How Do You Spot Overbilling on a Construction Draw Request?

You’ve been managing your project carefully. Then the contractor submits a draw request — a request for payment based on work completed — and the dollar amount looks higher than you expected. You’re not sure if the work done actually justifies that payment, but you also don’t want to hold up progress by asking too many questions.

That hesitation is exactly where overbilling thrives. Most overbilling isn’t intentional fraud. It’s the result of loose accounting, different interpretations of what “complete” means, or billing for materials before they arrive. But the result is the same: you pay more than you should.

Why Overbilling Happens on Construction Draws

I’ve sat on both sides of the contractor table, and I can tell you that most GCs (general contractors) are not trying to cheat you. What actually happens is that construction billing is messy. A contractor might bill for materials the moment they’re ordered, not when they’re delivered. They might bill for labor before a phase is technically complete. They might misread the scope and include work that wasn’t part of the original bid.

The contractor has visibility into every line item, every cost code, and every subcontractor invoice. You don’t. That information gap is where problems hide. When you have less information than the person asking you for money, it’s nearly impossible to know if the number is right.

Here’s what makes this dangerous: if you approve an inflated draw early in the project, the contractor now has cash that should cover later work. When they run into delays or cost overruns later, they’re already spent the money you paid them. You end up funding their problems, not your project.

How to Review a Draw Request Against the Original Bid

Start with the document that should anchor everything: your original bid or proposal. This is your contract’s promise of what work costs what. Pull it out before you look at the draw request.

• Print or display both the bid and the draw request side by side so you can compare line items directly
• Look for items on the draw that don’t appear on the original bid — these are either change orders or overages you didn’t authorize
• Check the unit prices: if the bid said “framing labor: $12 per square foot,” verify the draw is charging $12 per square foot, not $14
• Identify any “lump sum” items — fixed-price categories — and verify the draw isn’t billing piecemeal for work that was supposed to be one price
• Note items that appear on the draw but shouldn’t yet — if framing isn’t finished, you shouldn’t see final trim costs
• Look for vague line items like “labor” or “miscellaneous” without detail — these hide inflated costs and should always trigger a question

Example: Your bid shows “interior drywall: $8,500 for materials and labor.” The third draw request shows “drywall materials: $5,200, drywall labor: $4,100, drywall finishing: $2,800” totaling $12,100. The contractor has broken the lump sum into pieces and is billing more than the total agreed price. This is overbilling, even if each piece individually seems reasonable.

Step 1: Get a Copy of the Current Project Schedule

Before you can judge whether work is complete enough to warrant payment, you need to know what should be complete by now. A written project schedule — a timeline showing when each phase starts and finishes — is your baseline.

• Request a current schedule from the GC in writing, not verbally or by text
• Note the planned start and finish date for each phase: foundation, framing, MEP (mechanical, electrical, plumbing), drywall, etc.
• Compare the schedule date to the draw submission date — if drywall isn’t scheduled to start for two weeks, don’t pay for drywall now
• Watch for contractors who are behind schedule but still billing ahead — this is a common overbilling pattern
• If the schedule has changed since the last draw, ask for a written explanation of why and how it affects the remaining budget
• Keep a dated copy of every schedule version so you can track changes

Example: The schedule shows framing should finish on March 15. On March 10, the contractor submits a draw billing 80% of the framing costs. You haven’t approved any change that would justify early billing. This is a red flag worth investigating before you pay.

Step 2: Walk the Site and Document What You Actually See

The most reliable overbilling detector you have is your own eyes. You don’t need to be a construction expert to see whether work is actually done. Visit the site in person within a day or two of the draw submission, and document what you see.

• Take photos or video of each phase of work on the date you review the draw
• Note the percentage of completion for major phases: is framing 50% done or 90% done
• Check if materials the contractor is billing for are actually on site: lumber, drywall, windows, etc.
• Look for incomplete work that the contractor might still be billing for: rough wiring in walls that aren’t finished, plumbing rough-in before walls are closed
• Talk to the on-site superintendent or crew lead (not just the office) — they often know about delays before paperwork reflects them
• Compare what you see to the draw percentages — if the contractor is billing for 40% of drywall but only 20% is hung, you have a problem

Example: The draw requests 25% of the total project cost, claiming interior framing is 90% complete. You visit the site and see interior walls are framed but rough MEP isn’t finished, and the contractor told you that rough plumbing has discovered a problem that will delay closing walls. The 90% claim is not accurate, and you should adjust the draw downward to reflect actual progress.

Step 3: Request a Detailed Breakdown of Every Line Item

A professional draw request should include detail. If a contractor submits a single line that says “$50,000 for interior work,” that’s not a draw request you can review. Demand specificity.

• Ask for itemized costs by trade: framing, electrical, plumbing, HVAC, drywall, painting, flooring, etc.
• For each trade, request a breakdown showing labor, materials, and subcontractor costs separately
• Ask which materials are on site, which are in transit, and which haven’t been ordered yet — you shouldn’t pay for materials that aren’t there
• Request percentage-complete for each phase, not just an overall project percentage
• Look for invoices from subcontractors backing up the draw amounts — if the plumber’s invoice says $8,000 but the draw bills $12,000 for plumbing, ask why
• If anything is unclear, ask for a written explanation before you approve payment

Example: You ask for an itemized breakdown and discover the contractor is billing $3,000 for “project management” on a $200,000 project, but the bid included project management at no additional charge. That $3,000 shouldn’t be on the draw. Catching this requires asking for detail.

