A sample back charge letter to a contractor needs to do five things in plain language: identify the contract, describe the defective or incomplete work, confirm that written notice and a cure period were given and expired, itemize the reasonable cost of correction, and state the new adjusted contract balance. A template follows below, along with the groundwork that has to be in place before the letter will hold up if the contractor pushes back.
Sample Back Charge Letter
Adapt the language to match the specific terms of your agreement. The bracketed fields are the ones you’ll fill in.
[Your Name / Company Name]
[Your Address]
[Date]
[Contractor Name]
[Contractor Address]
RE: Notice of Back Charge — [Project Name / Contract Number]
Dear [Contractor Name],
This letter provides formal notice that [Your Name / Company Name] is deducting remediation costs from the contract balance for [Project Name] under Contract No. [Contract Number], dated [Original Contract Date].
Work performed between [Start Date] and [End Date] was found to be [specific description of defect or incomplete work]. Written notice of this deficiency was provided to you on [Date of Cure Notice], with a [number]-day period to begin corrections as required under [specific contract section]. That period expired on [Expiration Date] without adequate correction.
We retained [Replacement Contractor Name] to bring the work into compliance with the contract specifications. The remediation costs are as follows:
Labor: [Amount]
Materials: [Amount]
Inspection / testing: [Amount]
Total remediation cost: [Total Amount]
The original contract sum of [Original Total] is adjusted to [New Adjusted Total] to reflect this deduction. Supporting documentation, including the original cure notice, photographs, inspection reports, and remediation invoices, is enclosed.
Please update your billing records accordingly. If you wish to dispute this adjustment, please respond in writing within [number] days, consistent with the dispute resolution provisions in [specific contract section].
Sincerely,
[Your Name]
[Your Title]
Enclosures: [List attachments]
Confirm Your Contract Actually Allows a Back Charge
Back charges are not created by statute. They are contractual rights, so your ability to deduct money from a contractor’s remaining balance depends entirely on what the agreement says. If the contract has no clause addressing back charges, deductions for defective work, or the owner’s right to correct and recover costs, you may not be entitled to withhold anything. Before sending the letter, pull the contract and look for language that explicitly permits cost recovery when the contractor fails to perform.
Many standard-form contracts include this right. The AIA A201 General Conditions, for example, allow the owner to correct defective work after giving the contractor written notice and a 10-day window to begin fixing the problem. The deduction then takes the form of a change order reducing the contract sum by the reasonable cost of the correction. If your contract uses similar language, follow those steps exactly. For a custom contract, look for sections titled “Remedies,” “Owner’s Right to Perform,” “Deductions,” or “Set-Off.” The procedure in that clause is the one you have to follow, and deviating from it gives the contractor ammunition to dispute the charge.
Send a Written Cure Notice First
Most construction contracts require you to notify the contractor of a deficiency and give them a defined window to fix it before you bring in someone else. Under the AIA A201 that window is 10 days from receipt of written notice. Your own contract may specify a different period, so check the actual language.1Acquisition.GOV. 48 CFR 49.402-3 – Procedure for Default
This step is not optional, and skipping it is where most back charges fall apart. If you bring in a replacement crew without first giving the original contractor written notice and a reasonable chance to cure, you’ve undercut your own position. The contractor can argue they were never given the opportunity to fix the problem at their own cost, and a court or arbitrator is likely to agree. Send the cure notice in writing, keep proof of delivery, and wait out the full period. If the contractor attempts repairs but does shoddy work a second time, document that too before proceeding.
Keep Remediation Costs Reasonable
The amount you charge back has to reflect the actual, reasonable cost of fixing the defective work. Back charge damages are compensatory, not punitive. You cannot hire a premium contractor at twice the market rate and pass the full bill along, and you cannot pad the charge with inflated administrative fees. The standard is what a prudent person would spend to get the work corrected under similar circumstances.2Acquisition.GOV. Part 31 – Contract Cost Principles and Procedures
Getting competitive bids from at least two replacement contractors before choosing one is the simplest way to show your remediation costs are reasonable. Keep those bids in the file alongside the invoice from whoever you hire.
Documentation to Attach to the Letter
A back charge that lacks supporting records is a number on a page. Before the letter goes out, assemble a file that could convince a neutral third party the charge is justified.
- The contract number or purchase order, along with the specific provision authorizing back charges or owner-performed corrections.
