What is a Prime Contractor?

A subcontractor, also known as a trade contractor, is a specialized construction professional that a general contractor (GC), construction management property, owner, developer, or other entity hires to perform specific work on a construction project. Subcontractors typically specialize in a particular trade or craft, such as electrical work, plumbing, HVAC installation, framing, roofing, glazing, flooring, or drywall installation. They are bound by a contract that outlines the tasks they need to perform as well as deadlines and terms of payment. 

Subcontractors are distinguished from GCs in several ways. GCs oversee the entire construction project, managing all aspects from start to finish, including coordinating subcontractors, obtaining permits, and ensuring compliance with building codes and regulations. Subcontractors, on the other hand, focus solely on their specialized area of work and are responsible for completing their specific tasks according to the project's plans and specifications.

Subcontractors face extensive payment cycles, as they cover all labor and material costs upfront for a project yet receive payment last. Progress billing further complicates the matter, mandating that GCs only reimburse subcontractors based on project completion percentage. This system requires subcontractors to invoice GCs every month for the work completed, which exposes them to various factors that can delay progress billing further. These include:

• using the wrong pay application form, 
• missing documentation, 
• lien waiver oversights, 
• submitting pay apps through the wrong GC portal, 
• general project delays and disputes, or 
• the GC’s own cash flow issues.

As a result, most subcontractors wait about 90 days to get paid for the work they’ve already done, which can strain their cash flow and hamper their ability to take on new projects or pay their employees and suppliers.

This is where Siteline comes in. Siteline is a construction billing solution built specifically to streamline the subcontractor A/R workflow. With Siteline, trade contractors can easily generate and submit detailed pay apps tailored precisely to each GC's requirements. The platform also:

• tracks all compliance requirements and stores pertinent documents;
• tracks, collects, and submits lien waivers for the sub and their lower tiers; 
• ensures approved change orders are incorporated into the schedule of values; 
• provides full visibility into billing statuses across projects—including which GCs pay fastest to better anticipate cash flow; and
• creates accurate billing projections to monitor progress and effectively manage backlog.

By eliminating manual spreadsheets and centralizing all billing data, Siteline helps trade contractors accelerate their payment cycle by an average of three weeks. Discover how Siteline can get your subcontracting business paid faster by scheduling a demo today.

Net D, in the context of the construction industry, refers to the "net deliverable" square footage or area of a constructed property. It applies to the actual usable space that remains after the subtraction of communal areas such as shared hallways, staircases, and residential utilities from the gross square footage. In commercial real estate, it typically excludes areas reserved for mechanical systems, structural elements, elevator shafts, and similar components. This figure is critical as it impacts the leasing or selling value of a property and also informs space allocation, cost assessment, and planning considerations during a construction project. Therefore, understanding Net D is key to optimizing building layouts and the planning of space allocations within any construction project.

Billings in excess of costs (also called overbillings) occur when you’ve invoiced your client for more work than you’ve actually completed or incurred costs for. In other words, it represents getting paid ahead of your work schedule.

Here’s how it works: If you’re a concrete subcontractor on a $100,000 job and you bill 50% upfront ($50,000) but have only completed $30,000 worth of work, that $20,000 difference is your billings in excess of costs. You owe your client that work, and until you complete it, that $20,000 remains as a liability on your balance sheet.

For subcontractors, understanding billing in excess of costs is essential because it can be a strategic cash flow tool when used carefully. For example, when bidding on a job, you can be smart about how you structure your schedule of values (SOV)—breaking work down into more detailed line items that allow earlier billing. However, this strategy requires regular monitoring to ensure:

• Your billing somewhat aligns with your actual percentage complete, and 
• The remaining contract value will still cover your remaining costs.

The biggest risk of overbilling is thinking your margins look better than they are, simply because you’re collecting cash faster. Surety companies and lenders also scrutinize overbillings closely, as excessive amounts can signal poor project management or potential cash flow problems down the road.

With Siteline, you can easily track whether you’re billing in excess of your costs by pulling your month-to-month incurred costs and comparing them against your billing progress. This real-time visibility helps ensure you’re billing appropriately while maintaining realistic profitability expectations. If you’re interested in seeing for yourself, schedule a personalized demo of Siteline here.