The Backcharge, and When It's Fair to Use One

Why this matters

A backcharge is money you deduct from what you owe a subcontractor to cover a cost their failure created: the cleanup they skipped, the damage they caused, the work you had to hire someone else to fix. Used right, it makes the sub who caused a problem pay for it instead of you. Used wrong, it is theft with a spreadsheet, and it turns a good sub into an enemy and sometimes into a lien on your job. The line between the two is not the amount. It is whether the charge is real, documented, and communicated before you spring it on their check.

What a backcharge actually is

A backcharge shifts a cost back to the party responsible for it. The classic cases:

• The sub left debris and you paid a hauler, or your own crew burned hours cleaning up.
• The sub damaged finished work (yours or another trade's) and it had to be repaired.
• The sub's scope failed inspection or was defective and you paid someone to correct it.
• The sub no-showed a committed day and you paid overtime or a rush fee to hold the schedule.

It is not a discount you invented because the job got tight, and it is not a way to claw back margin you underbid. If the cost would have existed whether or not the sub failed, it is not a backcharge.

The fairness test

Before you deduct a dollar, run the charge through four questions. A fair backcharge answers yes to all four.

1. Did the sub actually cause it? Not "the job went over," but a specific failure tied to their scope. If your own scoping was wrong or you supplied a bad part, the cost is yours.
2. Did you give them the chance to cure it first? A professional sub fixes their own miss at their own cost. Charging them for a correction you never let them make is the fastest way to a dispute.
3. Is the cost real and documented? A receipt, an invoice, your labor hours at a defensible rate. A round number pulled from the air will not survive a challenge.
4. Did you tell them before the check, not with it? A backcharge that appears as a silent deduction reads as a stiff. One raised in writing, with a chance to respond, reads as a business dealing.

Miss any one of these and you have a grievance, not a backcharge.

Notice and the chance to cure

The single move that keeps a backcharge defensible is written notice before you act. The moment the problem appears:

• Tell the sub in writing what is wrong, what standard it violates, and what "fixed" looks like.
• Give a reasonable deadline to correct it themselves. Most reputable subs will.
• State plainly that if it is not corrected by the deadline, you will have it done and backcharge the cost. Now the deduction is a consequence they chose, not an ambush.

This order matters even when you are certain they will not fix it. The paper trail is what makes the charge stick if it ever gets tested.

Documenting so it holds

A backcharge you cannot prove is a backcharge you will end up refunding. Build the file as it happens:

• Photos of the defect, the damage, or the mess, before anyone touches it.
• The written notice and the sub's response, or the silence where a response should be.
• The actual cost: the third-party invoice, or your crew's hours and the rate you applied.
• The scope the failure violated, so you can show it was their responsibility and not out of scope.

Tie the charge to a specific line, not a lump sum. "Cleanup, two hauler runs" plus the invoice beats "site issues" every time.

When you are on the receiving end

Subs get backcharged too, sometimes unfairly, so know the defense. If a general contractor hits your check with a deduction:

• Ask for it in writing with the backup: what you supposedly caused, the cost, and the proof. A backcharge with no documentation is one to contest.
• Check whether you were given a chance to cure. If they never told you and never let you fix it, that is a strong argument the charge is improper.
• Look at your contract. A clean subcontract requires written notice and a cure period before any backcharge. Many do. If yours does and they skipped it, say so.
• Do not let it ride. An uncontested backcharge becomes the norm. Dispute the unfair one in writing, promptly, and keep the thread professional.

The same fairness test you would apply before charging a sub is the test you hold a GC to when they charge you.

The judgment to bank

A backcharge is a tool for making the responsible party pay, not a lever for fixing a bad bid or squeezing a sub you are done with. Real cause, chance to cure, documented cost, notice before the check. Charge that way and the good subs keep working with you, because they know a fair deduction is the only kind you will ever send.

References

• Trade-standard subcontract practice on backcharge notice and cure requirements
• U.S. Small Business Administration: subcontracting and dispute-management guidance
• See related: The Sub Who Does Bad Work Decision Tree; Documenting a Sub's Work to Protect Yourself; The Red Flags in a Commercial Contract a Sub Should Catch