- A dated, written deficiency log describing exactly what went wrong. Vague language like “poor workmanship” invites a fight. Describe the defect in specific, measurable terms: “Grout joints in the lobby tile are inconsistent, ranging from 1/8 inch to 3/8 inch, against the 3/16-inch specification in Section 09 30 00.”
- Timestamped photos of the defective work, taken before any remediation begins, and again of the same areas after the replacement contractor finishes.
- Third-party inspection or engineering reports evaluating the deficiency. Independent verification carries far more weight than your own observations.
- Itemized invoices from the replacement contractor showing labor hours, hourly rates, and material costs. Lump-sum invoices with no breakdown are easy to challenge.
- Copies of prior emails, letters, or texts where you notified the contractor of the problem and asked them to fix it.
This file does double duty. It supports the letter itself, and it becomes your evidence package if the contractor disputes the deduction through mediation, arbitration, or litigation.
How to Send the Letter
Send the letter by USPS Certified Mail with Return Receipt Requested. The certified mail fee is $5.30 per item, and the hard-copy return receipt adds $4.40, so the service fees run roughly $10 before postage.3United States Postal Service. USPS Notice 123 – Price List That’s a small price for a delivery record that holds up in court. The green card you get back proves the contractor received the notice on a specific date, which matters if the dispute escalates.
Keep the return receipt, a copy of the letter, and copies of every enclosure in your permanent project file. If your contract also requires email notification or delivery to a specific address, follow those requirements in addition to the certified mailing. Sending the letter by both certified mail and email on the same day eliminates any later argument that notice was not received.
What Happens After You Send the Letter
One of three things typically happens: the contractor accepts the deduction, disputes it, or ignores it. Your next steps depend on which path they take.
The Contractor Accepts or Does Not Respond
If the contractor accepts the adjusted amount or fails to respond within the timeframe set by your contract’s dispute resolution clause, you can issue the final payment reflecting the deduction. Before you release that payment, request an updated lien waiver showing the new, lower total. A lien waiver that reflects the reduced amount prevents the contractor from later filing a mechanic’s lien claiming you underpaid. If the contractor refuses to provide an updated waiver, note that refusal in writing and consider holding final payment until the issue is resolved.
The Contractor Disputes the Charge
Contractors challenge back charges for a handful of common reasons: the cure notice was insufficient, the remediation costs are inflated, the work actually met specifications, or the contract doesn’t authorize the deduction. If a written dispute comes in, start with the dispute resolution section of the contract. Most commercial construction agreements require mediation or arbitration before litigation, and ignoring that requirement can get your case dismissed on procedural grounds.
This is where your documentation file earns its keep. Timestamped photos, third-party inspection reports, competitive remediation bids, and a clear record of the cure notice and its expiration date are the difference between winning and losing.
The Contractor Threatens a Mechanic’s Lien
A contractor who disagrees with a back charge may threaten to file a mechanic’s lien for the full original contract amount. Lien rights vary significantly by state, including filing deadlines, notice requirements, and whether disputed amounts are even lienable. A properly documented back charge supported by a valid cure notice and reasonable remediation costs is a strong defense against an inflated lien claim. If a lien is actually filed, consult a construction attorney promptly. Lien disputes carry strict statutory deadlines that vary by jurisdiction, and missing one can be costly regardless of who is right on the merits.
Mistakes That Get Back Charges Thrown Out
A few patterns show up again and again in disputes. Avoiding them dramatically improves your odds of the deduction holding up.
- No written cure notice. Verbal complaints don’t count. Without a written notice, proof of delivery, and a clear deadline, the contractor’s attorney will argue their client was never given a fair chance to fix the problem.
- Inflated costs. Hiring the most expensive replacement contractor in the area, or billing administrative time at attorney rates, invites a reasonableness challenge. Get competing bids and keep any markup defensible.
- Vague deficiency descriptions. “Work was not up to standard” tells nobody anything. Reference the specific contract section, specification, or drawing the work failed to meet.
- No contract authority. Issuing a back charge when the contract has no provision for one is a gamble. Without contractual authorization, the deduction may be treated as a breach by you rather than a remedy against the contractor.
- Deducting before the cure period expires. Even if you’re confident the contractor won’t fix the problem, jumping the gun on remediation undermines the entire process. Wait out the full period documented in your cure notice.
The letter itself is the simplest part. The real work is confirming your contract supports the deduction, documenting the deficiency thoroughly, giving the contractor a fair shot at correction, and keeping remediation costs honest. Get those pieces right and the letter practically writes itself.