Backcharges in Construction: How Subs Avoid and Dispute Them

Backcharges in Construction: A Sub's Guide for Multifamily Jobs

You finish the flooring on the third floor, clean up your cuttings, and move to the next building. Six weeks later, an email shows up from the general contractor. It lists nine units with damaged planks, a pile of scrap in a stairwell, and a charge against your next payment.

You remember those units. They were fine when you left. But you have no way to show it, and the units have had a dozen other people through them since. Now you are arguing from memory against a paper trail.

That is how most backcharge fights go. The work was usually good. The proof was missing. This guide covers what backcharges are, where they come from on apartment and condo jobs, and how to build the habits that keep unfair ones off your account and help you answer the ones that land.

What a backcharge is

A backcharge is a cost one party on a project passes to another. On a multifamily job, it usually runs from the GC or owner to a subcontractor. The GC says your trade caused a cost, such as damage, cleanup, rework, or delay, and wants to deduct it from what it owes you.

Some backcharges are fair. If your crew put a cabinet box through a drywall corner and left it, someone has to fix that wall. The trouble starts when a charge is vague, late, or aimed at the wrong trade.

One thing to say plainly: your rights on backcharges, and the notice periods and steps that apply, depend on your contract. Some contracts require written notice within a set time. Some set out how disputes are handled. This article is about jobsite practice, not legal or contract advice. Read your subcontract, and talk to an attorney before you act on any large or contested charge.

Where backcharges come from on multifamily jobs

Four situations account for most of them. Knowing them helps you spot trouble before it turns into a charge.

Damage by other trades

This is the big one, and it is hard to avoid because multifamily units are shared space. Cabinets go in, then countertops, then plumbing trim, then paint, then flooring touch-ups, then appliances. Every trade after you walks over, leans on, or drags things across your finished work.

A chipped countertop edge, a scratched plank, a gouged cabinet door, paint spatter on a finished floor. Each one gets noticed at the punch walk, and the first question is "who did this?" If nobody can answer, the charge often lands on the first trade the GC thinks of.

Cleanup

Trash, boxes, cut-offs, dust, and leftover material in hallways, stairwells, and units. Cleanup charges are small per item and add up across a building.

They are also hard to pin to one trade, because debris from five crews looks the same on the floor. If you cannot show your area was clean when you left, you may end up paying for the whole hallway.

Rework

Something was installed wrong, or installed right but not to what the owner expected. Reveals that do not line up, cabinets out of plumb, tile layout off, a wrong finish.

Some rework is yours. Some comes from a substrate problem the previous trade left, a drawing change nobody passed along, or an unclear spec. A rework charge is only fair if the cause is yours, and that is a question of fact, not opinion.

Missed punch items

The punch walk finds twelve items in a unit. Eleven get fixed. One gets missed, or gets fixed but never confirmed, and shows up again at the owner walk or the warranty walk. By then the GC has had someone else fix it, and the cost comes back to you.

This one is the most preventable. It almost always comes down to a list that did not close out properly.

Photo by Quilia on Unsplash

Why "it was fine when we left" doesn't hold up

Everyone on the job believes their own work was fine when they left. That is why the statement carries no weight on its own. The other trades believe it about theirs.

When a charge comes in, the person reviewing it is not weighing who sounds more honest. They are looking for something they can put in a file. A charge with a photo and a date usually beats a denial with nothing behind it.

There is also a timing problem. The longer between your last day in a unit and the day damage is found, the more people had access. A unit sitting open for a month is a different case from a unit handed over the same afternoon. Without a record of when you finished and what the unit looked like, you cannot draw that line.

So the fix is not a better argument. The fix is evidence made at the time, in the unit, that shows what you did and what condition it was in.

Keep dated, unit-by-unit records

The record that wins disputes is simple. It says: this unit, this date, this scope, this condition. And it says it for every unit, not for a sample.

What to capture at the end of each unit

• Unit number and floor. Every record names the exact door.
• Date finished. Not the date you got around to uploading.
• Photos of the finished scope. Wide shots of each room, plus close-ups of edges, seams, transitions, and corners where damage usually shows up.
• Condition of the area around your work. Clean floors, no debris, no existing damage nearby. This is the shot that answers a cleanup charge.
• Any damage you found when you arrived. If the substrate was bad, or the unit was already scuffed, record it before you start. Pre-existing conditions are the most common reason a sub ends up holding someone else's problem.
• Who was on site. Crew names or the installer assigned to the unit.
• A pass or fail on each item in your scope. Not "done," but each thing checked against the spec.

Photos alone are weaker than you think

A folder of phone photos is better than nothing, but it gets mixed with lunch pictures and other jobs. File names mean nothing. When a charge arrives six weeks later, finding the right five photos takes an hour, and you may still not be able to show when they were taken.

A walkthrough video helps. You walk the unit room by room, and the unit stays tied to what you showed. ProPunch's video walkthroughs with the checklist overlaid are built for this, and each unit ends up as a Verified Turnover Record with the video, photos, item-by-item verdicts, and client sign-off in one place.

You can do a version of this without software. Pick one format, name every file by building, floor, and unit, and do it at the door before you leave.

Get a sign-off when you can

A record you made yourself is useful. A record the GC or owner's rep also acknowledged is stronger. Even a short written confirmation helps: an email or a signature on the unit sheet saying your scope was complete and accepted on that date. Whether a sign-off changes your obligations afterward depends on your contract, so check what it says about acceptance and warranty.

