What internal controls should a construction company have over accounts payable?
March 27, 2026
Strong AP internal controls for construction firms require segregation of duties, three-way matching against purchase orders and job-cost codes, tiered approval workflows, and immutable audit trails. Vergo enforces these controls with role-based permissions, automated PO matching, and a full approval audit trail tied to cost codes.
The Compliance Context
Construction companies must adhere to strict accounting standards and internal controls to maintain compliance with regulations like the IRS's Accountable Plan rules and lien waiver requirements. Auditors closely examine AP processes, looking for transparent approval workflows, documentation, and automated policy enforcement.
Without these controls in place, construction firms face risks like tax reclassification of reimbursements, lien exposure, and audit findings that can disrupt operations and cash flow.
Risks of Non-Compliance
- Tax reclassification of reimbursements as taxable income
- Increased risk of vendor fraud and errors
- Lien exposure due to missing lien waiver documentation
- Audit findings that delay progress payments
- Operational disruptions from improper WIP reporting
- Legal liability for unauthorized or non-compliant payments
Best Practices
- Enforce segregation of duties between AP clerks, approvers, and check signers.
- Require 3-way matching of purchase orders, invoices, and receipts before payment.
- Automate routing of invoices through multi-level approval workflows.
- Maintain an audit trail of all AP transactions and approvals.
- Implement controls to ensure all lien waivers are properly collected.
- Integrate AP with accounting systems to ensure WIP and other reporting is accurate.
- Leverage AP automation technology to enforce policies and streamline compliance.
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
Frequently Asked Questions
How can I prepare for a construction accounting audit?
Keep detailed documentation of your AP processes, approval workflows, and transaction records. Ensure your internal controls align with industry standards and can withstand scrutiny.
What AP policies should a construction company have?
At minimum, you'll need policies for invoice approvals, reimbursements, vendor management, lien waivers, and segregation of duties. Automate policy enforcement where possible to ensure consistent compliance.
How does AP automation improve compliance?
AP automation platforms like Vergo provide an auditable trail of all transactions, enforce multi-level approvals, and integrate with accounting to ensure accurate reporting. This helps construction firms satisfy regulatory requirements and pass audits.
What are the top causes of AP fraud in construction?
Common fraud risks include lack of approvals, insufficient documentation, rogue vendor accounts, and collusion between AP staff and suppliers. Robust internal controls are essential to mitigate these vulnerabilities.