Progress billing best practices are what separate GCs who get paid predictably from GCs who spend half their time chasing payments. After working with hundreds of construction pay applications, the pattern is clear: billing problems are process problems, not people problems.

Fix the process and the payments follow.

Billing Is a Cash Flow Engine

Most GCs treat billing as an accounting function. It is not. Billing is the engine that converts completed work into cash. Every inefficiency in the billing process extends the gap between spending money and receiving money.

On a $20 million project with monthly billing of $2 million, a 5-day delay in the billing cycle costs approximately $8,000-16,000 per month in working capital impact. Over a 12-month project, that is $96,000-192,000 in unnecessary financing cost.

The billing process deserves the same attention as the construction schedule because it has the same financial impact.

Tip 1: Bill Everything You Are Entitled To

The most common billing problem is underbilling, not overbilling. GCs leave money on the table every month by not billing for:

Stored materials. Materials purchased and stored but not yet installed. On procurement-heavy months, this can represent $100,000+ in unbilled costs.

Change order work. Approved change orders that have not been added to the SOV. Every month of delay is a month of unbilled approved revenue.

General conditions. Monthly general conditions (superintendent salary, field office, temporary facilities) that should be billed based on time elapsed, not project completion percentage.

Commonly Underbilled Item	Typical Monthly Impact	Annual Impact on $15M Project
Stored materials	$50,000-150,000	$600K-1.8M in delayed recovery
Unentered change orders	$20,000-100,000	$240K-1.2M unbilled
General conditions timing	$10,000-30,000	$120K-360K delayed

Bill everything you are contractually entitled to, every month. Do not leave money sitting in your field trailer.

Tip 2: Sync Your Sub Billing Deadlines

Your pay application is only as complete as your subcontractor billing. If three subs miss the billing deadline, you either submit an incomplete pay application or delay your own submission.

Both options cost money.

Set subcontractor billing cutoffs 3-5 days before your own submission deadline. Make the deadline a contractual requirement. Follow up with any sub who has not submitted by 24 hours after the cutoff.

Tip 3: Verify Before You Submit

Every completion percentage in your pay application should be verified against physical work in place. This is not about catching subcontractors cheating. It is about submitting an accurate pay application that does not get returned by the owner or architect.

A returned pay application adds 2-4 weeks to the payment cycle. One return per quarter costs you a month of cash flow over the course of the project.

Spend the time on field verification upfront. Walk the project. Check the percentages. It is cheaper than a returned pay application.

Tip 4: Front-Load Your Close-Out Documentation

Retainage release is conditioned on close-out documentation: warranties, O&M manuals, as-built drawings, training records, final lien waivers. On a $15 million project, retainage at 5% is $750,000. That money sits with the owner until every close-out condition is satisfied.

Start collecting close-out documents from subcontractors at 75% completion. Do not wait until the project is finished. Subcontractors are most responsive when they still have work on the project. After they demobilize, getting documents from them takes months.

Tip 5: Track the Owner's Review Time

The contract says the architect has 7 days to review the pay application. Track whether they actually meet that timeline.

If the architect consistently takes 14 days instead of 7, you have a contractual issue worth raising. Those 7 extra days per month add up to 84 days of delayed payment over a 12-month project.

Document the delays. Raise them with the owner in writing. Reference the specific contract clause that sets the review period. Most owners will address the issue when presented with documented evidence.

Tip 6: Reconcile Retainage Monthly

Retainage discrepancies between the GC's records and the owner's records are common. They usually result from rounding differences, rate change timing, or change order retainage calculation errors.

Do not wait until close-out to reconcile. Compare your retainage balance to the owner's statement monthly. Catch discrepancies when they are small and easy to resolve.

A $5,000 discrepancy in month 3 is a 5-minute conversation. A $50,000 discrepancy discovered at close-out is a weeks-long investigation that delays your retainage release.

Frequently Asked Questions

How much time should a GC's project team spend on billing each month?

Billing should take 2-4 days per month per project for the project engineer (field verification and sub review) and 1-2 days for the billing coordinator (consolidation and submission). On large projects with 20+ subcontractors, add an additional 1-2 days for the project manager's review.

Is it better to underbill or overbill?

Neither. Bill accurately. Underbilling finances the owner's project with your working capital. Overbilling creates audit findings and damages your credibility. The goal is to bill exactly what the work in place justifies, every month.

How should a GC handle a month when no significant progress was made?

Submit a pay application anyway. Even if progress is minimal, general conditions costs accrue daily. Skipping a billing cycle means you carry an extra month of unreimbursed costs and break the billing rhythm.

What is the biggest billing mistake GCs make?

Not submitting on time. Late submission is the number one cause of delayed payment. Everything else -- accuracy, documentation, retainage tracking -- matters less if the pay application does not get submitted by the deadline.

How can a GC improve their billing process without adding staff?

Standardize. Use templates for the SOV, the billing calendar, the field verification form, and the submission checklist. Standardization reduces the time each person spends on billing by eliminating the need to figure out the process each month.

Should a GC outsource billing preparation?

Outsourcing billing preparation to a construction accountant or pay application service can work for small GCs without dedicated billing staff. The risk is that an outsourced preparer may not have the field knowledge to verify completion percentages. The ideal model: project staff verify in the field, outsourced staff prepare the documents.

Get Paid Faster

Every billing tip on this list comes down to one thing: closing the gap between work performed and cash received. SubcontractorAudit streamlines the entire billing workflow from subcontractor pay app review to owner submission.

See how it works -- Request a pay app audit