Subcontractor Management in QuickBooks for Roofing Contractors

Step 1: Set Up Subcontractors Correctly in QuickBooks

Every sub should be a Vendor in QuickBooks with W-9 information on file before the first payment. The setup checklist:

1. Create the Vendor record — legal name, address, SSN or EIN from their W-9
2. Check "Track payments for 1099" in vendor settings — this is the only way QuickBooks flags the sub for year-end 1099 reporting
3. Assign the correct expense account — Subcontractor Labor (COGS), not a generic Contractor Expense or Services Purchased account
4. Never pay a sub without a W-9 on file — once the payment is made and the sub is gone, getting a W-9 becomes very difficult

Step 2: Assign Every Sub Bill to Its QuickBooks Project

Sub costs that aren't assigned to a Project don't appear in your job profitability report. If a $6,000 sub invoice for the Henderson job is entered as a general bill without a Project assignment, the Henderson job shows zero subcontractor cost — and appears far more profitable than it actually is.

The fix: when entering a sub bill, always select the Project in the Customer/Project column on the bill line. This links the cost to the job and makes it visible in the Project Profitability report.

Step 3: Separate Subcontractor Costs from Employee Labor

Subcontractor payments (1099) and employee wages (W-2) have different tax treatments and different margin profiles. They must be in separate QuickBooks accounts:

Misclassifying W-2 employees as 1099 subcontractors is an IRS audit trigger with significant back-tax liability. If a worker shows up every day, uses your tools, and works exclusively for you — they are likely an employee regardless of how they're paid.

Step 4: Analyze Sub Costs to Protect Job Margins

Once sub costs are correctly assigned to Projects, the Project Profitability report becomes a powerful management tool. Sort jobs by gross margin and look at the sub cost column: if the lowest-margin jobs consistently have the highest subcontractor cost percentage, you have a sub pricing or selection problem — not a bidding problem.

Target subcontractor cost at 12–20% of job revenue on residential work. Above 25% consistently means sub rates have outpaced your bid pricing. The solution is renegotiating sub rates, adjusting your bid to reflect current sub costs, or self-performing more work with your own crews.