Why do builders always promise cash and then ask for an invoice after the pour?

Promising cash on the day is the oldest trick in the book for a GC to get a crew to move them to the front of the line. They know you need the liquidity for the next load of ready-mix, so they dangle that envelope to make sure you show up at 6 AM. If a builder tells me it’s cash but then pulls the "talk to my accountant" card once the broom finish is on, that’s the last time I work for him without a massive deposit upfront.

You need to start getting a **mobilization fee** or a 50% deposit before the trucks even show up. If they’re serious about the cash deal, they can hand over half when the forms are set. It’s a red flag when a busy builder starts talking about cash deals anyway—usally means they’re juggling funds from one job to pay for the last one. If you don't have a signed contract that specifically states payment is due upon completion, you’re basicly giving them an interest-free loan for three weeks while you're stuck covering the material costs. I've seen guys who threaten to rip out the slab when this happens, but honestly, that just gets you a lawsuit. The better move is to hold the pour. If I get there and the payment isn't on-site or at least confirmed, the trucks stay in the yard. It sounds harsh, but once that mud is hard, you lose all your leverage. You’ve allready paid for the mix and the finishers, and the builder knows you’re not going to destroy your own work and waste the labor. Another thing that works is sending a digital invoice the night before with a "due on receipt" notice. Tell them your office system won't let you schedule the pump or the delivery unless the payment is processed. And if they still pull the invoice switch? Add a 10% **convenience fee** for administrative processing on the next quote. They’ll either pay the premium or find someone else to screw over, and either way, you aren't the one left holding the bag.

I'm just getting my feet wet in the industry and this is pretty eye-opening. I always assumed a handshake deal with a builder was solid, but I guess that's naive. If you're doing a mobilization fee, how do you handle that if they want to pay via an app like Venmo or Zelle? Does that count as "cash" to most of you guys, or does it have to be an envelope? I’m worried that if I get too aggressive with deposits before I have a big reputation, I’ll just lose the job to some other guy who doesn't care.

To the guy asking about apps—Zelle is alright for small pours, but for a full driveway, I want a cashier's check or cold cash. It gives them thier "paper trail" without making you wait. The trick I use is telling the GC that my supplier has this job on COD. I tell them the trucks won't even pull onto the property unless I've got the payment in hand. It shifts the pressure onto the plant instead of you. If they still play games once the broom finish is on, mention that you'll be filing a preliminary lien notice. That clears up "accountant issues" real fast.

I’ve had luck carrying a blank 'Notice of Intent to File a Lien' form in the truck. If they start giving me the runaround about an invoice, I just pull it out and start filling it out right there on the tailgate while they’re watching. It’s amazing how fast they can suddenly find thier checkbook or call their accountant when they realize you’re ready to cloud the title on the house they’re trying to flip. No one wants to deal with that paperwork over a few grand.

I’ve only done a few side drives for friends, but I've alredy seen that 'accountant' line twice. It’s ussually code for 'I'm floating your money to cover my next lumber delivery.' One thing I’ve started doing is keeping a carbon-copy receipt book in the glove box. When they mention the paper trail, I just pull it out and offer to write a formal receipt on the spot with the job address, yardage, and mix specs. If they still balk, you know it’s a cash flow lie. I also started putting a 'payment upon completion' clause in my bid that includes a 5% late fee if it turns into an invoice. It usually makes the cash appear pretty quick.