How to Manage Sublet Work Without Losing Profit or Control
Sublet work is unavoidable, mechanical, glass, upholstery, wheel repair. But unmanaged sublets quietly drain 5-10% of your margins. Here's how to track, negotiate, and profit from every sublet dollar.
The Hidden Sublet Problem
"Sublet work isn't just a cost center. With proper management, it's a profit center that earns margin on every dollar of outsourced work."
Every collision repair involves sublet work, mechanical alignments, glass replacement, upholstery repair, wheel refinishing, towing. Your own sublet costs are a calculation, not an industry average. Total what you paid outside vendors last year, divide by total repair revenue for the same period, and a moderate-volume shop can see exactly how much of every repair dollar leaves the building. Most shop owners treat sublets as pass-through costs: the vendor charges $400, you bill the insurer $400, nobody tracks margin. But top-performing shops treat sublets as a profit center. They negotiate vendor pricing, apply appropriate markups, and track sublet turnaround as carefully as they track in-house cycle time.
The Sublet Markup Question
Should you mark up sublet work? Yes. Every industry does.
Why markup is justified, You're managing the vendor relationship, coordinating scheduling, handling logistics, accepting liability for quality, and managing the billing. This is work that has value.
Standard markup range, Set your own percentage and apply it to every sublet line. Markup is vendor cost plus that percentage: at 20% a $400 alignment bills at $480 on the repair order, and at 25% it bills at $500. Insurers expect reasonable markup on sublet.
What to include in markup, Your time coordinating, your liability risk, your accounts payable processing, and the opportunity cost of managing the vendor instead of doing in-house work.
What insurers accept, Insurers vary on sublet markup, and consistency is what survives review. Document the markup and apply it uniformly to every claim.
Pro Tip
Create a standard sublet markup policy and apply it to every RO. Inconsistent markup invites scrutiny. Consistent, documented markup is professional standard practice.
Selecting and Managing Sublet Vendors
Quality first, A cheap vendor who does poor work creates comebacks that cost more than the savings. Evaluate vendors on quality, turnaround, and reliability, not just price.
Negotiate volume pricing, If you're sending a vendor 10+ jobs per month, you have leverage. Negotiate 10-15% below their retail rate. Your volume is valuable to them.
Set turnaround expectations, A mechanical sublet that takes 3 days instead of 1 adds 2 days to your cycle time. Define turnaround expectations upfront and track actual performance.
Maintain backup vendors, Never rely on a single vendor for any sublet category. If your primary glass vendor is backed up, having a reliable secondary prevents cycle time delays.
Review quarterly, Are your sublet vendors still competitive? Still meeting turnaround targets? Still delivering quality? Review and adjust quarterly.
Tracking Sublet Impact on Cycle Time
Sublet delays are the number one hidden cause of extended cycle times.
Track sublet order date vs. completion date, How long is each sublet actually taking? If mechanical work consistently takes 3 days when it should take 1, that's a vendor problem or a scheduling problem.
Schedule sublets proactively, Don't wait until the vehicle reaches the sublet phase. Schedule the sublet when the repair plan is finalized. This gives the vendor lead time and reduces waiting.
Coordinate pickup and delivery, Does the vendor pick up? Do you deliver? How long does transport take? Optimize logistics to minimize dead time.
Flag sublet-dependent repairs, If a repair can't proceed without sublet completion, make that dependency visible in your production schedule. Don't discover the bottleneck when the vehicle is sitting waiting.
Getting Started
Pull your sublet invoices from the last 3 months. Calculate total sublet spend, average markup (if any), and average turnaround time per vendor. You'll likely find at least one vendor who's underperforming on turnaround and at least one sublet category where you're not capturing margin. Fix both this month.
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