How to streamline billing workflows and return project managers to the field
In most general contracting firms, the project manager is the most expensive administrative worker on the payroll—whether leadership realizes it or not.
Each month, across job sites nationwide, seasoned project managers hired for their ability to manage schedules, coordinate trades, and solve field problems are instead sitting at a desk updating spreadsheets, chasing subcontractor invoices and lien waivers, and manually assembling payment applications. These tasks aren't in their job description. But they've accumulated there over time, one billing cycle at a time, until they've become fixtures of the monthly routine.
This is a problem worth solving. Not because pay applications and budget tracking aren't important—they are critically important. But because the person doing them is often the wrong person, working without the right tools, in a process with no systematic guardrails.
This issue of The Fieldbook makes the case for change and offers a practical roadmap for implementation.
Project managers are expensive, typically costing firms $65–$80 per productive hour. The critical question: how many of those hours each month are spent on pay application preparation, budget reconciliation, subcontractor billing review, and lien waiver tracking?
Industry practitioners consistently report that administrative and financial tasks consume 15 to 30 percent of a PM's time on active projects. For a firm running four to eight jobs simultaneously, that represents a meaningful portion of the firm's most expensive operational resource.
The more significant cost, however, isn't the PM's time—it's what goes wrong when someone without accounting training prepares documents that drive cash flow. Common risks include billing errors, incorrect stored materials treatment, overbilling or underbilling on change orders, and missing or deficient lien waivers.
Having managed large commercial projects across the Intermountain West as an owner's representative, this pattern emerged repeatedly across firms of every size—from small specialty contractors to regional general contractors. A poorly prepared pay application doesn't just delay payment. It can trigger rejections, invite disputes, and expose the firm to lien law liability that costs far more than any billing clerk ever would.
The problem is compounded by the fact that these tasks are genuinely technical. Proper pay application preparation requires understanding of contract language, retainage provisions, stored materials treatment, and change order accounting. Done incorrectly, the consequences include delayed payment, compliance exposure, and damaged relationships with owners and construction lenders.
The pattern is understandable. When a general contractor is small, the project manager handles everything—because they're the only one who knows the project. As the firm grows, billing responsibilities grow with the project load but never get formally reassigned. There's no single moment when someone decides "PMs should run billing." It simply happens.
Several dynamics keep the problem stuck:
There's a less obvious cost buried in the subcontractor dynamic. When the project manager is responsible for chasing subs for compliant billing and lien waivers, it consumes relationship capital. Every friction point over an invoice format or missing waiver becomes a conversation about paperwork—instead of about the work. Moving that accountability to the accountant keeps the PM's interactions with subs focused on construction.
The alternative isn't complicated, but it requires intentional design. The core principle: financial and compliance functions should be owned by finance-trained personnel, supported by automation, and integrated with the accounting system from the start.
In practical terms, the project manager's role in the billing process narrows to two functions: confirming the completeness and accuracy of work billed as contracted, and approving the final application before submission. Everything else—preparation, subcontractor reconciliation, lien waiver tracking—is handled by an accountant or bookkeeper operating within a structured, automated system.
Confirms the completeness and accuracy of work billed as contracted. Approves the final pay application before submission. Initiates and tracks change orders. That's it.
Prepares the G702/G703 using approved payment applications and invoices. Reconciles subcontractor billings against contract values. Issues and tracks lien waivers. Manages retainage schedules. Flags discrepancies for PM review.
The model above works well with a disciplined manual process. It works exceptionally well when paired with the right automation tools. A practical technology stack for a mid-size general contractor doesn't necessarily require expensive new software.
Whether the firm uses QuickBooks, Sage, Foundation, or another platform, the accounting system should serve as the single source of truth for job cost data from day one of a project. Vendor bills, subcontractor payments, and cost codes all flow through it—and that data feeds everything downstream.
Whether working within a construction management platform like Procore or using a custom Excel workbook, the goal is the same: eliminate the manual rebuild every billing cycle. A well-designed template pulls job cost data, tracks cumulative billings, and generates a properly formatted G702/G703 automatically. What used to take hours can take minutes. Many firms already have these tools available in the software they own—they simply aren't using them, often because the PM is working around the tools rather than through the accountant who would actually adopt them.
Every subcontractor on the project receives the same onboarding packet at contract signing: a required invoice format, a billing deadline, a lien waiver template, and clear instructions for stored materials documentation. This eliminates the chaos of seventeen different invoice formats arriving at month-end and shifts the burden of compliance from the project manager to the accountant, where it belongs.
For firms with significant subcontractor volume, dedicated lien waiver platforms are worth serious consideration. They automate the collection, issuance, and tracking of lien waivers and substantially reduce the friction of monthly close. For smaller contractors, a well-maintained tracking log integrated with accounts payable accomplishes the same objective. Either way, the accountant owns the process, and nothing goes out without a waiver on file.
Below is a reference model for redistributing billing and financial tracking responsibilities. This framework works, and it improves the more consistently it's applied.
| Function | Current Owner | Recommended Owner | Tool / Method |
|---|---|---|---|
| Budget Tracking | Project Manager | Accountant / Bookkeeper | Accounting System + Automated Job Cost Report |
| Pay App Prep (G702/G703) | Project Manager | Accountant / Bookkeeper | Construction Mgmt Software or Automated Excel Template |
| Subcontractor Billing Review | Project Manager | Accountant / Bookkeeper | Standardized Sub Billing Packet |
| Lien Waiver Tracking | Project Manager / Admin | Accountant / Bookkeeper | Automated Platform; Excel for Smaller Contractors |
| Change Order Documentation | Project Manager | Shared (PM initiates, Acct records) | Standardized CO Template + Accounting System |
The transition doesn't happen overnight. In firms where project managers have owned these functions for years, resistance is inevitable—not from bad intent, but from habit and from the reasonable concern that details will fall through the cracks in the handoff. Managing the transition well requires:
For smaller general contractors without in-house accounting staff, the model above points toward outsourcing—not to a generalist bookkeeper, but to a construction-literate accountant who understands pay applications, retainage, lien waivers, and job costing. This represents a meaningfully different service than standard small-business bookkeeping, and it should be evaluated accordingly.
The economics typically favor the contractor. Replacing 20-plus hours of PM time per month with a specialized accounting retainer usually costs less while delivering greater accuracy, better documentation, and stronger financial visibility. When a construction lender or bonding company requests certified financials or a WIP schedule, the answer is ready.
Project managers are a firm's most valuable operational asset. They're also, in many firms, the most expensive administrative resource. The billing functions that have accumulated in their lap over the years don't belong there.
Automation makes this transition practical. The right accounting partner makes it sustainable. The firms that make the shift don't just save time—they build the kind of financial infrastructure that supports bonding capacity, owner confidence, and long-term growth.
Heywood CPA is a construction-focused financial services firm serving contractors, subcontractors, and real estate developers in the Intermountain West. We combine CPA credentials with hands-on construction experience to deliver integrated financial services—from bookkeeping and job costing to pay application automation and CFO-level advisory. For inquiries, visit heywoodcpa.com.