What is the ideal AP workflow for a general contractor?

Why GC AP Workflows Break Down

Accounts payable in general contracting is structurally more complex than AP in most industries. Invoices arrive from dozens of subcontractors and suppliers simultaneously—often mid-job-cycle—and must be coded to specific cost codes, cost types, and job numbers before they can move forward. The controller rarely sees an invoice until it has already passed through a project manager, a superintendent, or both.

This handoff chain is where the workflow fractures. Common failure points include:

• Invoices received outside the AP system — emailed directly to PMs, dropped at the job site, or faxed, creating a shadow queue the controller never sees.
• Missing or incorrect cost codes — field staff code to the wrong phase or omit the job number entirely, forcing AP to chase corrections before posting.
• Approval bottlenecks — no defined approval threshold matrix means every invoice, regardless of dollar amount, waits for the same senior approver.
• Lien waiver gaps — payments released before conditional or unconditional waivers are collected, creating downstream compliance risk.
• Duplicate invoice risk — the same subcontractor invoice entered manually more than once across billing periods, compounded by retainage complexity.

The Recommended AP Workflow for General Contractors

Implement this sequence as your standard operating procedure. Assign ownership to a named role at each step.

1. Centralized invoice intake — All invoices—email, mail, PDF, or EDI—must enter a single intake queue. Require subcontractors and suppliers to submit to one email address or portal. The AP coordinator owns this queue and is responsible for logging every document within 24 hours of receipt.
2. Header extraction and validation — Capture vendor name, invoice number, invoice date, and gross amount. Flag duplicates against the open invoice register immediately. Do not advance any invoice with a missing invoice number or date.
3. Job and cost code assignment — The AP coordinator assigns the job number and preliminary cost code based on the purchase order or subcontract. If no PO or subcontract exists, the invoice is placed on hold and routed to the PM for a written cost allocation decision.
4. Project manager review and coding confirmation — The PM confirms the cost code, verifies that the work or material described was actually received, and approves or disputes the amount. Set a 48-hour SLA for PM response. Invoices without a response escalate automatically to the project executive.
5. Threshold-based approval routing — Apply a tiered approval matrix: invoices under a defined threshold (e.g., $2,500) are approved by the AP coordinator; above that threshold, route to the project manager; above a second threshold (e.g., $25,000), require controller or CFO sign-off. Document the matrix and enforce it without exceptions.
6. Lien waiver collection and match — Before releasing payment on any subcontractor invoice, confirm that the corresponding conditional lien waiver has been received and matches the payment amount. Track waivers in a dedicated log tied to the job and pay period.
7. Three-way match and ERP posting — Match the approved invoice against the purchase order or subcontract line and the receiving record. Once matched, post to the ERP under the correct job, cost code, and vendor. Generate the payment batch for controller review.

Tips for Construction AP Teams

• Set a hard invoice cutoff date each billing cycle. Communicate it to subcontractors in writing. Late invoices go to the next cycle—no exceptions—so the AP close is predictable.
• Build your approval matrix before you need it. Define thresholds, backup approvers, and escalation timelines in a written policy. A missing backup approver is the single most common cause of payment delays.
• Require PO coverage before goods or services are received. Retroactive POs create cost code ambiguity and are nearly impossible to audit accurately at job close.
• Track lien waiver status as part of the payment run, not after it. Build a waiver checklist into your payment approval step so nothing is released without documentation.
• Automate the intake and routing steps. Platforms like Vergo are built specifically for construction AP—handling invoice capture, cost code suggestions, approval routing, and ERP sync in a single workflow designed around job-cost accounting.

How Vergo Automates This Workflow

Vergo is a construction AP platform built for the GC controller's exact workflow. It captures invoices from any source, extracts header data automatically, and suggests job and cost code assignments based on your existing contracts and POs. Approval routing follows your defined threshold matrix—no manual forwarding required. Lien waiver tracking is embedded in the payment release step.

Vergo integrates natively with all major construction ERPs, including Sage 100, Sage 300, Viewpoint Vista, Viewpoint Spectrum, Procore, Foundation, QuickBooks, Acumatica, CMiC, COINS, Epicor, Jonas, and Deltek. Approved invoices post directly to the correct job and cost code without rekeying.

Controllers using Vergo typically reduce invoice processing time by eliminating the manual handoff steps that account for the majority of AP cycle time in construction.

How Vergo Helps

Vergo is a card-agnostic expense management platform built for construction. Connect any corporate or project credit card and get full visibility and control over field spending.

• Job-cost coding at the point of capture — field teams assign job number, cost code, and cost type from their mobile device before the receipt leaves the job site.
• Per-job spend controls — set card limits by project, cost code, or cardholder so spending stays within approved budgets.
• Mobile receipt capture — superintendents and PMs photograph receipts on-site with automatic data extraction.
• Role-based approval workflows — route expenses through project managers, job-level approvers, and controllers based on your org structure.
• Vergo integrates natively with major construction ERPs, syncing coded expenses directly into job cost and general ledger without manual re-entry.

Related Questions

• What is construction AP automation and how is it different from generic AP software?
• How do general contractors manage hundreds of vendor invoices per month?
• What is the cost of processing a single invoice manually in construction?
• What AP automation software integrates with Procore?