Subcontractor Agreements: Stop Hiring on a Handshake

You have known your drywaller or tile installer for years. You trade quick text messages about dates and rates, shake hands on site, and get to work. That informal approach runs smoothly right up until a sub punctures a water line behind fresh sheetrock, vanishes for ten days to work on another contractor's job, or leaves a four-item punch list untouched while demanding final payment.

When a customer complains about shoddy trade work or blown deadlines, they do not hold your subcontractor accountable. They hold you accountable. The homeowner hired your business, signed your contract, and expects you to fix mistakes on your dime. Running your jobs on verbal agreements leaves you with all of the liability and none of the leverage.

Every sub who steps onto your job must carry their own general liability and workers' compensation coverage. If an uninsured sub drops off a ladder or damages an expensive hardwood floor, that loss rolls directly downhill to your policy. A single serious injury can hike your premiums for years or trigger an audit from your state workers' compensation board.

Require a Certificate of Insurance directly from your subcontractor's agent before work begins, not after. Make sure your business is listed as an additional insured so their policy covers claims arising from their work. Insurance regulations, liability limits, and sole proprietor exemption rules differ widely by state and trade, so verify specific requirements with your local commercial insurance agent and state licensing board.

Vague scopes create bitter arguments. Writing rough-in electrical per plan leaves too much room for interpretation. Your written agreement needs to detail exactly what the sub furnishes, what you provide, and what tasks belong to their crew.

Spell out who handles permitting, who furnishes rough consumables like fasteners or adhesives, and who hauls demo debris offsite. If you expect the jobsite swept clean and scrap piled neatly at the end of each shift, put it in writing. If you require standard work hours to satisfy local noise ordinances or client requests, define those boundaries clearly.

Never pay subcontractors on a fixed weekly schedule or release draws based on hours logged. Structure your sub payments around verified, finished milestones. If the trade's work requires a municipal inspection—such as framing, electrical, or plumbing rough-ins—payment should stay on hold until the local inspector signs off.

Require signed lien waivers with every invoice you pay. If your subcontractor buys lumber, pipe, or fixtures on credit and fails to pay their supplier, that supplier can often file a mechanic's lien against your client's property. A signed conditional lien waiver protects you and your homeowner from paying for the exact same materials twice. Lien laws and notice requirements vary significantly by jurisdiction, so review standard forms with a local construction attorney.

Defective work happens. The problem comes when a sub refuses to return to fix a crooked wall or damaged trim, forcing you to step in or hire someone else. If your contract lacks a clear backcharge clause, withholding money from that sub's final invoice turns into a messy confrontation.

State clearly in your agreement that if work fails to meet project specifications or causes damage to other trades, you will give the sub written notice with a defined cure window—such as 48 or 72 hours—to make corrections. If they fail to fix the defect within that window, your agreement should give you the explicit right to hire a replacement crew or complete the repair in-house, deducting the actual labor and material costs from their remaining balance.