Progress billing compliance is the process of ensuring that every pay application accurately reflects the work completed, the materials stored, and the retainage held on a construction project. Non-compliant billing creates audit findings, payment delays, and disputes that cost GCs time and money.

For contractors managing 10-20 subcontractors per project, compliance means verifying that every subcontractor's billing matches the physical work in place -- every month, on every line item.

What Makes Progress Billing "Compliant"

A compliant pay application meets four criteria.

Accuracy. The billed amount for each line item matches the actual percentage of work completed. Overbilling by 5% on a $500,000 line item is a $25,000 compliance failure.

Documentation. Every billing claim is supported by evidence: daily logs, material invoices, equipment records, and inspection reports. A billing claim without backup is an assertion without proof.

Timeliness. The pay application is submitted within the contract-specified window and includes all work performed through the billing cutoff date. Late submissions delay the entire payment cycle.

Conformance. The pay application follows the contract-specified format (typically AIA G702/G703 or project-specific forms) and includes all required attachments (lien waivers, certified payroll, insurance certificates).

How to Build a Compliant Progress Billing Process

Step 1: Establish the Baseline

Before the first pay application, approve the schedule of values for every subcontractor. The SOV defines the billing structure for the entire project. A well-structured SOV makes monthly compliance straightforward. A poorly structured SOV creates compliance problems that compound every month.

Review each SOV line item against your estimate. Confirm that the total matches the subcontract amount. Verify that line items align with the project schedule so billing follows the natural work sequence.

Step 2: Standardize the Monthly Workflow

Create a billing calendar that works backward from the pay application submission deadline.

Activity	Timing	Responsible Party
Subcontractor billing cutoff	Day 1 (e.g., 25th of month)	Subcontractors
Sub pay app submissions due	Day 3	Subcontractors
GC field verification	Days 3-5	Project engineer
GC review and consolidation	Days 5-7	Billing coordinator
Pay application submission to owner	Day 7	Project manager
Owner/architect review	Days 7-14	Owner's team
Certification and payment	Days 14-30	Owner

This calendar leaves buffer time for revisions. When a subcontractor's billing does not match field observations, you need time to reconcile before submitting to the owner.

Step 3: Verify Every Subcontractor Billing

Walk the project with each subcontractor's pay application. For each line item being billed, verify:

The claimed completion percentage matches the physical work in place
Stored materials are on-site (or off-site with proper documentation)
Previous billing on the line item was accurate (cumulative check)
Retainage is calculated correctly

Do not rely on the subcontractor's self-reported completion percentages. Field verification is the foundation of billing compliance.

Step 4: Document Everything

For each monthly pay application, maintain a compliance file that includes:

The subcontractor's original submission
Your field verification notes with completion percentage adjustments
The consolidated pay application as submitted to the owner
All supporting documents (lien waivers, stored materials documentation, change orders billed)
Any correspondence about billing disputes or adjustments

This file is your defense if the owner audits the billing or a dispute arises.

Common Compliance Failures

Failure 1: Billing work not yet started. A subcontractor includes a line item at 5% complete when the work has not begun. Even 5% on a $300,000 line item is $15,000 in non-compliant billing.

Failure 2: Not reducing overbilled line items. If a previous month's billing overstated completion and you catch it during the current month's review, reduce the current billing to correct the cumulative amount. Do not let overbilling accumulate.

Failure 3: Missing lien waivers. Most contracts require conditional or unconditional lien waivers with each pay application. Missing lien waivers can delay the entire payment.

Failure 4: Retainage calculation errors. When the retainage rate changes mid-project (common after 50% completion), errors in the calculation create discrepancies that compound monthly.

Failure 5: Unbilled change orders. Approved change orders that are not added to the SOV and billed in the correct period. This is not overbilling -- it is underbilling. But it still represents a compliance failure because the billing does not accurately reflect the contract status.

Frequently Asked Questions

What is the difference between progress billing and milestone billing?

Progress billing measures completion as a percentage of each SOV line item and bills monthly. Milestone billing bills a fixed amount when predefined project milestones are achieved (foundation complete, structure topped out, etc.). Progress billing is more common on commercial construction. Milestone billing is more common on residential and some design-build projects.

How does a GC verify subcontractor completion percentages in the field?

Walk the project with the subcontractor's pay application. For each line item, visually estimate the percentage of work completed. Compare your estimate to the sub's claimed percentage. If the difference exceeds 5%, discuss it with the sub's foreman and adjust the approved percentage based on your field observation.

What happens if an owner disputes the GC's pay application?

The owner returns the pay application with specific objections. The GC addresses each objection (providing additional documentation, adjusting completion percentages, or correcting errors) and resubmits. The undisputed portion should still be certified and paid per the contract terms.

Can a GC bill for work performed by subcontractors who have not yet submitted their pay applications?

Yes, but it requires careful estimation. The GC can include estimated values for subcontractor work based on field observation, then reconcile with the sub's actual submission in the following month. This practice is common when sub billing deadlines do not align with the GC's submission deadline.

How does certified payroll affect progress billing compliance on public projects?

Public projects with prevailing wage requirements often require certified payroll reports with each pay application. The billing coordinator must verify that all subcontractors have submitted current certified payroll before including their work in the pay application. Missing certified payroll can delay the entire payment.

What is the GC's liability for submitting a non-compliant pay application?

On private projects, the primary consequence is payment delay and potential breach of contract claims. On public projects, submitting false billing can trigger penalties under state false claims acts. On federal projects, the False Claims Act imposes treble damages and per-claim penalties for knowingly submitting false payment requests.

Make Compliance Automatic

Manual billing compliance is time-consuming and error-prone. SubcontractorAudit automates the verification of subcontractor billing against field data, tracks retainage calculations, and flags compliance issues before you submit to the owner.

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