The 73-Day Cash Gap Killing Electrical Subcontractors (Even on Profitable Jobs)
Why Electrical Subs Run Out of Cash on Profitable Jobs
You landed a $340,000 tenant buildout. 22% gross margin on paper. Six weeks in, payroll’s tight. Ten weeks in, you’re floating $80K on a credit card, and the GC just emailed asking whether you’ll have six guys on site Monday for rough-in.
The job is profitable. You are not. That’s the cash gap.
For most electrical subcontractors, there’s a 60 to 90 day window between the day you spend a dollar on a job and the day that dollar comes back. Call it 73 days on average. Across a handful of simultaneous jobs, that gap is the single biggest reason profitable electrical subs go broke.
This post breaks down where those 73 days come from, why electrical gets hit worse than other trades, and the four levers you can actually pull to close the gap.
What Is the Cash Gap for Electrical Subcontractors?
The cash gap is the number of days between when you pay for labor, materials, and overhead on a job and when the money for that work hits your bank account. Gross margin tells you whether the job is profitable. The cash gap tells you whether you can survive long enough to collect it.
Here’s a realistic breakdown on a $340K tenant buildout:
You start rough-in on day 1. Labor and material go out the door immediately.
You bill the GC at the end of the month, day 30.
The GC approves and bills the owner, day 45.
Owner pays the GC, day 60.
GC pays you under pay-when-paid terms, day 73.
10% retainage sits until project closeout — often 6 to 9 months later.
You’ve been funding that job with your own money the entire time. Labor burden, material, van fuel, insurance, rent, your project manager’s salary — all of it — from day 1 to day 73. On a $340K job, that’s $90K to $130K of outflow you’re carrying before a single dollar comes back.
Why Electrical Is Worse Than Most Trades
Three things make the cash gap worse for electrical subs than for a framer, a drywaller, or even most mechanical trades:
Material heavy with long lead times. Switchgear, transformers, panels, and specialty fixtures can require 30% to 50% upfront deposits. That cash goes out before the job even starts, and you can’t bill for stored material until it’s on site — sometimes not until it’s installed.
Labor burden runs 35% to 45%. Licensed journeymen, benefits, workers’ comp, vehicles, tools, and truck stock stack up fast. Your labor cost isn’t what’s on the timecard. It’s what’s on the timecard times 1.4.
Pay-when-paid is standard. Almost every electrical subcontract has it. That means your AR days are tied to the GC’s collection cycle, not your own effort. You can do everything right and still wait.
Stack those three together and the 73-day gap makes sense. It’s not a paperwork problem. It’s the structure of the work.
The 4 Levers That Actually Close the Gap
There’s no silver bullet, but there are four levers electrical subcontractors can pull. You don’t need all four. Moving one by 10 days can keep you out of a line of credit.
Bill earlier in the month, not at the end. Most subs bill on the 25th or the 30th. If your GC cuts their draw on the 10th, you just lost 20 days because your invoice didn’t make the draw. Ask your GC when their draw deadline is, then bill five days before it. That alone can cut 15 to 25 days off your cash gap with no other change.
Front-load the schedule of values. If you’re billing lump sum, weight your SOV toward mobilization, rough-in, and early material deliveries. Don’t bury everything in finals and trim. You’re not overbilling — you’re matching the SOV to actual cost curves. Most subs leave 5% to 10% of the job unbilled for months because their SOV is backloaded.
Bill for stored material. If the contract allows it, bill for material delivered to your yard or to a bonded warehouse. Electrical gear is a big chunk of the job. Getting paid for it 30 days earlier is real cash.
Chase retainage the day substantial completion hits. Retainage is not a tip. It’s your money, and most subs let it sit because they’re already on the next job. Put a retainage log in front of someone whose job it is to chase it. If you’re doing $4M in revenue, you have $200K to $400K in retainage floating at any given time. That’s the difference between a line of credit and a cushion.
Most Electrical Subs Miss This
The number that tells you whether you’re winning or losing this game isn’t margin. It’s AR days — days sales outstanding — and most electrical subcontractors have never calculated it.
Here’s how to do it in 30 seconds:
(Accounts Receivable ÷ Trailing 12-Month Revenue) × 365 = AR days
If that number is above 60, you have a cash gap problem. Above 75, you’re one slow-paying GC away from a missed payroll. Above 90, you’re already borrowing to stay alive even if every job you have is profitable.
AR days is one of the four numbers every subcontractor should be watching monthly. The other three are overhead rate, break-even volume, and job gross margin. Together, those four numbers tell you whether your business is actually healthy — not the balance of your checking account, which is a lagging indicator at best.
The Real Cost of Ignoring the Gap
An electrical subcontractor doing $5M in revenue with 75 AR days is carrying a little over $1M in receivables at any given time. If a line of credit on that costs 9%, that’s $90,000 a year in interest just to keep the business running. On a 10% net margin business, that’s nearly a quarter of your annual profit disappearing into financing costs — before you make a dime.
Close the gap by 15 days and you free up roughly $200K in working capital. That’s a real truck, a real estimator hire, or a real buffer to sleep at night.
Bottom Line
Profit on paper doesn’t keep the lights on. Timing does. If you’re an electrical subcontractor and you’ve ever looked at a profitable job and wondered where the money went, the answer is almost always the 73-day cash gap — not margin, not cost overruns, not the GC you’re mad at.
Josh Luebker is a fractional CFO for trade subcontractors at constructioncfo.net. If you want to see what your cash gap actually looks like on your jobs, that’s the work we do all day long.
