How much should I mark up special-order performance and diesel parts?
Short answer
Enough to cover the freight, the returns risk, and the capital tied up while you wait on backordered parts, typically 25 to 50 percent over your cost depending on how obscure the part is. Treating special-order performance parts like a stock brake pad markup leaves real money on the table.
Special-order parts carry costs a standard markup doesn't cover
A common brake pad you can return to your supplier next week if a job falls through. A special-order turbo, custom fuel system, or low-volume performance part often can't be returned once ordered, ships with real freight cost, and ties up your cash for weeks while you wait on it. A flat 20 percent shop-wide markup ignores all of that.
Build in enough margin to cover freight, the time value of cash sitting in a part that hasn't been installed yet, and the real risk that the job falls through and you're stuck holding non-returnable inventory.
Scale the markup with how obscure and risky the part is
Common performance parts you order regularly and know sell, keep those closer to your normal parts markup, maybe 25 to 30 percent, since you know the demand and the supplier relationship. Rare, high-dollar, or non-returnable specialty parts justify 40 to 50 percent or more, because you're carrying real risk that a standard-stock part never creates.
Don't be shy about this with customers. A performance customer chasing a rare part understands supplier lead times and freight costs better than most; they're not going to be shocked that a hard-to-source part costs more than a markup off a parts store shelf.
Quote parts pricing before you order, always
Never order a special-order part without the customer having agreed to the price in writing first, especially on non-returnable items. If a customer balks at the price after you've already ordered and paid for a non-returnable part, you're now stuck either eating the cost or fighting over it, and neither outcome is good.
Markup scaled by part risk
| Common performance part, returnable, regular supplier | 25-30% markup |
|---|---|
| Rare/specialty part, non-returnable, long lead time | 40-50% markup |
| Example: turbo cost $2,200, markup at 45% | sells for $3,190 |
| Freight and handling on oversized/international parts | pass through separately, don't bury in markup |
The math: Markup percentage should rise with non-returnability and lead time risk, not stay flat across every part regardless of how exposed you are if the job falls through.
Where owners get this wrong
- Using the same markup on a common part and a rare, non-returnable one.
- Ordering a special-order part before the customer has agreed to the price in writing.
- Burying freight cost inside the markup instead of showing it as its own line, which makes your pricing look inflated for no clear reason.
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