shop will contact the insurer to get approval for the additional cost of repairs. The insurer may send an adjuster to re-inspect, the supplement is approved, and the repair continues. You are responsible for your deductible, not for the supplement itself.

This is also where the parts conversation comes up. Many policies are written around components of "like kind and quality," which can mean aftermarket or recycled parts. You generally have the right to ask questions about every line item, and a certified shop can document why genuine factory parts are needed for safety systems and structural pieces. If parts are a concern for your vehicle, our overview of your right to choose your body shop explains how that choice protects both the repair and the parts that go into it.

It is worth knowing the rhythm of a supplement so it does not feel like a delay nobody warned you about. The shop disassembles the damaged area, photographs and measures the new findings, and writes them up as a revised estimate with the additional parts and labor. That document goes to your insurer, who may approve it on paper or send an adjuster back to re-inspect. Once approved, the shop orders any newly needed parts and continues the repair. The main thing a supplement can affect is timing, because a part discovered mid-repair has to be ordered after the fact rather than waiting on the shelf. A thorough shop reduces that risk by doing a careful teardown early, which is one more reason a single, well-documented estimate from the shop doing the work beats a handful of quick quotes that never reach the disassembly stage.

When a second opinion actually helps

None of this means a second estimate is always pointless. There are a few situations where getting another set of eyes is genuinely worth your time. The first is a total loss dispute. If your insurer declares the car a total loss and you believe it is repairable, or you disagree with the settlement value, a second opinion and the policy's appraisal clause can help. Most standard California policies contain an appraisal provision that lets either side demand an independent appraisal when there is a dispute over a total loss settlement, with a neutral umpire breaking any tie.

The second situation is when you simply do not trust the shop that wrote the first estimate, or the shop is pressuring you. You are never locked in. The third is when the damage sits near the repair-versus-replace line on a structural part, and a more thorough teardown could change the plan. In each of these, the goal is not to satisfy an outdated rule. It is to get an accurate picture of your specific car. A free second estimate from a certified shop costs you nothing and can give you real clarity. You can also read what we recommend you actually say in what to say to your insurer so the conversation goes smoothly.

For everyday collision work, though, the takeaway is simple. The car insurance claim process is built around your chosen shop's estimate and your insurer's appraisal, reconciled through normal back-and-forth and supplements. Three competing quotes are rarely the thing standing between you and a properly repaired car. A capable shop that writes a careful estimate and handles the adjuster is. If you want to see how that handoff works on a real repair, our auto body repair page walks through what we do once your estimate is written.