The short version
If you have to choose, choose by yard, not by company: the auction with a location you can drive to on a preview day, walk the car, and pick up from without a long tow is the better one for you, whichever name is on the gate. Beyond that, treat the two as the same product — insurance cars, no test drive, as-is, fees stacked on the hammer price, a storage clock running, and a rebuilt title at the end of the road. A buyer who previews in person, prices the repair, and checks the VIN's history will do fine at either. One who doesn't will lose money at both.
Copart and IAA — still called IAAI by most buyers, from its old name, Insurance Auto Auctions — are the two big salvage auctions in the US, and to a first-time buyer they look interchangeable: hundreds of yards, thousands of wrecked and not-so-wrecked cars, an online bidding screen, prices that seem to be half of retail. They are more alike than either would admit; the differences that matter are small, practical, and mostly about how you experience the process.
This is both auctions from the public buyer's seat: where the cars come from, whether you're allowed to bid, how the fees are structured, what you see before the hammer, and what happens after you win. The last section decides whether you should be here at all.
Where the cars come from
Both auctions grew up selling total-loss vehicles for insurance companies, and insurance is still the heart of both inventories. When an insurer decides a car isn't worth repairing — crash, flood, hail, theft recovery — it is towed to a yard, photographed, and listed. That pipeline explains the whole experience: cars arrive dirty, undriven, and described by someone paid to move them, not sell them.
Neither is purely insurance, and this is where the mix differs yard by yard. Both also sell consignments from dealers, rental and fleet companies, banks (repossessions), charities, and private sellers; those often carry clean titles and sit alongside the wrecks, so a filter for title type is the first thing to learn on either site. As a rough generalization, buyers tend to find Copart skewed a little more toward pure insurance salvage and IAA toward more dealer and fleet consignments — but the ratio depends on who feeds the yards near you, and it changes. Judge the yards you would actually pick up from, not the national picture.
Who is allowed to bid
Public access is the real fork, and your state decides it more than either company does. Many states restrict salvage-titled vehicles to licensed dealers or dismantlers; others let anyone buy them. Both auctions mirror those rules on every listing — a lot page says whether your state requires a business license to bid, so the same car can be open in one state and locked in the next. Clean-title consignments are generally open to public members at both. If a car is locked, both auctions work through registered brokers, who hold the license and bid for you. Registration, broker bidding, and payment are walked through in the Copart-specific guide; IAA is close enough that the same steps apply.
The membership structures differ in detail. Copart sells tiered public memberships, where the tier sets your bidding limit and whether a deposit is needed on file. IAA registers public buyers with its own requirements, which have included a deposit or verification step depending on the state and the vehicle. Both change their terms, so treat the current membership page as the source. At both, whether you can bid on a specific car depends on your membership level, your state's rules, and that car's title type.
How the money works, in general terms
The winning bid is the smaller part of what you pay. Each site publishes its fee schedule — the only source worth trusting for amounts — but the shape is the same at both (a broker adds a fee of their own on top):
- A buyer fee that scales with the sale price in tiers — steep enough at the low end that a cheap car can carry a surprisingly high percentage in fees
- An internet bidding fee on top of that for anything won online, which for a public buyer is everything
- A gate or loading fee for releasing the vehicle to you or your transporter
- Sales tax in most states unless you hold a resale certificate, plus any document fees passed through
- Storage after a short free window counted from the sale, not from pickup — the daily charge is where careless first-timers lose the most
- Late-payment penalties and, at worst, a voided sale with your deposit forfeited
Seeing the car before you bid
Both auctions let registered members preview vehicles at the yard in person before the sale, during business hours or on designated preview days. It is the most valuable thing either auction offers a public buyer, and most first-timers skip it because bidding from a phone feels the same. It isn't. Photos are taken quickly at intake, often before the car is dried out, and the description promises nothing beyond what intake saw.
Learn the lot-page vocabulary; it is the only condition report you'll get, and the terms mean less than they sound like:
- Primary and secondary damage — the intake person's label, not a shop estimate; "front end" says nothing about the frame rails behind it
- "Run and Drive" — at both auctions this means the car started and moved under its own power in the yard at some point; it is explicitly not a claim that it is roadworthy or will start again
- "Starts" or an engine-start designation — it cranked and ran when tested, and that is all
- Keys: yes or no — a missing key on a modern car is a real cost and sometimes a theft-history question
- Odometer status — "actual," "not actual," or "exempt"; "not actual" on a low-mile car is a warning, not a detail
- Title type — clean, salvage, certificate of destruction, or bill of sale only; a bill-of-sale car may never be titleable for the road in your state
- Airbags deployed, or a dash with the covers blown in the photos — doing that repair correctly is a large share of what makes salvage cars cheap
After the hammer: payment, pickup, transport
Winning is the fast part. Both auctions want payment within a short window measured in business days, by wire, cashier's check, or whatever the yard accepts, and both start charging storage soon after. Then the car has to leave. You usually need a pickup appointment, and a car that isn't drivable — your default assumption here — leaves on a flatbed or trailer. Both auctions offer or partner with transport you can book from the lot page; both also release to your own transporter with the paperwork.
The title follows separately, by mail after the sale clears, and can lag the car. Plan for a car in your driveway with no title: you can't register it, can't legally drive it, and in many states can't begin the rebuilt inspection until the salvage title is in your name.
What is exactly the same at both
The comparison hides a bigger question: whether a salvage auction is a place a first-time buyer should be at all. On the things that decide that, Copart and IAA are identical. There is no test drive. Everything is sold as-is, where-is, description disclaimed, no returns, buyer responsible for inspecting. A flood car with a salvage title looks, on a lot page, like any other salvage car; the signs of a flood car are under the carpet, not in the photos. And a salvage-titled car you win is a repair project: it cannot be registered until it is fixed, passes your state's inspection, and comes back branded rebuilt — a brand that stays on the title for life, lowers resale value, and leads some insurers to limit the coverage they will write.
Before bidding at either, do the homework you'd do on a private-party car — the auction does less of it for you, not more:
- Decode the VIN from the lot page and check for open recalls with the NHTSA lookup — a total loss doesn't close a recall
- Check the VIN against NICB VINCheck for theft and salvage records, and pull NMVTIS title history through an approved provider to see whether the car was branded before this insurer ever saw it
- If the car has been relisted by a flipper on Facebook Marketplace or Craigslist after the auction, run the ad through a free browser listing check — resale ads rarely say where the car came from
- Price the repair before you price the bid: airbags, a frame pull, and paint add up fast, and the damage label tells you almost nothing about them
- Ask your state DMV what a rebuilt inspection requires — some states want receipts for every part, some want the wreck photographed before repair
- Get an insurance quote on a rebuilt-title version of the car you're eyeing, so any coverage limits are a fact you know rather than a surprise