Concrete Customer Won’t Pay: The Order of Moves

Short answer: When a concrete customer won’t pay, the money is already spent — a 24 by 24 patio is roughly 7 yd³ bought the morning of the pour, the pump was billed that same day, and a slab cannot be un-poured. Move in this order: separate normal shrinkage cracking from an actual defect, put the balance in writing, find out whether your ready-mix plant is about to lien the same property, and calendar your state’s lien deadline before arguing about anything else.

Concrete is the most irreversible trade there is. There is no salvage value in a finished slab, no material to reclaim, and no phase of the work you can hold back as leverage once the truck has left. That changes what actually works. The general sequence in how to get clients to pay sits underneath all of this; what follows is what is different when the invoice is for flatwork.

What is the customer actually holding the money over?

Almost never the price. In concrete the stall is triggered by something the owner sees in the surface, usually two to eight weeks after the pour, and most of it is normal behavior in a material that shrinks as it cures.

What they say	What is usually going on	What settles it
”It cracked”	Every slab cracks. Joints do not prevent cracking, they decide where it goes	Your joint plan: spacing at roughly 24 to 36 times the slab thickness in inches read as feet — 8 to 12 ft on a 4 in slab — cut at least a quarter of the thickness deep, within 6 to 18 hours of finishing
”It cracked off the garage corner”	Reentrant corner cracking, a geometry problem the joint layout or added steel is meant to manage	The pre-pour photo showing the joint layout and the steel in place
”It’s flaking”	Scaling, usually first-winter de-icing salt on a slab that has not had a season, or a surface closed early over bleed water	The written care instructions handed over at completion
”It’s blotchy”	Color variation, inherent in integral color and stamped work — load to load, cure rate, sealer coverage	A sample panel named on the estimate
”There’s white powder on it”	Efflorescence. Salts migrating to the surface. Cosmetic and it weathers off	The care sheet again
”It’s thinner than you said”	Sometimes true, and it is pure arithmetic	Delivery tickets against ft² × thickness ÷ 27

That last row is the only one that is a real accounting question, and it answers itself. Yards delivered either match the area and thickness you sold or they do not. Every other row is a conversation you win with paper you either created before the pour or did not.

Say the crack sentence before it is needed, not after. A line on the estimate and again on the invoice — hairline shrinkage cracking is expected in all concrete and is not a defect; control joints direct it — costs nothing and removes the most common reason a check stops.

How much of the job is already out the door?

Concrete spends nearly all of its cost in a single morning, which is why waiting quietly is more expensive here than in trades that bill labor over weeks.

Cost	When it left your account
Ready-mix at the specified psi, plus a short-load surcharge on anything under a full truck of about 10 yd³	Delivered on pour day, on plant terms that start ticking immediately
Pump, conveyor, or buggy rental	Day rate plus yardage, billed for that morning regardless of how the job ended
Excavation, haul-off, and base stone by the ton	Days before anything looked like a slab
Forms, stakes, and the lumber cut to the job	Partly reusable, partly consumed
Mesh or rebar, chairs, and ties	Buried under the pour
Finish crew hours	Paid that week; the finishing window does not pause for a payment dispute
Saw cutting, cure compound, sealer	Within hours or days of placement

By the time an owner goes quiet, the profit is not what is at risk. The plant invoice is, and a past-due ready-mix account stops your next three pours before it stops anything of theirs.

Where can I stop, when a pour cannot be paused?

There is one absolute: once a truck starts discharging, the job finishes. Concrete has a clock built into it, and an abandoned half-placed slab is a demolition bill with your name on it. The realistic decision points are all before or after that morning.

Stage	Can you stop?	What stopping has to look like
Signed, nothing ordered	Yes	Cancel the mix inside the plant’s window and expect a cancellation charge
Excavation open, base not in	Not as-is	Backfill or barricade first. An open excavation in a yard is your liability and it fills with water
Base compacted, forms not set	Yes, cleanly	Nothing on site is at risk
Forms and steel set, mix ordered	Yes, if you cancel in time	Cancel with the plant, recover your forms and stakes, notify in writing
Truck discharging	No	Place it, finish it, cut it
Poured, joints not yet cut	No	Cut on schedule. Skipping joints as leverage manufactures the crack you will be blamed for
Poured and cut, sealer or decorative topcoat outstanding	Yes	Stop at a defined boundary, in writing, citing the payment term

That second-to-last row is the trap. Withholding the saw cut, the cure compound, or the sealer feels like leverage and is actually you creating the defect that ends the argument in their favor. Finish the work that protects the slab, then stop at the cosmetic line.

Do I have lien rights on a slab, and who else is filing?

Yes. Placing a slab, a footing, or a driveway is an improvement to real property, which is the heart of what mechanic’s lien statutes protect. The calendar is where concrete contractors get hurt, because a pour takes one day and the deadline runs from the last day of work, not from the day the invoice went unpaid.

Texas is a useful illustration of how tight that is. On residential construction, an original contractor must file the lien affidavit no later than the 15th day of the third calendar month after the month the work was completed, terminated, or abandoned, and a copy has to go to the owner within five days of filing. Other states run preliminary notices as early as 10 to 20 days from first furnishing. Whatever your state’s version is, look it up once and write the date on the job folder the day you strip the forms.

Then there is the part that belongs only to this trade: you are not the only lien claimant on that address. The ready-mix plant supplied material to the same improvement and has its own claim. When your customer does not pay you and you fall behind with the plant, the plant sends its notice and files against the homeowner’s property, so the owner now has two liens, and you are the reason. Call your plant before that happens. A dispatcher told early will usually work with you on terms; a credit department that finds out from its own aging report will close the account.

