What is a Lien?

A payment application (or pay app) is a comprehensive collection of documents that construction contractors submit to request progress payments throughout a project. Rather than just a simple invoice, payment applications include multiple forms and supporting documentation that prove what work was completed, which materials were used, and what payment is due. The typical pay app package includes: 

• an application for payment form, 
• a continuation sheet with schedule of values details, 
• lien waivers, and 
• often backup documents like material receipts and payroll reports. 

Payment applications are submitted on predetermined schedules—whether monthly, at project milestones, or when specific percentages of work are completed—and serve as the primary billing mechanism for longer, higher-budget construction projects.

For subcontractors, mastering payment applications is critical because they directly impact cash flow and project profitability. The process involves coordinating between accounting teams, project managers, and vendors to gather all required documentation before submission deadlines. Common mistakes—like using incorrect forms, missing documentation, math errors, or late submissions—can delay payments and disrupt cash flow. Many GCs have their own custom forms and specific requirements, making attention to contract details essential. 

For detailed guidance on navigating the entire pay app process, check out our payment application guide. Or better yet, check out Siteline—built specifically for commercial subcontractors to streamline the entire payment application process. Siteline handles any custom pay app form, assembles all required lien waivers for you and your lower tiers, and tracks change orders to ensure accurate, on-time submissions. Subcontractors using Siteline get paid up to three weeks faster than with traditional manual processes. Request a demo here and see how Siteline puts your pay apps on autopilot so you can focus on the work that matters most.

Accrued expenses in the construction industry refer to the costs that have been incurred but not yet paid for by the end of an accounting period. These could include expenses related to labor, materials, utilities, equipment rentals, and other operational costs integral to a construction project. For example, a construction company may have used subcontractors for a part of the ongoing project, but the bill has not been paid by the end of the accounting period. This cost forms 'accrued expenses'. Even though these expenses are unpaid, they are recorded in the company’s income statement for that period, which allows for accurate reflection of costs associated with revenues earned. Accrual accounting methods offer a more precise measurement of a construction company’s financial health, providing a comprehensive picture of its earnings and expenditures.

Underbilling refers to a scenario in the construction industry where the actual costs incurred on a project surpass the billed amount for a specific time period. Often occurring unintentionally due to unexpected cost variations, it results in a deficit situation for the contractor. It is essentially an imbalance where the contractor has delivered more work or materials than they have billed the client for. Underbilling can strain cash flow and disrupt project schedules if not addressed promptly. While this might prove beneficial to the client in the short term, contractors need to ensure that they identify and rectify underbilling to maintain project profitability and financial stability.