When Should a Concrete Contractor Invoice a Customer?

Short answer: When should a concrete contractor invoice a customer is set by the pour, not by the finish. Ready-mix, pump time, and steel leave your account before the truck arrives, so that money gets collected first. Multi-stage work draws at each inspection sign-off — footings, stem wall, slab — because a third party dates those events. The balance is due the day the finish is troweled and the joints are cut, not at 28 days.

Concrete has a cash shape no other trade shares. Your single largest cost is delivered inside a two-hour window, cannot be sent back, and turns into a permanent object on somebody else’s property while you watch. Everything about billing follows from that. What ends up on the paper is a separate question from when it goes out, and the pricing side is worked through in why a concrete estimate came in too low.

When should a concrete contractor invoice — before the pour, by stage, or at the finish?

The job’s stage count decides it. A one-pour job and a footings-to-slab job are billed nothing alike.

Job	Billing shape	Why that shape
Sidewalk or small pad, one pour	Material money up front, balance at finish	Half the job’s cost is on the truck
Driveway, one pour, one to three days	Deposit covering mix, pump, and steel, balance at finish	Excavation and forms happen days before any concrete
Garage or shed slab	Deposit, then balance after the joints are cut	Same shape, more prep
Footings, stem wall, and slab	A draw at each inspection sign-off	Each stage is separately inspected and separately dated
Stamped or decorative flatwork	Deposit, balance at finish, sealer visit billed or scheduled	Sealer is a return trip, and re-sealing is a maintenance sale
Tear-out and replace	Demo and disposal billed on completion of demo	Hauling old concrete is heavy and paid at the scale
Subcontract to a builder	Their pay application cycle, with retainage	The contract set the rhythm before you priced it

The one thing never to do is bill a driveway pour on net 30 after the fact. The plant has already been paid, the pump company has already invoiced you, and you are financing somebody’s driveway out of your own working capital for a month at zero interest.

What does a ready-mix order do to your cash before anyone pours?

It empties it, several days before the customer sees anything worth paying for. Do the volume math and the number becomes obvious.

Concrete is bought by the cubic yard, and yards come out of area and thickness:

square feet × thickness in feet ÷ 27 = cubic yards

For a 4 in slab the shortcut is square feet ÷ 81. A 24 ft × 24 ft garage slab is 576 sq ft, so 576 ÷ 81 = 7.11 cu yd, and you order 7.5 or 8 to cover subgrade variation, spillage, and the wheelbarrow at the end. A 16 ft × 50 ft driveway is 800 sq ft, so 800 ÷ 81 = 9.88 cu yd, ordered at 10.5. Footings work in the same formula from their own dimensions: 120 linear feet of 20 in wide by 10 in deep footing is 1.67 ft × 0.83 ft × 120 ft = 166 cu ft, or about 6.2 cu yd.

Now list what leaves before the customer’s money arrives:

• Ready-mix at the plant, often COD for a small operator, at the psi and mix design the job calls for
• Short-load charges if the order sits below the plant’s minimum
• Pump or conveyor, a separate vendor with its own minimum hours
• Rebar, mesh, chairs, and tie wire
• Form lumber, stakes, and form release
• Fiber, accelerator, retarder, or air entrainment as the mix and weather require
• Excavation, base rock, and compaction
• Disposal of what came out

That is most of the job’s cost, spent before a finisher touches it. So the deposit is not a psychological device, it is the arithmetic of the pour, and it should be written on the estimate that way: material and equipment ordered for the scheduled pour date. Some states cap residential deposits, so check your own rules before you set a standard figure, and use an early progress draw instead of a bigger deposit where a cap applies.

One scheduling fact belongs in the same conversation. Ready-mix has a discharge time limit — the long-standing convention was 90 minutes or 300 drum revolutions, and the current ASTM C94 approach has the purchaser specify the limit at ordering rather than defaulting to it. Either way, the truck cannot wait for a customer who is not ready, which is why access, gate width, and where the truck can sit belong in the estimate rather than in a phone call at 6:40 in the morning.

Should a multi-stage job draw at each inspection?

Yes, and inspections make the best draw triggers available in any trade, because the date is set by someone who does not work for either of you.

A footings-to-slab job has natural cut lines: excavation and forms, footing inspection and pour, stem wall, backfill and compaction, under-slab plumbing and vapor barrier, reinforcement, slab inspection, pour and finish. Draw at the sign-offs. “Draw 2 due on footing inspection approval, dated 14 May” is not a negotiation — it is a document from the building department attached to your invoice.

The alternative, drawing on a percentage of completion, invites an argument about what percentage means when half the work is buried. Nobody disputes an inspection card. Bill within a day of each one while the record is fresh, and the balance owed at any moment stays small enough that a single disagreement never puts the whole job at risk.

Does the cure schedule change when I invoice?

No, and this is where concrete inverts the usual pattern. Your labor ends at the trowel and the saw cut. The slab’s working life starts a week later.

