Concrete change order mistakes that cost you the pour

Concrete is unforgiving in a way most trades are not. If a framer builds the wrong wall, you pull the nails. If a painter uses the wrong color, you roll it again. But when the excavator hits rock at 30 inches and your footing suddenly needs another 14 yards, that concrete gets poured, it cures, and it is permanent — usually days or weeks before anyone signs a concrete change order for it.

That gap between doing the work and papering the work is where concrete contractors lose the most money. The truck showed up. The pump was on the clock. The finishers stayed until 8pm. And the only record of any of it is a text message that says "yeah go ahead."

Below are the concrete change order mistakes that cost crews the most, what each one actually costs, and the two free ways to stop doing them — one for people who want a spreadsheet, one for people who want it signed from a phone before the truck rolls.

What a bad concrete change order actually costs you

Contractors tend to think of an unsigned extra as a delayed payment. It is usually worse than that. Here is the honest chain of consequences when a concrete change order never gets papered properly:

• You eat the material outright. Concrete is bought, delivered and consumed the same day. There is nothing to return, nothing to restock, and no way to prove after the fact how many yards went into which element unless you kept the tickets.
• You eat the labor twice. Once for the extra placement, and again for the crew standing around while somebody makes a decision. Standby time is real money and it is almost never recovered without paper.
• Your schedule slips and the slip becomes your fault. If you added two days of excavation and forming for a condition you did not create, and there is no written time extension, the delay lands on your side of the ledger. Liquidated damages, if the contract has them, get calculated against a schedule that never got adjusted.
• Retainage gets used as leverage. Disputed extras have a way of turning into a "let us settle it all at the end" conversation, and the end is when the GC or owner is holding the most of your money and you have the least leverage. If you want the full picture on that dynamic, read our guide on retainage and change orders.
• Your lien position gets murkier. Lien rights generally rest on being able to show what you furnished and what you are owed. An extra with no signed authorization is exactly the kind of item that turns a clean claim into a fight with a lawyer attached.
• Trust evaporates. Nothing damages a homeowner or GC relationship faster than a surprise invoice for work they do not remember approving — even when they did approve it verbally.

None of that requires a bad client. It only requires a busy one and an undocumented extra.

The concrete change order mistakes that burn crews

1. Pouring on a verbal "go ahead"

This is the number one killer in concrete, because the decision point almost always happens at the worst possible moment: 6:40am, the batch plant is loading, and somebody needs an answer in ninety seconds. So you get a verbal, you pour, and you plan to write it up later.

Later never has the same urgency. And a verbal approval has a nasty habit of getting remembered differently once the invoice lands. The person who said "just do it" may not even be the person with authority to say it — a site super and an owner rep are not always the same signature.

The cost: the entire extra, plus the relationship damage from arguing about it.

2. Not billing the yardage overage

Overpour, waste, short loads, an extra half yard because the subgrade was soft — these get written off constantly because nobody wants to nickel and dime the client. But a slab that takes 8 percent more than takeoff across a whole job is a margin problem, not a rounding error. If the overage came from a condition outside your scope (soft subgrade, over-excavation by others, a grade that was not where the plans said), it belongs on a change order with the delivery tickets attached.

3. Forgetting everything that rides along with the concrete

The most common under-priced concrete change order only includes the concrete. The extra footing depth also means extra excavation, extra spoil hauling, extra forming and stripping, extra rebar, extra tie wire, extra pump time, extra finishing labor, and often an extra mobilization if the pour cannot be combined. Price the whole chain, not the material.

Here is a working checklist for a concrete change order:

1. Yardage and mix design (including any change in psi, fiber, or admixtures)
2. Short-load or minimum-load fees from the supplier
3. Pump or conveyor time, including minimum hours
4. Additional excavation, over-excavation, and spoil removal
5. Forming material and form labor, plus stripping
6. Rebar, mesh, dowels, chairs, and tie wire
7. Vapor barrier, base rock, and compaction
8. Finishing labor, including any overtime for a late pour
9. Curing compound, blankets, or cold-weather protection
10. Testing, inspection, or engineering costs the change triggers
11. Extra mobilization if this becomes its own trip
12. Overhead and profit — at your contract rate, in writing
13. Any calendar days added to the schedule

4. Leaving the time extension off

Concrete extras almost always add days, not hours — cure time does not care how fast your crew is. If the change order only adjusts money and not the completion date, you have effectively agreed to absorb the delay. Write the added days into the same document you write the dollars into.

5. Verbal scope on "unforeseen conditions"

Rock, groundwater, buried debris, a footing that has to step down because the soil report was optimistic — these are the classic concrete extras, and they are also the ones most likely to get argued about because the client feels blindsided by something nobody chose. Documenting the condition at the time you find it, with photos and a dated write-up, is the difference between a paid extra and a hard conversation.

6. One giant change order at the end of the job

Rolling six weeks of extras into a single number on the final invoice guarantees a fight. Nobody approves a five-figure surprise cheerfully. Small, immediate, signed change orders get approved at a far higher rate than one large retrospective one — the same principle we cover in the guide to getting a change order signed fast.