What does walking off a formed job cost me contractually?

Read your own agreement for four things before you decide: an express right to suspend for nonpayment, a defined cure period, who owns forms and steel already on the site, and whether attorney’s fees follow the prevailing party. Without the first two, stopping is a breach even if they stopped paying first.

There is a concrete-specific exposure on top of that. A stopped job frequently leaves an excavation, a compacted pad with exposed rebar, or stakes and form boards in a yard that a family uses. That is a physical hazard attached to your decision. If you suspend, the site has to be left safe and the notice has to say so, or the abandonment claim writes itself. Several contractor licensing boards also treat unexcused abandonment as grounds for discipline separate from the money.

Does a concrete balance fit in small claims?

Sometimes, and the answer flips with the size of the pour and with which court you are in. New York shows how much the venue matters: an individual can sue for up to $10,000 in New York City small claims, $5,000 in city courts outside it, and only $3,000 in town and village courts, with corporations and partnerships filing instead in the commercial claims part under its own caps. A driveway replacement in a town court is already over the line.

Job	Realistic venue
Sidewalk section, small pad, a set of steps	Small claims — fast, no lawyer, worth the morning
Patio or a single-car driveway	Depends entirely on the local cap. Check before assuming
Driveway plus apron, garage slab, decorative work	Usually over the cap. Lien first
Footings, foundations, or commercial flatwork	Lien, then a suit to foreclose it, with counsel

You can waive the excess to fit under a cap, and on a $6,000 balance in a $5,000 court that is often the right trade. Decide it with a calculator rather than with temper.

What records make the invoice hold up?

The delivery tickets, first and above everything else. A ready-mix ticket records the mix design, the yardage, the time batched, and any water added on site — and that last line is what decides a strength argument, because water added at the truck by someone else’s request is on the ticket in writing. Behind the tickets: the compacted base photo, the steel in place before the pour, the joint layout, the finish and cure method, the weather that day, and the signed estimate carrying the crack language and the joint plan. The estimate side of that file is covered in how do concrete contractors send estimates, and the invoice itself should already carry everything in what to include on an invoice.

All of that gets made on a phone, standing on dirt, and that is exactly where it gets lost. Keel is an iOS app that keeps it on the device and only there — no account, no bank connection, no cloud, no login, and an App Store privacy label reading Data Not Collected. The final invoice is built at the truck in about a minute with your own numbering, logo, and brand color, and the payment link renders as a QR code the owner scans while standing on the slab. Batch tickets, the stone scale ticket, the pump rental receipt, and the sealer invoice get photographed and read on-device by Apple Intelligence, so the cost behind a disputed line has paper attached instead of fading in a windshield. Freeboard shows cash minus tax reserve, minus committed invoices, minus a buffer, which is how an unpaid pour becomes a visible hole rather than a surprise when the plant statement arrives. Year end exports as one file, or as the Accountant Pack — a CSV plus a one-page summary PDF — and the ledger is append-only and hash-chained, so what you billed cannot quietly change afterward. Free is $0 with unlimited invoices, receipts, and mileage; Keel Pro is a one-time $249.99 lifetime purchase, not a subscription. You can get it on the App Store, and the filing habit behind it is what a contractor receipt organizer is for.

Frequently asked questions

Can I remove a slab if the customer won’t pay for it?

No. Once concrete is placed it is part of the real property, and breaking it out is self-help that converts a collection matter into a claim against you for property damage and trespass. There is nothing to repossess and nothing to resell. Your remedies are the written demand, the mechanic’s lien, and the courts, taken in that order and on the statutory calendar.

The customer says the concrete cracked, so they are not paying. Now what?

Establish which kind of crack it is before conceding anything. Hairline shrinkage cracking occurs in all concrete and is not a defect; control joints determine where it appears, not whether it appears. Show the joint plan, the spacing, the cut depth, and the timing. Structural cracking, heaving, or a crack that ignores the joints is a different conversation and may be a real callback.

How long do I have to file a lien after a concrete pour?

Shorter than most concrete contractors expect, because the clock runs from your last day of work and a pour is a one-day job. Texas requires a residential original contractor to file the affidavit by the 15th day of the third month after the month work was completed. Many states also require a preliminary notice within days of first furnishing. Write your deadline on the job the day you strip forms.

What happens if I cannot pay the ready-mix plant because the customer has not paid me?

The plant has its own lien rights against the same property, so it can file against your customer independently of you. Call the credit department before the account ages, explain the situation, and ask for terms in writing. A supplier that hears it from you usually works with you. One that finds out from an aging report closes the account, and no account means no mix for the next job.

Should I sue a homeowner in small claims over an unpaid driveway?

Only if the balance fits the local cap, and the caps vary far more than people assume — New York alone runs $10,000 in New York City small claims down to $3,000 in town and village courts, with a separate commercial claims part for business entities. Small pads and sidewalks fit comfortably. A full driveway usually does not, which is why the lien is the primary tool on larger flatwork.

What contract language would have prevented this?

Four lines. Payment tied to events rather than to completion alone, with a draw when the base and forms are in. An express right to suspend for nonpayment with a stated cure period. A sentence stating that shrinkage cracking is expected and that joints control its location. And a care instruction naming de-icing salts, so the first-winter scaling call is answered by a document instead of an argument.

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