How to Estimate Salvage Repair Costs
Estimating · · 20 min read
A disciplined estimate beats a gut feeling at every auction.
Parts and labor
How parts and labor estimates really work
Understanding how shops build parts and labor lines helps you estimate an auction car more accurately and avoid the classic underestimate.
How an estimate comes together
Parts selection
OEM, aftermarket, or recycled parts each carry different prices and availability.
Labor operations
Each damaged area maps to remove, repair, or replace operations measured in hours.
Refinish time
Paint labor and materials are calculated per panel, including blends.
Sublet and calibration
Specialized work like calibration or glass is added as separate line items.
Labor line items buyers most often undercount
Blend time on adjacent panels
Painting only the repaired panel often looks wrong. Shops blend into neighbors, adding hours and materials the headline part count does not hint at.
R&I time for access
Remove-and-install operations on trim, fender liners, and bumper covers that must come off to reach the damaged area add up silently.
Diagnostic labor
Electrical faults, airbag system checks, and check-engine codes each carry diagnostic hours before any physical repair begins.
Alignment and calibration
A front or rear structural repair almost always requires a four-wheel alignment and potentially ADAS calibration, both billed separately from the body work.
Parts and labor questions answered
- How are labor hours determined for collision repair?
- Labor hours come from OEM repair procedures published for each make, model, and year. A shop's estimating software looks up the operation and applies the published time. For a pre-bid estimate, those same published times are a useful reference.
- Which parts tier should I use in a pre-bid estimate?
- Use the tier you actually intend to buy. An estimate built on aftermarket prices that you fill with OEM parts will blow your budget. Be honest with yourself before you commit the numbers to paper.
- What is the difference between repair and replace in an estimate?
- Replace means the part is removed and a new one installed. Repair means skilled labor restores the existing part to OEM condition. Replace costs more in parts; repair costs more in labor hours. The choice depends on the severity of the damage and the part's repairability.
- How do refinishing costs fit into a parts and labor estimate?
- Paint is typically its own line: base coat, clear, blend panels, and materials. It is calculated per panel and adds up fast on multi-panel hits. A common mistake is forgetting to include it at all until the shop invoice arrives.
Related estimating guides
Guides on OEM vs aftermarket parts, calibration, and hidden repair costs.
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The estimate that only counts parts and labor is the estimate that fails.
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