Photo by Anete Lusina on Pexels

When a backcharge notice shows up

A backcharge notice can feel like an accusation. It is better to treat it as a request for information you can answer. Keep the response calm, specific, and in writing.

A practical order of steps

1. Read the notice slowly and check your contract. Look for notice requirements, response deadlines, and how disputes are handled. These vary a lot. If the amount is large, or you are unsure what the contract says, talk to an attorney before you reply.
2. Pin down exactly what is claimed. Which units? Which items? What date was the problem found? What does the GC say it cost? A notice that says "damaged flooring on floors 2 through 4" is not specific enough to answer.
3. Pull your records for those units, and only those units. Dates finished, photos, the walkthrough, any sign-off. Send what answers the claim, not your whole archive.
4. Compare the timeline. When did you finish each unit? When was the damage found? Who else was in the unit between those dates?
5. Separate what is yours from what is not. If some items are fair, say so and offer to fix them. Conceding the real ones makes your pushback on the rest more believable.
6. Respond in writing, item by item. Unit, claim, your record, your position. Attach the photos or video clips for each, and keep the tone factual.
7. Ask for the evidence on their side. What photos or reports does the GC have, and when were they taken? Keep every reply for the file.

What a good response looks like

Say the notice claims scratched planks in unit 312. A weak reply says, "We didn't do that." A strong reply says, "Unit 312 flooring was completed on the 14th. Attached are the finish photos and walkthrough from that day showing no scratches. Paint and appliance install came after our completion. Please send the date and photos from when the damage was found."

That reply does not accuse anyone. It puts dates and pictures on the table and moves the conversation from "who is to blame" to "which trade was in the unit after the flooring."

Work with the GC to put items on the right trade

Most backcharge disputes are really assignment disputes. The damage is real, and the argument is about whose name goes on it. You will get further treating the GC as a partner in sorting that out than treating them as an opponent.

• Raise it early, not at the end. If you see damage from another trade when you arrive, tell the superintendent that day and put it in writing.
• Ask for protection where it matters. Floor protection after you finish, corner guards on cabinets, a lock on finished units. These cost little compared with a stack of backcharges.
• Agree on a sequence. When trades overlap in a unit, ask who goes before you and who goes after. If the order is not written, nobody can say who was last in.
• Share your records. A superintendent who can see your unit records is more likely to look at the other trades' work too.
• Keep it factual. "Unit 218 had two scuffed cabinet doors when we arrived on the 9th. Photos attached" works better than a complaint about the painter.

If your work is tracked by installer, you can also see patterns inside your own crew. Installer tracking shows who is getting units right the first time, so you can fix a habit on your side before a GC finds it for you.

Photo by Serge Le Strat on Unsplash

Habits that prevent backcharges

Records handle the disputes. These habits reduce how many you ever have.

Before you start a unit

• Walk the unit and record the starting condition: substrate, walls, anything already damaged.
• Report problems that affect your work before you cover them up.
• Confirm the unit is ready: right materials, right access, previous trade finished.

While you work

• Keep your area clean as you go. Do not leave the sweep for the end of the week.
• Stage materials in one place and take your packaging with you.

Before you leave

• Do the final walk at the door and check every item in your scope against the spec.
• Record the finished condition, including the clean floor.
• Get the unit locked or handed over, and note who has the key.

After the punch walk

• Confirm each item was fixed, with a photo that shows it fixed. "Done" in a text message is not a record.
• Make sure no item sits open with no name next to it. Unowned items are the ones that turn into charges.
• Check the list again before the owner or warranty walk.

None of this is complicated. It only works if it happens in every unit, not just the ones you worry about. The unit that gets skipped is the one that ends up on the notice.

FAQ

What is a backcharge in construction?

A backcharge is a cost that one party passes to another, most often from a general contractor or owner to a subcontractor. It usually covers damage, cleanup, rework, or delay the GC says your trade caused. Whether and how a backcharge can be taken depends on your contract, so read the terms on notice and payment deductions.

How do I dispute a backcharge I think is unfair?

Start by checking your contract for notice and dispute steps. Then ask for the specific units, items, dates, and cost behind the charge. Respond in writing with your dated records for those units, and ask what documentation the GC has on their side. For larger amounts, talk to an attorney before you respond.

Can I be backcharged for damage another trade caused?

You can be charged if the GC believes your trade did it, whether or not that is right. The way to protect yourself is a record showing the condition of your work when you left and the dates when other trades were in the unit after you. Whether a charge can be taken without proof depends on your contract.

How soon should I respond to a backcharge notice?

Check the contract first, because some set a specific response window and missing it can limit your options. In general, respond as soon as you have pulled your records for the units named. A quick, specific reply tends to go better than a long one sent late.

What records matter most in a backcharge dispute?

Dated records for each unit: photos or a walkthrough video of the finished work, the condition of the surrounding area, any damage you noted on arrival, and a sign-off if you got one. What matters is that they were made at the time, in the unit, and are easy to find by unit number.

Make the proof exist before the notice does

Most backcharges are not won with a better argument. They are won by the sub with a dated record for the unit in question. Record every unit before you leave, and the notices get easier to answer.

If you want that record built into your punch process, with the walkthrough, checklist, photos, and sign-off for each unit in one place, see ProPunch pricing.