What a backcharge is, and why most of them fail
A backcharge is a deduction from a subcontractor's payment for costs you incurred because of them — cleaning up after a trade that left debris, repairing damage they caused, or completing work they failed to complete.
They're routine on almost every job. And they get disputed and reversed at a striking rate, usually not because the underlying complaint was wrong but because of a procedural failure that was entirely avoidable.
The failure is almost always the same one: the sub was never given written notice and a chance to fix it themselves.
The opportunity to cure
Most subcontracts contain a provision that runs roughly like this: if the subcontractor fails to perform, the contractor may notify them in writing, and if they don't correct it within some period — often 48 or 72 hours — the contractor may perform the work and charge the cost back.
That notice requirement is not a formality. It's the thing that converts your cost into their liability. Skip it and the sub's answer writes itself: nobody told me, I'd have fixed it, you chose to hire someone else at a higher rate and now you want me to pay for it. That argument wins more often than it should, because the contract said to notify and you didn't.
The exception: genuine emergencies and safety hazards generally can't wait for a 48-hour cure period. Document why immediate action was necessary — photos, the condition, the risk — because you're departing from the contract procedure and you'll need to justify it.
The sequence that holds up
- Document the condition first. Photos with dates, the specific location, and what's wrong. Before anything gets touched.
- Send written notice. Name the problem, the location, the contract provision, the deadline, and state that you'll perform and backcharge if it isn't corrected.
- Let the clock run. Actually wait the period the contract specifies. Performing on hour 12 of a 72-hour window undoes the whole thing.
- Document the deadline passing. A photo of the same condition, same angle, after the deadline. This is the pairing that makes the file persuasive.
- Perform, and track the cost properly. Labor by name, classification and hours; materials with invoices; equipment with rates. Not a round number.
- Send the backcharge with the full package. Notice, timeline, before-and-after photos, and cost backup. Not a line item on a pay application.
The notice itself
Notice to cure — debris removal, Level 2
Ray,
Level 2 east corridor has framing debris and offcuts left from your crew's work, blocking the drywall start scheduled Thursday. Photos attached, taken this morning.
Under Section 7.4 of your subcontract, please remove it by 7:00am Wednesday, September 16 — 48 hours from this notice.
If it isn't cleared by then we'll remove it ourselves and backcharge the actual cost, with backup provided. Call me if there's an issue getting a crew there.
— Mike
Note the last line. Offering to talk costs nothing and makes the notice read as a process rather than a trap — which matters, because the sub will be reading it again later if this gets contested.
What makes a backcharge fall apart
| Problem | How it gets argued |
|---|---|
| No written notice | "I was never given a chance to fix it." Usually decisive. |
| Notice given verbally | Disputed, and the contract said written. |
| Cure period not honored | "The deadline hadn't passed when they did the work." |
| Round-number costs | "$2,000 for cleanup" with no backup invites a counter-offer, and you'll take it. |
| No before photos | Whether the condition existed at all becomes arguable. |
| Fault not established | Three trades worked that area. Proving it was this one requires documentation you either have or don't. |
| Raised at closeout | A backcharge surfacing months later, for the first time, reads as a payment tactic — and often gets treated as one. |
The habit worth building
Backcharges are rarely a surprise. Before you deduct anything from a sub's payment, there was almost always a conversation weeks earlier where you told their foreman the area needed cleaning, or the damage needed fixing, and they said they'd handle it.
That conversation is the beginning of the record, and it's the one that never gets written down. If it had been — one line in the daily report, with a name and a date — the backcharge would arrive with a history instead of appearing from nowhere.
Common questions
What is a backcharge in construction?
A deduction from a subcontractor's payment covering costs the contractor incurred because of that subcontractor — cleanup, repair of damage they caused, or completing work they failed to complete.
Do I have to notify a subcontractor before backcharging them?
Almost always yes. Most subcontracts require written notice and an opportunity to cure, commonly 48 or 72 hours. Performing the work without that notice is the single most common reason backcharges get reversed, because the subcontractor can credibly say they were never given the chance to fix it.
What documentation does a defensible backcharge need?
Dated photos of the condition before any work, the written notice citing the contract provision and the deadline, photos after the deadline passed showing it uncorrected, and itemized cost backup — labor by name and hours, material invoices, equipment rates. Round numbers without backup invite a negotiation.
Can I backcharge without a cure period in an emergency?
Generally yes for genuine safety hazards or emergencies where waiting isn't reasonable, but document why immediate action was necessary with photos and a description of the risk. You're departing from the contract procedure and will need to justify that.
Why do backcharges raised at closeout get rejected?
Because a charge appearing months after the fact, for the first time, looks like a payment tactic rather than a documented cost. Backcharges are most defensible when raised close to the event with contemporaneous records.
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See how it worksThis article is general information for contractors, not legal advice. Construction law and contract terms vary by state and by agreement. Talk to a construction attorney about your specific situation.