The First Subcontractor Mistake Most Contractors Make

The handshake that works until it doesn't

A lot of contractors take on their first subcontractor the same way they took on their first big job: informally, based on trust, with a plan to sort out the details later. Two guys who've worked together on and off for years finally have enough volume that one brings the other on for a kitchen remodel. There's a rate discussed over text, a start date, maybe a nod about who's bringing the compressor. Nothing gets signed.

Most of the time this works fine, right up until it doesn't. A change order shows up mid-project and nobody agreed on who eats the extra labor. A ladder gets borrowed and comes back with a bent rung. The homeowner pays late, and the sub wants paid on time anyway. None of these are exotic problems. They're the default outcome of skipping a document that takes maybe twenty minutes to write.

Why the first sub is where this usually happens

By the time a contracting business needs a second or third crew, the founder has usually already built some structure around invoicing and scheduling. The first hire is different. It typically happens because a job got too big to handle alone, and speed matters more than paperwork. The person being brought on is often someone the contractor already trusts personally, which makes a written agreement feel unnecessary or even a little insulting to propose.

That instinct is understandable and it's also backwards. Personal trust is exactly why disputes over money and damaged relationships hit so hard later. A stranger you'd never expect to hand you an unwritten deal will just walk away from a bad experience. A friend or longtime referral source sticks around long enough to get genuinely resentful, and that resentment tends to spread through the small, word-of-mouth networks that most trades businesses depend on for their next job. Losing a good subcontractor over a $400 disagreement about who pays for a cracked window is a bad trade even when the contractor is technically right.

This is the same growing-up-the-business problem that shows up when a lawn care side hustle needs to become a real business: the systems that felt optional at one truck stop being optional the moment a second person's income depends on them.

What actually separates a subcontractor from an employee

Most contractors think the line between a 1099 subcontractor and a W-2 employee is about paperwork. It isn't. The IRS uses what it calls the common law rules test, which looks at behavioral control, financial control, and the overall relationship between the parties, not just what form gets filed. The agency's own guidance on classifying workers lays out the practical questions: who decides how the job gets done, who supplies the tools and materials, who sets the hours, and whether the worker is free to take on other clients.

In day-to-day terms: if you're telling someone what time to show up, handing them your tools, directing exactly how to do each task, and they only work for you, that person looks like an employee no matter what the invoice says. A real subcontractor typically shows up with their own tools, quotes a price for a defined scope of work, sets their own schedule within the deadline, and is free to work other jobs at the same time. The IRS explains this distinction directly in its guidance on worker classification, and it matters because the label on paper doesn't override the actual working relationship.

The misclassification risk is specific and it's not rare

Getting this wrong isn't a technicality. If a worker is functioning as an employee but paid as a 1099 contractor, the business can end up owing back payroll taxes, penalties, and interest, and in construction the exposure often runs through workers' comp too: an injured worker classified as a sub with no coverage can leave the general contractor holding the claim.

Some states have made this stricter specifically for construction. Minnesota's independent contractor test for the building trades requires things like a written contract, a separate business entity, and proof the worker carries their own insurance before someone can be treated as a legitimate sub. Pennsylvania's Construction Workplace Misclassification Act goes further and makes a written contract a legal requirement for a construction worker to qualify as an independent contractor at all, not just good practice. A contractor operating without one in a state like that isn't just exposed to a dispute, they may not have a valid independent contractor relationship in the eyes of the law regardless of intent.

What a basic subcontractor agreement needs before day one

This doesn't need to be a twelve-page legal document. It needs to answer the questions that actually cause fights:

• Scope of work. What's included, specifically, and what counts as extra that requires a change order and additional pay.
• Payment timing. When invoices go out, when they're due, and what happens if the client pays the general contractor late. This is where a lot of resentment builds, because the sub often assumes they get paid on completion and the GC assumes they get paid when the client pays.
• Tools, equipment, and materials. Who supplies what, and who's on the hook if something is damaged, lost, or borrowed.
• Responsibility for rework and damages. If the sub's work fails inspection or damages part of the property, who pays to fix it.
• Insurance. Proof the sub carries their own general liability coverage, which matters both for risk and for supporting their status as a genuine independent contractor rather than an employee.
• Termination terms. How either side ends the arrangement if it isn't working, and what's owed for work already completed.

None of this requires a lawyer to draft from scratch, though it's worth having one review a template once and reusing it for every sub going forward. The document doesn't need to be adversarial. It needs to exist before the first invoice, not after the first disagreement, because by the second job it's just part of how the business runs, and nobody remembers it as the thing that almost ended a good working relationship.