Core charge
A core charge is a refundable deposit added to the price of a rebuildable part, such as an alternator, starter, battery or brake caliper. You get it back when the old part (the “core”) is returned to the supplier in rebuildable condition. On a repair invoice, show the core charge as its own line, and credit it if the core went back.
Parts that usually carry a core charge
| Part | Why |
|---|---|
| Alternators and starters | Remanufactured from old units |
| Batteries | Lead is recycled; many states require a core or deposit |
| Brake calipers | Rebuilt with new seals and pistons |
| Transmissions, engines, turbos | High-value rebuilds; large cores |
| Steering racks, AC compressors, CV axles | Commonly remanufactured |
How the refund works
- The supplier adds the core charge when you buy the part.
- You return the old part in the box, drained and not broken or disassembled.
- The supplier inspects it and credits the core charge to your account.
A cracked case, missing pieces or the wrong part number can mean no refund. Return cores promptly; many suppliers set a time limit.
On the customer’s invoice
- If you return the core: list the part at its price without the core, or show the core charge and a matching core credit.
- If the customer keeps the old part: add the core charge, because you won’t get it back from the supplier.
- Say on the estimate what will happen to replaced parts: returned to the customer, returned for core or warranty, or disposed of by the shop.
Many states give customers the right to get their replaced parts back if they ask before the work, except parts that must go back for a core or warranty claim. Note those parts on the estimate.
Replaced parts handled on paper. On a WrenchTicket estimate you choose whether replaced parts go back to the customer, the shop may dispose of them, or they return to the supplier for core or warranty, and it prints on the estimate and invoice. Pro adds approval links and the history. $15 a month.
Write an estimateQuestions
Is the core charge taxable?
It depends on the state. In some states sales tax applies to the core charge and is refunded with it; check your state’s rules or ask your parts supplier.
Can a customer bring their own core?
Yes, if it’s the same part number and rebuildable. Credit them only after the supplier accepts it.
What’s a dirty core?
The old, used part waiting to be returned. A clean core usually means one that passes the supplier’s inspection.
General information, checked November 1, 2026. Core terms vary by supplier; parts-return rules vary by state.
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Auto repair paperwork cheat sheet
What every estimate, repair order and invoice must show, the rules of the 10 largest states and a printable added-work approval log. We email it to you.