How to Track Contractor Costs by Project
Updated: 5 days ago
Contractor costs are easy to lose inside general subcontractor or outside-services accounts. When the business also tracks client projects, that makes it harder to compare delivery costs with project revenue. A consistent recordkeeping routine can show which engagement a contractor supported, what work was approved, and when the related cost was recorded.
Capture these details for each bill
Project and client: use the same project name used on estimates, invoices, and time records.
Work description: record the deliverable, phase, or approved task rather than relying on a vague note.
Dates and period: note when the work occurred and when the bill was received or paid.
Scope and approval: retain the purchase order, estimate, email approval, or change order that explains the work.
Pass-through or reimbursable status: identify expenses intended to be billed to the client and compare them with the invoice.
Use a repeatable monthly check
At month end, review contractor bills against the project list, approved scope, and client invoices. Look for costs with no project assignment, duplicate bills, work delivered outside the original scope, or pass-through costs that have not been invoiced. Compare project labor and outside services with the original estimate so the owner can ask whether the remaining budget fits the work still expected.
A short example
A marketing agency approves a $2,400 contractor invoice for video editing on Campaign A. If the vendor bill, approved estimate, and client project all carry a consistent identifier, the bookkeeper can place that cost in the right project view and compare it with the campaign’s fee. If the invoice covers several jobs, request enough detail to split it on a reasonable basis instead of assigning the full amount to one project.
How do you code a subcontractor invoice to a project in QuickBooks Online?
The short version: tag the bill to the project when you enter it, then let the project reports do the tracking.
In QuickBooks Online, make sure each client job exists as a project (or sub-customer) under the client.
On the contractor's bill, choose that project in the Customer/Project column on the line that records the work.
Use the same project name your estimates and client invoices already use, so the cost lands in the same view as the revenue.
At month end, open the project's profitability report and check the contractor cost against what was billed to the client.
If a single bill covers several projects, split the line and assign each piece to its project on a reasonable basis, such as hours or deliverables. If a bill has no project at all, that is exactly the gap the monthly review in the section above is designed to catch.
Contractor invoices are not the whole labor picture
A project’s delivery effort may also include employee, owner, or internal team time. Include that work in project reviews when appropriate records and a consistent allocation method are available. An incomplete time log should be identified as a limitation; it cannot support a precise labor cost by itself.
Keep tax and worker-status decisions separate
Project coding helps organize bookkeeping, but it does not determine whether a worker is legally a contractor or employee, or settle tax reporting obligations. Those questions depend on the facts and applicable rules. Ask the appropriate tax, legal, or payroll professional for guidance.
See contractor costs by job
If contractor bills are not consistently tied to projects, email SVS about project-cost tracking to ask how the current records can support clearer project reporting.
For help organizing these records, explore project cost accounting for creative businesses and monthly bookkeeping, or request a quote by email.
This article is general educational information, not accounting, tax, payroll, or legal advice. The example is illustrative.
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