How to write a concrete change order that actually gets paid

A concrete change order does not need to be a legal document. It needs to be clear, dated, itemized, and signed by someone with authority — before the truck arrives if humanly possible, and the same day if not.

The four things that make one hard to argue with:

• The trigger. One plain sentence on why the change exists. "Excavation for footings F3–F6 encountered rock at approximately 30 inches; footings deepened to 44 inches per engineer direction dated [date]."
• The itemized cost. Materials, labor, equipment, markup — broken out, not a single lump number. Attach delivery tickets and pump invoices.
• The schedule impact. Days added, stated in the document.
• The signature. From the person authorized to approve it, with a date.

Photos help enormously in concrete. A shot of the rock, the water in the trench, or the failed subgrade — taken before you fix it — ends most disputes before they start.

Option A: the free Excel concrete change order template

If your process lives in a spreadsheet and you like it that way, use a proper template rather than rebuilding a Word doc every time. Our free Excel change order template is set up for exactly this kind of work: line items for material, labor and equipment, automatic markup and tax, and a revised contract value that recalculates itself, so you are never doing arithmetic in a truck cab. It also includes a change order log tab so every extra on the job sits on one sheet instead of scattered across text threads.

It is free to download, free to use on any number of jobs, and yours to edit — drop in your logo, add a row for pump minimums, whatever your work needs. If a spreadsheet is how your office runs, download the free change order spreadsheet and start there today.

Option B: the free digital tool, signed from a phone

The spreadsheet solves pricing. It does not solve the 6:40am problem — getting a signature before the truck rolls. That is what the free digital change order tool is for: you fill in the change from your phone at the trench, hit send, and the client taps to sign on their end. No printing, no scanning, no chasing anybody to a desk. The revised contract value updates on its own, and every change order on the job stays in one list you can pull up in a dispute.

It is genuinely 100% free — not a trial, not a per-user seat, no credit card — and there is no cap on how many change orders you send. If you want the reasoning behind that, we explain why ChangeOrdersPro is free. Otherwise just create your first change order and send one on your next pour.

Plenty of concrete crews use both: the spreadsheet for pricing out a complicated extra in the office, the app for getting it signed in the field. Neither one costs anything.

A concrete example: the footing that grew

Say a residential foundation is bid at 62 yards. Excavation hits rock on the north footings. The engineer says step the footings down and widen two of them. The real cost of that change is not "a few more yards":

• 11 additional yards of concrete, plus a short-load fee on the second truck
• Two extra hours of pump time against a four-hour minimum
• A day of rock excavation with a hammer attachment, plus the rental
• Extra spoil hauling — rock does not backfill the same way
• Additional rebar for the widened footings, plus the tie labor
• A second inspection because the footing changed after the first sign-off
• Two calendar days added to the schedule

Priced properly, that is a serious number. Handled with a verbal and a promise to sort it out later, it is a serious argument. The paperwork takes ten minutes either way — the difference is entirely in when you do it.

The rule that saves concrete crews the most money

Nothing that costs money gets poured until it is written down and someone with authority has signed it. That is the whole rule. It feels rigid on a Tuesday morning when everybody is standing around waiting on you, and it feels like the smartest thing you ever did on the day the final invoice gets questioned.

If ten minutes of paperwork is the obstacle, that is a solved problem — a template or a phone will handle it. For more on the day-to-day mechanics, our change order guides cover pricing, markup, disputes and state-by-state requirements.

This article is general information for contractors, not legal advice. Contract terms and state requirements vary — check your contract and confirm any legal question with a licensed attorney.

Frequently asked questions

Do I need a change order for a small concrete overpour?

If the extra yardage came from a condition inside your scope, such as normal waste allowance, it is usually already priced in. If it came from something outside your scope — soft subgrade, over-excavation by another trade, or a grade that did not match the plans — write it up as a change order and attach the delivery tickets. The rule of thumb: if the extra cost was caused by someone else’s condition or decision, it belongs on paper.

What should a concrete change order include?

The reason for the change, an itemized breakdown of concrete yardage and mix, pump or conveyor time, excavation and spoil removal, forming, rebar, finishing labor, curing, testing, overhead and profit, plus any calendar days added to the schedule. Attach photos of the condition and copies of delivery tickets, then get it signed and dated by someone with authority to approve it.

Is there a free concrete change order template I can use?

Yes. The free Excel change order template on this site works for concrete work — it has line items for material, labor and equipment, calculates markup, tax and the revised contract value automatically, and includes a log tab to track every change order on the job. Download it, add your logo, and add rows for anything specific to your pours, such as short-load or pump minimums.

Can I get a concrete change order signed before the truck arrives?

Usually, yes, if you are not relying on printing and scanning. Using the free digital tool you can build the change order on your phone at the trench and send it in under a minute; the client signs from their own phone. Getting the signature before the pour is the single highest-value habit in concrete, because once it is placed you have lost your leverage.

Daisy Porter

Co-Founder, ChangeOrdersPro

Daisy writes about the unglamorous side of running a build — the paperwork, the change orders, and the conversations that keep a job profitable. ChangeOrdersPro is the free tool her team built so contractors can send a professional change order and get it signed from a phone in about 30 seconds.