Progress billing is supposed to keep projects moving smoothly—getting contractors paid as work gets done. But too often, it becomes a source of frustration, delays, and disputes. Missed deadlines, rejected invoices, underbilling, and compliance missteps can pile up quickly, turning cash flow into a constant battle. The job gets built, but the money doesn’t always follow on schedule.
Most contractors already know the pain: You’re waiting weeks for payment because your invoice didn’t match the schedule of values exactly, or a lien waiver was missing, or retainage wasn’t calculated properly. Multiply that by dozens of projects and subcontractors, and suddenly your billing department spends more time chasing corrections than sending clean invoices.
Here’s a closer look at common missteps that create bottlenecks in progress billing—and how to avoid them.
The Lifeblood of Contractor Cash Flow
If you’re asking “what is a progress payment,” you’re already on the right track to fixing the common billing mistakes that hurt profitability. In construction, a progress payment is an invoice for a partial payment made to a contractor at predetermined stages of a project, based on the percentage of work completed or materials installed. Unlike a lump-sum payment at the very end, this billing method is designed to align with your cash flow needs, ensuring you get paid for work-in-progress as you incur labor and material costs.
Understanding this fundamental concept is critical because every mistake outlined below—from a flawed schedule of values to poor change order management—directly impacts your ability to receive these essential payments on time and in full, keeping your projects financially healthy from groundbreaking to punch list.
1. Not Sticking to the Schedule of Values
The schedule of values (SOV) is the backbone of progress billing. Every line item should tie back to the contract, and every billing draw should reflect actual work completed. One of the most frequent mistakes is changing the SOV mid-project or billing against it inconsistently. This creates confusion for the GC or owner, delays payment approvals, and opens the door to disputes.
Another common issue is padding percentages or shifting billed amounts across line items to try and manage cash flow. This might help in the short term, but it creates accounting headaches and flags for auditors down the line.
Tip: Lock in the SOV early and stick to it. Use your project management software to track actual work completion and tie it directly to the appropriate SOV line item. Make sure everyone on your team understands how to bill against it accurately.
2. Underbilling Early in the Project
It might feel conservative or safe to bill less than what’s been completed, especially in the early stages. But underbilling sets off a chain reaction. It distorts work-in-progress reports, hides revenue, throws off job costing, and leads to financial statements that don’t reflect the reality of the job. If you underbill for months, then try to catch up late in the project, you may raise red flags with the owner or GC—or worse, you may not get paid at all.
Underbilling also tightens your own cash flow. Your company is doing the work, paying out payroll and materials, but not bringing in revenue in sync with those expenses.
Tip: Match billing closely to work performed. Use progress photos, inspector sign-offs, or time-tracking data to justify billed amounts. The more real-time your tracking is, the easier it becomes to bill accurately.
3. Sending Incomplete or Late Invoices
Progress billing requires supporting documents—lien waivers, certified payroll reports, updated insurance certificates, subcontractor affidavits, and more. Sending in a partial package is a common reason invoices get kicked back. Even if the amounts are correct, missing a single required form can pause the whole approval process.
Late submissions are just as problematic. Many owners and GCs have strict cutoff dates for submitting payment applications. Miss the window, and you’re waiting another 30 days—or longer.
Tip: Build a standard checklist of required documents for each project type and client. Automate reminders for your billing team using project management or ERP software. Don’t rely on memory or email chains. A missed document equals a missed payment.
4. Failing to Track Retainage Properly
Retainage is a necessary evil, but it becomes a mess when it’s not tracked accurately. Too often, contractors forget to deduct retainage correctly on each line item or invoice the wrong amount. Over time, these errors compound and can create disputes at project closeout.
Even worse is when retainage isn’t tracked per contract. Some contracts require 10% retainage, others 5%, some reduce retainage after 50% completion, and some remove it altogether. Misunderstanding the terms leads to incorrect billing and delayed release of funds.
Tip: Track retainage separately in your billing system. Don’t just manually reduce billed amounts—have a designated field and calculation that applies retainage automatically, based on the contract. This creates consistency and avoids end-of-job confusion.
5. Mismanaging Change Orders
Unapproved or unprocessed change orders are one of the most common traps in construction billing. Billing for work that hasn’t been formally approved can backfire, even if the work is complete. On the flip side, waiting too long to bill for approved changes can result in cash flow gaps or missed payments if the budget is exhausted.
Some contractors fall into the habit of lumping change orders into base contract lines, which makes reconciliation a nightmare. Others track them separately but forget to submit for payment until the project is nearly complete.
Tip: Treat every change order as its own mini-contract. Assign it a separate line on the SOV, and only bill it once approval is in writing. Make it standard practice to push through change orders weekly or bi-weekly rather than waiting until month-end.
6. Poor Communication Between Field and Office
The office relies on the field for accurate progress updates. If that communication breaks down, billings won’t match what’s happening on-site. Field supervisors may think a milestone is done, but QA may still be pending. Or a subcontractor may have finished their scope, but their invoice hasn’t been submitted yet.
When the office estimates percent-complete from outdated spreadsheets or assumptions, billings become inaccurate and harder to defend. That opens the door for rejections and slows the pay cycle.
Tip: Use mobile-friendly tools that allow field teams to log daily progress, photos, and notes directly into your system. Integrate your billing workflow with field updates to make sure the invoice reflects reality, not guesswork.
7. Not Using Technology to Streamline the Process
Many contractors still use spreadsheets, PDFs, and manual processes to generate billing. It’s time-consuming, error-prone, and hard to scale. Manual entry means more room for mistakes, missed deadlines, and lost revenue.
Modern ERP systems like Acumatica can automate key billing functions—auto-generating invoices from project data, flagging missing documents, and ensuring consistency across projects. But tools alone aren’t enough—they need to be set up the right way for construction workflows.
Tip: Make sure your billing process is tightly integrated with job costing, project management, and compliance tracking. Use dashboards to catch bottlenecks early. Get your team trained so that billing is fast, clean, and audit-ready every time.
8. Overcomplicating the Process for Clients
If your progress billing is hard to understand, it’ll take longer to get paid. GCs and owners don’t want to wade through unclear invoices, vague line items, or incomplete backup. If they have to spend time deciphering your billing, they’re more likely to hold it up—or reject it outright.
Every payment delay impacts your cash flow. Worse, unclear or bloated billings can erode trust with repeat clients or slow down future approvals.
Tip: Keep things clean, clear, and consistent. Align invoice formats with what your clients expect. Group similar items, include backup, and use clear labels. Make it as easy as possible for your client to say yes and move it along.
9. Ignoring Compliance Requirements
In regulated jobs—especially public works—billing must meet specific compliance standards. This can include certified payroll, minority subcontractor reporting, DBE tracking, and more. Failure to meet these requirements can void your payment or expose you to penalties.
Some contractors rely on separate systems or manual processes to compile compliance documents, which increases the chances of something slipping through the cracks.
Tip: Make compliance tracking part of your billing system, not a side task. Use integrated tools that pull required data from project activities automatically. The less you rely on manual collection, the better your billing accuracy will be.
The Rollout Crew: Your Construction ERP Partner
Progress billing doesn’t need to be a recurring source of stress. With the right systems and support, contractors can turn billing into a fast, predictable process that keeps revenue flowing and relationships strong.
That’s where The Rollout Crew comes in. We specialize in helping construction companies set up and optimize Acumatica for real-world workflows like progress billing, job costing, and change order management. Our team brings both software expertise and real construction experience, so we know exactly what it takes to make these systems work the way contractors actually need.
If you’re ready to clean up your billing process, eliminate bottlenecks, and get paid faster, let’s talk.