Milestone	Common guidance
Curing period	ACI guidance for mean daily temperatures above 40°F is moisture and temperature maintained about 7 days, or until roughly 70 percent of specified strength
Foot traffic	Typically 24 to 48 hours
Light vehicles	Around 7 days, once strength is well along
Full design load	28 days, which is the age the specified psi is measured at
Control joints	Cut to roughly a quarter of the slab thickness, within hours of finishing depending on saw type and weather
Sealer on decorative work	A separate return visit, per the product

One line on that list has a compliance cost attached, and it belongs in your rate rather than in a surprise. Cutting joints in cured concrete generates respirable crystalline silica, and OSHA’s construction standard at 29 CFR 1926.1153 sets out specified control methods — for walk-behind saws, a saw with integrated water delivery that supplies a continuous stream to the blade, operated and maintained per the manufacturer, with additional respirator requirements once work runs past four hours indoors or in an enclosed area. Water, hose, and the time to set it up are part of the saw-cutting line item.

You bill at finish and print the schedule on the invoice. That block does two jobs. It stops a customer parking a truck on a three-day-old driveway and then calling the crack your fault. And it explains control joints before anyone panics: joints exist so that the slab cracks where you decided rather than where it wants to, and a hairline showing up inside a joint is the design working, not a defect. Setting that expectation in writing on invoice day prevents most of the callbacks this trade gets.

What happens to the invoice when weather kills the pour?

Weather in concrete is not an inconvenience, it is a chargeable scope change, and the only question is whether your estimate said so in advance.

Cold weather has a technical definition worth quoting. ACI’s cold weather concreting guidance treats it as a period of three or more successive days where the average daily outdoor temperature falls below 40°F and the air temperature is not above 50°F for more than half of any 24-hour period. Working in it means heated mixing water, accelerating admixtures, insulated blankets or heated enclosures, and monitoring — real cost, on top of a slower day.

Hot weather runs the other way: an earlier start, retarder, evaporation reducer, wet burlap or curing compound sooner, and more finishers on the slab because the window shrinks. Both belong on the estimate as named conditional lines, priced, so that invoking one is a measurement rather than an announcement.

The cancelled truck is its own line. Plants charge for a load ordered and cancelled late, and that fee is yours unless your estimate says it passes through when the delay is on the customer’s side — an unfinished excavation, a locked gate, an inspector who did not show. Say it once in the estimate and it never has to be argued on the day.

Does invoicing on the same day actually help on a pour?

More here than almost anywhere, because the customer’s opinion of the work is at its absolute peak while the slab is still dark.

A freshly finished slab is uniform, damp, and perfect. Over the next two weeks it lightens, hairlines appear at the joints, efflorescence may bloom, and the color settles unevenly on stamped work. None of that is a defect and all of it looks like one to somebody who has never watched concrete cure. An invoice presented while the crew is washing the chute lands against the best version of the job. The same invoice mailed three weeks later lands against a customer who has been staring at a hairline.

So build the invoice at the truck, walk the slab with the customer, hand it over, and take payment before the trailer is loaded. Two minutes on site beats an evening of paperwork and a follow-up call.

What does a late concrete invoice cost?

More than the interest, and in three distinct ways.

The float is real money, not deferred profit. A $2,300 concrete bill and an $800 pump bill left your account on the pour date. Every day the balance sits unpaid, that is your cash funding a finished asset attached to someone else’s land.

The complaint window opens as the slab cures. Hairlines, color variation, and surface texture all become visible in the two weeks after the pour. Bill on finish day and those are conversations about curing. Bill in week four and they are conversations about the invoice.

And lien rights run on clocks that start early. On many jobs the deadline to preserve a claim is counted from first furnishing of labor or materials rather than from completion, and preliminary notice requirements, deadlines, and forms vary considerably from state to state. On a $9,000 pour that is the difference between a documented claim and a small claims filing. Know your state’s rule before you need it, and lean on the sequence in how to get clients to pay while the clock is still running.

What rhythm do builders and GCs need?

Theirs, and it was fixed in the subcontract you signed.

Expect a monthly pay application tied to a schedule of values, submitted to a cutoff date that has nothing to do with your pour dates. Expect retainage held from every draw until the project closes out. Expect conditional lien waivers exchanged against payments not yet in the bank, and unconditional waivers only after funds clear. Expect pay-when-paid language, which moves the owner’s payment risk onto you, and read it before signing rather than after a slow month.

Practically, that means your invoice has to carry their references — job number, lot and block, phase code, PO — and it has to describe the work in the same words their schedule of values uses. An invoice that says “poured footings” against a line that says “3200 — Cast in Place Concrete, Foundations” gets set aside for a week while somebody works out whether they match. Billing a business rather than a homeowner changes the document in ways that are covered more generally in how to invoice a company.

How do I know the number I am invoicing fast is right?