Step 4: Compare Materials Billed to Materials Delivered

Material costs are one of the easiest places to hide overbilling. A contractor might bill for materials the moment they’re ordered, weeks before they arrive on site. You end up financing their supplier.

• Ask the contractor for a list of materials included in this draw with delivery dates
• Cross-reference the list against photos you took at the site — if it says drywall is included in the bill but you didn’t see drywall on site, ask where it is
• Ask for supplier invoices for materials being billed — these show the actual cost and delivery date
• Verify that material costs match what was bid — if drywall was bid at $2 per square foot and the supplier invoice shows $3, the difference is yours to absorb, not the contractor’s
• Watch for “freight” or “delivery” charges that seem inflated — these are easy places to pad costs
• Don’t pay for materials that are on backorder or haven’t shipped yet, no matter what the bid says

Example: The draw bills $18,000 for windows. You ask for the supplier invoice and learn the windows actually cost $14,000. The contractor is charging you $4,000 extra, claiming it’s for “freight and handling.” Freight for windows is typically 5-10%, not 30%. This is overbilling you should push back on.

Step 5: Check Labor Costs Against the Crew Size and Schedule

Labor overbilling is harder to spot because you can’t see an invoice. But you can use logic and math to catch inflated labor costs.

• Ask how many workers the contractor had on site during the billing period and what their daily rate is
• Calculate the expected labor cost based on crew size and days worked — if they billed for 200 labor hours but only 3 workers were on site for 5 days, that’s 120 hours maximum
• Watch for billing that doesn’t match the phase of work — you shouldn’t see finish carpenter costs billed before rough framing is done
• Ask for timesheets or daily logs showing who worked each day — this is standard documentation and any contractor can provide it
• Be skeptical of labor costs that remain constant week to week, regardless of work completed — real projects have variance
• Compare the labor percentage to the bid — if labor was 30% of the bid but now it’s 45% of the draw, understand why

Example: The contractor bills $5,000 in framing labor when they have 2 framers on site. Two framers at $50/hour is $800/day. Five days is $4,000. The $5,000 billing assumes a third worker who wasn’t there. Asking for timesheets would have caught this immediately.

Step 6: Verify That Completed Work Matches Previous Draw Payments

This is a cumulative check. Over time, what you’ve paid should match what’s been built. If the numbers don’t add up, it means either the contractor is overbilling or you’re misunderstanding progress.

• Keep a running spreadsheet of all draws: date, amount, phase of work, and cumulative total paid
• Compare cumulative payments to the original budget — if you’re at 60% of the budget but only 40% of the work is done, you have a problem
• Track which phases of work have been fully paid versus partially paid — this helps you understand what should be free and what shouldn’t
• If a draw includes work from a previous phase that you thought was complete, ask why — it might be corrections or change orders
• Watch for draws that climb faster than progress visibly increases — this is the single best indicator of overbilling
• When in doubt, request a detailed accounting from the start of the project to now, showing every payment and what it paid for

Example: You’ve paid five draws totaling $85,000 on a $200,000 project. You’re told you’re 50% complete. That math checks out. On the sixth draw, the contractor asks for $35,000, which would bring you to $120,000 at 60% complete. That’s moving faster, but if the site work is actually progressing that fast, it’s reasonable. If the site work doesn’t match, the draw is inflated.

What to Watch For

• Vague line items like “labor” or “miscellaneous costs” without itemization — these hide inflated amounts
• Billing for phases out of order — you shouldn’t pay for finish work before rough-in is complete
• Materials billed before they’re on site — ask for proof of delivery or reduce the draw
• Percentage-complete claims that don’t match site conditions — your eyes are better than the contractor’s invoice
• Draws that increase faster than visible progress — if you’re paying 10% more but work looks 3% more complete, something’s wrong
• No supporting documentation — any contractor can provide invoices, timesheets, and delivery receipts; if they can’t or won’t, that’s a problem
• Changes to the fee structure mid-project — “We need to add a 10% supervision fee” suggests the original bid wasn’t realistic
• Labor billed for work that visibly wasn’t done — if interior doors aren’t hung, don’t pay for interior finishing labor

Questions to Ask Your Contractor About Every Draw

Asking questions is not confrontational. A professional contractor expects to defend their billing. If they resist answering, that’s your signal something’s off.

• Can you provide an itemized breakdown of this draw by trade and cost category?
• Which of the materials in this draw are currently on site, and which are in transit or on order?
• What percentage complete is each major phase of work right now, and how does that compare to the original schedule?
• Can you provide supplier invoices for any material costs over $1,000 included in this draw?
• How many workers were on site each day during this billing period, and what are their daily rates?
• Are there any subcontractor invoices backing up the amounts in this draw, and can I see them?
• Why is this phase of work billing higher than it was bid, if that’s the case?
• Have there been any changes to the scope or schedule since the original bid that would explain cost increases?
• Is there any work in this draw that relates to a change order, and if so, which one?
• Can you walk me through the site with me to confirm the work shown in this draw is actually complete?

The Bottom Line

Overbilling on draws is not inevitable, but it is common because most owners don’t have time to verify every line item. Your job is to be unpredictable in your review — sometimes you check everything, sometimes you spot-check, but the contractor should never know which it will be.

The three questions that matter are: Did this work actually happen? Were the materials actually delivered? And does the price match what was agreed? If you can answer all three confidently, the draw is legitimate. If you can’t, don’t approve it until you can.