Pick the unit that matches what drives the cost, then build the price from your own numbers rather than a neighborhood rate.

Scope	Price it by	Because the cost is driven by
Footings, stem walls, piers	Cubic yard	Volume of material and forming
Flatwork: drives, patios, slabs	Square foot	Finish labor and surface area
Forms	Linear foot, with a reuse count	Lumber, stakes, layout time
Rebar and mesh	Pound or square foot	Steel weight and tying labor
Saw cutting	Linear foot	Blade wear and time
Excavation and haul-off	Cubic yard or ton	Volume moved and disposal fees
Pump	Hour or day, with a minimum	The vendor’s own minimum
Finish upgrade — broom, trowel, stamp	Square foot premium	Added labor and materials

Then load a crew hour honestly: wages plus payroll burden, workers comp, liability, truck and trailer, mixer and power trowel, forms consumed, and the unbilled hours spent quoting, staking, and chasing inspections. Divide by the hours you actually sell rather than the hours you work.

Take profit as a margin, not a markup. Add 25 percent to $6,000 of cost and you bill $7,500 and keep 20 percent of it. To keep 25 percent you divide by 0.75 and bill $8,000. Markup multiplies and margin divides, and on a trade where material can be more than a third of the ticket, that gap is the difference between a good year and a busy one. Published per-yard and per-square-foot prices swing enormously by region, psi, access, finish, and season, so use them only to notice you are off by half.

What belongs in the file when the joints are cut?

The batch tickets with the psi and the yardage, the pump invoice, the steel receipt, the inspection cards with their dates, the pour-day photos, the cure schedule you handed over, the disposal tickets, and the miles to the plant and the yard.

Keel exists for the invoice that has to be produced with wet boots at the tailgate. It is an iOS app that runs entirely on the device: no account, no bank connection, no cloud, no login, and an App Store privacy label reading Data Not Collected — which on a rural pour with one bar of signal is the difference between invoicing today and invoicing Sunday night. It carries your numbering series, your logo, your brand color, and lines at whatever unit the scope calls for, with a payment link the customer scans as a QR code. Batch tickets and pump invoices get photographed at the truck and read on device by Apple Intelligence, so the yardage you were charged for stays attached to the job you poured it into. Plant and yard runs log as mileage. Freeboard shows cash minus tax reserve minus committed invoices minus buffer, which for a trade that pays for material before it gets paid for work is the only number that answers whether next week’s pour is actually funded. The ledger is append-only and hash-chained, and the year exports as one file or as the Accountant Pack, a CSV plus a one-page summary PDF. Free is $0 with unlimited invoices, receipts, and mileage. Keel Pro is a one-time $249.99 Lifetime purchase, not a subscription. The general anatomy of the document is set out in what to include on an invoice.

Frequently asked questions

When should a concrete contractor invoice a customer?

Collect the material money before the pour, since ready-mix, pump, steel, and forms leave your account before the customer sees anything. On multi-stage work, draw at each inspection sign-off, because the inspection card carries a third-party date nobody argues with. Bill the balance the day the finish is troweled and the joints are cut, while the slab still looks its best.

Should I take a deposit for a concrete job?

Yes, sized to what you pay before the truck arrives: the ready-mix order, pump minimum, rebar and mesh, form lumber, and base rock. Write it on the estimate as covering material and equipment ordered for the scheduled pour date. Check your own state’s limits on residential deposits, and use an early progress draw instead of a larger deposit where a cap applies.

Do I wait 28 days to invoice a concrete slab?

No. Twenty-eight days is when specified compressive strength is measured, not when your work ends. Bill at finish, and print the use schedule on the invoice: foot traffic typically after 24 to 48 hours, light vehicles around 7 days, full design loads at 28 days. That block prevents the callback where a truck is parked on a three-day-old driveway.

Who pays when weather cancels a concrete pour?

The plant’s late cancellation fee is yours unless the estimate says it passes through when the delay is on the customer’s side, such as an unfinished excavation or a missed inspection. Cold and hot weather work — heated water, accelerators, blankets, retarders, extra finishers — should sit on the estimate as named, priced conditional lines so invoking them is a measurement rather than a surprise.

How do I calculate how much concrete to invoice for?

Square feet times thickness in feet, divided by 27, gives cubic yards. For a 4 in slab, square feet divided by 81 is the shortcut, so a 576 sq ft garage slab is 7.11 cu yd and gets ordered at 7.5 or 8. Bill flatwork by the square foot and volume work like footings by the cubic yard, and print the yardage from the batch tickets.

How is invoicing a builder different from invoicing a homeowner?

A builder pays on a monthly pay application against a schedule of values, submitted to their cutoff, with retainage held until project close-out and lien waivers exchanged at each payment. Your invoice has to carry their job number, lot, phase code, and PO, and describe the work in the same wording their schedule of values uses, or it sits unmatched in a pile.

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This article is general information, not professional or tax advice.